resolve merge conflicts

packages/opencode/migration/20260504145000_add_sync_owner/migration.sql

@@ -0,0 +1 @@
+ALTER TABLE `event_sequence` ADD `owner_id` text;

packages/opencode/package.json

@@ -83,7 +83,7 @@
   "dependencies": {
     "@actions/core": "1.11.1",
     "@actions/github": "6.0.1",
-    "@agentclientprotocol/sdk": "0.16.1",
+    "@agentclientprotocol/sdk": "0.21.0",
     "@ai-sdk/alibaba": "1.0.17",
     "@ai-sdk/amazon-bedrock": "4.0.96",
     "@ai-sdk/anthropic": "3.0.71",

packages/opencode/script/httpapi-exercise.ts

@@ -776,9 +776,9 @@ const scenarios: Scenario[] = [
     }))
     .status(200),
   http
-    .post("/experimental/workspace/{id}/session-restore", "experimental.workspace.sessionRestore")
+    .post("/experimental/workspace/warp", "experimental.workspace.warp")
     .at((ctx) => ({
-      path: route("/experimental/workspace/{id}/session-restore", { id: "wrk_httpapi_missing" }),
+      path: "/experimental/workspace/warp",
       headers: ctx.headers(),
       body: {},
     }))

packages/opencode/specs/effect/errors.md

@@ -0,0 +1,329 @@
+# Typed error migration
+
+Plan for moving `packages/opencode` from temporary defect/`NamedError`
+compatibility toward typed Effect service errors and explicit HTTP error
+contracts.
+
+## Goal
+
+- Expected service failures live on the Effect error channel.
+- Service interfaces expose those failures in their return types.
+- Domain errors are authored with Effect Schema so they are reusable by services,
+  tests, HTTP routes, tools, and OpenAPI generation.
+- HTTP status codes and wire compatibility are handled at the HTTP boundary, not
+  inside service modules.
+- `Effect.die`, `throw`, `catchDefect`, and global cause inspection are reserved
+  for defects, compatibility bridges, or final fallback behavior.
+
+## Current State
+
+- Many migrated services use Effect internally, but expected failures are still a
+  mix of `NamedError.create(...)`, `namedSchemaError(...)`, `class extends Error`,
+  `throw`, and `Effect.die(...)`.
+- Some services already use `Schema.TaggedErrorClass`, for example `Account`,
+  `Auth`, `Permission`, `Question`, `Installation`, and parts of
+  `Workspace`.
+- Legacy Hono error handling recognizes `NamedError`, `Session.BusyError`, and a
+  few name-based cases, then emits the legacy `{ name, data }` JSON body.
+- Effect `HttpApi` only knows how to encode errors that are declared on the
+  endpoint, group, or middleware. Undeclared expected errors become defects and
+  eventually fall through to generic HTTP handling.
+- The temporary HttpApi error middleware catches defect-wrapped legacy errors to
+  preserve runtime behavior, but it is intentionally a bridge rather than the
+  final model.
+
+## End State
+
+Service modules own domain failures.
+
+```ts
+export class SessionBusyError extends Schema.TaggedErrorClass<SessionBusyError>()("SessionBusyError", {
+  sessionID: SessionID,
+  message: Schema.String,
+}) {}
+
+export type Error = Storage.Error | SessionBusyError
+
+export interface Interface {
+  readonly get: (id: SessionID) => Effect.Effect<Info, Error>
+}
+```
+
+HTTP modules own transport mapping.
+
+```ts
+const get = Effect.fn("SessionHttpApi.get")(function* (ctx: { params: { sessionID: SessionID } }) {
+  return yield* session
+    .get(ctx.params.sessionID)
+    .pipe(
+      Effect.catchTag("StorageNotFoundError", () => new SessionNotFoundHttpError({ sessionID: ctx.params.sessionID })),
+    )
+})
+```
+
+HTTP-visible error schemas carry their own response status through Effect
+HttpApi's `httpApiStatus` annotation. Prefer `HttpApiSchema.status(...)`, or the
+equivalent declaration annotation, instead of maintaining a parallel status map.
+
+```ts
+export class SessionNotFoundHttpError extends Schema.TaggedErrorClass<SessionNotFoundHttpError>()(
+  "SessionNotFoundHttpError",
+  {
+    sessionID: SessionID,
+    message: Schema.String,
+  },
+  { httpApiStatus: 404 },
+) {}
+```
+
+Endpoint definitions still declare which HTTP-visible error schemas can be
+emitted. The status annotation is only used if the error is part of the endpoint,
+group, or middleware error schema and the handler fails with that error on the
+typed error channel.
+
+```ts
+HttpApiEndpoint.get("get", SessionPaths.get, {
+  success: Session.Info,
+  error: [SessionNotFoundHttpError, SessionBusyHttpError],
+})
+```
+
+The service error and HTTP error may be the same class when the wire shape is a
+deliberate public contract. They should be different classes when the service
+error contains internals, low-level causes, retry hints, or anything that should
+not be exposed to API clients.
+
+## Rules
+
+- Use `Schema.TaggedErrorClass` for new expected domain errors.
+- Include `cause: Schema.optional(Schema.Defect)` only when preserving an
+  underlying unknown failure is useful for logs or callers.
+- Export a domain-level error union from each service module, for example
+  `export type Error = NotFoundError | BusyError | Storage.Error`.
+- Put expected errors in service method signatures, for example
+  `Effect.Effect<Result, Service.Error, R>`.
+- Use `yield* new DomainError(...)` for direct early failures inside
+  `Effect.gen` / `Effect.fn`.
+- Use `Effect.try({ try, catch })`, `Effect.mapError`, or `Effect.catchTag` to
+  convert external exceptions into domain errors.
+- Use `HttpApiSchema.status(...)` or `{ httpApiStatus: code }` on HTTP-visible
+  error schemas so Effect `HttpApiBuilder` and OpenAPI generation get the status
+  from the schema itself.
+- Do not use `Effect.die(...)` for user, IO, validation, missing-resource, auth,
+  provider, worktree, or busy-state failures.
+- Do not use `catchDefect` to recover expected domain errors. If recovery is
+  needed, the upstream effect should fail with a typed error instead.
+- Do not make service modules import `HttpApiError`, `HttpServerResponse`, HTTP
+  status codes, or route-specific error schemas.
+- Keep raw `HttpRouter` routes free to use `HttpServerRespondable` when that is
+  the right transport abstraction, but prefer declared `HttpApi` errors for
+  normal JSON API endpoints.
+
+## HTTP Boundary Shape
+
+Create an HttpApi-local error module, likely
+`src/server/routes/instance/httpapi/errors.ts`.
+
+That module should provide:
+
+- Legacy-compatible public schemas for `{ name, data }` error bodies that must
+  remain SDK-compatible during the Hono migration.
+- Small constructors or mapping helpers for common API errors such as not found,
+  bad request, conflict, and unknown internal errors.
+- Route-group-specific adapters only when they encode domain-specific public
+  data.
+- A single place to document which public error shape is legacy-compatible and
+  which shape is new Effect-native API surface.
+
+Avoid one giant `unknown -> status` mapper. Prefer small, explicit mappers close
+to the handler or route group.
+
+```ts
+const mapSessionError = <A, E, R>(effect: Effect.Effect<A, E, R>) =>
+  effect.pipe(
+    Effect.catchTag("StorageNotFoundError", (error) => new SessionNotFoundHttpError({ message: error.message })),
+    Effect.catchTag("SessionBusyError", (error) => new SessionBusyHttpError({ message: error.message })),
+  )
+```
+
+Use built-in `HttpApiError.BadRequest`, `HttpApiError.NotFound`, and related
+types only when their generated response body and SDK surface are intentionally
+acceptable. Use a custom schema-backed error when clients need the legacy
+`{ name, data }` body or a domain-specific error payload.
+
+## Migration Phases
+
+### 1. Stabilize The Bridge
+
+Keep the temporary HttpApi error middleware only as a compatibility bridge while
+typed errors are introduced.
+
+- Add tests that prove the bridge catches legacy `NamedError` defects.
+- Add tests that prove declared HttpApi errors still use the declared endpoint
+  contract.
+- Stop returning stack traces in unknown HTTP `500` responses; log the full
+  `Cause.pretty(cause)` server-side instead.
+- Add a comment or TODO that names this plan and states the bridge must shrink
+  as route groups migrate.
+
+### 2. Define The Shared HTTP Error Helpers
+
+Add the `httpapi/errors.ts` module before converting route groups.
+
+- Define a legacy `{ name, data }` body helper for SDK-compatible errors.
+- Define `UnknownError` for generic internal failures with a safe public message.
+- Define `BadRequestError` and `NotFoundError` equivalents only if the actual
+  wire body must match the legacy Hono SDK surface.
+- Put the HTTP status on the public schema with `HttpApiSchema.status(...)` or
+  `{ httpApiStatus: code }`; do not keep a separate name-to-status table.
+- Keep conversion helpers pure and small. They should not inspect `Cause` or
+  accept `unknown` unless they are final fallback helpers.
+
+### 3. Convert One Vertical Slice
+
+Start with session read routes because they already have local `mapNotFound`
+logic and are heavily covered by existing HttpApi tests.
+
+- Convert `Session.BusyError` from a plain `Error` to a typed service error, or
+  add a typed wrapper while preserving the old constructor until callers are
+  migrated.
+- Replace `catchDefect` in `httpapi/handlers/session.ts` with typed error
+  mapping.
+- Add endpoint error schemas for the affected session endpoints.
+- Prove behavior with focused tests in `test/server/httpapi-session.test.ts`.
+- Remove the migrated cases from the global compatibility middleware.
+
+### 4. Convert Legacy NamedError Domains
+
+Move legacy `NamedError.create(...)` services to Effect Schema-backed errors in
+small domain PRs.
+
+Priority order:
+
+1. `storage/storage.ts` and `storage/db.ts` not-found errors.
+2. `worktree/index.ts` `Worktree*` errors.
+3. `provider/auth.ts` validation failures and `provider/provider.ts` model-not-found errors.
+4. `mcp/index.ts`, `skill/index.ts`, `lsp/client.ts`, and `ide/index.ts` service errors.
+5. Config and CLI-only errors after HTTP-facing domains are stable.
+
+For each domain:
+
+- Replace `NamedError.create(...)` with `Schema.TaggedErrorClass` when the error
+  is primarily a service error.
+- Keep or add a separate HTTP error schema when the legacy `{ name, data }` wire
+  shape must remain stable.
+- Update service interface return types to include the new error union.
+- Replace `throw new X(...)` inside `Effect.fn` with `yield* new X(...)`.
+- Replace async exceptions with `Effect.try({ catch })` or explicit `mapError`.
+- Add service-level tests that assert the error tag and data, not just the HTTP
+  status.
+
+### 5. Declare HttpApi Errors Group By Group
+
+For each HttpApi group:
+
+- Inventory every service call and the typed errors it can return.
+- Add only the public error schemas that endpoint can actually emit.
+- Map service errors to HTTP errors in the handler file.
+- Keep built-in `HttpApiError` only for generic request/validation failures where
+  the generated contract is accepted.
+- Update `httpapi/public.ts` compatibility transforms only when the generated
+  spec cannot represent the desired source shape directly.
+- Regenerate the SDK after OpenAPI-visible changes and verify the diff is
+  intentional.
+
+Suggested route order:
+
+1. `session` not-found and busy-state reads.
+2. `experimental` worktree mutations.
+3. `provider` auth and model selection errors.
+4. `mcp` OAuth and connection errors.
+5. Remaining route groups as Hono deletion work progresses.
+
+### 6. Remove Defect Recovery
+
+After enough route groups declare their expected errors:
+
+- Delete `catchDefect` recovery for domain errors.
+- Delete name-prefix checks such as `error.name.startsWith("Worktree")` from
+  HTTP middleware.
+- Delete `NamedError` branches from the Effect HttpApi compatibility middleware
+  once no Effect route depends on them.
+- Leave one final unknown-defect fallback that logs server-side and returns a
+  safe generic `500` body.
+
+## Inventory Checklist
+
+Use this checklist when touching a service or route group.
+
+- [ ] Does the service interface expose every expected failure in the Effect
+      error type?
+- [ ] Are user-caused, provider-caused, IO, auth, missing-resource, and busy-state
+      failures modeled as typed errors instead of defects?
+- [ ] Does the service avoid importing HTTP status, `HttpApiError`, or response
+      classes?
+- [ ] Does the handler map each service error into a declared endpoint error?
+- [ ] Does the endpoint `error` field include every public error the handler can
+      emit?
+- [ ] Does OpenAPI/SDK output either stay byte-identical or have an explicitly
+      reviewed diff?
+- [ ] Do tests cover both service-level error typing and HTTP-level status/body?
+- [ ] Did the PR remove any now-unneeded case from the temporary compatibility
+      middleware?
+
+## Testing Requirements
+
+For service conversions:
+
+- Test the service method directly with `testEffect(...)`.
+- Assert on `_tag` or class identity and the structured fields.
+- Avoid testing by string-matching `Cause.pretty(...)`.
+
+For HttpApi conversions:
+
+- Add or update the focused `test/server/httpapi-*.test.ts` file.
+- Assert status code, content type, and exact JSON body for declared public
+  errors.
+- Add a regression test that the temporary middleware is no longer needed for the
+  migrated route.
+- Keep bridge/parity tests aligned with legacy Hono behavior until Hono is
+  deleted or the SDK contract intentionally changes.
+
+## Verification Commands
+
+Run from `packages/opencode` unless noted otherwise.
+
+```bash
+bun run prettier --write <changed files>
+bunx oxlint <changed files>
+bun typecheck
+bun run test -- test/server/httpapi-session.test.ts
+```
+
+Run SDK generation from the repo root when schemas or OpenAPI-visible errors
+change.
+
+```bash
+./packages/sdk/js/script/build.ts
+```
+
+## Open Questions
+
+- Should legacy V1 routes keep `{ name, data }` forever while V2 routes expose a
+  more Effect-native tagged error body?
+- Should storage not-found remain generic, or should callers map it to
+  domain-specific not-found errors before crossing service boundaries?
+- Should `namedSchemaError(...)` stay as a long-term public-wire helper, or only
+  as a migration bridge for old `NamedError` contracts?
+- Which SDK version boundary lets us stop remapping built-in Effect HttpApi error
+  schemas in `httpapi/public.ts`?
+
+## Success Criteria
+
+- New service code no longer uses `die` for expected failures.
+- A route reviewer can read an endpoint definition and see every public error it
+  can return.
+- The temporary HttpApi error middleware shrinks over time instead of gaining new
+  name-based cases.
+- Service tests prove domain error types without going through HTTP.
+- HTTP tests prove status/body contracts without relying on defect recovery.

packages/opencode/src/acp/agent.ts

@@ -5,6 +5,8 @@ import {
   type AuthenticateRequest,
   type AuthMethod,
   type CancelNotification,
+  type CloseSessionRequest,
+  type CloseSessionResponse,
   type ForkSessionRequest,
   type ForkSessionResponse,
   type InitializeRequest,
@@ -51,9 +53,9 @@ import { LoadAPIKeyError } from "ai"
 import type { AssistantMessage, Event, KiloClient, SessionMessageResponse, ToolPart } from "@kilocode/sdk/v2"
 import { applyPatch } from "diff"
 import { InstallationVersion } from "@opencode-ai/core/installation/version"
-import { ShellID } from "@/tool/shell/id"
 
 import { fetchDefaultModel } from "@kilocode/kilo-gateway" // kilocode_change
+import { ShellID } from "@/tool/shell/id"
 
 type ModeOption = { id: string; name: string; description?: string }
 type ModelOption = { modelId: string; name: string }
@@ -569,6 +571,7 @@ export class Agent implements ACPAgent {
           image: true,
         },
         sessionCapabilities: {
+          close: {},
           fork: {},
           list: {},
           resume: {},
@@ -631,6 +634,9 @@ export class Agent implements ACPAgent {
       // Store ACP session state
       await this.sessionManager.load(sessionId, params.cwd, params.mcpServers, model)
 
+      const messages = await this.loadSessionMessages(directory, sessionId)
+      this.restoreSessionStateFromMessages(sessionId, messages)
+
       log.info("load_session", { sessionId, mcpServers: params.mcpServers.length })
 
       const result = await this.loadSessionMode({
@@ -639,39 +645,6 @@ export class Agent implements ACPAgent {
         sessionId,
       })
 
-      // Replay session history
-      const messages = await this.sdk.session
-        .messages(
-          {
-            sessionID: sessionId,
-            directory,
-          },
-          { throwOnError: true },
-        )
-        .then((x) => x.data)
-        .catch((err) => {
-          log.error("unexpected error when fetching message", { error: err })
-          return undefined
-        })
-
-      const lastUser = messages?.findLast((m) => m.info.role === "user")?.info
-      if (lastUser?.role === "user") {
-        result.models.currentModelId = `${lastUser.model.providerID}/${lastUser.model.modelID}`
-        this.sessionManager.setModel(sessionId, {
-          providerID: ProviderID.make(lastUser.model.providerID),
-          modelID: ModelID.make(lastUser.model.modelID),
-        })
-        if (result.modes?.availableModes.some((m) => m.id === lastUser.agent)) {
-          result.modes.currentModeId = lastUser.agent
-          this.sessionManager.setMode(sessionId, lastUser.agent)
-        }
-        result.configOptions = buildConfigOptions({
-          currentModelId: result.models.currentModelId,
-          availableModels: result.models.availableModels,
-          modes: result.modes,
-        })
-      }
-
       for (const msg of messages ?? []) {
         log.debug("replay message", msg)
         await this.processMessage(msg)
@@ -760,6 +733,9 @@ export class Agent implements ACPAgent {
       const sessionId = forked.id
       await this.sessionManager.load(sessionId, directory, mcpServers, model)
 
+      const messages = await this.loadSessionMessages(directory, sessionId)
+      this.restoreSessionStateFromMessages(sessionId, messages)
+
       log.info("fork_session", { sessionId, mcpServers: mcpServers.length })
 
       const mode = await this.loadSessionMode({
@@ -768,20 +744,6 @@ export class Agent implements ACPAgent {
         sessionId,
       })
 
-      const messages = await this.sdk.session
-        .messages(
-          {
-            sessionID: sessionId,
-            directory,
-          },
-          { throwOnError: true },
-        )
-        .then((x) => x.data)
-        .catch((err) => {
-          log.error("unexpected error when fetching message", { error: err })
-          return undefined
-        })
-
       for (const msg of messages ?? []) {
         log.debug("replay message", msg)
         await this.processMessage(msg)
@@ -801,7 +763,7 @@ export class Agent implements ACPAgent {
     }
   }
 
-  async unstable_resumeSession(params: ResumeSessionRequest): Promise<ResumeSessionResponse> {
+  async resumeSession(params: ResumeSessionRequest): Promise<ResumeSessionResponse> {
     const directory = params.cwd
     const sessionId = params.sessionId
     const mcpServers = params.mcpServers ?? []
@@ -810,6 +772,9 @@ export class Agent implements ACPAgent {
       const model = await defaultModel(this.config, directory)
       await this.sessionManager.load(sessionId, directory, mcpServers, model)
 
+      const messages = await this.loadSessionMessages(directory, sessionId, 20)
+      this.restoreSessionStateFromMessages(sessionId, messages)
+
       log.info("resume_session", { sessionId, mcpServers: mcpServers.length })
 
       const result = await this.loadSessionMode({
@@ -832,6 +797,27 @@ export class Agent implements ACPAgent {
     }
   }
 
+  async closeSession(params: CloseSessionRequest): Promise<CloseSessionResponse> {
+    const session = this.sessionManager.remove(params.sessionId)
+    if (!session) return {}
+
+    await this.sdk.session
+      .abort(
+        {
+          sessionID: params.sessionId,
+          directory: session.cwd,
+        },
+        { throwOnError: true },
+      )
+      .catch((error) => {
+        log.error("failed to abort session while closing ACP session", { error, sessionID: params.sessionId })
+      })
+
+    this.permissionQueues.delete(params.sessionId)
+    log.info("close_session", { sessionId: params.sessionId })
+    return {}
+  }
+
   private async processMessage(message: SessionMessageResponse) {
     log.debug("process message", message)
     if (message.info.role !== "assistant" && message.info.role !== "user") return
@@ -1163,23 +1149,26 @@ export class Agent implements ACPAgent {
     sessionId: string,
   ): Promise<{ availableModes: ModeOption[]; currentModeId?: string }> {
     const availableModes = await this.loadAvailableModes(directory)
-    const currentModeId =
-      this.sessionManager.get(sessionId).modeId ||
-      (await (async () => {
-        if (!availableModes.length) return undefined
-        const defaultAgentName = await AppRuntime.runPromise(AgentModule.Service.use((svc) => svc.defaultAgent()))
-        const resolvedModeId = availableModes.find((mode) => mode.name === defaultAgentName)?.id ?? availableModes[0].id
-        this.sessionManager.setMode(sessionId, resolvedModeId)
-        return resolvedModeId
-      })())
+    const storedModeId = this.sessionManager.get(sessionId).modeId
+    if (storedModeId && availableModes.some((mode) => mode.id === storedModeId)) {
+      return { availableModes, currentModeId: storedModeId }
+    }
+
+    const currentModeId = await (async () => {
+      if (!availableModes.length) return undefined
+      const defaultAgentName = await AppRuntime.runPromise(AgentModule.Service.use((svc) => svc.defaultAgent()))
+      const resolvedModeId = availableModes.find((mode) => mode.name === defaultAgentName)?.id ?? availableModes[0].id
+      this.sessionManager.setMode(sessionId, resolvedModeId)
+      return resolvedModeId
+    })()
 
     return { availableModes, currentModeId }
   }
 
   private async loadSessionMode(params: LoadSessionRequest) {
     const directory = params.cwd
-    const model = await defaultModel(this.config, directory)
     const sessionId = params.sessionId
+    const model = this.sessionManager.get(sessionId).model ?? (await defaultModel(this.config, directory))
 
     const providers = await this.sdk.config.providers({ directory }).then((x) => x.data!.providers)
     const entries = sortProvidersByName(providers)
@@ -1188,7 +1177,7 @@ export class Agent implements ACPAgent {
     if (currentVariant && !availableVariants.includes(currentVariant)) {
       this.sessionManager.setVariant(sessionId, undefined)
     }
-    const availableModels = buildAvailableModels(entries, { includeVariants: true })
+    const availableModels = buildAvailableModels(entries)
     const modeState = await this.resolveModeState(directory, sessionId)
     const currentModeId = modeState.currentModeId
     const modes = currentModeId
@@ -1271,13 +1260,15 @@ export class Agent implements ACPAgent {
     return {
       sessionId,
       models: {
-        currentModelId: formatModelIdWithVariant(model, currentVariant, availableVariants, true),
+        currentModelId: formatModelIdWithVariant(model, currentVariant, availableVariants, false),
         availableModels,
       },
       modes,
       configOptions: buildConfigOptions({
-        currentModelId: formatModelIdWithVariant(model, currentVariant, availableVariants, true),
+        currentModelId: formatModelIdWithVariant(model, currentVariant, availableVariants, false),
         availableModels,
+        currentVariant,
+        availableVariants,
         modes,
       }),
       _meta: buildVariantMeta({
@@ -1300,6 +1291,24 @@ export class Agent implements ACPAgent {
 
     const entries = sortProvidersByName(providers)
     const availableVariants = modelVariantsFromProviders(entries, selection.model)
+    const modeState = await this.resolveModeState(session.cwd, session.id)
+    const modes = modeState.currentModeId
+      ? { availableModes: modeState.availableModes, currentModeId: modeState.currentModeId }
+      : undefined
+
+    await this.connection.sessionUpdate({
+      sessionId: session.id,
+      update: {
+        sessionUpdate: "config_option_update",
+        configOptions: buildConfigOptions({
+          currentModelId: formatModelIdWithVariant(selection.model, selection.variant, availableVariants, false),
+          availableModels: buildAvailableModels(entries),
+          currentVariant: selection.variant,
+          availableVariants,
+          modes,
+        }),
+      },
+    })
 
     return {
       _meta: buildVariantMeta({
@@ -1331,6 +1340,14 @@ export class Agent implements ACPAgent {
       const selection = parseModelSelection(params.value, providers)
       this.sessionManager.setModel(session.id, selection.model)
       this.sessionManager.setVariant(session.id, selection.variant)
+    } else if (params.configId === "effort") {
+      if (typeof params.value !== "string") throw RequestError.invalidParams("effort value must be a string")
+      const current = session.model ?? (await defaultModel(this.config, session.cwd))
+      const availableVariants = modelVariantsFromProviders(entries, current)
+      if (!availableVariants.includes(params.value)) {
+        throw RequestError.invalidParams(JSON.stringify({ error: `Effort not found: ${params.value}` }))
+      }
+      this.sessionManager.setVariant(session.id, params.value)
     } else if (params.configId === "mode") {
       if (typeof params.value !== "string") throw RequestError.invalidParams("mode value must be a string")
       const availableModes = await this.loadAvailableModes(session.cwd)
@@ -1345,15 +1362,21 @@ export class Agent implements ACPAgent {
     const updatedSession = this.sessionManager.get(session.id)
     const model = updatedSession.model ?? (await defaultModel(this.config, session.cwd))
     const availableVariants = modelVariantsFromProviders(entries, model)
-    const currentModelId = formatModelIdWithVariant(model, updatedSession.variant, availableVariants, true)
-    const availableModels = buildAvailableModels(entries, { includeVariants: true })
+    const currentModelId = formatModelIdWithVariant(model, updatedSession.variant, availableVariants, false)
+    const availableModels = buildAvailableModels(entries)
     const modeState = await this.resolveModeState(session.cwd, session.id)
     const modes = modeState.currentModeId
       ? { availableModes: modeState.availableModes, currentModeId: modeState.currentModeId }
       : undefined
 
     return {
-      configOptions: buildConfigOptions({ currentModelId, availableModels, modes }),
+      configOptions: buildConfigOptions({
+        currentModelId,
+        availableModels,
+        currentVariant: updatedSession.variant,
+        availableVariants,
+        modes,
+      }),
     }
   }
 
@@ -1550,6 +1573,37 @@ export class Agent implements ACPAgent {
       { throwOnError: true },
     )
   }
+
+  private async loadSessionMessages(directory: string, sessionId: string, limit?: number) {
+    return this.sdk.session
+      .messages(
+        {
+          sessionID: sessionId,
+          directory,
+          limit,
+        },
+        { throwOnError: true },
+      )
+      .then((x) => x.data)
+      .catch((error) => {
+        log.error("unexpected error when fetching message", { error })
+        return undefined
+      })
+  }
+
+  private restoreSessionStateFromMessages(sessionId: string, messages: SessionMessageResponse[] | undefined) {
+    const lastUser = messages?.findLast((message) => message.info.role === "user")?.info
+    if (lastUser?.role !== "user") return
+
+    this.sessionManager.setModel(sessionId, {
+      providerID: ProviderID.make(lastUser.model.providerID),
+      modelID: ModelID.make(lastUser.model.modelID),
+    })
+    this.sessionManager.setVariant(sessionId, lastUser.model.variant)
+    if (lastUser.agent) {
+      this.sessionManager.setMode(sessionId, lastUser.agent)
+    }
+  }
 }
 
 function toToolKind(toolName: string): ToolKind {
@@ -1634,6 +1688,9 @@ async function defaultModel(config: ACPConfig, cwd?: string): Promise<{ provider
   if (specified && !providers.length) return specified
 
   // kilocode_change start
+  const lastUsed = await lastUsedModel(sdk, directory, providers)
+  if (lastUsed) return lastUsed
+
   const kiloProvider = providers.find((p) => p.id === "kilo")
   if (kiloProvider) {
     const [best] = Provider.sort(Object.values(kiloProvider.models))
@@ -1657,7 +1714,7 @@ async function defaultModel(config: ACPConfig, cwd?: string): Promise<{ provider
 
   if (specified) return specified
 
-  // kilocode_change start
+  // kilocode_change start - prefer kilo free-tier default before erroring.
   // Only fall back to the Kilo provider if it was present in the available
   // providers list. When teams configure enabled_providers to use only their
   // own models, this prevents silently routing requests to an external API.
@@ -1667,8 +1724,39 @@ async function defaultModel(config: ACPConfig, cwd?: string): Promise<{ provider
     const freeModel = await fetchDefaultModel()
     return { providerID: ProviderID.kilo, modelID: ModelID.make(freeModel) }
   }
-  throw new Error("no model available: no providers are configured and no default model is set")
   // kilocode_change end
+  throw new Error("No models available")
+}
+
+async function lastUsedModel(
+  sdk: KiloClient,
+  directory: string,
+  providers: Array<{ id: string; models: Record<string, unknown> }>,
+): Promise<{ providerID: ProviderID; modelID: ModelID } | undefined> {
+  const session = await sdk.session
+    .list({ directory, roots: true, limit: 1 }, { throwOnError: true })
+    .then((x) => x.data?.[0])
+    .catch((error) => {
+      log.error("failed to list sessions for default model", { error })
+      return undefined
+    })
+  if (!session) return
+
+  const lastUser = await sdk.session
+    .messages({ sessionID: session.id, directory, limit: 20 }, { throwOnError: true })
+    .then((x) => x.data?.findLast((message) => message.info.role === "user")?.info)
+    .catch((error) => {
+      log.error("failed to load session messages for default model", { error, sessionID: session.id })
+      return undefined
+    })
+  if (lastUser?.role !== "user") return
+
+  const provider = providers.find((entry) => entry.id === lastUser.model.providerID)
+  if (!provider?.models[lastUser.model.modelID]) return
+  return {
+    providerID: ProviderID.make(lastUser.model.providerID),
+    modelID: ModelID.make(lastUser.model.modelID),
+  }
 }
 
 function parseUri(
@@ -1771,8 +1859,14 @@ function formatModelIdWithVariant(
   includeVariant: boolean,
 ) {
   const base = `${model.providerID}/${model.modelID}`
-  if (!includeVariant || !variant || !availableVariants.includes(variant)) return base
-  return `${base}/${variant}`
+  if (!includeVariant || availableVariants.length === 0) return base
+  const selectedVariant =
+    variant && availableVariants.includes(variant)
+      ? variant
+      : availableVariants.includes(DEFAULT_VARIANT_VALUE)
+        ? DEFAULT_VARIANT_VALUE
+        : availableVariants[0]
+  return `${base}/${selectedVariant}`
 }
 
 function buildVariantMeta(input: {
@@ -1824,6 +1918,8 @@ function parseModelSelection(
 function buildConfigOptions(input: {
   currentModelId: string
   availableModels: ModelOption[]
+  currentVariant?: string
+  availableVariants?: string[]
   modes?: { availableModes: ModeOption[]; currentModeId: string } | undefined
 }): SessionConfigOption[] {
   const options: SessionConfigOption[] = [
@@ -1836,6 +1932,22 @@ function buildConfigOptions(input: {
       options: input.availableModels.map((m) => ({ value: m.modelId, name: m.name })),
     },
   ]
+  if (input.availableVariants?.length) {
+    options.push({
+      id: "effort",
+      name: "Effort",
+      description: "Available effort levels for this model",
+      category: "thought_level",
+      type: "select",
+      currentValue:
+        input.currentVariant && input.availableVariants.includes(input.currentVariant)
+          ? input.currentVariant
+          : input.availableVariants.includes(DEFAULT_VARIANT_VALUE)
+            ? DEFAULT_VARIANT_VALUE
+            : input.availableVariants[0],
+      options: input.availableVariants.map((variant) => ({ value: variant, name: formatVariantName(variant) })),
+    })
+  }
   if (input.modes) {
     options.push({
       id: "mode",
@@ -1853,4 +1965,11 @@ function buildConfigOptions(input: {
   return options
 }
 
+function formatVariantName(variant: string) {
+  return variant
+    .split(/[_-]/)
+    .map((part) => (part ? part.charAt(0).toUpperCase() + part.slice(1) : part))
+    .join(" ")
+}
+
 export * as ACP from "./agent"

packages/opencode/src/acp/session.ts

@@ -113,4 +113,10 @@ export class ACPSessionManager {
     this.sessions.set(sessionId, session)
     return session
   }
+
+  remove(sessionId: string): ACPSessionState | undefined {
+    const session = this.sessions.get(sessionId)
+    this.sessions.delete(sessionId)
+    return session
+  }
 }

packages/opencode/src/cli/cmd/acp.ts

@@ -22,7 +22,7 @@ export const AcpCommand = effectCmd({
   },
   handler: Effect.fn("Cli.acp")(function* (args) {
     process.env.KILO_CLIENT = "acp"
-    const opts = yield* Effect.promise(() => resolveNetworkOptions(args))
+    const opts = yield* resolveNetworkOptions(args)
     const server = yield* Effect.promise(() => Server.listen(opts))
 
     const sdk = createKiloClient({

packages/opencode/src/cli/cmd/agent.ts

@@ -84,7 +84,7 @@ const AgentCreateCommand = effectCmd({
       // Determine scope/path
       let targetPath: string
       if (cliPath) {
-        targetPath = path.join(cliPath, "agent")
+        targetPath = path.join(cliPath, "agents")
       } else {
         let scope: "global" | "project" = "global"
         if (project.vcs === "git") {
@@ -108,7 +108,7 @@ const AgentCreateCommand = effectCmd({
         }
         targetPath = path.join(
           scope === "global" ? Global.Path.config : path.join(ctx.worktree, ".kilo"), // kilocode_change
-          "agent",
+          "agents",
         )
       }
 

packages/opencode/src/cli/cmd/serve.ts

@@ -16,7 +16,7 @@ export const ServeCommand = effectCmd({
     if (!Flag.KILO_SERVER_PASSWORD) {
       console.log("Warning: KILO_SERVER_PASSWORD is not set; server is unsecured.")
     }
-    const opts = yield* Effect.promise(() => resolveNetworkOptions(args))
+    const opts = yield* resolveNetworkOptions(args)
     const server = yield* Effect.promise(() => Server.listen(opts))
     console.log(`kilo server listening on http://${server.hostname}:${server.port}`) // kilocode_change
 

packages/opencode/src/cli/cmd/session.ts

@@ -9,6 +9,7 @@ import { Locale } from "@/util/locale"
 import { Flag } from "@opencode-ai/core/flag/flag"
 import { Filesystem } from "@/util/filesystem"
 import { Process } from "@/util/process"
+import { NotFoundError } from "@/storage/storage"
 import { EOL } from "os"
 import path from "path"
 import { which } from "../../util/which"
@@ -59,9 +60,9 @@ export const SessionDeleteCommand = effectCmd({
   handler: Effect.fn("Cli.session.delete")(function* (args) {
     const svc = yield* Session.Service
     const sessionID = SessionID.make(args.sessionID)
-    // Match legacy try/catch — Session.get surfaces NotFoundError as a defect.
-    yield* svc.get(sessionID).pipe(Effect.catchCause(() => fail(`Session not found: ${args.sessionID}`)))
-    yield* svc.remove(sessionID)
+    yield* svc
+      .remove(sessionID)
+      .pipe(Effect.catchIf(NotFoundError.isInstance, () => fail(`Session not found: ${args.sessionID}`)))
     UI.println(UI.Style.TEXT_SUCCESS_BOLD + `Session ${args.sessionID} deleted` + UI.Style.TEXT_NORMAL)
   }),
 })

packages/opencode/src/cli/cmd/tui/component/dialog-provider.tsx

@@ -19,6 +19,60 @@ import { useConnected } from "./use-connected"
 
 const PROVIDER_PRIORITY: Record<string, number> = KiloProvider.PROVIDER_PRIORITY // kilocode_change
 
+const CUSTOM_PROVIDER_OPTION_VALUE = "__opencode_custom_provider__"
+const CUSTOM_PROVIDER_ID = /^[a-z0-9][a-z0-9-_]*$/
+
+type ProviderOptionBase = {
+  title: string
+  value: string
+  description?: string
+  category: string
+}
+
+type ProviderOption =
+  | (ProviderOptionBase & {
+      type: "provider"
+      providerID: string
+    })
+  | (ProviderOptionBase & {
+      type: "custom"
+    })
+
+export function providerOptions(list: { id: string; name: string }[]): ProviderOption[] {
+  return [
+    ...pipe(
+      list,
+      sortBy((x) => PROVIDER_PRIORITY[x.id] ?? 99),
+      map((provider) => ({
+        type: "provider" as const,
+        title: provider.name,
+        value: provider.id,
+        providerID: provider.id,
+        description: {
+          opencode: "(Recommended)",
+          anthropic: "(API key)",
+          openai: "(ChatGPT Plus/Pro or API key)",
+          "opencode-go": "Low cost subscription for everyone",
+        }[provider.id],
+        category: provider.id in PROVIDER_PRIORITY ? "Popular" : "Providers",
+      })),
+    ),
+    {
+      type: "custom",
+      title: "Other",
+      value: CUSTOM_PROVIDER_OPTION_VALUE,
+      description: "Custom provider",
+      category: "Providers",
+    },
+  ]
+}
+
+export function normalizeCustomProviderID(value: string) {
+  const providerID = value.trim().replace(/^@ai-sdk\//, "")
+  if (!CUSTOM_PROVIDER_ID.test(providerID)) return
+  return providerID
+}
+
 export function createDialogProviderOptions() {
   const sync = useSync()
   const dialog = useDialog()
@@ -26,13 +80,50 @@ export function createDialogProviderOptions() {
   const toast = useToast()
   const { theme } = useTheme()
   const onboarded = useConnected()
+
+  async function promptCustomProviderID(): Promise<string | undefined> {
+    const value = await DialogPrompt.show(dialog, "Other", {
+      placeholder: "Provider id",
+      description: () => (
+        <text fg={theme.textMuted}>
+          This only stores a credential. Configure the provider in opencode.json to use it.
+        </text>
+      ),
+    })
+    if (value === null) return
+
+    const providerID = normalizeCustomProviderID(value)
+    if (providerID) return providerID
+
+    toast.show({
+      variant: "error",
+      message:
+        "Provider ids must start with a lowercase letter or number and only use lowercase letters, numbers, hyphens, and underscores",
+    })
+    return promptCustomProviderID()
+  }
+
   const options = createMemo(() => {
     return pipe(
-      sync.data.provider_next.all,
-      sortBy((x) => PROVIDER_PRIORITY[x.id] ?? 99),
+      providerOptions(sync.data.provider_next.all),
       map((provider) => {
-        const consoleManaged = isConsoleManagedProvider(sync.data.console_state.consoleManagedProviders, provider.id)
-        const connected = sync.data.provider_next.connected.includes(provider.id)
+        if (provider.type === "custom") {
+          return {
+            title: provider.title,
+            value: provider.value,
+            description: provider.description,
+            category: provider.category,
+            async onSelect() {
+              const providerID = await promptCustomProviderID()
+              if (!providerID) return
+              return dialog.replace(() => <ApiMethod providerID={providerID} title="API key" custom />)
+            },
+          }
+        }
+
+        const providerID = provider.providerID
+        const consoleManaged = isConsoleManagedProvider(sync.data.console_state.consoleManagedProviders, providerID)
+        const connected = sync.data.provider_next.connected.includes(providerID)
         // kilocode_change start
         const failed = sync.data.provider_next.failed ?? []
         const failedGutter = KiloProvider.renderGutter(provider.id, failed, theme)
@@ -41,16 +132,16 @@ export function createDialogProviderOptions() {
         // kilocode_change end
 
         return {
-          title: KiloProvider.PROVIDER_TITLES[provider.id] ?? provider.name, // kilocode_change
-          value: provider.id,
-          description: failedDesc ?? baseDesc, // kilocode_change
+          title: KiloProvider.PROVIDER_TITLES[provider.id] ?? provider.title, // kilocode_change
+          value: provider.value,
+          description: failedDesc ?? baseDesc ?? provider.description, // kilocode_change
           footer: consoleManaged ? sync.data.console_state.activeOrgName : undefined,
-          category: provider.id in PROVIDER_PRIORITY ? "Popular" : "Other",
+          category: provider.category,
           gutter: failedGutter ?? (connected && onboarded() ? () => <text fg={theme.success}>✓</text> : undefined), // kilocode_change
           async onSelect() {
             if (consoleManaged) return
 
-            const methods = sync.data.provider_auth[provider.id] ?? [
+            const methods = sync.data.provider_auth[providerID] ?? [
               {
                 type: "api",
                 label: "API key",
@@ -88,7 +179,7 @@ export function createDialogProviderOptions() {
               }
 
               const result = await sdk.client.provider.oauth.authorize({
-                providerID: provider.id,
+                providerID,
                 method: index,
                 inputs,
               })
@@ -102,12 +193,7 @@ export function createDialogProviderOptions() {
               }
               if (result.data?.method === "code") {
                 dialog.replace(() => (
-                  <CodeMethod
-                    providerID={provider.id}
-                    title={method.label}
-                    index={index}
-                    authorization={result.data!}
-                  />
+                  <CodeMethod providerID={providerID} title={method.label} index={index} authorization={result.data!} />
                 ))
               }
               if (result.data?.method === "auto") {
@@ -126,12 +212,7 @@ export function createDialogProviderOptions() {
                 } else {
                   // kilocode_change end
                   dialog.replace(() => (
-                    <AutoMethod
-                      providerID={provider.id}
-                      title={method.label}
-                      index={index}
-                      authorization={result.data!}
-                    />
+                    <AutoMethod providerID={providerID} title={method.label} index={index} authorization={result.data!} />
                   ))
                 } // kilocode_change
               }
@@ -144,7 +225,7 @@ export function createDialogProviderOptions() {
                 metadata = value
               }
               return dialog.replace(() => (
-                <ApiMethod providerID={provider.id} title={method.label} metadata={metadata} />
+                <ApiMethod providerID={providerID} title={method.label} metadata={metadata} />
               ))
             }
           },
@@ -266,11 +347,13 @@ interface ApiMethodProps {
   providerID: string
   title: string
   metadata?: Record<string, string>
+  custom?: boolean
 }
 function ApiMethod(props: ApiMethodProps) {
   const dialog = useDialog()
   const sdk = useSDK()
   const sync = useSync()
+  const toast = useToast()
   const { theme } = useTheme()
 
   return (
@@ -290,6 +373,14 @@ function ApiMethod(props: ApiMethodProps) {
         })
         await sdk.client.instance.dispose()
         await sync.bootstrap()
+        if (props.custom && !sync.data.provider_next.all.some((provider) => provider.id === props.providerID)) {
+          toast.show({
+            variant: "info",
+            message: `Saved credential for ${props.providerID}. Configure it in opencode.json to use it.`,
+          })
+          dialog.clear()
+          return
+        }
         dialog.replace(() => <DialogModel providerID={props.providerID} />)
       }}
     />

packages/opencode/src/cli/cmd/tui/component/dialog-session-list.tsx

@@ -2,7 +2,7 @@ import { useDialog } from "@tui/ui/dialog"
 import { DialogSelect } from "@tui/ui/dialog-select"
 import { useRoute } from "@tui/context/route"
 import { useSync } from "@tui/context/sync"
-import { createMemo, createResource, createSignal, onMount } from "solid-js"
+import { createMemo, createResource, createSignal, onMount, type JSX } from "solid-js"
 import { Locale } from "@/util/locale"
 import { useProject } from "@tui/context/project"
 import { useKeybind } from "../context/keybind"
@@ -10,16 +10,14 @@ import { useTheme } from "../context/theme"
 import { useSDK } from "../context/sdk"
 import { Flag } from "@opencode-ai/core/flag/flag"
 import { DialogSessionRename } from "./dialog-session-rename"
-import { Keybind } from "@/util/keybind"
 import { createDebouncedSignal } from "../util/signal"
 import { useToast } from "../ui/toast"
-import { DialogWorkspaceCreate, openWorkspaceSession, restoreWorkspaceSession } from "./dialog-workspace-create"
+import { openWorkspaceSelect, type WorkspaceSelection, warpWorkspaceSession } from "./dialog-workspace-create"
 import { Spinner } from "./spinner"
 import path from "path" // kilocode_change
 import { errorMessage } from "@/util/error"
 import { DialogSessionDeleteFailed } from "./dialog-session-delete-failed"
-
-type WorkspaceStatus = "connected" | "connecting" | "disconnected" | "error"
+import { WorkspaceLabel } from "./workspace-label"
 
 export function DialogSessionList() {
   const dialog = useDialog()
@@ -67,26 +65,41 @@ export function DialogSessionList() {
   })
   // kilocode_change end
 
-  function createWorkspace() {
-    dialog.replace(() => (
-      <DialogWorkspaceCreate
-        onSelect={(workspaceID) =>
-          openWorkspaceSession({
-            dialog,
-            route,
-            sdk,
-            sync,
-            toast,
-            workspaceID,
-          })
-        }
-      />
-    ))
-  }
-
   function recover(session: NonNullable<ReturnType<typeof sessions>[number]>) {
     const workspace = project.workspace.get(session.workspaceID!)
     const list = () => dialog.replace(() => <DialogSessionList />)
+    const warp = async (selection: WorkspaceSelection) => {
+      const workspaceID = await (async () => {
+        if (selection.type === "none") return null
+        if (selection.type === "existing") return selection.workspaceID
+        const result = await sdk.client.experimental.workspace
+          .create({ type: selection.workspaceType, branch: null })
+          .catch(() => undefined)
+        const workspace = result?.data
+        if (!workspace) {
+          toast.show({
+            message: `Failed to create workspace: ${errorMessage(result?.error ?? "no response")}`,
+            variant: "error",
+          })
+          return
+        }
+        await project.workspace.sync()
+        return workspace.id
+      })()
+      if (workspaceID === undefined) return
+      await warpWorkspaceSession({
+        dialog,
+        sdk,
+        sync,
+        project,
+        toast,
+        sourceWorkspaceID: session.workspaceID,
+        workspaceID,
+        sessionID: session.id,
+        copyChanges: false,
+        done: list,
+      })
+    }
     dialog.replace(() => (
       <DialogSessionDeleteFailed
         session={session.title}
@@ -113,22 +126,15 @@ export function DialogSessionList() {
           return true
         }}
         onRestore={() => {
-          dialog.replace(() => (
-            <DialogWorkspaceCreate
-              onSelect={(workspaceID) =>
-                restoreWorkspaceSession({
-                  dialog,
-                  sdk,
-                  sync,
-                  project,
-                  toast,
-                  workspaceID,
-                  sessionID: session.id,
-                  done: list,
-                })
-              }
-            />
-          ))
+          void openWorkspaceSelect({
+            dialog,
+            sdk,
+            sync,
+            toast,
+            onSelect: (selection) => {
+              void warp(selection)
+            },
+          })
           return false
         }}
       />
@@ -148,30 +154,17 @@ export function DialogSessionList() {
       .map((x) => {
         const workspace = x.workspaceID ? project.workspace.get(x.workspaceID) : undefined
 
-        let workspaceStatus: WorkspaceStatus | null = null
-        if (x.workspaceID) {
-          workspaceStatus = project.workspace.status(x.workspaceID) || "error"
-        }
-
-        let footer = ""
+        let footer: JSX.Element | string = ""
         if (Flag.KILO_EXPERIMENTAL_WORKSPACES) {
           if (x.workspaceID) {
-            let desc = "unknown"
-            if (workspace) {
-              desc = `${workspace.type}: ${workspace.name}`
-            }
-
-            footer = (
-              <>
-                {desc}{" "}
-                <span
-                  style={{
-                    fg: workspaceStatus === "connected" ? theme.success : theme.error,
-                  }}
-                >
-                  ●
-                </span>
-              </>
+            footer = workspace ? (
+              <WorkspaceLabel
+                type={workspace.type}
+                name={workspace.name}
+                status={project.workspace.status(x.workspaceID) ?? "error"}
+              />
+            ) : (
+              <WorkspaceLabel type="unknown" name={x.workspaceID} status="error" />
             )
           }
         } else {
@@ -294,15 +287,6 @@ export function DialogSessionList() {
           },
         },
         // kilocode_change end
-        {
-          keybind: Keybind.parse("ctrl+w")[0],
-          title: "new workspace",
-          side: "right",
-          disabled: !Flag.KILO_EXPERIMENTAL_WORKSPACES,
-          onTrigger: () => {
-            createWorkspace()
-          },
-        },
       ]}
     />
   )

packages/opencode/src/cli/cmd/tui/component/dialog-workspace-create.tsx

@@ -1,14 +1,15 @@
-import { createKiloClient } from "@kilocode/sdk/v2"
+import type { Workspace } from "@kilocode/sdk/v2"
 import { useDialog } from "@tui/ui/dialog"
-import { DialogSelect } from "@tui/ui/dialog-select"
-import { useRoute } from "@tui/context/route"
+import { DialogSelect, type DialogSelectOption } from "@tui/ui/dialog-select"
 import { useSync } from "@tui/context/sync"
 import { useProject } from "@tui/context/project"
+import { useRoute } from "@tui/context/route"
 import { createMemo, createSignal, onMount } from "solid-js"
-import { setTimeout as sleep } from "node:timers/promises"
 import { errorMessage } from "@/util/error"
 import { useSDK } from "../context/sdk"
 import { useToast } from "../ui/toast"
+import { DialogAlert } from "../ui/dialog-alert"
+import { DialogWorkspaceFileChanges } from "./dialog-workspace-file-changes"
 
 type Adapter = {
   type: string
@@ -16,184 +17,290 @@ type Adapter = {
   description: string
 }
 
-function scoped(sdk: ReturnType<typeof useSDK>, sync: ReturnType<typeof useSync>, workspaceID: string) {
-  return createKiloClient({
-    baseUrl: sdk.url,
-    fetch: sdk.fetch,
-    directory: sync.path.directory || sdk.directory,
-    experimental_workspaceID: workspaceID,
-  })
+export type WorkspaceSelection =
+  | {
+      type: "none"
+    }
+  | {
+      type: "new"
+      workspaceType: string
+      workspaceName: string
+    }
+  | {
+      type: "existing"
+      workspaceID: string
+      workspaceType: string
+      workspaceName: string
+    }
+
+type WorkspaceSelectValue = WorkspaceSelection | { type: "existing-list" }
+type ExistingWorkspaceSelectValue = { workspace: Workspace }
+
+export function recentConnectedWorkspaces<WorkspaceInfo extends { id: string }>(input: {
+  sessions: readonly { workspaceID?: string; time: { updated: number } }[]
+  get: (workspaceID: string) => WorkspaceInfo | undefined
+  status: (workspaceID: string) => string | undefined
+  limit?: number
+  omitWorkspaceID?: string
+}) {
+  const workspaces = input.sessions
+    .toSorted((a, b) => b.time.updated - a.time.updated)
+    .flatMap((session) => {
+      const workspace = session.workspaceID ? input.get(session.workspaceID) : undefined
+      return workspace && input.status(workspace.id) === "connected" ? [workspace] : []
+    })
+    .filter((workspace) => workspace.id !== input.omitWorkspaceID)
+    .filter((workspace, index, list) => list.findIndex((item) => item.id === workspace.id) === index)
+  const recent = workspaces.slice(0, input.limit ?? 3)
+
+  return { recent, hasMore: recent.length < workspaces.length }
 }
 
-export async function openWorkspaceSession(input: {
-  dialog: ReturnType<typeof useDialog>
-  route: ReturnType<typeof useRoute>
+export function warpReminderText(dir: string) {
+  return `<system-reminder>The user has changed the current working directory to "${dir}". This is still the same project but at a possibly new location; take this into account when working with any files from now on.</system-reminder>`
+}
+
+async function loadWorkspaceAdapters(input: {
   sdk: ReturnType<typeof useSDK>
   sync: ReturnType<typeof useSync>
   toast: ReturnType<typeof useToast>
-  workspaceID: string
 }) {
-  const client = scoped(input.sdk, input.sync, input.workspaceID)
-
-  while (true) {
-    const result = await client.session.create({ workspace: input.workspaceID }).catch(() => undefined)
-    if (!result) {
-      input.toast.show({
-        message: "Failed to create workspace session",
-        variant: "error",
-      })
-      return
-    }
-    if (result.response?.status && result.response.status >= 500 && result.response.status < 600) {
-      await sleep(1000)
-      continue
-    }
-    if (!result.data) {
-      input.toast.show({
-        message: "Failed to create workspace session",
-        variant: "error",
-      })
-      return
-    }
-
-    input.route.navigate({
-      type: "session",
-      sessionID: result.data.id,
-    })
-    input.dialog.clear()
-    return
-  }
+  const dir = input.sync.path.directory || input.sdk.directory
+  const url = new URL("/experimental/workspace/adapter", input.sdk.url)
+  if (dir) url.searchParams.set("directory", dir)
+  const res = await input.sdk
+    .fetch(url)
+    .then((x) => x.json() as Promise<Adapter[]>)
+    .catch(() => undefined)
+  if (res) return res
+  input.toast.show({
+    message: "Failed to load workspace adapters",
+    variant: "error",
+  })
 }
 
-export async function restoreWorkspaceSession(input: {
+export async function openWorkspaceSelect(input: {
+  dialog: ReturnType<typeof useDialog>
+  sdk: ReturnType<typeof useSDK>
+  sync: ReturnType<typeof useSync>
+  toast: ReturnType<typeof useToast>
+  onSelect: (selection: WorkspaceSelection) => Promise<void> | void
+}) {
+  input.dialog.clear()
+  const adapters = await loadWorkspaceAdapters(input)
+  if (!adapters) return
+  input.dialog.replace(() => <DialogWorkspaceSelect adapters={adapters} onSelect={input.onSelect} />)
+}
+
+export async function warpWorkspaceSession(input: {
   dialog: ReturnType<typeof useDialog>
   sdk: ReturnType<typeof useSDK>
   sync: ReturnType<typeof useSync>
   project: ReturnType<typeof useProject>
   toast: ReturnType<typeof useToast>
-  workspaceID: string
+  sourceWorkspaceID?: string
+  workspaceID: string | null
   sessionID: string
+  copyChanges: boolean
   done?: () => void
-}) {
+}): Promise<boolean> {
   const result = await input.sdk.client.experimental.workspace
-    .sessionRestore({ id: input.workspaceID, sessionID: input.sessionID })
+    .warp({
+      id: input.workspaceID,
+      sessionID: input.sessionID,
+      copyChanges: input.copyChanges,
+    })
     .catch(() => undefined)
   if (!result?.data) {
+    if (result?.error?.name === "VcsApplyError") {
+      await DialogAlert.show(
+        input.dialog,
+        "Unable to Warp Session",
+        "Unable to apply file changes to this workspace. It has existing changes that conflict or is based off a different branch. Session has not been warped.",
+      )
+      return false
+    }
+
     input.toast.show({
-      message: `Failed to restore session: ${errorMessage(result?.error ?? "no response")}`,
+      message: `Failed to warp session: ${errorMessage(result?.error ?? "no response")}`,
       variant: "error",
     })
-    return
+    return false
   }
 
   input.project.workspace.set(input.workspaceID)
 
   await input.sync.bootstrap({ fatal: false }).catch(() => undefined)
 
-  await Promise.all([input.project.workspace.sync(), input.sync.session.sync(input.sessionID)])
+  const dir = input.project.instance.directory() || input.sync.path.directory
+  if (dir) {
+    await input.sdk.client.session
+      .promptAsync({
+        sessionID: input.sessionID,
+        workspace: input.workspaceID ?? undefined,
+        noReply: true,
+        parts: [
+          {
+            type: "text",
+            text: warpReminderText(dir),
+            synthetic: true,
+          },
+        ],
+      })
+      .catch(() => undefined)
+  }
 
-  input.toast.show({
-    message: "Session restored into the new workspace",
-    variant: "success",
-  })
-  input.done?.()
-  if (input.done) return
+  await Promise.all([input.project.workspace.sync(), input.sync.session.refresh()])
+
+  if (input.done) {
+    input.done()
+    return true
+  }
   input.dialog.clear()
+  return true
 }
 
-export function DialogWorkspaceCreate(props: { onSelect: (workspaceID: string) => Promise<void> | void }) {
+export async function confirmWorkspaceFileChanges(input: {
+  dialog: ReturnType<typeof useDialog>
+  sdk: ReturnType<typeof useSDK>
+  sourceWorkspaceID?: string
+}) {
+  const status = await input.sdk.client.vcs.status({ workspace: input.sourceWorkspaceID }).catch(() => undefined)
+  const fileChangeChoice = status?.data?.length
+    ? await DialogWorkspaceFileChanges.show(input.dialog, status.data)
+    : "no"
+  if (!fileChangeChoice) return
+  return fileChangeChoice === "yes"
+}
+
+export function DialogWorkspaceSelect(props: {
+  adapters?: Adapter[]
+  onSelect: (selection: WorkspaceSelection) => Promise<void> | void
+}) {
   const dialog = useDialog()
-  const sync = useSync()
   const project = useProject()
+  const route = useRoute()
+  const sync = useSync()
   const sdk = useSDK()
   const toast = useToast()
-  const [creating, setCreating] = createSignal<string>()
-  const [adapters, setAdapters] = createSignal<Adapter[]>()
+  const [adapters, setAdapters] = createSignal<Adapter[] | undefined>(props.adapters)
+  const omittedWorkspaceID = createMemo(() => (route.data.type === "session" ? project.workspace.current() : undefined))
 
   onMount(() => {
     dialog.setSize("medium")
     void (async () => {
-      const dir = sync.path.directory || sdk.directory
-      const url = new URL("/experimental/workspace/adapter", sdk.url)
-      if (dir) url.searchParams.set("directory", dir)
-      const res = await sdk
-        .fetch(url)
-        .then((x) => x.json() as Promise<Adapter[]>)
-        .catch(() => undefined)
-      if (!res) {
-        toast.show({
-          message: "Failed to load workspace adapters",
-          variant: "error",
-        })
-        return
-      }
+      if (adapters()) return
+      const res = await loadWorkspaceAdapters({ sdk, sync, toast })
+      if (!res) return
       setAdapters(res)
     })()
   })
 
-  const options = createMemo(() => {
-    const type = creating()
-    if (type) {
-      return [
-        {
-          title: `Creating ${type} workspace...`,
-          value: "creating" as const,
-          description: "This can take a while for remote environments",
-        },
-      ]
-    }
+  const options = createMemo<DialogSelectOption<WorkspaceSelectValue>[]>(() => {
     const list = adapters()
-    if (!list) {
-      return [
-        {
-          title: "Loading workspaces...",
-          value: "loading" as const,
-          description: "Fetching available workspace adapters",
+    if (!list) return []
+    const { recent, hasMore } = recentConnectedWorkspaces({
+      sessions: sync.data.session,
+      get: project.workspace.get,
+      status: project.workspace.status,
+      omitWorkspaceID: omittedWorkspaceID(),
+    })
+    return [
+      ...list.map((adapter) => ({
+        title: adapter.name,
+        value: { type: "new" as const, workspaceType: adapter.type, workspaceName: adapter.name },
+        description: adapter.description,
+        category: "New workspace",
+      })),
+      {
+        title: "None",
+        value: { type: "none" as const },
+        description: "Use the local project",
+        category: "Choose workspace",
+      },
+      ...recent.map((workspace: Workspace) => ({
+        title: workspace.name,
+        description: `(${workspace.type})`,
+        value: {
+          type: "existing" as const,
+          workspaceID: workspace.id,
+          workspaceType: workspace.type,
+          workspaceName: workspace.name,
         },
-      ]
-    }
-    return list.map((item) => ({
-      title: item.name,
-      value: item.type,
-      description: item.description,
-    }))
+        category: "Choose workspace",
+      })),
+      ...(hasMore
+        ? [
+            {
+              title: "View all workspaces",
+              value: { type: "existing-list" as const },
+              description: "Choose from all workspaces",
+              category: "Choose workspace",
+            },
+          ]
+        : []),
+    ]
   })
 
-  const create = async (type: string) => {
-    if (creating()) return
-    setCreating(type)
-
-    const result = await sdk.client.experimental.workspace.create({ type, branch: null }).catch(() => {
-      toast.show({
-        message: "Creating workspace failed",
-        variant: "error",
-      })
-      return undefined
-    })
-
-    const workspace = result?.data
-    if (!workspace) {
-      setCreating(undefined)
-      toast.show({
-        message: `Failed to create workspace: ${errorMessage(result?.error ?? "no response")}`,
-        variant: "error",
-      })
-      return
-    }
-
-    await project.workspace.sync()
-    await props.onSelect(workspace.id)
-    setCreating(undefined)
-  }
-
+  if (!adapters()) return null
   return (
-    <DialogSelect
-      title={creating() ? "Creating Workspace" : "New Workspace"}
+    <DialogSelect<WorkspaceSelectValue>
+      title="Warp"
       skipFilter={true}
+      renderFilter={false}
       options={options()}
       onSelect={(option) => {
-        if (option.value === "creating" || option.value === "loading") return
-        void create(option.value)
+        if (!option.value) return
+        if (option.value.type === "none") {
+          void props.onSelect(option.value)
+          return
+        }
+        if (option.value.type === "new") {
+          void props.onSelect(option.value)
+          return
+        }
+        if (option.value.type === "existing") {
+          void props.onSelect(option.value)
+          return
+        }
+
+        dialog.replace(() => (
+          <DialogExistingWorkspaceSelect omitWorkspaceID={omittedWorkspaceID()} onSelect={props.onSelect} />
+        ))
+      }}
+    />
+  )
+}
+
+function DialogExistingWorkspaceSelect(props: {
+  omitWorkspaceID?: string
+  onSelect: (selection: WorkspaceSelection) => Promise<void> | void
+}) {
+  const project = useProject()
+
+  const options = createMemo<DialogSelectOption<ExistingWorkspaceSelectValue>[]>(() =>
+    project.workspace
+      .list()
+      .filter((workspace) => project.workspace.status(workspace.id) === "connected")
+      .filter((workspace) => workspace.id !== props.omitWorkspaceID)
+      .map((workspace: Workspace) => ({
+        title: workspace.name,
+        description: `(${workspace.type})`,
+        value: { workspace },
+      })),
+  )
+
+  return (
+    <DialogSelect<ExistingWorkspaceSelectValue>
+      title="Existing Workspace"
+      options={options()}
+      onSelect={(option) => {
+        void props.onSelect({
+          type: "existing",
+          workspaceID: option.value.workspace.id,
+          workspaceType: option.value.workspace.type,
+          workspaceName: option.value.workspace.name,
+        })
       }}
     />
   )

packages/opencode/src/cli/cmd/tui/component/dialog-workspace-file-changes.tsx

@@ -0,0 +1,138 @@
+import { TextAttributes } from "@opentui/core"
+import { useKeyboard } from "@opentui/solid"
+import type { VcsFileStatus } from "@kilocode/sdk/v2"
+import { createMemo, For } from "solid-js"
+import { createStore } from "solid-js/store"
+import { Locale } from "@/util/locale"
+import { useTheme } from "../context/theme"
+import { useTuiConfig } from "../context/tui-config"
+import { useDialog, type DialogContext } from "../ui/dialog"
+import { getScrollAcceleration } from "../util/scroll"
+
+const options = ["no", "yes"] as const
+
+export type WorkspaceFileChangesChoice = (typeof options)[number]
+
+function statusLabel(status: VcsFileStatus["status"]) {
+  if (status === "added") return "A"
+  if (status === "deleted") return "D"
+  return "M"
+}
+
+function changeCountWidth(file: VcsFileStatus) {
+  // The "plus 2" is for spaces
+  return `${file.additions ? `+${file.additions}` : ""}${file.deletions ? ` -${file.deletions}` : ""}`.length + 2
+}
+
+export function DialogWorkspaceFileChanges(props: {
+  files: VcsFileStatus[]
+  onSelect: (choice: WorkspaceFileChangesChoice) => void
+}) {
+  const dialog = useDialog()
+  const { theme } = useTheme()
+  const tuiConfig = useTuiConfig()
+  const scrollAcceleration = createMemo(() => getScrollAcceleration(tuiConfig))
+  const [store, setStore] = createStore({ active: "yes" as WorkspaceFileChangesChoice })
+  const height = createMemo(() => Math.min(props.files.length, 8))
+  const fileNameWidth = createMemo(() => 48 - Math.max(Math.max(7, ...props.files.map(changeCountWidth)) - 7, 0))
+
+  function confirm() {
+    props.onSelect(store.active)
+    dialog.clear()
+  }
+
+  useKeyboard((evt) => {
+    if (evt.name === "return") {
+      evt.preventDefault()
+      evt.stopPropagation()
+      confirm()
+      return
+    }
+    if (evt.name === "left") {
+      evt.preventDefault()
+      evt.stopPropagation()
+      const index = options.indexOf(store.active)
+      setStore("active", options[Math.max(index - 1, 0)])
+      return
+    }
+    if (evt.name === "right") {
+      evt.preventDefault()
+      evt.stopPropagation()
+      const index = options.indexOf(store.active)
+      setStore("active", options[Math.min(index + 1, options.length - 1)])
+    }
+  })
+
+  return (
+    <box gap={1}>
+      <box flexDirection="row" justifyContent="space-between" paddingLeft={2} paddingRight={2}>
+        <text attributes={TextAttributes.BOLD} fg={theme.text}>
+          File Changes Found
+        </text>
+        <text fg={theme.textMuted} onMouseUp={() => dialog.clear()}>
+          esc
+        </text>
+      </box>
+      <scrollbox
+        height={height()}
+        backgroundColor={theme.backgroundElement}
+        scrollbarOptions={{ visible: false }}
+        scrollAcceleration={scrollAcceleration()}
+      >
+        <For each={props.files}>
+          {(item) => (
+            <box flexDirection="row" justifyContent="space-between" paddingLeft={2} paddingRight={2}>
+              <box flexDirection="row" minWidth={0} flexShrink={1}>
+                <box width={2} flexShrink={0}>
+                  <text fg={theme.textMuted}>{statusLabel(item.status)}</text>
+                </box>
+                <text fg={theme.textMuted} wrapMode="none">
+                  {Locale.truncateLeft(item.file, fileNameWidth())}
+                </text>
+              </box>
+              <box flexDirection="row" gap={1} minWidth={7} flexShrink={0} justifyContent="flex-end">
+                <text>
+                  {" "}
+                  {item.additions ? <span style={{ fg: theme.diffAdded }}>+{item.additions}</span> : null}
+                  {item.deletions ? <span style={{ fg: theme.diffRemoved }}> -{item.deletions}</span> : null}
+                </text>
+              </box>
+            </box>
+          )}
+        </For>
+      </scrollbox>
+      <box paddingLeft={2} paddingRight={2}>
+        <text fg={theme.textMuted} wrapMode="word">
+          Do you want to apply these changes after warping?
+        </text>
+      </box>
+      <box flexDirection="row" justifyContent="flex-end" paddingLeft={2} paddingRight={2} paddingBottom={1}>
+        <For each={options}>
+          {(item) => (
+            <box
+              paddingLeft={2}
+              paddingRight={2}
+              backgroundColor={item === store.active ? theme.primary : undefined}
+              onMouseUp={() => {
+                setStore("active", item)
+                props.onSelect(item)
+                dialog.clear()
+              }}
+            >
+              <text fg={item === store.active ? theme.selectedListItemText : theme.textMuted}>{item}</text>
+            </box>
+          )}
+        </For>
+      </box>
+    </box>
+  )
+}
+
+DialogWorkspaceFileChanges.show = (dialog: DialogContext, files: VcsFileStatus[]) => {
+  return new Promise<WorkspaceFileChangesChoice | undefined>((resolve) => {
+    dialog.replace(
+      () => <DialogWorkspaceFileChanges files={files} onSelect={resolve} />,
+      () => resolve(undefined),
+    )
+  })
+}

packages/opencode/src/cli/cmd/tui/component/prompt/index.tsx

@@ -7,6 +7,7 @@ import { Filesystem } from "@/util/filesystem"
 import { useLocal } from "@tui/context/local"
 import { tint, useTheme } from "@tui/context/theme"
 import { EmptyBorder, SplitBorder } from "@tui/component/border"
+import { Spinner } from "@tui/component/spinner"
 import { useSDK } from "@tui/context/sdk"
 import { useRoute } from "@tui/context/route"
 import { useProject } from "@tui/context/project"
@@ -41,10 +42,17 @@ import { useKV } from "../../context/kv"
 import { createFadeIn } from "../../util/signal"
 import { useTextareaKeybindings } from "../textarea-keybindings"
 import { DialogSkill } from "../dialog-skill"
-import { DialogWorkspaceCreate, restoreWorkspaceSession } from "../dialog-workspace-create"
+import {
+  confirmWorkspaceFileChanges,
+  openWorkspaceSelect,
+  warpWorkspaceSession,
+  type WorkspaceSelection,
+} from "../dialog-workspace-create"
 import { DialogWorkspaceUnavailable } from "../dialog-workspace-unavailable"
 import { useArgs } from "@tui/context/args"
 import { KiloSessionTuiSync } from "@/kilocode/session/tui-sync" // kilocode_change
+import { Flag } from "@opencode-ai/core/flag/flag"
+import { WorkspaceLabel, type WorkspaceStatus } from "../workspace-label"
 
 export type PromptProps = {
   sessionID?: string
@@ -171,11 +179,99 @@ export function Prompt(props: PromptProps) {
     if (!file) return
     return Locale.truncateMiddle(file, Math.max(12, Math.min(48, Math.floor(dimensions().width / 3))))
   })
-  const [editorContextHover, setEditorContextHover] = createSignal(false)
-  let lastSubmittedEditorSelectionKey: string | undefined
+  const editorContextLabelState = createMemo(() => editor.labelState())
   const [auto, setAuto] = createSignal<AutocompleteRef>()
+  const [workspaceSelection, setWorkspaceSelection] = createSignal<WorkspaceSelection>()
+  const [workspaceCreating, setWorkspaceCreating] = createSignal(false)
+  const [workspaceCreatingDots, setWorkspaceCreatingDots] = createSignal(3)
+  const [warpNotice, setWarpNotice] = createSignal<string>()
   const currentProviderLabel = createMemo(() => local.model.parsed().provider)
   const hasRightContent = createMemo(() => Boolean(props.right))
+  const defaultWorkspaceID = createMemo(() => props.workspaceID ?? project.workspace.current())
+
+  function selectWorkspace(selection: WorkspaceSelection | undefined) {
+    setWorkspaceSelection(selection)
+  }
+
+  function setCreatingWorkspace(creating: boolean) {
+    setWorkspaceCreating(creating)
+  }
+
+  function showWarpNotice(name: string) {
+    setWarpNotice(`Warped to ${name}`)
+    setTimeout(() => setWarpNotice(undefined), 4000)
+  }
+
+  async function createWorkspace(selection: Extract<WorkspaceSelection, { type: "new" }>) {
+    setCreatingWorkspace(true)
+    const result = await sdk.client.experimental.workspace
+      .create({ type: selection.workspaceType, branch: null })
+      .catch(() => undefined)
+    if (result == undefined || result.error || !result.data) {
+      selectWorkspace(undefined)
+      setCreatingWorkspace(false)
+      toast.show({
+        message: "Creating workspace failed",
+        variant: "error",
+      })
+      return
+    }
+
+    await project.workspace.sync()
+    const workspace = result.data
+    selectWorkspace({
+      type: "existing",
+      workspaceID: workspace.id,
+      workspaceType: workspace.type,
+      workspaceName: workspace.name,
+    })
+    setCreatingWorkspace(false)
+    return workspace
+  }
+
+  async function warpSession(selection: WorkspaceSelection) {
+    if (!props.sessionID) {
+      selectWorkspace(selection)
+      dialog.clear()
+      if (selection.type === "new") void createWorkspace(selection)
+      return
+    }
+    const sourceWorkspaceID = project.workspace.current()
+    const copyChanges = await confirmWorkspaceFileChanges({ dialog, sdk, sourceWorkspaceID })
+    if (copyChanges === undefined) return
+    selectWorkspace(selection)
+    dialog.clear()
+
+    const workspace =
+      selection.type === "none"
+        ? { id: null, name: "local project" }
+        : selection.type === "existing"
+          ? { id: selection.workspaceID, name: selection.workspaceName }
+          : await createWorkspace(selection)
+    if (!workspace) return
+
+    const warped = await warpWorkspaceSession({
+      dialog,
+      sdk,
+      sync,
+      project,
+      toast,
+      sourceWorkspaceID,
+      workspaceID: workspace.id,
+      sessionID: props.sessionID,
+      copyChanges,
+    })
+    if (warped) showWarpNotice(workspace.name)
+  }
+
+  createEffect(() => {
+    if (!workspaceCreating()) {
+      setWorkspaceCreatingDots(3)
+      return
+    }
+    const timer = setInterval(() => setWorkspaceCreatingDots((dots) => (dots % 3) + 1), 1000)
+    onCleanup(() => clearInterval(timer))
+  })
 
   function promptModelWarning() {
     toast.show({
@@ -214,6 +310,7 @@ export function Prompt(props: PromptProps) {
   })
 
   createEffect(() => {
+    if (!input || input.isDestroyed) return
     if (props.disabled) input.cursorColor = theme.backgroundElement
     if (!props.disabled) input.cursorColor = theme.text
   })
@@ -497,6 +594,27 @@ export function Prompt(props: PromptProps) {
           ))
         },
       },
+      {
+        title: "Warp",
+        description: "Change the workspace for the session",
+        value: "workspace.set",
+        category: "Session",
+        enabled: Flag.KILO_EXPERIMENTAL_WORKSPACES,
+        slash: {
+          name: "warp",
+        },
+        onSelect: (dialog) => {
+          void openWorkspaceSelect({
+            dialog,
+            sdk,
+            sync,
+            toast,
+            onSelect: (selection) => {
+              void warpSession(selection)
+            },
+          })
+        },
+      },
     ]
   })
 
@@ -715,6 +833,8 @@ export function Prompt(props: PromptProps) {
   ])
 
   async function submit() {
+    setWarpNotice(undefined)
+
     // IME: double-defer may fire before onContentChange flushes the last
     // composed character (e.g. Korean hangul) to the store, so read
     // plainText directly and sync before any downstream reads.
@@ -723,6 +843,7 @@ export function Prompt(props: PromptProps) {
       syncExtmarksWithPromptParts()
     }
     if (props.disabled) return false
+    if (workspaceCreating()) return false
     if (autocomplete?.visible) return false
     if (!store.prompt.input) return false
     const agent = local.agent.current()
@@ -745,21 +866,16 @@ export function Prompt(props: PromptProps) {
       dialog.replace(() => (
         <DialogWorkspaceUnavailable
           onRestore={() => {
-            dialog.replace(() => (
-              <DialogWorkspaceCreate
-                onSelect={(nextWorkspaceID) =>
-                  restoreWorkspaceSession({
-                    dialog,
-                    sdk,
-                    sync,
-                    project,
-                    toast,
-                    workspaceID: nextWorkspaceID,
-                    sessionID: props.sessionID!,
-                  })
-                }
-              />
-            ))
+            void openWorkspaceSelect({
+              dialog,
+              sdk,
+              sync,
+              toast,
+              onSelect: (selection) => {
+                void warpSession(selection)
+              },
+            })
+            return false
           }}
         />
       ))
@@ -769,8 +885,16 @@ export function Prompt(props: PromptProps) {
     const variant = local.model.variant.current()
     let sessionID = props.sessionID
     if (sessionID == null) {
+      const workspace = workspaceSelection()
+      const workspaceID = iife(() => {
+        if (!workspace) return defaultWorkspaceID()
+        if (workspace.type === "none") return undefined
+        if (workspace.type === "existing") return workspace.workspaceID
+        return undefined
+      })
+
       const res = await sdk.client.session.create({
-        workspace: props.workspaceID,
+        workspace: workspaceID,
         agent: agent.name,
         model: {
           providerID: selectedModel.providerID,
@@ -818,9 +942,8 @@ export function Prompt(props: PromptProps) {
     // Capture mode before it gets reset
     const currentMode = store.mode
     const editorSelection = editorContext()
-    const currentEditorSelectionKey = editorSelectionKey(editorSelection)
     const editorParts =
-      editorSelection && currentEditorSelectionKey !== lastSubmittedEditorSelectionKey
+      editorSelection && editor.labelState() === "pending"
         ? [
             {
               id: PartID.ascending(),
@@ -898,7 +1021,7 @@ export function Prompt(props: PromptProps) {
           ],
         })
         .catch(() => {})
-      lastSubmittedEditorSelectionKey = currentEditorSelectionKey
+      if (editorParts.length > 0) editor.markSelectionSent()
     }
     toast.dismiss() // kilocode_change - dismiss persistent config warning on first submit
     history.append({
@@ -914,13 +1037,15 @@ export function Prompt(props: PromptProps) {
     props.onSubmit?.()
 
     // temporary hack to make sure the message is sent
-    if (!props.sessionID)
+    if (!props.sessionID) {
+      if (editorParts.length > 0) editor.preserveSelectionFromNewSession()
       setTimeout(() => {
         route.navigate({
           type: "session",
           sessionID,
         })
       }, 50)
+    }
     input.clear()
     return true
   }
@@ -1042,6 +1167,39 @@ export function Prompt(props: PromptProps) {
     return `Ask anything... "${list()[store.placeholder % list().length]}"`
   })
 
+  const workspaceLabel = createMemo<
+    | { type: "new"; workspaceType: string }
+    | { type: "existing"; workspaceType: string; workspaceName: string; status?: WorkspaceStatus }
+    | undefined
+  >(() => {
+    const selected = workspaceSelection()
+    if (!selected) {
+      const workspaceID = defaultWorkspaceID()
+      if (props.sessionID || !workspaceID) return
+      const workspace = project.workspace.get(workspaceID)
+      return {
+        type: "existing",
+        workspaceType: workspace?.type ?? "unknown",
+        workspaceName: workspace?.name ?? workspaceID,
+        status: project.workspace.status(workspaceID) ?? "error",
+      }
+    }
+    if (selected.type === "none") return
+    if (props.sessionID && !workspaceCreating()) return
+    if (selected.type === "new") {
+      return {
+        type: "new",
+        workspaceType: selected.workspaceType,
+      }
+    }
+    return {
+      type: "existing",
+      workspaceType: selected.workspaceType,
+      workspaceName: selected.workspaceName,
+      status: selected.type === "existing" ? "connected" : undefined,
+    }
+  })
+
   const spinnerDef = createMemo(() => {
     const agent = local.agent.current()
     const color = agent ? local.agent.color(agent.name ?? "") : theme.border // kilocode_change
@@ -1318,7 +1476,7 @@ export function Prompt(props: PromptProps) {
               }}
               onMouseDown={(r: MouseEvent) => r.target?.focus()}
               focusedBackgroundColor={theme.backgroundElement}
-              cursorColor={theme.text}
+              cursorColor={props.disabled ? theme.backgroundElement : theme.text}
               syntaxStyle={syntax()}
             />
             <box flexDirection="row" flexShrink={0} paddingTop={1} gap={1} justifyContent="space-between">
@@ -1394,86 +1552,124 @@ export function Prompt(props: PromptProps) {
           />
         </box>
         <box width="100%" flexDirection="row" justifyContent="space-between">
-          <Show when={status().type !== "idle"} fallback={props.hint ?? <text />}>
-            <box
-              flexDirection="row"
-              gap={1}
-              flexGrow={1}
-              justifyContent={status().type === "retry" ? "space-between" : "flex-start"}
-            >
-              <box flexShrink={0} flexDirection="row" gap={1}>
-                <box marginLeft={1}>
-                  <Show when={kv.get("animations_enabled", true)} fallback={<text fg={theme.textMuted}>[⋯]</text>}>
-                    <spinner color={spinnerDef().color} frames={spinnerDef().frames} interval={40} />
-                  </Show>
-                </box>
-                <box flexDirection="row" gap={1} flexShrink={0}>
-                  {(() => {
-                    const retry = createMemo(() => {
-                      const s = status()
-                      if (s.type !== "retry") return
-                      return s
-                    })
-                    const message = createMemo(() => {
-                      const r = retry()
-                      if (!r) return
-                      if (r.message.includes("exceeded your current quota") && r.message.includes("gemini"))
-                        return "gemini is way too hot right now"
-                      if (r.message.length > 80) return r.message.slice(0, 80) + "..."
-                      return r.message
-                    })
-                    const isTruncated = createMemo(() => {
-                      const r = retry()
-                      if (!r) return false
-                      return r.message.length > 120
-                    })
-                    const [seconds, setSeconds] = createSignal(0)
-                    onMount(() => {
-                      const timer = setInterval(() => {
-                        const next = retry()?.next
-                        if (next) setSeconds(Math.round((next - Date.now()) / 1000))
-                      }, 1000)
-
-                      onCleanup(() => {
-                        clearInterval(timer)
+          <Switch>
+            <Match when={status().type !== "idle"}>
+              <box
+                flexDirection="row"
+                gap={1}
+                flexGrow={1}
+                justifyContent={status().type === "retry" ? "space-between" : "flex-start"}
+              >
+                <box flexShrink={0} flexDirection="row" gap={1}>
+                  <box marginLeft={1}>
+                    <Show when={kv.get("animations_enabled", true)} fallback={<text fg={theme.textMuted}>[⋯]</text>}>
+                      <spinner color={spinnerDef().color} frames={spinnerDef().frames} interval={40} />
+                    </Show>
+                  </box>
+                  <box flexDirection="row" gap={1} flexShrink={0}>
+                    {(() => {
+                      const retry = createMemo(() => {
+                        const s = status()
+                        if (s.type !== "retry") return
+                        return s
                       })
-                    })
-                    const handleMessageClick = () => {
-                      const r = retry()
-                      if (!r) return
-                      if (isTruncated()) {
-                        void DialogAlert.show(dialog, "Retry Error", r.message)
+                      const message = createMemo(() => {
+                        const r = retry()
+                        if (!r) return
+                        if (r.message.includes("exceeded your current quota") && r.message.includes("gemini"))
+                          return "gemini is way too hot right now"
+                        if (r.message.length > 80) return r.message.slice(0, 80) + "..."
+                        return r.message
+                      })
+                      const isTruncated = createMemo(() => {
+                        const r = retry()
+                        if (!r) return false
+                        return r.message.length > 120
+                      })
+                      const [seconds, setSeconds] = createSignal(0)
+                      onMount(() => {
+                        const timer = setInterval(() => {
+                          const next = retry()?.next
+                          if (next) setSeconds(Math.round((next - Date.now()) / 1000))
+                        }, 1000)
+
+                        onCleanup(() => {
+                          clearInterval(timer)
+                        })
+                      })
+                      const handleMessageClick = () => {
+                        const r = retry()
+                        if (!r) return
+                        if (isTruncated()) {
+                          void DialogAlert.show(dialog, "Retry Error", r.message)
+                        }
                       }
-                    }
 
-                    const retryText = () => {
-                      const r = retry()
-                      if (!r) return ""
-                      const baseMessage = message()
-                      const truncatedHint = isTruncated() ? " (click to expand)" : ""
-                      const duration = formatDuration(seconds())
-                      const retryInfo = ` [retrying ${duration ? `in ${duration} ` : ""}attempt #${r.attempt}]`
-                      return baseMessage + truncatedHint + retryInfo
-                    }
+                      const retryText = () => {
+                        const r = retry()
+                        if (!r) return ""
+                        const baseMessage = message()
+                        const truncatedHint = isTruncated() ? " (click to expand)" : ""
+                        const duration = formatDuration(seconds())
+                        const retryInfo = ` [retrying ${duration ? `in ${duration} ` : ""}attempt #${r.attempt}]`
+                        return baseMessage + truncatedHint + retryInfo
+                      }
 
-                    return (
-                      <Show when={retry()}>
-                        <box onMouseUp={handleMessageClick}>
-                          <text fg={theme.error}>{retryText()}</text>
-                        </box>
-                      </Show>
-                    )
-                  })()}
+                      return (
+                        <Show when={retry()}>
+                          <box onMouseUp={handleMessageClick}>
+                            <text fg={theme.error}>{retryText()}</text>
+                          </box>
+                        </Show>
+                      )
+                    })()}
+                  </box>
                 </box>
+                <text fg={store.interrupt > 0 ? theme.primary : theme.text}>
+                  esc{" "}
+                  <span style={{ fg: store.interrupt > 0 ? theme.primary : theme.textMuted }}>
+                    {store.interrupt > 0 ? "again to interrupt" : "interrupt"}
+                  </span>
+                </text>
               </box>
-              <text fg={store.interrupt > 0 ? theme.primary : theme.text}>
-                esc{" "}
-                <span style={{ fg: store.interrupt > 0 ? theme.primary : theme.textMuted }}>
-                  {store.interrupt > 0 ? "again to interrupt" : "interrupt"}
-                </span>
-              </text>
-            </box>
-          </Show>
+            </Match>
+            <Match when={warpNotice()}>
+              {(notice) => (
+                <box paddingLeft={3}>
+                  <text fg={theme.accent}>{notice()}</text>
+                </box>
+              )}
+            </Match>
+            <Match when={workspaceLabel()}>
+              {(workspace) => (
+                <box paddingLeft={3} flexDirection="row" gap={1}>
+                  <Show when={workspaceCreating()}>
+                    <Spinner color={theme.accent} />
+                  </Show>
+                  <text fg={workspaceCreating() ? theme.accent : theme.text}>
+                    {(() => {
+                      const item = workspace()
+                      if (item.type === "new") {
+                        if (workspaceCreating())
+                          return `Creating ${item.workspaceType}${".".repeat(workspaceCreatingDots())}`
+                        return (
+                          <>
+                            Workspace <span style={{ fg: theme.textMuted }}>(new {item.workspaceType})</span>
+                          </>
+                        )
+                      }
+                      return (
+                        <>
+                          Workspace <span style={{ fg: theme.textMuted }}>{item.workspaceName}</span>
+                        </>
+                      )
+                    })()}
+                  </text>
+                </box>
+              )}
+            </Match>
+            <Match when={true}>{props.hint ?? <text />}</Match>
+          </Switch>
           <Show when={status().type !== "retry"}>
             <box gap={2} flexDirection="row">
               {/* kilocode_change start - show "ctrl+c again to exit" hint */}
@@ -1483,16 +1679,9 @@ export function Prompt(props: PromptProps) {
                 </text>
               </Show>
               {/* kilocode_change end */}
-              <Show when={editorFileLabelDisplay()}>
+              <Show when={editorContextLabelState() !== "none" ? editorFileLabelDisplay() : undefined}>
                 {(file) => (
-                  <text
-                    fg={theme.secondary}
-                    onMouseOver={() => setEditorContextHover(true)}
-                    onMouseOut={() => setEditorContextHover(false)}
-                    onMouseUp={dismissEditorContext}
-                  >
-                    {editorContextHover() ? `x ${file()}` : file()}
-                  </text>
+                  <text fg={editorContextLabelState() === "pending" ? theme.secondary : theme.textMuted}>{file()}</text>
                 )}
               </Show>
               <Switch>

packages/opencode/src/cli/cmd/tui/component/workspace-label.tsx

@@ -0,0 +1,19 @@
+import { useTheme } from "@tui/context/theme"
+
+export type WorkspaceStatus = "connected" | "connecting" | "disconnected" | "error"
+
+export function WorkspaceLabel(props: { type: string; name: string; status?: WorkspaceStatus; icon?: boolean }) {
+  const { theme } = useTheme()
+  const color = () => {
+    if (props.status === "connected") return theme.success
+    if (props.status === "error") return theme.error
+    return theme.textMuted
+  }
+
+  return (
+    <>
+      {props.icon ? <span style={{ fg: color() }}>● </span> : undefined}
+      <span style={{ fg: theme.text }}>{props.name}</span> <span style={{ fg: theme.textMuted }}>({props.type})</span>
+    </>
+  )
+}

packages/opencode/src/cli/cmd/tui/context/editor.ts

@@ -87,6 +87,7 @@ const EditorServerInfoSchema = z.object({
 type JsonRpcMessage = z.infer<typeof JsonRpcMessageSchema>
 export type EditorSelection = z.infer<typeof EditorSelectionSchema>
 export type EditorMention = z.infer<typeof EditorMentionSchema>
+export type EditorLabelState = "pending" | "sent" | "none"
 type EditorServerInfo = z.infer<typeof EditorServerInfoSchema>
 
 type EditorConnection = {
@@ -111,10 +112,12 @@ export const { use: useEditorContext, provider: EditorContextProvider } = create
     const [store, setStore] = createStore<{
       status: "disabled" | "connecting" | "connected"
       selection: EditorSelection | undefined
+      selectionSent: boolean
       server: EditorServerInfo | undefined
     }>({
       status: "disabled",
       selection: undefined,
+      selectionSent: false,
       server: undefined,
     })
 
@@ -126,8 +129,24 @@ export const { use: useEditorContext, provider: EditorContextProvider } = create
     let zedSelection: Promise<void> | undefined
     let lastZedSelectionKey: string | undefined
     let directory = process.cwd()
+    let preserveSelectionOnReconnect = false
     const pending = new Map<number, string>()
 
+    const setSelection = (selection: EditorSelection | undefined) => {
+      const changed = editorSelectionKey(selection) !== editorSelectionKey(store.selection)
+      setStore("selection", selection)
+      if (changed) setStore("selectionSent", false)
+    }
+
+    const clearSelectionForReconnect = (options?: { resetZedSelectionKey?: boolean }) => {
+      if (preserveSelectionOnReconnect) {
+        preserveSelectionOnReconnect = false
+        return
+      }
+      if (options?.resetZedSelectionKey) lastZedSelectionKey = undefined
+      setSelection(undefined)
+    }
+
     const send = (payload: JsonRpcMessage) => {
       if (!socket || socket.readyState !== 1) return
       socket.send(JSON.stringify({ jsonrpc: "2.0", ...payload }))
@@ -158,7 +177,7 @@ export const { use: useEditorContext, provider: EditorContextProvider } = create
             const key = editorSelectionKey(selection)
             if (key !== lastZedSelectionKey) {
               lastZedSelectionKey = key
-              setStore("selection", selection)
+              setSelection(selection)
               setStore("status", selection ? "connected" : "disabled")
             }
           })
@@ -198,7 +217,7 @@ export const { use: useEditorContext, provider: EditorContextProvider } = create
         const selection =
           message.method === "selection_changed" ? EditorSelectionSchema.safeParse(message.params) : undefined
         if (selection?.success) {
-          setStore("selection", { ...selection.data, source: "websocket" })
+          setSelection({ ...selection.data, source: "websocket" })
           return
         }
 
@@ -252,12 +271,13 @@ export const { use: useEditorContext, provider: EditorContextProvider } = create
 
     const reconnectWithDirectory = (nextDirectory?: string) => {
       const resolved = nextDirectory || process.cwd()
-      if (directory === resolved) return
+      const sameDirectory = directory === resolved
+      clearSelectionForReconnect({ resetZedSelectionKey: !sameDirectory })
+      if (sameDirectory) return
 
       directory = resolved
       attempt = 0
       pending.clear()
-      lastZedSelectionKey = undefined
       if (reconnect) clearTimeout(reconnect)
       reconnect = undefined
       if (socket) {
@@ -266,7 +286,6 @@ export const { use: useEditorContext, provider: EditorContextProvider } = create
         current.close()
       }
       setStore("status", "disabled")
-      setStore("selection", undefined)
       setStore("server", undefined)
       connect()
     }
@@ -293,7 +312,19 @@ export const { use: useEditorContext, provider: EditorContextProvider } = create
       },
       clearSelection() {
         lastZedSelectionKey = undefined
-        setStore("selection", undefined)
+        zedSelection = undefined
+        setSelection(undefined)
+      },
+      preserveSelectionFromNewSession() {
+        preserveSelectionOnReconnect = true
+      },
+      markSelectionSent() {
+        if (!store.selection) return
+        setStore("selectionSent", true)
+      },
+      labelState(): EditorLabelState {
+        if (!store.selection) return "none"
+        return store.selectionSent ? "sent" : "pending"
       },
       onMention(listener: (mention: EditorMention) => void) {
         mentionListeners.add(listener)
@@ -303,7 +334,6 @@ export const { use: useEditorContext, provider: EditorContextProvider } = create
         return store.server
       },
       reconnect(directory?: string) {
-        setStore("selection", undefined)
         reconnectWithDirectory(directory)
       },
     }

packages/opencode/src/cli/cmd/tui/context/local.tsx

@@ -464,20 +464,17 @@ export const { use: useLocal, provider: LocalProvider } = createSimpleContext({
       },
     }
 
-    // kilocode_change - validate configured agent model when agent changes
     createEffect(() => {
       // kilocode_change start - configured models resolve directly without persistence
       if (!model.ready) return
       const value = agent.current()
-      if (!value) return // guard against empty agent list during org switch
-      if (!value.model) return
+      if (!value?.model) return
       if (isModelValid(value.model)) return
       toast.show({
         variant: "warning",
         message: `Agent ${value.name}'s configured model ${value.model.providerID}/${value.model.modelID} is not valid`,
         duration: 3000,
       })
-      // kilocode_change end
     })
 
     const result = {

packages/opencode/src/cli/cmd/tui/context/sync-v2.tsx

@@ -11,21 +11,21 @@ import { createSimpleContext } from "./helper"
 import { useSDK } from "./sdk"
 
 function activeAssistant(messages: SessionMessage[]) {
-  const index = messages.findLastIndex((message) => message.type === "assistant" && !message.time.completed)
+  const index = messages.findIndex((message) => message.type === "assistant" && !message.time.completed)
   if (index < 0) return
   const assistant = messages[index]
   return assistant?.type === "assistant" ? assistant : undefined
 }
 
 function activeCompaction(messages: SessionMessage[]) {
-  const index = messages.findLastIndex((message) => message.type === "compaction")
+  const index = messages.findIndex((message) => message.type === "compaction")
   if (index < 0) return
   const compaction = messages[index]
   return compaction?.type === "compaction" ? compaction : undefined
 }
 
 function activeShell(messages: SessionMessage[], callID: string) {
-  const index = messages.findLastIndex((message) => message.type === "shell" && message.callID === callID)
+  const index = messages.findIndex((message) => message.type === "shell" && message.callID === callID)
   if (index < 0) return
   const shell = messages[index]
   return shell?.type === "shell" ? shell : undefined
@@ -74,7 +74,7 @@ export const { use: useSyncV2, provider: SyncProviderV2 } = createSimpleContext(
       switch (event.type) {
         case "session.next.prompted": {
           update(event.properties.sessionID, (draft) => {
-            draft.push({
+            draft.unshift({
               id: event.id,
               type: "user",
               text: event.properties.prompt.text,
@@ -87,7 +87,7 @@ export const { use: useSyncV2, provider: SyncProviderV2 } = createSimpleContext(
         }
         case "session.next.synthetic":
           update(event.properties.sessionID, (draft) => {
-            draft.push({
+            draft.unshift({
               id: event.id,
               type: "synthetic",
               sessionID: event.properties.sessionID,
@@ -98,7 +98,7 @@ export const { use: useSyncV2, provider: SyncProviderV2 } = createSimpleContext(
           break
         case "session.next.shell.started":
           update(event.properties.sessionID, (draft) => {
-            draft.push({
+            draft.unshift({
               id: event.id,
               type: "shell",
               callID: event.properties.callID,
@@ -120,7 +120,7 @@ export const { use: useSyncV2, provider: SyncProviderV2 } = createSimpleContext(
           update(event.properties.sessionID, (draft) => {
             const currentAssistant = activeAssistant(draft)
             if (currentAssistant) currentAssistant.time.completed = event.properties.timestamp
-            draft.push({
+            draft.unshift({
               id: event.id,
               type: "assistant",
               agent: event.properties.agent,
@@ -259,7 +259,7 @@ export const { use: useSyncV2, provider: SyncProviderV2 } = createSimpleContext(
           break
         case "session.next.compaction.started":
           update(event.properties.sessionID, (draft) => {
-            draft.push({
+            draft.unshift({
               id: event.id,
               type: "compaction",
               reason: event.properties.reason,

packages/opencode/src/cli/cmd/tui/feature-plugins/system/session-v2.tsx

@@ -5,7 +5,7 @@ import { Spinner } from "@tui/component/spinner"
 import { useTheme } from "@tui/context/theme"
 import { useLocal } from "@tui/context/local"
 import { useKeyboard, useRenderer, useTerminalDimensions, type JSX } from "@opentui/solid"
-import type { SyntaxStyle } from "@opentui/core"
+import { TextAttributes, type BoxRenderable, type SyntaxStyle } from "@opentui/core"
 import { Locale } from "@/util/locale"
 import { LANGUAGE_EXTENSIONS } from "@/lsp/language"
 import path from "path"
@@ -44,6 +44,10 @@ function View(props: { api: TuiPluginApi; sessionID: string }) {
   const messages = createMemo(() => sync.data.messages[props.sessionID] ?? [])
   const renderedMessages = createMemo(() => messages().toReversed())
   const lastAssistant = createMemo(() => renderedMessages().findLast((message) => message.type === "assistant"))
+  const lastUserCreated = (index: number) =>
+    renderedMessages()
+      .slice(0, index)
+      .findLast((message) => message.type === "user")?.time.created
 
   createEffect(() => {
     void sync.session.message.sync(props.sessionID)
@@ -83,10 +87,11 @@ function View(props: { api: TuiPluginApi; sessionID: string }) {
                       last={lastAssistant()?.id === message.id}
                       syntax={syntax()}
                       subtleSyntax={subtleSyntax()}
+                      start={lastUserCreated(index())}
                     />
                   </Match>
                   <Match when={message.type === "synthetic"}>
-                    <SyntheticMessage message={message as SessionMessageSynthetic} index={index()} />
+                    <></>
                   </Match>
                   <Match when={message.type === "shell"}>
                     <ShellMessage message={message as SessionMessageShell} />
@@ -146,63 +151,36 @@ function UserMessage(props: { message: SessionMessageUser; index: number }) {
     <box
       id={props.message.id}
       border={["left"]}
-      borderColor={theme.primary}
+      borderColor={theme.secondary}
       customBorderChars={SplitBorder.customBorderChars}
       marginTop={props.index === 0 ? 0 : 1}
       flexShrink={0}
-    >
-      <box paddingTop={1} paddingBottom={1} paddingLeft={2} backgroundColor={theme.backgroundPanel}>
-        <Show
-          when={props.message.text.trim()}
-          fallback={
-            <MissingData label="User message text" detail={`Message ${props.message.id} has no text field content.`} />
-          }
-        >
-          <text fg={theme.text}>{props.message.text}</text>
-        </Show>
-        <Show when={attachments().length}>
-          <box flexDirection="row" paddingTop={1} gap={1} flexWrap="wrap">
-            <For each={props.message.files ?? []}>
-              {(file) => (
-                <text fg={theme.text}>
-                  <span style={{ bg: theme.secondary, fg: theme.background }}> {file.mime} </span>
-                  <span style={{ bg: theme.backgroundElement, fg: theme.textMuted }}> {file.name ?? file.uri} </span>
-                </text>
-              )}
-            </For>
-            <For each={props.message.agents ?? []}>
-              {(agent) => (
-                <text fg={theme.text}>
-                  <span style={{ bg: theme.accent, fg: theme.background }}> agent </span>
-                  <span style={{ bg: theme.backgroundElement, fg: theme.textMuted }}> {agent.name} </span>
-                </text>
-              )}
-            </For>
-          </box>
-        </Show>
-        <text fg={theme.textMuted}>{Locale.todayTimeOrDateTime(props.message.time.created)}</text>
-      </box>
-    </box>
-  )
-}
-
-function SyntheticMessage(props: { message: SessionMessageSynthetic; index: number }) {
-  const { theme } = useTheme()
-  return (
-    <box
-      id={props.message.id}
-      border={["left"]}
-      borderColor={theme.backgroundElement}
-      customBorderChars={SplitBorder.customBorderChars}
-      marginTop={props.index === 0 ? 0 : 1}
-      paddingLeft={2}
       paddingTop={1}
       paddingBottom={1}
+      paddingLeft={2}
       backgroundColor={theme.backgroundPanel}
-      flexShrink={0}
     >
-      <text fg={theme.textMuted}>Synthetic</text>
       <text fg={theme.text}>{props.message.text}</text>
+      <Show when={attachments().length}>
+        <box flexDirection="row" paddingTop={1} gap={1} flexWrap="wrap">
+          <For each={props.message.files ?? []}>
+            {(file) => (
+              <text fg={theme.text}>
+                <span style={{ bg: theme.secondary, fg: theme.background }}> {file.mime} </span>
+                <span style={{ bg: theme.backgroundElement, fg: theme.textMuted }}> {file.name ?? file.uri} </span>
+              </text>
+            )}
+          </For>
+          <For each={props.message.agents ?? []}>
+            {(agent) => (
+              <text fg={theme.text}>
+                <span style={{ bg: theme.accent, fg: theme.background }}> agent </span>
+                <span style={{ bg: theme.backgroundElement, fg: theme.textMuted }}> {agent.name} </span>
+              </text>
+            )}
+          </For>
+        </box>
+      </Show>
     </box>
   )
 }
@@ -237,7 +215,7 @@ function ShellMessage(props: { message: SessionMessageShell }) {
 }
 
 function CompactionMessage(props: { message: SessionMessageCompaction }) {
-  const { theme } = useTheme()
+  const { theme, syntax } = useTheme()
   return (
     <box
       marginTop={1}
@@ -248,7 +226,19 @@ function CompactionMessage(props: { message: SessionMessageCompaction }) {
       flexShrink={0}
     >
       <Show when={props.message.summary}>
-        <text fg={theme.textMuted}>{props.message.summary}</text>
+        {(summary) => (
+          <box paddingLeft={3} paddingTop={1}>
+            <code
+              filetype="markdown"
+              drawUnstyledText={false}
+              streaming={false}
+              syntaxStyle={syntax()}
+              content={summary().trim()}
+              conceal={true}
+              fg={theme.text}
+            />
+          </box>
+        )}
       </Show>
     </box>
   )
@@ -294,12 +284,13 @@ function AssistantMessage(props: {
   last: boolean
   syntax: SyntaxStyle
   subtleSyntax: SyntaxStyle
+  start?: number
 }) {
   const { theme } = useTheme()
   const local = useLocal()
   const duration = createMemo(() => {
     if (!props.message.time.completed) return 0
-    return props.message.time.completed - props.message.time.created
+    return props.message.time.completed - (props.start ?? props.message.time.created)
   })
   const model = createMemo(() => {
     const variant = props.message.model.variant ? `/${props.message.model.variant}` : ""
@@ -361,7 +352,7 @@ function AssistantText(props: { part: SessionMessageAssistantText; syntax: Synta
   const { theme } = useTheme()
   return (
     <Show when={props.part.text.trim()}>
-      <box paddingLeft={3} marginTop={1} flexShrink={0}>
+      <box paddingLeft={3} marginTop={1} flexShrink={0} id="text">
         <code
           filetype="markdown"
           drawUnstyledText={false}
@@ -521,33 +512,93 @@ function InlineTool(props: {
   part: SessionMessageAssistantTool
 }) {
   const { theme } = useTheme()
+  const renderer = useRenderer()
+  const [margin, setMargin] = createSignal(0)
+  const [hover, setHover] = createSignal(false)
+  const [showError, setShowError] = createSignal(false)
   const error = createMemo(() => (props.part.state.status === "error" ? props.part.state.error.message : undefined))
+  const complete = createMemo(() => !!props.complete)
   const denied = createMemo(() => {
     const message = error()
     if (!message) return false
     return (
       message.includes("QuestionRejectedError") ||
       message.includes("rejected permission") ||
+      message.includes("specified a rule") ||
       message.includes("user dismissed")
     )
   })
+  const fg = createMemo(() => {
+    if (error()) return theme.error
+    if (complete()) return theme.textMuted
+    return theme.text
+  })
+  const attributes = createMemo(() => (denied() ? TextAttributes.STRIKETHROUGH : undefined))
   return (
-    <box marginTop={1} paddingLeft={3} flexShrink={0}>
-      <Switch>
-        <Match when={props.spinner}>
-          <Spinner color={theme.text}>{props.children}</Spinner>
-        </Match>
-        <Match when={true}>
-          <text paddingLeft={3} fg={props.complete ? theme.textMuted : theme.text}>
-            <Show fallback={<>~ {props.pending}</>} when={props.complete}>
-              {props.icon} {props.children}
-            </Show>
-          </text>
-        </Match>
-      </Switch>
-      <Show when={error() && !denied()}>
-        <text fg={theme.error}>{error()}</text>
-      </Show>
+    <box
+      marginTop={margin()}
+      paddingLeft={3}
+      flexShrink={0}
+      flexDirection="row"
+      gap={1}
+      backgroundColor={hover() && error() ? theme.backgroundMenu : undefined}
+      onMouseOver={() => error() && setHover(true)}
+      onMouseOut={() => setHover(false)}
+      onMouseUp={() => {
+        if (!error()) return
+        if (renderer.getSelection()?.getSelectedText()) return
+        setShowError((prev) => !prev)
+      }}
+      renderBefore={function () {
+        const el = this as BoxRenderable
+        const parent = el.parent
+        if (!parent) return
+        const previous = parent.getChildren()[parent.getChildren().indexOf(el) - 1]
+        if (!previous) {
+          setMargin(0)
+          return
+        }
+        if (previous.id.startsWith("text")) setMargin(1)
+      }}
+    >
+      <box flexShrink={0}>
+        <Switch>
+          <Match when={props.spinner}>
+            <Spinner color={theme.text} />
+          </Match>
+          <Match when={complete()}>
+            <text fg={fg()} attributes={attributes()}>
+              {props.icon}
+            </text>
+          </Match>
+          <Match when={true}>
+            <text fg={fg()} attributes={attributes()}>
+              ~
+            </text>
+          </Match>
+        </Switch>
+      </box>
+      <box flexGrow={1}>
+        <box>
+          <Switch>
+            <Match when={complete()}>
+              <text fg={fg()} attributes={attributes()}>
+                {props.children}
+              </text>
+            </Match>
+            <Match when={true}>
+              <text fg={fg()} attributes={attributes()}>
+                {props.pending}
+              </text>
+            </Match>
+          </Switch>
+        </box>
+        <Show when={showError() && error()}>
+          <box>
+            <text fg={theme.error}>{error()}</text>
+          </box>
+        </Show>
+      </box>
     </box>
   )
 }

packages/opencode/src/cli/cmd/tui/routes/home.tsx

@@ -1,5 +1,5 @@
 import { Prompt, type PromptRef } from "@tui/component/prompt"
-import { createEffect, createSignal } from "solid-js"
+import { createEffect, createSignal, onMount } from "solid-js"
 import { Logo } from "../component/logo"
 import { useProject } from "../context/project"
 import { useSync } from "../context/sync"
@@ -9,6 +9,7 @@ import { useRouteData } from "@tui/context/route"
 import { usePromptRef } from "../context/prompt"
 import { useLocal } from "../context/local"
 import { TuiPluginRuntime } from "@/cli/cmd/tui/plugin/runtime"
+import { useEditorContext } from "@tui/context/editor"
 
 let once = false
 const placeholder = {
@@ -24,8 +25,13 @@ export function Home() {
   const [ref, setRef] = createSignal<PromptRef | undefined>()
   const args = useArgs()
   const local = useLocal()
+  const editor = useEditorContext()
   let sent = false
 
+  onMount(() => {
+    editor.clearSelection()
+  })
+
   const bind = (r: PromptRef | undefined) => {
     setRef(r)
     promptRef.set(r)

packages/opencode/src/cli/cmd/tui/routes/session/sidebar.tsx

@@ -7,6 +7,7 @@ import { InstallationChannel, InstallationVersion } from "@opencode-ai/core/inst
 import { TuiPluginRuntime } from "@/cli/cmd/tui/plugin/runtime"
 
 import { getScrollAcceleration } from "../../util/scroll"
+import { WorkspaceLabel } from "../../component/workspace-label"
 
 export function Sidebar(props: { sessionID: string; overlay?: boolean }) {
   const project = useProject()
@@ -14,17 +15,10 @@ export function Sidebar(props: { sessionID: string; overlay?: boolean }) {
   const { theme } = useTheme()
   const tuiConfig = useTuiConfig()
   const session = createMemo(() => sync.session.get(props.sessionID))
-  const workspaceStatus = () => {
+  const workspace = () => {
     const workspaceID = session()?.workspaceID
-    if (!workspaceID) return "error"
-    return project.workspace.status(workspaceID) ?? "error"
-  }
-  const workspaceLabel = () => {
-    const workspaceID = session()?.workspaceID
-    if (!workspaceID) return "unknown"
-    const info = project.workspace.get(workspaceID)
-    if (!info) return "unknown"
-    return `${info.type}: ${info.name}`
+    if (!workspaceID) return
+    return project.workspace.get(workspaceID)
   }
   const scrollAcceleration = createMemo(() => getScrollAcceleration(tuiConfig))
 
@@ -67,8 +61,19 @@ export function Sidebar(props: { sessionID: string; overlay?: boolean }) {
                 </Show>
                 <Show when={session()!.workspaceID}>
                   <text fg={theme.textMuted}>
-                    <span style={{ fg: workspaceStatus() === "connected" ? theme.success : theme.error }}>●</span>{" "}
-                    {workspaceLabel()}
+                    <Show
+                      when={workspace()}
+                      fallback={<WorkspaceLabel type="unknown" name={session()!.workspaceID!} status="error" icon />}
+                    >
+                      {(item) => (
+                        <WorkspaceLabel
+                          type={item().type}
+                          name={item().name}
+                          status={project.workspace.status(item().id) ?? "error"}
+                          icon
+                        />
+                      )}
+                    </Show>
                   </text>
                 </Show>
                 <Show when={session()!.share?.url}>

packages/opencode/src/cli/cmd/tui/ui/dialog-select.tsx

@@ -23,6 +23,7 @@ export interface DialogSelectProps<T> {
   onFilter?: (query: string) => void
   onSelect?: (option: DialogSelectOption<T>) => void
   skipFilter?: boolean
+  renderFilter?: boolean
   keybind?: {
     keybind?: Keybind.Info
     title: string
@@ -81,7 +82,7 @@ export function DialogSelect<T>(props: DialogSelectProps<T>) {
   let input: InputRenderable
 
   const filtered = createMemo(() => {
-    if (props.skipFilter) return props.options.filter((x) => x.disabled !== true)
+    if (props.skipFilter || props.renderFilter === false) return props.options.filter((x) => x.disabled !== true)
     const needle = store.filter.toLowerCase()
     const options = pipe(
       props.options,
@@ -250,30 +251,32 @@ export function DialogSelect<T>(props: DialogSelectProps<T>) {
             esc
           </text>
         </box>
-        <box paddingTop={1}>
-          <input
-            onInput={(e) => {
-              batch(() => {
-                setStore("filter", e)
-                props.onFilter?.(e)
-              })
-            }}
-            focusedBackgroundColor={theme.backgroundPanel}
-            cursorColor={theme.primary}
-            focusedTextColor={theme.textMuted}
-            ref={(r) => {
-              input = r
-              input.traits = { status: "FILTER" }
-              setTimeout(() => {
-                if (!input) return
-                if (input.isDestroyed) return
-                input.focus()
-              }, 1)
-            }}
-            placeholder={props.placeholder ?? "Search"}
-            placeholderColor={theme.textMuted}
-          />
-        </box>
+        <Show when={props.renderFilter !== false}>
+          <box paddingTop={1}>
+            <input
+              onInput={(e) => {
+                batch(() => {
+                  setStore("filter", e)
+                  props.onFilter?.(e)
+                })
+              }}
+              focusedBackgroundColor={theme.backgroundPanel}
+              cursorColor={theme.primary}
+              focusedTextColor={theme.textMuted}
+              ref={(r) => {
+                input = r
+                input.traits = { status: "FILTER" }
+                setTimeout(() => {
+                  if (!input) return
+                  if (input.isDestroyed) return
+                  input.focus()
+                }, 1)
+              }}
+              placeholder={props.placeholder ?? "Search"}
+              placeholderColor={theme.textMuted}
+            />
+          </box>
+        </Show>
       </box>
       <Show
         when={grouped().length > 0}

packages/opencode/src/cli/cmd/web.ts

@@ -41,7 +41,7 @@ export const WebCommand = effectCmd({
     if (!Flag.KILO_SERVER_PASSWORD) {
       UI.println(UI.Style.TEXT_WARNING_BOLD + "!  KILO_SERVER_PASSWORD is not set; server is unsecured.")
     }
-    const opts = yield* Effect.promise(() => resolveNetworkOptions(args))
+    const opts = yield* resolveNetworkOptions(args)
     const server = yield* Effect.promise(() => Server.listen(opts))
     UI.empty()
     UI.println(UI.logo("  "))
@@ -73,7 +73,7 @@ export const WebCommand = effectCmd({
       }
 
       // Open localhost in browser
-      open(localhostUrl.toString()).catch(() => {})
+      open(localhostUrl).catch(() => {})
     } else {
       const displayUrl = server.url.toString()
       UI.println(UI.Style.TEXT_INFO_BOLD + "  Web interface:    ", UI.Style.TEXT_NORMAL, displayUrl)

packages/opencode/src/cli/network.ts

@@ -1,6 +1,6 @@
 import type { Argv, InferredOptionTypes } from "yargs"
 import { Config } from "@/config/config"
-import { AppRuntime } from "@/effect/app-runtime"
+import { Effect } from "effect"
 
 const options = {
   port: {
@@ -36,10 +36,10 @@ export type NetworkOptions = InferredOptionTypes<typeof options>
 export function withNetworkOptions<T>(yargs: Argv<T>) {
   return yargs.options(options)
 }
-export async function resolveNetworkOptions(args: NetworkOptions) {
-  const config = await AppRuntime.runPromise(Config.Service.use((cfg) => cfg.getGlobal()))
+export const resolveNetworkOptions = Effect.fn("Cli.resolveNetworkOptions")(function* (args: NetworkOptions) {
+  const config = yield* Config.Service.use((cfg) => cfg.getGlobal())
   return resolveNetworkOptionsNoConfig(args, config)
-}
+})
 
 export function resolveNetworkOptionsNoConfig(args: NetworkOptions, config?: Config.Info) {
   const portExplicitlySet = process.argv.includes("--port")

packages/opencode/src/config/config.ts

@@ -96,6 +96,36 @@ export type Warning = z.infer<typeof Warning>
 const { caught: caughtWarning } = KilocodeConfig
 // kilocode_change end
 
+async function substituteWellKnownRemoteConfig(input: { value: unknown; dir: string; source: string }) {
+  if (!isRecord(input.value) || typeof input.value.url !== "string") return
+
+  const url = await ConfigVariable.substitute({
+    text: input.value.url,
+    type: "virtual",
+    dir: input.dir,
+    source: input.source,
+  })
+  const headers = isRecord(input.value.headers)
+    ? Object.fromEntries(
+        await Promise.all(
+          Object.entries(input.value.headers)
+            .filter((entry): entry is [string, string] => typeof entry[1] === "string")
+            .map(async ([key, value]) => [
+              key,
+              await ConfigVariable.substitute({
+                text: value,
+                type: "virtual",
+                dir: input.dir,
+                source: input.source,
+              }),
+            ]),
+        ),
+      )
+    : undefined
+
+  return { url, headers }
+}
+
 async function resolveLoadedPlugins<T extends { plugin?: ConfigPlugin.Spec[] }>(config: T, filepath: string) {
   if (!config.plugin) return config
   for (let i = 0; i < config.plugin.length; i++) {
@@ -634,42 +664,56 @@ export const layer = Layer.effect(
         for (const [key, value] of Object.entries(auth)) {
           if (value.type === "wellknown") {
             const url = key.replace(/\/+$/, "")
-            const source = `${url}/.well-known/opencode`
-            process.env[value.key] = value.token
-            log.debug("fetching remote config", { url: source })
+            const source = `${url}/.well-known/opencode` // kilocode_change
             // kilocode_change start - warn instead of fail on wellknown errors
-            const next = yield* Effect.tryPromise({
-              try: async () => {
-                const response = await fetch(source)
-                if (!response.ok) {
-                  throw new Error(`failed to fetch remote config from ${url}: ${response.status}`)
-                }
-                const wellknown = (await response.json()) as { config?: Record<string, unknown> }
-                const remoteConfig = wellknown.config ?? {}
-                if (!remoteConfig.$schema) remoteConfig.$schema = "https://app.kilo.ai/config.json"
-                return remoteConfig
-              },
-              catch: (err) => err,
-            }).pipe(
-              Effect.flatMap((remoteConfig) =>
-                loadConfig(JSON.stringify(remoteConfig), {
-                  dir: path.dirname(source),
-                  source,
+            yield* Effect.gen(function* () {
+              process.env[value.key] = value.token
+              log.debug("fetching remote config", { url: `${url}/.well-known/opencode` })
+              const response = yield* Effect.promise(() => fetch(`${url}/.well-known/opencode`))
+              if (!response.ok) {
+                throw new Error(`failed to fetch remote config from ${url}: ${response.status}`)
+              }
+              const wellknown = (yield* Effect.promise(() => response.json())) as {
+                config?: Record<string, unknown>
+                remote_config?: unknown
+              }
+              const remote = yield* Effect.promise(() =>
+                substituteWellKnownRemoteConfig({
+                  value: wellknown.remote_config,
+                  dir: url,
+                  source: `${url}/.well-known/opencode`,
                 }),
-              ),
-              Effect.tap(() => Effect.sync(() => log.debug("loaded remote config from well-known", { url }))),
+              )
+              const fetchedConfig = remote
+                ? ((yield* Effect.promise(async () => {
+                    log.debug("fetching remote config", { url: remote.url })
+                    const response = await fetch(remote.url, { headers: remote.headers })
+                    if (!response.ok)
+                      throw new Error(`failed to fetch remote config from ${remote.url}: ${response.status}`)
+                    const data = await response.json()
+                    return isRecord(data) && isRecord(data.config) ? data.config : data
+                  })) as Record<string, unknown>)
+                : {}
+              const remoteConfig = mergeConfig(wellknown.config ?? {}, fetchedConfig as Info)
+              if (!remoteConfig.$schema) remoteConfig.$schema = "https://app.kilo.ai/config.json" // kilocode_change
+              const next = yield* loadConfig(JSON.stringify(remoteConfig), {
+                dir: path.dirname(source),
+                source,
+              })
+              yield* merge(source, next, "global")
+              log.debug("loaded remote config from well-known", { url })
+            }).pipe(
               Effect.catch((err: unknown) => {
                 caughtWarning(warnings, source, err)
                 log.warn("skipped remote config due to error", { url, err })
-                return Effect.succeed({} as Info)
+                return Effect.void
               }),
               Effect.catchDefect((err: unknown) => {
                 caughtWarning(warnings, source, err)
                 log.warn("skipped remote config due to error", { url, err })
-                return Effect.succeed({} as Info)
+                return Effect.void
               }),
             )
-            yield* merge(source, next, "global")
             // kilocode_change end
           }
         }

packages/opencode/src/control-plane/workspace.ts

@@ -1,10 +1,11 @@
-import { Context, Effect, FiberMap, Layer, Schema, Stream } from "effect"
+import { Context, Effect, FiberMap, Iterable, Layer, Schema, Stream } from "effect"
 import { FetchHttpClient, HttpBody, HttpClient, HttpClientError, HttpClientRequest } from "effect/unstable/http"
 import { Database } from "@/storage/db"
 import { asc } from "drizzle-orm"
 import { eq } from "drizzle-orm"
 import { inArray } from "drizzle-orm"
 import { Project } from "@/project/project"
+import { Instance } from "@/project/instance"
 import { BusEvent } from "@/bus/bus-event"
 import { GlobalBus } from "@/bus/global"
 import { Auth } from "@/auth"
@@ -17,17 +18,22 @@ import { ProjectID } from "@/project/schema"
 import { Slug } from "@opencode-ai/core/util/slug"
 import { WorkspaceTable } from "./workspace.sql"
 import { getAdapter } from "./adapters"
-import { type WorkspaceInfo, WorkspaceInfo as WorkspaceInfoSchema } from "./types"
+import { type Target, type WorkspaceInfo, WorkspaceInfo as WorkspaceInfoSchema } from "./types"
 import { WorkspaceID } from "./schema"
 import { Session } from "@/session/session"
+import { SessionPrompt } from "@/session/prompt"
 import { SessionTable } from "@/session/session.sql"
 import { SessionID } from "@/session/schema"
+import { NotFoundError } from "@/storage/storage"
 import { errorData } from "@/util/error"
 import { waitEvent } from "./util"
 import { WorkspaceContext } from "./workspace-context"
 import { EffectBridge } from "@/effect/bridge"
-import { NonNegativeInt, withStatics } from "@/util/schema"
+import { withStatics } from "@/util/schema"
 import { zod as effectZod, zodObject } from "@/util/effect-zod"
+import { Vcs } from "@/project/vcs"
+import { InstanceStore } from "@/project/instance-store"
+import { InstanceBootstrap } from "@/project/bootstrap"
 
 export const Info = WorkspaceInfoSchema
 export type Info = WorkspaceInfo
@@ -38,13 +44,6 @@ export const ConnectionStatus = Schema.Struct({
 })
 export type ConnectionStatus = Schema.Schema.Type<typeof ConnectionStatus>
 
-const Restore = Schema.Struct({
-  workspaceID: WorkspaceID,
-  sessionID: SessionID,
-  total: NonNegativeInt,
-  step: NonNegativeInt,
-})
-
 export const Event = {
   Ready: BusEvent.define(
     "workspace.ready",
@@ -58,7 +57,6 @@ export const Event = {
       message: Schema.String,
     }),
   ),
-  Restore: BusEvent.define("workspace.restore", Restore),
   Status: BusEvent.define("workspace.status", ConnectionStatus),
 }
 
@@ -84,15 +82,16 @@ export const CreateInput = Schema.Struct({
   type: Info.fields.type,
   branch: Info.fields.branch,
   projectID: ProjectID,
-  extra: Info.fields.extra,
+  extra: Schema.optional(Info.fields.extra),
 }).pipe(withStatics((s) => ({ zod: effectZod(s), zodObject: zodObject(s) })))
 export type CreateInput = Schema.Schema.Type<typeof CreateInput>
 
-export const SessionRestoreInput = Schema.Struct({
-  workspaceID: WorkspaceID,
+export const SessionWarpInput = Schema.Struct({
+  workspaceID: Schema.NullOr(WorkspaceID),
   sessionID: SessionID,
+  copyChanges: Schema.optional(Schema.Boolean),
 }).pipe(withStatics((s) => ({ zod: effectZod(s), zodObject: zodObject(s) })))
-export type SessionRestoreInput = Schema.Schema.Type<typeof SessionRestoreInput>
+export type SessionWarpInput = Schema.Schema.Type<typeof SessionWarpInput>
 
 export class SyncHttpError extends Schema.TaggedErrorClass<SyncHttpError>()("WorkspaceSyncHttpError", {
   message: Schema.String,
@@ -116,8 +115,8 @@ export class SessionEventsNotFoundError extends Schema.TaggedErrorClass<SessionE
   },
 ) {}
 
-export class SessionRestoreHttpError extends Schema.TaggedErrorClass<SessionRestoreHttpError>()(
-  "WorkspaceSessionRestoreHttpError",
+export class SessionWarpHttpError extends Schema.TaggedErrorClass<SessionWarpHttpError>()(
+  "WorkspaceSessionWarpHttpError",
   {
     message: Schema.String,
     workspaceID: WorkspaceID,
@@ -138,17 +137,18 @@ export class SyncAbortedError extends Schema.TaggedErrorClass<SyncAbortedError>(
 }) {}
 
 type CreateError = Auth.AuthError
-type SessionRestoreError =
+type SessionWarpError =
   | WorkspaceNotFoundError
   | SessionEventsNotFoundError
-  | SessionRestoreHttpError
+  | SessionWarpHttpError
+  | Vcs.PatchApplyError
   | HttpClientError.HttpClientError
 type WaitForSyncError = SyncTimeoutError | SyncAbortedError
 type SyncLoopError = SyncHttpError | HttpClientError.HttpClientError
 
 export interface Interface {
   readonly create: (input: CreateInput) => Effect.Effect<Info, CreateError>
-  readonly sessionRestore: (input: SessionRestoreInput) => Effect.Effect<{ total: number }, SessionRestoreError>
+  readonly sessionWarp: (input: SessionWarpInput) => Effect.Effect<void, SessionWarpError>
   readonly list: (project: Project.Info) => Effect.Effect<Info[]>
   readonly get: (id: WorkspaceID) => Effect.Effect<Info | undefined>
   readonly remove: (id: WorkspaceID) => Effect.Effect<Info | undefined>
@@ -169,8 +169,10 @@ export const layer = Layer.effect(
   Effect.gen(function* () {
     const auth = yield* Auth.Service
     const session = yield* Session.Service
+    const prompt = yield* SessionPrompt.Service
     const http = yield* HttpClient.HttpClient
     const sync = yield* SyncEvent.Service
+    const vcs = yield* Vcs.Service
     const connections = new Map<WorkspaceID, ConnectionStatus>()
     const syncFibers = yield* FiberMap.make<WorkspaceID, void, SyncLoopError>()
 
@@ -259,6 +261,66 @@ export const layer = Layer.effect(
       )
     })
 
+    const runInWorkspace = <A, E, R>(input: {
+      workspaceID?: WorkspaceID
+      local: () => Effect.Effect<A, E, R>
+      remote: (input: {
+        workspace: Info
+        target: Extract<Target, { type: "remote" }>
+      }) => HttpClientRequest.HttpClientRequest
+      fallback: A
+      response?: "json" | "text"
+    }) =>
+      Effect.gen(function* () {
+        if (!input.workspaceID) return yield* input.local()
+
+        const workspace = yield* get(input.workspaceID)
+        if (!workspace) return input.fallback
+
+        const adapter = getAdapter(workspace.projectID, workspace.type)
+        const target = yield* EffectBridge.fromPromise(() => adapter.target(workspace))
+
+        if (target.type === "local") {
+          const store = yield* InstanceStore.Service
+          return yield* store.provide({ directory: target.directory }, input.local())
+        }
+
+        const response = yield* http.execute(input.remote({ workspace, target })).pipe(
+          Effect.catch((error) =>
+            Effect.sync(() => {
+              log.warn("workspace target request failed", {
+                workspaceID: workspace.id,
+                error: errorData(error),
+              })
+            }),
+          ),
+        )
+        if (!response) return input.fallback
+        if (response.status < 200 || response.status >= 300) {
+          const body = yield* response.text.pipe(Effect.catch(() => Effect.succeed("")))
+          log.warn("workspace target request failed", {
+            workspaceID: workspace.id,
+            status: response.status,
+            body,
+          })
+          return input.fallback
+        }
+
+        const body = input.response === "text" ? response.text : response.json
+        return yield* body.pipe(
+          Effect.map((result) => result as A),
+          Effect.catch((error) =>
+            Effect.sync(() => {
+              log.warn("workspace target response decode failed", {
+                workspaceID: workspace.id,
+                error: errorData(error),
+              })
+              return input.fallback
+            }),
+          ),
+        )
+      })
+
     const syncHistory = Effect.fn("Workspace.syncHistory")(function* (
       space: Info,
       url: URL | string,
@@ -461,7 +523,7 @@ export const layer = Layer.effect(
       const id = WorkspaceID.ascending(input.id)
       const adapter = getAdapter(input.projectID, input.type)
       const config = yield* EffectBridge.fromPromise(() =>
-        adapter.configure({ ...input, id, name: Slug.create(), directory: null }),
+        adapter.configure({ ...input, id, name: Slug.create(), directory: null, extra: input.extra ?? null }),
       )
 
       const info: Info = {
@@ -518,29 +580,123 @@ export const layer = Layer.effect(
       return info
     })
 
-    const sessionRestore = Effect.fn("Workspace.sessionRestore")(function* (input: SessionRestoreInput) {
+    const sessionWarp = Effect.fn("Workspace.sessionWarp")(function* (input: SessionWarpInput) {
       return yield* Effect.gen(function* () {
-        log.info("session restore requested", {
+        log.info("session warp requested", {
           workspaceID: input.workspaceID,
           sessionID: input.sessionID,
         })
 
-        const space = yield* get(input.workspaceID)
+        const current = yield* db((db) =>
+          db
+            .select({ workspaceID: SessionTable.workspace_id })
+            .from(SessionTable)
+            .where(eq(SessionTable.id, input.sessionID))
+            .get(),
+        )
+
+        if (current?.workspaceID) {
+          const previous = yield* get(current.workspaceID)
+          if (previous) {
+            const adapter = getAdapter(previous.projectID, previous.type)
+            const target = yield* EffectBridge.fromPromise(() => adapter.target(previous))
+
+            if (target.type === "remote") {
+              yield* syncHistory(previous, target.url, target.headers).pipe(
+                Effect.catch((error) =>
+                  Effect.sync(() => {
+                    log.warn("session warp final source sync failed", {
+                      workspaceID: previous.id,
+                      sessionID: input.sessionID,
+                      error: errorData(error),
+                    })
+                  }),
+                ),
+              )
+            } else {
+              yield* prompt.cancel(input.sessionID)
+            }
+
+            // "claim" this session so any future events coming from
+            // the old workspace are ignored
+            SyncEvent.claim(input.sessionID, input.workspaceID ?? Instance.project.id)
+          }
+        }
+
+        const sourcePatch =
+          input.copyChanges && current?.workspaceID
+            ? yield* runInWorkspace({
+                workspaceID: current?.workspaceID ?? undefined,
+                local: () => vcs.diffRaw(),
+                remote: ({ target }) =>
+                  HttpClientRequest.get(route(target.url, "/vcs/diff/raw"), {
+                    headers: new Headers(target.headers),
+                  }),
+                fallback: "",
+                response: "text",
+              }).pipe(Effect.provide(InstanceStore.defaultLayer.pipe(Layer.provide(InstanceBootstrap.defaultLayer))))
+            : ""
+
+        if (sourcePatch) {
+          // Attempt to apply the file changes to the new workspace.
+          // We intentionally do first so if it fails we don't warp
+          // the session.
+          yield* runInWorkspace({
+            workspaceID: input.workspaceID ?? undefined,
+            local: () => vcs.apply({ patch: sourcePatch }),
+            remote: ({ target }) =>
+              HttpClientRequest.post(route(target.url, "/vcs/apply"), {
+                headers: new Headers(target.headers),
+                body: HttpBody.jsonUnsafe({ patch: sourcePatch }),
+              }),
+            fallback: { applied: false },
+          }).pipe(Effect.provide(InstanceStore.defaultLayer.pipe(Layer.provide(InstanceBootstrap.defaultLayer))))
+        }
+
+        if (input.workspaceID === null) {
+          yield* Effect.sync(() =>
+            SyncEvent.run(Session.Event.Updated, {
+              sessionID: input.sessionID,
+              info: {
+                workspaceID: null,
+              },
+            }),
+          )
+
+          log.info("session warp complete", {
+            workspaceID: input.workspaceID,
+            sessionID: input.sessionID,
+            target: "local",
+          })
+          return
+        }
+
+        const workspaceID = input.workspaceID
+        const space = yield* get(workspaceID)
         if (!space)
           return yield* new WorkspaceNotFoundError({
-            message: `Workspace not found: ${input.workspaceID}`,
-            workspaceID: input.workspaceID,
+            message: `Workspace not found: ${workspaceID}`,
+            workspaceID,
           })
 
         const adapter = getAdapter(space.projectID, space.type)
         const target = yield* EffectBridge.fromPromise(() => adapter.target(space))
 
-        yield* sync.run(Session.Event.Updated, {
-          sessionID: input.sessionID,
-          info: {
+        if (target.type === "local") {
+          yield* sync.run(Session.Event.Updated, {
+            sessionID: input.sessionID,
+            info: {
+              workspaceID: input.workspaceID,
+            },
+          })
+
+          log.info("session warp complete", {
             workspaceID: input.workspaceID,
-          },
-        })
+            sessionID: input.sessionID,
+            target: target.directory,
+          })
+          return
+        }
 
         const rows = yield* db((db) =>
           db
@@ -562,130 +718,95 @@ export const layer = Layer.effect(
             sessionID: input.sessionID,
           })
 
-        const size = 10
-        // TODO: look into using effect APIs to process this in chunks
-        const sets = Array.from({ length: Math.ceil(rows.length / size) }, (_, i) =>
-          rows.slice(i * size, (i + 1) * size),
-        )
-        const total = sets.length
+        const batches = Iterable.chunksOf(rows, 10)
+        const total = Iterable.size(batches)
 
-        log.info("session restore prepared", {
+        log.info("session warp prepared", {
           workspaceID: input.workspaceID,
           sessionID: input.sessionID,
-          workspaceType: space.type,
-          directory: space.directory,
-          target: target.type === "remote" ? String(route(target.url, "/sync/replay")) : target.directory,
+          target: String(route(target.url, "/sync/replay")),
           events: rows.length,
           batches: total,
           first: rows[0]?.seq,
           last: rows.at(-1)?.seq,
         })
 
-        yield* Effect.sync(() =>
-          GlobalBus.emit("event", {
-            directory: "global",
-            workspace: input.workspaceID,
-            payload: {
-              type: Event.Restore.type,
-              properties: {
-                workspaceID: input.workspaceID,
-                sessionID: input.sessionID,
-                total,
-                step: 0,
-              },
-            },
-          }),
-        )
-
-        for (const [i, events] of sets.entries()) {
-          log.info("session restore batch starting", {
-            workspaceID: input.workspaceID,
-            sessionID: input.sessionID,
-            step: i + 1,
-            total,
-            events: events.length,
-            first: events[0]?.seq,
-            last: events.at(-1)?.seq,
-            target: target.type === "remote" ? String(route(target.url, "/sync/replay")) : target.directory,
-          })
-
-          if (target.type === "local") {
-            yield* sync.replayAll(events)
-            log.info("session restore batch replayed locally", {
-              workspaceID: input.workspaceID,
-              sessionID: input.sessionID,
-              step: i + 1,
-              total,
-              events: events.length,
-            })
-          } else {
-            const url = route(target.url, "/sync/replay")
-            const res = yield* http.execute(
-              HttpClientRequest.post(url, {
-                headers: new Headers(target.headers),
-                body: HttpBody.jsonUnsafe({
-                  directory: space.directory ?? "",
-                  events,
+        yield* Effect.forEach(
+          batches,
+          (events, i) =>
+            Effect.gen(function* () {
+              const response = yield* http.execute(
+                HttpClientRequest.post(route(target.url, "/sync/replay"), {
+                  headers: new Headers(target.headers),
+                  body: HttpBody.jsonUnsafe({
+                    directory: space.directory ?? "",
+                    events,
+                  }),
                 }),
-              }),
-            )
+              )
 
-            if (res.status < 200 || res.status >= 300) {
-              const body = yield* res.text
-              log.error("session restore batch failed", {
+              if (response.status < 200 || response.status >= 300) {
+                const body = yield* response.text
+                log.error("session warp batch failed", {
+                  workspaceID: input.workspaceID,
+                  sessionID: input.sessionID,
+                  step: i + 1,
+                  total,
+                  status: response.status,
+                  body,
+                })
+                return yield* new SessionWarpHttpError({
+                  message: `Failed to warp session ${input.sessionID} into workspace ${workspaceID}: HTTP ${response.status} ${body}`,
+                  workspaceID,
+                  sessionID: input.sessionID,
+                  status: response.status,
+                  body,
+                })
+              }
+
+              log.info("session warp batch posted", {
                 workspaceID: input.workspaceID,
                 sessionID: input.sessionID,
                 step: i + 1,
                 total,
-                status: res.status,
-                body,
+                status: response.status,
               })
-              return yield* new SessionRestoreHttpError({
-                message: `Failed to replay session ${input.sessionID} into workspace ${input.workspaceID}: HTTP ${res.status} ${body}`,
-                workspaceID: input.workspaceID,
-                sessionID: input.sessionID,
-                status: res.status,
-                body,
-              })
-            }
-
-            log.info("session restore batch posted", {
-              workspaceID: input.workspaceID,
-              sessionID: input.sessionID,
-              step: i + 1,
-              total,
-              status: res.status,
-            })
-          }
-
-          yield* Effect.sync(() =>
-            GlobalBus.emit("event", {
-              directory: "global",
-              workspace: input.workspaceID,
-              payload: {
-                type: Event.Restore.type,
-                properties: {
-                  workspaceID: input.workspaceID,
-                  sessionID: input.sessionID,
-                  total,
-                  step: i + 1,
-                },
-              },
             }),
-          )
+          { discard: true },
+        )
+
+        const response = yield* http.execute(
+          HttpClientRequest.post(route(target.url, "/sync/steal"), {
+            headers: new Headers(target.headers),
+            body: HttpBody.jsonUnsafe({ sessionID: input.sessionID }),
+          }),
+        )
+        if (response.status < 200 || response.status >= 300) {
+          const body = yield* response.text
+          log.error("session warp steal failed", {
+            workspaceID: input.workspaceID,
+            sessionID: input.sessionID,
+            status: response.status,
+            body,
+          })
+          return yield* new SessionWarpHttpError({
+            message: `Failed to steal session ${input.sessionID} into workspace ${workspaceID}: HTTP ${response.status} ${body}`,
+            workspaceID,
+            sessionID: input.sessionID,
+            status: response.status,
+            body,
+          })
         }
 
-        log.info("session restore complete", {
+        log.info("session warp complete", {
           workspaceID: input.workspaceID,
           sessionID: input.sessionID,
           batches: total,
         })
-
-        return { total }
       }).pipe(
         Effect.tapError((err) =>
           Effect.sync(() =>
-            log.error("session restore failed", {
+            log.error("session warp failed", {
               workspaceID: input.workspaceID,
               sessionID: input.sessionID,
               error: errorData(err),
@@ -715,9 +836,19 @@ export const layer = Layer.effect(
 
     const remove = Effect.fn("Workspace.remove")(function* (id: WorkspaceID) {
       const sessions = yield* db((db) =>
-        db.select({ id: SessionTable.id }).from(SessionTable).where(eq(SessionTable.workspace_id, id)).all(),
+        db
+          .select({ id: SessionTable.id, parentID: SessionTable.parent_id })
+          .from(SessionTable)
+          .where(eq(SessionTable.workspace_id, id))
+          .all(),
+      )
+      const sessionIDs = new Set(sessions.map((sessionInfo) => sessionInfo.id))
+      yield* Effect.forEach(
+        sessions.filter((sessionInfo) => !sessionInfo.parentID || !sessionIDs.has(sessionInfo.parentID)),
+        (sessionInfo) =>
+          session.remove(sessionInfo.id).pipe(Effect.catchIf(NotFoundError.isInstance, () => Effect.void)),
+        { discard: true },
       )
-      yield* Effect.forEach(sessions, (sessionInfo) => session.remove(sessionInfo.id), { discard: true })
 
       const row = yield* db((db) => db.select().from(WorkspaceTable).where(eq(WorkspaceTable.id, id)).get())
       if (!row) return
@@ -814,7 +945,7 @@ export const layer = Layer.effect(
 
     return Service.of({
       create,
-      sessionRestore,
+      sessionWarp,
       list,
       get,
       remove,
@@ -830,6 +961,9 @@ export const defaultLayer = layer.pipe(
   Layer.provide(Auth.defaultLayer),
   Layer.provide(Session.defaultLayer),
   Layer.provide(SyncEvent.defaultLayer),
+  Layer.provide(SessionPrompt.defaultLayer),
+  Layer.provide(Project.defaultLayer),
+  Layer.provide(Vcs.defaultLayer),
   Layer.provide(FetchHttpClient.layer),
 )
 

packages/opencode/src/format/index.ts

@@ -91,6 +91,9 @@ export const layer = Layer.effect(
                     cwd: dir,
                     env: item.environment,
                     extendEnv: true,
+                    stdin: "ignore",
+                    stdout: "ignore",
+                    stderr: "ignore",
                   }),
                 )
                 .pipe(

packages/opencode/src/git/index.ts

@@ -69,6 +69,7 @@ export interface Options {
   readonly cwd: string
   readonly env?: Record<string, string>
   readonly maxOutputBytes?: number
+  readonly stdin?: ChildProcess.CommandInput
 }
 
 export interface Interface {
@@ -86,6 +87,7 @@ export interface Interface {
   readonly patchAll: (cwd: string, ref: string, options?: PatchOptions) => Effect.Effect<Patch>
   readonly patchUntracked: (cwd: string, file: string, options?: PatchOptions) => Effect.Effect<Patch>
   readonly statUntracked: (cwd: string, file: string) => Effect.Effect<Stat | undefined>
+  readonly applyPatch: (cwd: string, patch: string) => Effect.Effect<Result>
 }
 
 const kind = (code: string): Kind => {
@@ -102,6 +104,8 @@ export const layer = Layer.effect(
   Service,
   Effect.gen(function* () {
     const spawner = yield* ChildProcessSpawner.ChildProcessSpawner
+    const encoder = new TextEncoder()
+    const stdin = (text: string) => Stream.make(encoder.encode(text))
 
     const run = Effect.fn("Git.run")(
       function* (args: string[], opts: Options) {
@@ -109,7 +113,7 @@ export const layer = Layer.effect(
           cwd: opts.cwd,
           env: opts.env,
           extendEnv: true,
-          stdin: "ignore",
+          stdin: opts.stdin ?? "ignore",
           stdout: "pipe",
           stderr: "pipe",
         })
@@ -317,9 +321,13 @@ export const layer = Layer.effect(
         cwd,
         maxOutputBytes: 4096,
       })
+
       if (result.truncated) return
-      const parts = result.text().split("\t")
+      const text = result.text()
+
+      const parts = text.split("\t")
       if (parts.length < 2) return
+
       const additions = parts[0] === "-" ? 0 : Number.parseInt(parts[0] || "0", 10)
       const deletions = parts[1] === "-" ? 0 : Number.parseInt(parts[1] || "0", 10)
       return {
@@ -329,6 +337,10 @@ export const layer = Layer.effect(
       } satisfies Stat
     })
 
+    const applyPatch = Effect.fn("Git.applyPatch")(function* (cwd: string, patch: string) {
+      return yield* run(["apply", "-"], { cwd, stdin: stdin(patch) })
+    })
+
     return Service.of({
       run,
       branch,
@@ -344,6 +356,7 @@ export const layer = Layer.effect(
       patchAll,
       patchUntracked,
       statUntracked,
+      applyPatch,
     })
   }),
 )

packages/opencode/src/id/id.ts

@@ -14,6 +14,7 @@ const prefixes = {
   tool: "tool",
   workspace: "wrk",
   entry: "ent",
+  account: "act",
 } as const
 
 export function schema(prefix: keyof typeof prefixes) {

packages/opencode/src/project/vcs.ts

@@ -6,7 +6,7 @@ import { InstanceState } from "@/effect/instance-state"
 import { FileWatcher } from "@/file/watcher"
 import { Git } from "@/git"
 import * as Log from "@opencode-ai/core/util/log"
-import { zod } from "@/util/effect-zod"
+import { zod, zodObject } from "@/util/effect-zod"
 import { makeRuntime } from "@/effect/run-service" // kilocode_change
 import { NonNegativeInt, withStatics } from "@/util/schema"
 
@@ -86,7 +86,9 @@ const fileFromPatchChunk = (chunk: string) => {
 }
 
 const splitGitPatch = (patch: Git.Patch) => {
-  const starts = [...patch.text.matchAll(/^diff --git /gm)].map((match) => match.index)
+  const starts = [...patch.text.matchAll(/(?:^|\n)diff --git /g)].map((match) =>
+    match[0].startsWith("\n") ? match.index + 1 : match.index,
+  )
   const chunks = starts.map((start, index) => patch.text.slice(start, starts[index + 1] ?? patch.text.length))
   if (!patch.truncated) return chunks
   return chunks.slice(0, -1)
@@ -238,11 +240,39 @@ export const FileDiff = Schema.Struct({
   .pipe(withStatics((s) => ({ zod: zod(s) })))
 export type FileDiff = Schema.Schema.Type<typeof FileDiff>
 
+export const FileStatus = Schema.Struct({
+  file: Schema.String,
+  additions: NonNegativeInt,
+  deletions: NonNegativeInt,
+  status: Schema.Literals(["added", "deleted", "modified"]),
+})
+  .annotate({ identifier: "VcsFileStatus" })
+  .pipe(withStatics((s) => ({ zod: zod(s) })))
+export type FileStatus = Schema.Schema.Type<typeof FileStatus>
+
+export const ApplyInput = Schema.Struct({
+  patch: Schema.String,
+}).pipe(withStatics((s) => ({ zod: zod(s), zodObject: zodObject(s) })))
+export type ApplyInput = Schema.Schema.Type<typeof ApplyInput>
+
+export const ApplyResult = Schema.Struct({
+  applied: Schema.Boolean,
+}).pipe(withStatics((s) => ({ zod: zod(s) })))
+export type ApplyResult = Schema.Schema.Type<typeof ApplyResult>
+
+export class PatchApplyError extends Schema.TaggedErrorClass<PatchApplyError>()("VcsPatchApplyError", {
+  message: Schema.String,
+  reason: Schema.Literals(["non-git", "not-clean"]),
+}) {}
+
 export interface Interface {
   readonly init: () => Effect.Effect<void>
   readonly branch: () => Effect.Effect<string | undefined>
   readonly defaultBranch: () => Effect.Effect<string | undefined>
+  readonly status: () => Effect.Effect<FileStatus[]>
   readonly diff: (mode: Mode) => Effect.Effect<FileDiff[]>
+  readonly diffRaw: () => Effect.Effect<string>
+  readonly apply: (input: ApplyInput) => Effect.Effect<ApplyResult, PatchApplyError>
 }
 
 interface State {
@@ -303,6 +333,31 @@ export const layer: Layer.Layer<Service, never, Git.Service | Bus.Service> = Lay
       defaultBranch: Effect.fn("Vcs.defaultBranch")(function* () {
         return yield* InstanceState.use(state, (x) => x.root?.name)
       }),
+      status: Effect.fn("Vcs.status")(function* () {
+        const ctx = yield* InstanceState.context
+        if (ctx.project.vcs !== "git") return []
+        const ref = (yield* git.hasHead(ctx.directory)) ? "HEAD" : undefined
+        const [list, stats] = yield* Effect.all(
+          [git.status(ctx.directory), ref ? git.stats(ctx.directory, ref) : Effect.succeed([])],
+          { concurrency: 2 },
+        )
+        const map = nums(stats)
+        return yield* Effect.forEach(
+          list.toSorted((a, b) => a.file.localeCompare(b.file)),
+          (item) =>
+            Effect.gen(function* () {
+              const stat =
+                map.get(item.file) ??
+                (item.status === "added" ? yield* git.statUntracked(ctx.worktree, item.file) : undefined)
+              return {
+                file: item.file,
+                additions: stat?.additions ?? 0,
+                deletions: stat?.deletions ?? 0,
+                status: item.status,
+              } satisfies FileStatus
+            }),
+        )
+      }),
       diff: Effect.fn("Vcs.diff")(function* (mode: Mode) {
         const value = yield* InstanceState.get(state)
         const ctx = yield* InstanceState.context
@@ -317,6 +372,36 @@ export const layer: Layer.Layer<Service, never, Git.Service | Bus.Service> = Lay
         if (!ref) return []
         return yield* diffAgainstRef(git, ctx.directory, ref)
       }),
+      diffRaw: Effect.fn("Vcs.diffRaw")(function* () {
+        const ctx = yield* InstanceState.context
+        if (ctx.project.vcs !== "git") return ""
+        const [hasHead, status] = yield* Effect.all([git.hasHead(ctx.directory), git.status(ctx.directory)], {
+          concurrency: 2,
+        })
+        const tracked = hasHead ? (yield* git.patchAll(ctx.directory, "HEAD")).text : ""
+        const untracked = yield* Effect.forEach(
+          status.filter((item) => item.code === "??"),
+          (item) => git.patchUntracked(ctx.directory, item.file).pipe(Effect.map((patch) => patch.text)),
+        )
+        return [tracked, ...untracked].filter(Boolean).join("\n")
+      }),
+      apply: Effect.fn("Vcs.apply")(function* (input: ApplyInput) {
+        const ctx = yield* InstanceState.context
+        if (ctx.project.vcs !== "git") {
+          return yield* new PatchApplyError({
+            message: "Patch can't be applied because the project is not git-based",
+            reason: "non-git",
+          })
+        }
+        const applied = yield* git.applyPatch(ctx.directory, input.patch)
+        if (applied.exitCode !== 0) {
+          return yield* new PatchApplyError({
+            message: "Patch can't be applied",
+            reason: "not-clean",
+          })
+        }
+        return { applied: true }
+      }),
     })
   }),
 )

packages/opencode/src/provider/error.ts

@@ -156,6 +156,7 @@ export function parseStreamError(input: unknown): ParsedStreamError | undefined
         isRetryable: false,
         responseBody,
       }
+    case "server_is_overloaded":
     case "server_error":
       return {
         type: "api_error",

packages/opencode/src/provider/transform.ts

@@ -1,4 +1,4 @@
-import type { ModelMessage } from "ai"
+import type { ModelMessage, ToolResultPart } from "ai"
 import { mergeDeep, unique } from "remeda"
 import type { JSONSchema7 } from "@ai-sdk/provider"
 import type { JSONSchema } from "zod/v4/core"
@@ -21,6 +21,10 @@ function mimeToModality(mime: string): Modality | undefined {
 
 export const OUTPUT_TOKEN_MAX = Flag.KILO_EXPERIMENTAL_OUTPUT_TOKEN_MAX || 32_000
 
+export function sanitizeSurrogates(content: string) {
+  return content.replace(/[\uD800-\uDBFF](?![\uDC00-\uDFFF])|(?<![\uD800-\uDBFF])[\uDC00-\uDFFF]/g, "\uFFFD")
+}
+
 // Maps npm package to the key the AI SDK expects for providerOptions
 function sdkKey(npm: string): string | undefined {
   switch (npm) {
@@ -45,15 +49,85 @@ function sdkKey(npm: string): string | undefined {
       return "openrouter"
     case "@kilocode/kilo-gateway": // kilocode_change
       return "openrouter"
+    case "ai-gateway-provider":
+      // ai-gateway-provider/unified wraps createOpenAICompatible({ name: "Unified" }),
+      // and @ai-sdk/openai-compatible parses compatibleOptions from one of
+      // "openai-compatible" / "openaiCompatible" / "Unified" / "unified". The
+      // "openai-compatible" key emits a deprecation warning at runtime, so we
+      // pick the camelCase form the SDK now treats as canonical.
+      return "openaiCompatible"
   }
   return undefined
 }
 
+// TODO: fix this stupid inefficient dogshit function
 function normalizeMessages(
   msgs: ModelMessage[],
   model: Provider.Model,
   _options: Record<string, unknown>,
 ): ModelMessage[] {
+  const sanitizeToolResultOutput = (content: ToolResultPart) => {
+    if (content.output.type === "text" || content.output.type === "error-text") {
+      content.output.value = sanitizeSurrogates(content.output.value)
+    }
+    if (content.output.type === "content") {
+      content.output.value = content.output.value.map((item) => {
+        if (item.type === "text") {
+          item.text = sanitizeSurrogates(item.text)
+        }
+        return item
+      })
+    }
+    return content
+  }
+
+  msgs = msgs.map((msg) => {
+    switch (msg.role) {
+      case "tool":
+        if (!Array.isArray(msg.content)) return msg
+        msg.content = msg.content.map((content) => {
+          if (content.type === "tool-result") {
+            return sanitizeToolResultOutput(content)
+          }
+          return content
+        })
+        return msg
+
+      case "system":
+        msg.content = sanitizeSurrogates(msg.content)
+        return msg
+
+      case "user":
+        if (typeof msg.content === "string") {
+          msg.content = sanitizeSurrogates(msg.content)
+        } else {
+          msg.content = msg.content.map((content) => {
+            if (content.type === "text") {
+              content.text = sanitizeSurrogates(content.text)
+            }
+            return content
+          })
+        }
+        return msg
+
+      case "assistant":
+        if (typeof msg.content === "string") {
+          msg.content = sanitizeSurrogates(msg.content)
+        } else {
+          msg.content = msg.content.map((content) => {
+            if (content.type === "text" || content.type === "reasoning") {
+              content.text = sanitizeSurrogates(content.text)
+            }
+            if (content.type === "tool-result") {
+              return sanitizeToolResultOutput(content)
+            }
+            return content
+          })
+        }
+        return msg
+    }
+  })
+
   // Anthropic rejects messages with empty content - filter out empty string messages
   // and remove empty text/reasoning parts from array content
   if (model.api.npm === "@ai-sdk/anthropic") {
@@ -437,6 +511,36 @@ export function topK(model: Provider.Model) {
 const WIDELY_SUPPORTED_EFFORTS = ["low", "medium", "high"]
 const OPENAI_EFFORTS = ["none", "minimal", ...WIDELY_SUPPORTED_EFFORTS, "xhigh"]
 
+// OpenAI rolled out the `none` reasoning_effort tier on this date (Responses API).
+// Models released before it 400 on `reasoning_effort: "none"`, so we only expose
+// it as a variant for models new enough to accept it.
+const OPENAI_NONE_EFFORT_RELEASE_DATE = "2025-11-13"
+
+// OpenAI rolled out the `xhigh` reasoning_effort tier on this date. Same reasoning.
+const OPENAI_XHIGH_EFFORT_RELEASE_DATE = "2025-12-04"
+
+// Matches members of the gpt-5 family across the id formats we encounter:
+//   "gpt-5", "gpt-5-nano", "gpt-5.4", "openai/gpt-5.4-codex".
+// Anchored to start-of-string or "/" so it doesn't false-match "gpt-50" or "gpt-5o".
+const GPT5_FAMILY_RE = /(?:^|\/)gpt-5(?:[.-]|$)/
+
+// Computes the reasoning_effort tiers an OpenAI (or OpenAI-compatible upstream
+// routed through it, e.g. cf-ai-gateway) model exposes. Returns null for models
+// with no tunable effort knob (gpt-5-pro). Effort order: weakest to strongest.
+function openaiReasoningEfforts(apiId: string, releaseDate: string): string[] | null {
+  const id = apiId.toLowerCase()
+  if (id === "gpt-5-pro" || id === "openai/gpt-5-pro") return null
+  if (id.includes("codex")) {
+    if (id.includes("5.2") || id.includes("5.3")) return [...WIDELY_SUPPORTED_EFFORTS, "xhigh"]
+    return [...WIDELY_SUPPORTED_EFFORTS]
+  }
+  const efforts = [...WIDELY_SUPPORTED_EFFORTS]
+  if (GPT5_FAMILY_RE.test(id)) efforts.unshift("minimal")
+  if (releaseDate >= OPENAI_NONE_EFFORT_RELEASE_DATE) efforts.unshift("none")
+  if (releaseDate >= OPENAI_XHIGH_EFFORT_RELEASE_DATE) efforts.push("xhigh")
+  return efforts
+}
+
 function anthropicAdaptiveEfforts(apiId: string): string[] | null {
   if (["opus-4-7", "opus-4.7"].some((v) => apiId.includes(v))) {
     return ["low", "medium", "high", "xhigh", "max"]
@@ -514,6 +618,21 @@ export function variants(model: Provider.Model): Record<string, Record<string, a
         return {}
       return Object.fromEntries(OPENAI_EFFORTS.map((effort) => [effort, { reasoning: { effort } }]))
 
+    case "ai-gateway-provider": {
+      // Cloudflare AI Gateway routes every upstream through its OpenAI-compatible
+      // /v1/compat endpoint, so the body is always OAI-shaped. The gateway
+      // translates `reasoning_effort` to the upstream provider's native control
+      // (e.g. Anthropic thinking budgets) when needed. Variants therefore stay
+      // OAI-style for all upstreams, with an extended effort set for OpenAI
+      // models that support it.
+      if (model.api.id.startsWith("openai/")) {
+        const efforts = openaiReasoningEfforts(model.api.id, model.release_date)
+        if (!efforts) return {}
+        return Object.fromEntries(efforts.map((effort) => [effort, { reasoningEffort: effort }]))
+      }
+      return Object.fromEntries(WIDELY_SUPPORTED_EFFORTS.map((effort) => [effort, { reasoningEffort: effort }]))
+    }
+
     case "@ai-sdk/gateway":
       if (model.id.includes("anthropic")) {
         if (adaptiveEfforts) {
@@ -638,28 +757,12 @@ export function variants(model: Provider.Model): Record<string, Record<string, a
           },
         ]),
       )
-    case "@ai-sdk/openai":
+    case "@ai-sdk/openai": {
       // https://v5.ai-sdk.dev/providers/ai-sdk-providers/openai
-      if (id === "gpt-5-pro") return {}
-      const openaiEfforts = iife(() => {
-        if (id.includes("codex")) {
-          if (id.includes("5.2") || id.includes("5.3")) return [...WIDELY_SUPPORTED_EFFORTS, "xhigh"]
-          return WIDELY_SUPPORTED_EFFORTS
-        }
-        const arr = [...WIDELY_SUPPORTED_EFFORTS]
-        if (id.includes("gpt-5-") || id === "gpt-5") {
-          arr.unshift("minimal")
-        }
-        if (model.release_date >= "2025-11-13") {
-          arr.unshift("none")
-        }
-        if (model.release_date >= "2025-12-04") {
-          arr.push("xhigh")
-        }
-        return arr
-      })
+      const efforts = openaiReasoningEfforts(model.api.id, model.release_date)
+      if (!efforts) return {}
       return Object.fromEntries(
-        openaiEfforts.map((effort) => [
+        efforts.map((effort) => [
           effort,
           {
             reasoningEffort: effort,
@@ -668,6 +771,7 @@ export function variants(model: Provider.Model): Record<string, Record<string, a
           },
         ]),
       )
+    }
 
     case "@ai-sdk/anthropic":
     // https://v5.ai-sdk.dev/providers/ai-sdk-providers/anthropic
@@ -804,7 +908,12 @@ export function variants(model: Provider.Model): Record<string, Record<string, a
       // https://docs.mistral.ai/capabilities/reasoning/adjustable
       if (!model.capabilities.reasoning) return {}
       // Only Mistral Small 4 and Medium 3.5 support reasoning
-      const MISTRAL_REASONING_IDS = ["mistral-small-2603", "mistral-small-latest", "mistral-medium-3.5"]
+      const MISTRAL_REASONING_IDS = [
+        "mistral-small-2603",
+        "mistral-small-latest",
+        "mistral-medium-3.5",
+        "mistral-medium-2604",
+      ]
       const mistralId = model.api.id.toLowerCase()
       if (!MISTRAL_REASONING_IDS.some((id) => mistralId.includes(id))) return {}
       return {

packages/opencode/src/server/adapter.node.ts

@@ -1,3 +1,4 @@
+import { EventEmitter } from "node:events"
 import { createAdaptorServer, type ServerType } from "@hono/node-server"
 import { createNodeWebSocket } from "@hono/node-ws"
 import type { Hono } from "hono"
@@ -7,6 +8,7 @@ async function listen(app: FetchApp, opts: Opts, inject?: (server: ServerType) =
   const start = (port: number) =>
     new Promise<ServerType>((resolve, reject) => {
       const server = createAdaptorServer({ fetch: app.fetch })
+      const events = server as EventEmitter
       inject?.(server)
       const fail = (err: Error) => {
         cleanup()
@@ -17,11 +19,11 @@ async function listen(app: FetchApp, opts: Opts, inject?: (server: ServerType) =
         resolve(server)
       }
       const cleanup = () => {
-        server.off("error", fail)
-        server.off("listening", ready)
+        events.off("error", fail)
+        events.off("listening", ready)
       }
-      server.once("error", fail)
-      server.once("listening", ready)
+      events.once("error", fail)
+      events.once("listening", ready)
       server.listen(port, opts.hostname)
     })
 

packages/opencode/src/server/routes/control/workspace.ts

@@ -8,12 +8,9 @@ import { AppRuntime } from "@/effect/app-runtime"
 import { WorkspaceAdapterEntry } from "@/control-plane/types"
 import { zodObject } from "@/util/effect-zod"
 import { Instance } from "@/project/instance"
+import { Vcs } from "@/project/vcs"
 import { errors } from "../../error"
 import { lazy } from "@/util/lazy"
-import * as Log from "@opencode-ai/core/util/log"
-import { errorData } from "@/util/error"
-
-const log = Log.create({ service: "server.workspace" })
 
 export const WorkspaceRoutes = lazy(() =>
   new Hono()
@@ -151,60 +148,64 @@ export const WorkspaceRoutes = lazy(() =>
       },
     )
     .post(
-      "/:id/session-restore",
+      "/warp",
       describeRoute({
-        summary: "Restore session into workspace",
-        description: "Replay a session's sync events into the target workspace in batches.",
-        operationId: "experimental.workspace.sessionRestore",
+        summary: "Warp session into workspace",
+        description: "Move a session's sync history into the target workspace, or detach it to the local project.",
+        operationId: "experimental.workspace.warp",
         responses: {
-          200: {
-            description: "Session replay started",
-            content: {
-              "application/json": {
-                schema: resolver(
-                  z.object({
-                    total: z.number().int().min(0),
-                  }),
-                ),
-              },
-            },
+          204: {
+            description: "Session warped",
           },
           ...errors(400),
         },
       }),
-      validator("param", z.object({ id: zodObject(Workspace.Info).shape.id })),
-      validator("json", Workspace.SessionRestoreInput.zodObject.omit({ workspaceID: true })),
+      validator(
+        "json",
+        z.object({
+          id: zodObject(Workspace.Info).shape.id.nullable(),
+          sessionID: Workspace.SessionWarpInput.zodObject.shape.sessionID,
+          copyChanges: z.boolean().optional(),
+        }),
+      ),
       async (c) => {
-        const { id } = c.req.valid("param")
-        const body = c.req.valid("json") as Omit<Workspace.SessionRestoreInput, "workspaceID">
-        log.info("session restore route requested", {
-          workspaceID: id,
-          sessionID: body.sessionID,
-          directory: Instance.directory,
-        })
-        try {
-          const result = await AppRuntime.runPromise(
-            Workspace.Service.use((svc) =>
-              svc.sessionRestore({
-                workspaceID: id,
-                ...body,
-              }),
-            ),
-          )
-          log.info("session restore route complete", {
-            workspaceID: id,
-            sessionID: body.sessionID,
-            total: result.total,
-          })
-          return c.json(result)
-        } catch (err) {
-          log.error("session restore route failed", {
-            workspaceID: id,
-            sessionID: body.sessionID,
-            error: errorData(err),
-          })
-          throw err
-        }
+        const body = c.req.valid("json")
+        return AppRuntime.runPromise(
+          Workspace.Service.use((workspace) =>
+            workspace.sessionWarp({
+              workspaceID: body.id,
+              sessionID: body.sessionID,
+              copyChanges: body.copyChanges,
+            }),
+          ).pipe(
+            Effect.match({
+              onFailure: (error) => {
+                if (error instanceof Vcs.PatchApplyError) {
+                  return c.json(
+                    {
+                      name: "VcsApplyError",
+                      data: {
+                        message: error.message,
+                        reason: error.reason,
+                      },
+                    },
+                    400,
+                  )
+                }
+                return c.json(
+                  {
+                    name: "WorkspaceWarpError",
+                    data: {
+                      message: error.message,
+                    },
+                  },
+                  400,
+                )
+              },
+              onSuccess: () => c.body(null, 204),
+            }),
+          ),
+        )
       },
     ),
 )

packages/opencode/src/server/routes/instance/httpapi/AGENTS.md

@@ -32,4 +32,6 @@ Avoid `HttpRouter.provideRequest(...)` unless the dependency is intentionally re
 
 Use `Effect.provideService(...)` in middleware only for request-derived context, such as `WorkspaceRouteContext`, `InstanceRef`, or `WorkspaceRef`. Do not use it to smuggle stable services through request effects when they can be yielded at layer construction.
 
+Public JSON errors should be explicit `Schema.ErrorClass` contracts declared on each endpoint. Use built-in `HttpApiError.*` classes only when their empty/tagged body is the intended wire shape; for SDK-visible errors with messages, define an API error schema such as `ApiNotFoundError` and fail with that exact declared error. Keep domain and storage services free of HttpApi types, and translate expected domain errors at the handler boundary.
+
 When adding middleware, compose it at the layer boundary and keep the route tree explicit in `server.ts`. Shared router middleware such as auth, workspace routing, and instance context should stay visible where routes are assembled.

packages/opencode/src/server/routes/instance/httpapi/errors.ts

@@ -0,0 +1,18 @@
+import { Schema } from "effect"
+
+export class ApiNotFoundError extends Schema.ErrorClass<ApiNotFoundError>("NotFoundError")(
+  {
+    name: Schema.Literal("NotFoundError"),
+    data: Schema.Struct({
+      message: Schema.String,
+    }),
+  },
+  { httpApiStatus: 404 },
+) {}
+
+export function notFound(message: string) {
+  return new ApiNotFoundError({
+    name: "NotFoundError",
+    data: { message },
+  })
+}

packages/opencode/src/server/routes/instance/httpapi/groups/instance.ts

@@ -5,7 +5,7 @@ import { LSP } from "@/lsp/lsp"
 import { Vcs } from "@/project/vcs"
 import { Skill } from "@/skill"
 import { Schema } from "effect"
-import { HttpApi, HttpApiEndpoint, HttpApiGroup, OpenApi } from "effect/unstable/httpapi"
+import { HttpApi, HttpApiEndpoint, HttpApiGroup, HttpApiSchema, OpenApi } from "effect/unstable/httpapi"
 import { Authorization } from "../middleware/authorization"
 import { InstanceContextMiddleware } from "../middleware/instance-context"
 import { WorkspaceRoutingMiddleware } from "../middleware/workspace-routing"
@@ -23,11 +23,25 @@ export const VcsDiffQuery = Schema.Struct({
   mode: Vcs.Mode,
 })
 
+export class ApiVcsApplyError extends Schema.ErrorClass<ApiVcsApplyError>("VcsApplyError")(
+  {
+    name: Schema.Literal("VcsApplyError"),
+    data: Schema.Struct({
+      message: Schema.String,
+      reason: Schema.Literals(["non-git", "not-clean"]),
+    }),
+  },
+  { httpApiStatus: 400 },
+) {}
+
 export const InstancePaths = {
   dispose: "/instance/dispose",
   path: "/path",
   vcs: "/vcs",
+  vcsStatus: "/vcs/status",
   vcsDiff: "/vcs/diff",
+  vcsDiffRaw: "/vcs/diff/raw",
+  vcsApply: "/vcs/apply",
   command: "/command",
   agent: "/agent",
   skill: "/skill",
@@ -68,6 +82,15 @@ export const InstanceApi = HttpApi.make("instance")
               "Retrieve version control system (VCS) information for the current project, such as git branch.",
           }),
         ),
+        HttpApiEndpoint.get("vcsStatus", InstancePaths.vcsStatus, {
+          success: described(Schema.Array(Vcs.FileStatus), "VCS status"),
+        }).annotateMerge(
+          OpenApi.annotations({
+            identifier: "vcs.status",
+            summary: "Get VCS status",
+            description: "Retrieve changed files in the current working tree without patches.",
+          }),
+        ),
         HttpApiEndpoint.get("vcsDiff", InstancePaths.vcsDiff, {
           query: VcsDiffQuery,
           success: described(Schema.Array(Vcs.FileDiff), "VCS diff"),
@@ -78,6 +101,29 @@ export const InstanceApi = HttpApi.make("instance")
             description: "Retrieve the current git diff for the working tree or against the default branch.",
           }),
         ),
+        HttpApiEndpoint.get("vcsDiffRaw", InstancePaths.vcsDiffRaw, {
+          success: described(
+            Schema.String.pipe(HttpApiSchema.asText({ contentType: "text/x-diff; charset=utf-8" })),
+            "Raw VCS diff",
+          ),
+        }).annotateMerge(
+          OpenApi.annotations({
+            identifier: "vcs.diff.raw",
+            summary: "Get raw VCS diff",
+            description: "Retrieve a raw patch for current uncommitted changes.",
+          }),
+        ),
+        HttpApiEndpoint.post("vcsApply", InstancePaths.vcsApply, {
+          payload: Vcs.ApplyInput,
+          success: described(Vcs.ApplyResult, "VCS patch applied"),
+          error: ApiVcsApplyError,
+        }).annotateMerge(
+          OpenApi.annotations({
+            identifier: "vcs.apply",
+            summary: "Apply VCS patch",
+            description: "Apply a raw patch to the current working tree.",
+          }),
+        ),
         HttpApiEndpoint.get("command", InstancePaths.command, {
           success: described(Schema.Array(Command.Info), "List of commands"),
         }).annotateMerge(

packages/opencode/src/server/routes/instance/httpapi/groups/pty.ts

@@ -6,6 +6,7 @@ import { HttpApi, HttpApiEndpoint, HttpApiError, HttpApiGroup, OpenApi } from "e
 import { Authorization } from "../middleware/authorization"
 import { InstanceContextMiddleware } from "../middleware/instance-context"
 import { WorkspaceRoutingMiddleware } from "../middleware/workspace-routing"
+import { ApiNotFoundError } from "../errors"
 import { described } from "./metadata"
 
 const root = "/pty"
@@ -64,7 +65,7 @@ export const PtyApi = HttpApi.make("pty")
         HttpApiEndpoint.get("get", PtyPaths.get, {
           params: { ptyID: PtyID },
           success: described(Pty.Info, "Session info"),
-          error: HttpApiError.NotFound,
+          error: ApiNotFoundError,
         }).annotateMerge(
           OpenApi.annotations({
             identifier: "pty.get",
@@ -76,7 +77,7 @@ export const PtyApi = HttpApi.make("pty")
           params: { ptyID: PtyID },
           payload: Pty.UpdateInput,
           success: described(Pty.Info, "Updated session"),
-          error: [HttpApiError.BadRequest, HttpApiError.NotFound],
+          error: [HttpApiError.BadRequest, ApiNotFoundError],
         }).annotateMerge(
           OpenApi.annotations({
             identifier: "pty.update",
@@ -87,7 +88,7 @@ export const PtyApi = HttpApi.make("pty")
         HttpApiEndpoint.delete("remove", PtyPaths.remove, {
           params: { ptyID: PtyID },
           success: described(Schema.Boolean, "Session removed"),
-          error: HttpApiError.NotFound,
+          error: ApiNotFoundError,
         }).annotateMerge(
           OpenApi.annotations({
             identifier: "pty.remove",
@@ -98,7 +99,7 @@ export const PtyApi = HttpApi.make("pty")
         HttpApiEndpoint.post("connectToken", PtyPaths.connectToken, {
           params: { ptyID: PtyID },
           success: described(PtyTicket.ConnectToken, "WebSocket connect token"),
-          error: [HttpApiError.Forbidden, HttpApiError.NotFound],
+          error: [HttpApiError.Forbidden, ApiNotFoundError],
         }).annotateMerge(
           OpenApi.annotations({
             identifier: "pty.connectToken",

packages/opencode/src/server/routes/instance/httpapi/groups/session.ts

@@ -15,6 +15,7 @@ import { HttpApi, HttpApiEndpoint, HttpApiError, HttpApiGroup, HttpApiSchema, Op
 import { Authorization } from "../middleware/authorization"
 import { InstanceContextMiddleware } from "../middleware/instance-context"
 import { WorkspaceRoutingMiddleware } from "../middleware/workspace-routing"
+import { ApiNotFoundError } from "../errors"
 import { described } from "./metadata"
 
 const root = "/session"
@@ -130,7 +131,7 @@ export const SessionApi = HttpApi.make("session")
         HttpApiEndpoint.get("get", SessionPaths.get, {
           params: { sessionID: SessionID },
           success: described(Session.Info, "Get session"),
-          error: [HttpApiError.BadRequest, HttpApiError.NotFound],
+          error: [HttpApiError.BadRequest, ApiNotFoundError],
         }).annotateMerge(
           OpenApi.annotations({
             identifier: "session.get",
@@ -175,7 +176,7 @@ export const SessionApi = HttpApi.make("session")
           params: { sessionID: SessionID },
           query: MessagesQuery,
           success: described(Schema.Array(MessageV2.WithParts), "List of messages"),
-          error: [HttpApiError.BadRequest, HttpApiError.NotFound],
+          error: [HttpApiError.BadRequest, ApiNotFoundError],
         }).annotateMerge(
           OpenApi.annotations({
             identifier: "session.messages",
@@ -186,7 +187,7 @@ export const SessionApi = HttpApi.make("session")
         HttpApiEndpoint.get("message", SessionPaths.message, {
           params: { sessionID: SessionID, messageID: MessageID },
           success: described(MessageV2.WithParts, "Message"),
-          error: [HttpApiError.BadRequest, HttpApiError.NotFound],
+          error: [HttpApiError.BadRequest, ApiNotFoundError],
         }).annotateMerge(
           OpenApi.annotations({
             identifier: "session.message",
@@ -208,7 +209,7 @@ export const SessionApi = HttpApi.make("session")
         HttpApiEndpoint.delete("remove", SessionPaths.remove, {
           params: { sessionID: SessionID },
           success: described(Schema.Boolean, "Successfully deleted session"),
-          error: [HttpApiError.BadRequest, HttpApiError.NotFound],
+          error: [HttpApiError.BadRequest, ApiNotFoundError],
         }).annotateMerge(
           OpenApi.annotations({
             identifier: "session.delete",
@@ -220,7 +221,7 @@ export const SessionApi = HttpApi.make("session")
           params: { sessionID: SessionID },
           payload: UpdatePayload,
           success: described(Session.Info, "Successfully updated session"),
-          error: [HttpApiError.BadRequest, HttpApiError.NotFound],
+          error: [HttpApiError.BadRequest, ApiNotFoundError],
         }).annotateMerge(
           OpenApi.annotations({
             identifier: "session.update",
@@ -232,6 +233,7 @@ export const SessionApi = HttpApi.make("session")
           params: { sessionID: SessionID },
           payload: ForkPayload,
           success: described(Session.Info, "200"),
+          error: ApiNotFoundError,
         }).annotateMerge(
           OpenApi.annotations({
             identifier: "session.fork",
@@ -266,7 +268,7 @@ export const SessionApi = HttpApi.make("session")
         HttpApiEndpoint.post("share", SessionPaths.share, {
           params: { sessionID: SessionID },
           success: described(Session.Info, "Successfully shared session"),
-          error: [HttpApiError.BadRequest, HttpApiError.NotFound],
+          error: [HttpApiError.BadRequest, ApiNotFoundError],
         }).annotateMerge(
           OpenApi.annotations({
             identifier: "session.share",
@@ -277,7 +279,7 @@ export const SessionApi = HttpApi.make("session")
         HttpApiEndpoint.delete("unshare", SessionPaths.share, {
           params: { sessionID: SessionID },
           success: described(Session.Info, "Successfully unshared session"),
-          error: [HttpApiError.BadRequest, HttpApiError.NotFound],
+          error: [HttpApiError.BadRequest, ApiNotFoundError],
         }).annotateMerge(
           OpenApi.annotations({
             identifier: "session.unshare",
@@ -289,7 +291,7 @@ export const SessionApi = HttpApi.make("session")
           params: { sessionID: SessionID },
           payload: SummarizePayload,
           success: described(Schema.Boolean, "Summarized session"),
-          error: [HttpApiError.BadRequest, HttpApiError.NotFound],
+          error: [HttpApiError.BadRequest, ApiNotFoundError],
         }).annotateMerge(
           OpenApi.annotations({
             identifier: "session.summarize",

packages/opencode/src/server/routes/instance/httpapi/groups/sync.ts

@@ -1,4 +1,5 @@
 import { NonNegativeInt } from "@/util/schema"
+import { SessionID } from "@/session/schema"
 import { Schema } from "effect"
 import { HttpApi, HttpApiEndpoint, HttpApiError, HttpApiGroup, OpenApi } from "effect/unstable/httpapi"
 import { Authorization } from "../middleware/authorization"
@@ -21,6 +22,9 @@ export const ReplayPayload = Schema.Struct({
 export const ReplayResponse = Schema.Struct({
   sessionID: Schema.String,
 })
+export const SessionPayload = Schema.Struct({
+  sessionID: SessionID,
+})
 export const HistoryPayload = Schema.Record(Schema.String, NonNegativeInt)
 export const HistoryEvent = Schema.Struct({
   id: Schema.String,
@@ -33,6 +37,7 @@ export const HistoryEvent = Schema.Struct({
 export const SyncPaths = {
   start: `${root}/start`,
   replay: `${root}/replay`,
+  steal: `${root}/steal`,
   history: `${root}/history`,
 } as const
 
@@ -60,6 +65,17 @@ export const SyncApi = HttpApi.make("sync")
             description: "Validate and replay a complete sync event history.",
           }),
         ),
+        HttpApiEndpoint.post("steal", SyncPaths.steal, {
+          payload: SessionPayload,
+          success: described(SessionPayload, "Session stolen into workspace"),
+          error: HttpApiError.BadRequest,
+        }).annotateMerge(
+          OpenApi.annotations({
+            identifier: "sync.steal",
+            summary: "Steal session into workspace",
+            description: "Update a session to belong to the current workspace through the sync event system.",
+          }),
+        ),
         HttpApiEndpoint.post("history", SyncPaths.history, {
           payload: HistoryPayload,
           success: described(Schema.Array(HistoryEvent), "Sync events"),

packages/opencode/src/server/routes/instance/httpapi/groups/tui.ts

@@ -4,6 +4,7 @@ import { HttpApi, HttpApiEndpoint, HttpApiError, HttpApiGroup, OpenApi } from "e
 import { Authorization } from "../middleware/authorization"
 import { InstanceContextMiddleware } from "../middleware/instance-context"
 import { WorkspaceRoutingMiddleware } from "../middleware/workspace-routing"
+import { ApiNotFoundError } from "../errors"
 import { described } from "./metadata"
 
 const root = "/tui"
@@ -155,7 +156,7 @@ export const TuiApi = HttpApi.make("tui")
         HttpApiEndpoint.post("selectSession", TuiPaths.selectSession, {
           payload: TuiEvent.SessionSelect.properties,
           success: described(Schema.Boolean, "Session selected successfully"),
-          error: [HttpApiError.BadRequest, HttpApiError.NotFound],
+          error: [HttpApiError.BadRequest, ApiNotFoundError],
         }).annotateMerge(
           OpenApi.annotations({
             identifier: "tui.selectSession",

packages/opencode/src/server/routes/instance/httpapi/groups/workspace.ts

@@ -1,29 +1,37 @@
 import { Workspace } from "@/control-plane/workspace"
 import { WorkspaceAdapterEntry } from "@/control-plane/types"
-import { NonNegativeInt } from "@/util/schema"
 import { Schema, Struct } from "effect"
-import { HttpApi, HttpApiEndpoint, HttpApiError, HttpApiGroup, OpenApi } from "effect/unstable/httpapi"
+import { HttpApi, HttpApiEndpoint, HttpApiError, HttpApiGroup, HttpApiSchema, OpenApi } from "effect/unstable/httpapi"
+import { ApiVcsApplyError } from "./instance"
 import { Authorization } from "../middleware/authorization"
 import { InstanceContextMiddleware } from "../middleware/instance-context"
 import { WorkspaceRoutingMiddleware } from "../middleware/workspace-routing"
 import { described } from "./metadata"
 
 const root = "/experimental/workspace"
-export const CreatePayload = Schema.Struct({
-  ...Struct.omit(Workspace.CreateInput.fields, ["projectID", "extra"]),
-  extra: Schema.optional(Workspace.CreateInput.fields.extra),
-})
-export const SessionRestorePayload = Schema.Struct(Struct.omit(Workspace.SessionRestoreInput.fields, ["workspaceID"]))
-export const SessionRestoreResponse = Schema.Struct({
-  total: NonNegativeInt,
+export const CreatePayload = Schema.Struct(Struct.omit(Workspace.CreateInput.fields, ["projectID"]))
+export const WarpPayload = Schema.Struct({
+  id: Schema.NullOr(Workspace.Info.fields.id),
+  sessionID: Workspace.SessionWarpInput.fields.sessionID,
+  copyChanges: Workspace.SessionWarpInput.fields.copyChanges,
 })
 
+export class ApiWorkspaceWarpError extends Schema.ErrorClass<ApiWorkspaceWarpError>("WorkspaceWarpError")(
+  {
+    name: Schema.Literal("WorkspaceWarpError"),
+    data: Schema.Struct({
+      message: Schema.String,
+    }),
+  },
+  { httpApiStatus: 400 },
+) {}
+
 export const WorkspacePaths = {
   adapters: `${root}/adapter`,
   list: root,
   status: `${root}/status`,
   remove: `${root}/:id`,
-  sessionRestore: `${root}/:id/session-restore`,
+  warp: `${root}/warp`,
 } as const
 
 export const WorkspaceApi = HttpApi.make("workspace")
@@ -79,16 +87,15 @@ export const WorkspaceApi = HttpApi.make("workspace")
             description: "Remove an existing workspace.",
           }),
         ),
-        HttpApiEndpoint.post("sessionRestore", WorkspacePaths.sessionRestore, {
-          params: { id: Workspace.Info.fields.id },
-          payload: SessionRestorePayload,
-          success: described(SessionRestoreResponse, "Session replay started"),
-          error: HttpApiError.BadRequest,
+        HttpApiEndpoint.post("warp", WorkspacePaths.warp, {
+          payload: WarpPayload,
+          success: described(HttpApiSchema.NoContent, "Session warped"),
+          error: [ApiWorkspaceWarpError, ApiVcsApplyError],
         }).annotateMerge(
           OpenApi.annotations({
-            identifier: "experimental.workspace.sessionRestore",
-            summary: "Restore session into workspace",
-            description: "Replay a session's sync events into the target workspace in batches.",
+            identifier: "experimental.workspace.warp",
+            summary: "Warp session into workspace",
+            description: "Move a session's sync history into the target workspace, or detach it to the local project.",
           }),
         ),
       )

packages/opencode/src/server/routes/instance/httpapi/handlers/instance.ts

@@ -9,6 +9,7 @@ import { Skill } from "@/skill"
 import { Effect } from "effect"
 import { HttpApiBuilder } from "effect/unstable/httpapi"
 import { InstanceHttpApi } from "../api"
+import { ApiVcsApplyError } from "../groups/instance"
 import { markInstanceForDisposal } from "../lifecycle"
 
 export const instanceHandlers = HttpApiBuilder.group(InstanceHttpApi, "instance", (handlers) =>
@@ -41,10 +42,33 @@ export const instanceHandlers = HttpApiBuilder.group(InstanceHttpApi, "instance"
       return { branch, default_branch }
     })
 
+    const getVcsStatus = Effect.fn("InstanceHttpApi.vcsStatus")(function* () {
+      return yield* vcs.status()
+    })
+
     const getVcsDiff = Effect.fn("InstanceHttpApi.vcsDiff")(function* (ctx: { query: { mode: Vcs.Mode } }) {
       return yield* vcs.diff(ctx.query.mode)
     })
 
+    const getVcsDiffRaw = Effect.fn("InstanceHttpApi.vcsDiffRaw")(function* () {
+      return yield* vcs.diffRaw()
+    })
+
+    const applyVcs = Effect.fn("InstanceHttpApi.vcsApply")(function* (ctx: { payload: Vcs.ApplyInput }) {
+      return yield* vcs.apply(ctx.payload).pipe(
+        Effect.mapError(
+          (error) =>
+            new ApiVcsApplyError({
+              name: "VcsApplyError",
+              data: {
+                message: error.message,
+                reason: error.reason,
+              },
+            }),
+        ),
+      )
+    })
+
     const getCommand = Effect.fn("InstanceHttpApi.command")(function* () {
       return yield* command.list()
     })
@@ -69,7 +93,10 @@ export const instanceHandlers = HttpApiBuilder.group(InstanceHttpApi, "instance"
       .handle("dispose", dispose)
       .handle("path", getPath)
       .handle("vcs", getVcs)
+      .handle("vcsStatus", getVcsStatus)
       .handle("vcsDiff", getVcsDiff)
+      .handle("vcsDiffRaw", getVcsDiffRaw)
+      .handle("vcsApply", applyVcs)
       .handle("command", getCommand)
       .handle("agent", getAgent)
       .handle("skill", getSkill)

packages/opencode/src/server/routes/instance/httpapi/handlers/pty.ts

@@ -15,6 +15,7 @@ import { HttpRouter, HttpServerRequest, HttpServerResponse } from "effect/unstab
 import { HttpApiBuilder, HttpApiError } from "effect/unstable/httpapi"
 import * as Socket from "effect/unstable/socket/Socket"
 import { InstanceHttpApi } from "../api"
+import * as ApiError from "../errors"
 import { CursorQuery, Params, PtyPaths } from "../groups/pty"
 import { WebSocketTracker } from "../websocket-tracker"
 
@@ -46,7 +47,7 @@ export const ptyHandlers = HttpApiBuilder.group(InstanceHttpApi, "pty", (handler
 
     const get = Effect.fn("PtyHttpApi.get")(function* (ctx: { params: { ptyID: PtyID } }) {
       const info = yield* pty.get(ctx.params.ptyID)
-      if (!info) return yield* new HttpApiError.NotFound({})
+      if (!info) return yield* ApiError.notFound("Session not found")
       return info
     })
 
@@ -58,7 +59,7 @@ export const ptyHandlers = HttpApiBuilder.group(InstanceHttpApi, "pty", (handler
         ...ctx.payload,
         size: ctx.payload.size ? { ...ctx.payload.size } : undefined,
       })
-      if (!info) return yield* new HttpApiError.NotFound({})
+      if (!info) return yield* ApiError.notFound("Session not found")
       return info
     })
 
@@ -71,7 +72,7 @@ export const ptyHandlers = HttpApiBuilder.group(InstanceHttpApi, "pty", (handler
       const request = yield* HttpServerRequest.HttpServerRequest
       if (request.headers[PTY_CONNECT_TOKEN_HEADER] !== PTY_CONNECT_TOKEN_HEADER_VALUE || !validOrigin(request, cors))
         return yield* new HttpApiError.Forbidden({})
-      if (!(yield* pty.get(ctx.params.ptyID))) return yield* new HttpApiError.NotFound({})
+      if (!(yield* pty.get(ctx.params.ptyID))) return yield* ApiError.notFound("Session not found")
       return yield* tickets.issue({ ptyID: ctx.params.ptyID, ...(yield* PtyTicket.scope) })
     })
 

packages/opencode/src/server/routes/instance/httpapi/handlers/session-errors.ts

@@ -0,0 +1,9 @@
+import type { NotFoundError as StorageNotFoundError } from "@/storage/storage"
+import { Effect } from "effect"
+import * as ApiError from "../errors"
+
+type StorageNotFound = InstanceType<typeof StorageNotFoundError>
+
+export function mapStorageNotFound<A, R>(self: Effect.Effect<A, StorageNotFound, R>) {
+  return self.pipe(Effect.mapError((error) => ApiError.notFound(error.data.message)))
+}

packages/opencode/src/server/routes/instance/httpapi/handlers/session.ts

@@ -38,14 +38,7 @@ import {
   UpdatePayload,
   ViewedPayload,
 } from "../groups/session"
-
-const mapNotFound = <A, E, R>(self: Effect.Effect<A, E, R>) =>
-  self.pipe(
-    Effect.catchIf(NotFoundError.isInstance, () => Effect.fail(new HttpApiError.NotFound({}))),
-    Effect.catchDefect((error) =>
-      NotFoundError.isInstance(error) ? Effect.fail(new HttpApiError.NotFound({})) : Effect.die(error),
-    ),
-  )
+import * as SessionError from "./session-errors"
 
 export const sessionHandlers = HttpApiBuilder.group(InstanceHttpApi, "session", (handlers) =>
   Effect.gen(function* () {
@@ -80,7 +73,7 @@ export const sessionHandlers = HttpApiBuilder.group(InstanceHttpApi, "session",
     })
 
     const get = Effect.fn("SessionHttpApi.get")(function* (ctx: { params: { sessionID: SessionID } }) {
-      return yield* mapNotFound(session.get(ctx.params.sessionID))
+      return yield* SessionError.mapStorageNotFound(session.get(ctx.params.sessionID))
     })
 
     const children = Effect.fn("SessionHttpApi.children")(function* (ctx: { params: { sessionID: SessionID } }) {
@@ -102,51 +95,49 @@ export const sessionHandlers = HttpApiBuilder.group(InstanceHttpApi, "session",
       params: { sessionID: SessionID }
       query: typeof MessagesQuery.Type
     }) {
-      return yield* mapNotFound(
-        Effect.gen(function* () {
-          if (ctx.query.before && ctx.query.limit === undefined) return yield* new HttpApiError.BadRequest({})
-          if (ctx.query.before) {
-            const before = ctx.query.before
-            yield* Effect.try({
-              try: () => MessageV2.cursor.decode(before),
-              catch: () => new HttpApiError.BadRequest({}),
-            })
-          }
-          if (ctx.query.limit === undefined || ctx.query.limit === 0) {
-            yield* session.get(ctx.params.sessionID)
-            return yield* session.messages({ sessionID: ctx.params.sessionID })
-          }
+      if (ctx.query.before && ctx.query.limit === undefined) return yield* new HttpApiError.BadRequest({})
+      if (ctx.query.before) {
+        const before = ctx.query.before
+        yield* Effect.try({
+          try: () => MessageV2.cursor.decode(before),
+          catch: () => new HttpApiError.BadRequest({}),
+        })
+      }
+      yield* SessionError.mapStorageNotFound(session.get(ctx.params.sessionID))
+      if (ctx.query.limit === undefined || ctx.query.limit === 0) {
+        return yield* session.messages({ sessionID: ctx.params.sessionID })
+      }
 
-          yield* session.get(ctx.params.sessionID)
-          const page = MessageV2.page({
-            sessionID: ctx.params.sessionID,
-            limit: ctx.query.limit,
-            before: ctx.query.before,
-          })
-          if (!page.cursor) return page.items
+      const page = MessageV2.page({
+        sessionID: ctx.params.sessionID,
+        limit: ctx.query.limit,
+        before: ctx.query.before,
+      })
+      if (!page.cursor) return page.items
 
-          const request = yield* HttpServerRequest.HttpServerRequest
-          // toURL() honors the Host + x-forwarded-proto headers, so the Link
-          // header echoes the real origin instead of a hard-coded localhost.
-          const url = Option.getOrElse(HttpServerRequest.toURL(request), () => new URL(request.url, "http://localhost"))
-          url.searchParams.set("limit", ctx.query.limit.toString())
-          url.searchParams.set("before", page.cursor)
-          return HttpServerResponse.jsonUnsafe(page.items, {
-            headers: {
-              "Access-Control-Expose-Headers": "Link, X-Next-Cursor",
-              Link: `<${url.toString()}>; rel="next"`,
-              "X-Next-Cursor": page.cursor,
-            },
-          })
-        }),
-      )
+      const request = yield* HttpServerRequest.HttpServerRequest
+      // toURL() honors the Host + x-forwarded-proto headers, so the Link
+      // header echoes the real origin instead of a hard-coded localhost.
+      const url = Option.getOrElse(HttpServerRequest.toURL(request), () => new URL(request.url, "http://localhost"))
+      url.searchParams.set("limit", ctx.query.limit.toString())
+      url.searchParams.set("before", page.cursor)
+      return HttpServerResponse.jsonUnsafe(page.items, {
+        headers: {
+          "Access-Control-Expose-Headers": "Link, X-Next-Cursor",
+          Link: `<${url.toString()}>; rel="next"`,
+          "X-Next-Cursor": page.cursor,
+        },
+      })
     })
 
     const message = Effect.fn("SessionHttpApi.message")(function* (ctx: {
       params: { sessionID: SessionID; messageID: MessageID }
     }) {
-      return yield* mapNotFound(
-        Effect.sync(() => MessageV2.get({ sessionID: ctx.params.sessionID, messageID: ctx.params.messageID })),
+      return yield* SessionError.mapStorageNotFound(
+        Effect.try({
+          try: () => MessageV2.get({ sessionID: ctx.params.sessionID, messageID: ctx.params.messageID }),
+          catch: (error) => error,
+        }).pipe(Effect.catch((error) => (NotFoundError.isInstance(error) ? Effect.fail(error) : Effect.die(error)))),
       )
     })
 
@@ -171,7 +162,7 @@ export const sessionHandlers = HttpApiBuilder.group(InstanceHttpApi, "session",
     })
 
     const remove = Effect.fn("SessionHttpApi.remove")(function* (ctx: { params: { sessionID: SessionID } }) {
-      yield* session.remove(ctx.params.sessionID)
+      yield* SessionError.mapStorageNotFound(session.remove(ctx.params.sessionID))
       return true
     })
 
@@ -179,7 +170,7 @@ export const sessionHandlers = HttpApiBuilder.group(InstanceHttpApi, "session",
       params: { sessionID: SessionID }
       payload: typeof UpdatePayload.Type
     }) {
-      const current = yield* session.get(ctx.params.sessionID)
+      const current = yield* SessionError.mapStorageNotFound(session.get(ctx.params.sessionID))
       if (ctx.payload.title !== undefined) {
         yield* session.setTitle({ sessionID: ctx.params.sessionID, title: ctx.payload.title })
       }
@@ -192,14 +183,16 @@ export const sessionHandlers = HttpApiBuilder.group(InstanceHttpApi, "session",
       if (ctx.payload.time?.archived !== undefined) {
         yield* session.setArchived({ sessionID: ctx.params.sessionID, time: ctx.payload.time.archived })
       }
-      return yield* session.get(ctx.params.sessionID)
+      return yield* SessionError.mapStorageNotFound(session.get(ctx.params.sessionID))
     })
 
     const fork = Effect.fn("SessionHttpApi.fork")(function* (ctx: {
       params: { sessionID: SessionID }
       payload: typeof ForkPayload.Type
     }) {
-      return yield* session.fork({ sessionID: ctx.params.sessionID, messageID: ctx.payload.messageID })
+      return yield* SessionError.mapStorageNotFound(
+        session.fork({ sessionID: ctx.params.sessionID, messageID: ctx.payload.messageID }),
+      )
     })
 
     const abort = Effect.fn("SessionHttpApi.abort")(function* (ctx: { params: { sessionID: SessionID } }) {
@@ -223,19 +216,19 @@ export const sessionHandlers = HttpApiBuilder.group(InstanceHttpApi, "session",
 
     const share = Effect.fn("SessionHttpApi.share")(function* (ctx: { params: { sessionID: SessionID } }) {
       yield* shareSvc.share(ctx.params.sessionID).pipe(Effect.mapError(() => new HttpApiError.BadRequest({})))
-      return yield* session.get(ctx.params.sessionID)
+      return yield* SessionError.mapStorageNotFound(session.get(ctx.params.sessionID))
     })
 
     const unshare = Effect.fn("SessionHttpApi.unshare")(function* (ctx: { params: { sessionID: SessionID } }) {
       yield* shareSvc.unshare(ctx.params.sessionID).pipe(Effect.mapError(() => new HttpApiError.BadRequest({})))
-      return yield* session.get(ctx.params.sessionID)
+      return yield* SessionError.mapStorageNotFound(session.get(ctx.params.sessionID))
     })
 
     const summarize = Effect.fn("SessionHttpApi.summarize")(function* (ctx: {
       params: { sessionID: SessionID }
       payload: typeof SummarizePayload.Type
     }) {
-      yield* revertSvc.cleanup(yield* session.get(ctx.params.sessionID))
+      yield* revertSvc.cleanup(yield* SessionError.mapStorageNotFound(session.get(ctx.params.sessionID)))
       const messages = yield* session.messages({ sessionID: ctx.params.sessionID })
       const defaultAgent = yield* agentSvc.defaultAgent()
       const currentAgent = messages.findLast((message) => message.info.role === "user")?.info.agent ?? defaultAgent

packages/opencode/src/server/routes/instance/httpapi/handlers/sync.ts

@@ -1,5 +1,6 @@
 import { Workspace } from "@/control-plane/workspace"
 import * as InstanceState from "@/effect/instance-state"
+import { Session } from "@/session/session"
 import { Database } from "@/storage/db"
 import { SyncEvent } from "@/sync"
 import { EventTable } from "@/sync/event.sql"
@@ -12,7 +13,7 @@ import { or } from "drizzle-orm"
 import { Effect, Scope } from "effect"
 import { HttpApiBuilder } from "effect/unstable/httpapi"
 import { InstanceHttpApi } from "../api"
-import { HistoryPayload, ReplayPayload } from "../groups/sync"
+import { HistoryPayload, ReplayPayload, SessionPayload } from "../groups/sync"
 import * as Log from "@opencode-ai/core/util/log"
 
 const log = Log.create({ service: "server.sync" })
@@ -56,6 +57,25 @@ export const syncHandlers = HttpApiBuilder.group(InstanceHttpApi, "sync", (handl
       return { sessionID: source }
     })
 
+    const steal = Effect.fn("SyncHttpApi.steal")(function* (ctx: { payload: typeof SessionPayload.Type }) {
+      const workspaceID = yield* InstanceState.workspaceID
+      if (!workspaceID) throw new Error("Cannot steal session without workspace context")
+
+      yield* sync.run(Session.Event.Updated, {
+        sessionID: ctx.payload.sessionID,
+        info: {
+          workspaceID,
+        },
+      })
+
+      log.info("sync session stolen", {
+        sessionID: ctx.payload.sessionID,
+        workspaceID,
+      })
+
+      return { sessionID: ctx.payload.sessionID }
+    })
+
     const history = Effect.fn("SyncHttpApi.history")(function* (ctx: { payload: typeof HistoryPayload.Type }) {
       const exclude = Object.entries(ctx.payload)
       return Database.use((db) =>
@@ -72,6 +92,6 @@ export const syncHandlers = HttpApiBuilder.group(InstanceHttpApi, "sync", (handl
       )
     })
 
-    return handlers.handle("start", start).handle("replay", replay).handle("history", history)
+    return handlers.handle("start", start).handle("replay", replay).handle("steal", steal).handle("history", history)
   }),
 )

packages/opencode/src/server/routes/instance/httpapi/handlers/tui.ts

@@ -1,13 +1,12 @@
 import { Bus } from "@/bus"
 import { TuiEvent } from "@/cli/cmd/tui/event"
-import { SessionTable } from "@/session/session.sql"
-import * as Database from "@/storage/db"
-import { eq } from "drizzle-orm"
+import { Session } from "@/session/session"
 import { Effect } from "effect"
 import { HttpApiBuilder, HttpApiError } from "effect/unstable/httpapi"
 import { nextTuiRequest, submitTuiResponse } from "@/server/shared/tui-control"
 import { InstanceHttpApi } from "../api"
 import { CommandPayload, TuiPublishPayload } from "../groups/tui"
+import * as SessionError from "./session-errors"
 
 const commandAliases = {
   session_new: "session.new",
@@ -28,6 +27,7 @@ const commandAliases = {
 export const tuiHandlers = HttpApiBuilder.group(InstanceHttpApi, "tui", (handlers) =>
   Effect.gen(function* () {
     const bus = yield* Bus.Service
+    const session = yield* Session.Service
     const publishCommand = (command: typeof TuiEvent.CommandExecute.properties.Type.command | undefined) =>
       bus.publish(TuiEvent.CommandExecute, { command } as typeof TuiEvent.CommandExecute.properties.Type)
 
@@ -98,12 +98,7 @@ export const tuiHandlers = HttpApiBuilder.group(InstanceHttpApi, "tui", (handler
       payload: typeof TuiEvent.SessionSelect.properties.Type
     }) {
       if (!ctx.payload.sessionID.startsWith("ses")) return yield* new HttpApiError.BadRequest({})
-      const row = yield* Effect.sync(() =>
-        Database.use((db) =>
-          db.select({ id: SessionTable.id }).from(SessionTable).where(eq(SessionTable.id, ctx.payload.sessionID)).get(),
-        ),
-      )
-      if (!row) return yield* new HttpApiError.NotFound({})
+      yield* SessionError.mapStorageNotFound(session.get(ctx.payload.sessionID))
       yield* bus.publish(TuiEvent.SessionSelect, ctx.payload)
       return true
     })

packages/opencode/src/server/routes/instance/httpapi/handlers/workspace.ts

@@ -1,10 +1,12 @@
 import { listAdapters } from "@/control-plane/adapters"
 import { Workspace } from "@/control-plane/workspace"
 import * as InstanceState from "@/effect/instance-state"
+import { Vcs } from "@/project/vcs"
 import { Effect } from "effect"
 import { HttpApiBuilder, HttpApiError } from "effect/unstable/httpapi"
 import { InstanceHttpApi } from "../api"
-import { CreatePayload, SessionRestorePayload } from "../groups/workspace"
+import { ApiVcsApplyError } from "../groups/instance"
+import { ApiWorkspaceWarpError, CreatePayload, WarpPayload } from "../groups/workspace"
 
 export const workspaceHandlers = HttpApiBuilder.group(InstanceHttpApi, "workspace", (handlers) =>
   Effect.gen(function* () {
@@ -39,16 +41,32 @@ export const workspaceHandlers = HttpApiBuilder.group(InstanceHttpApi, "workspac
       return yield* workspace.remove(ctx.params.id)
     })
 
-    const sessionRestore = Effect.fn("WorkspaceHttpApi.sessionRestore")(function* (ctx: {
-      params: { id: Workspace.Info["id"] }
-      payload: typeof SessionRestorePayload.Type
-    }) {
-      return yield* workspace
-        .sessionRestore({
-          workspaceID: ctx.params.id,
+    const warp = Effect.fn("WorkspaceHttpApi.warp")(function* (ctx: { payload: typeof WarpPayload.Type }) {
+      yield* workspace
+        .sessionWarp({
+          workspaceID: ctx.payload.id,
           sessionID: ctx.payload.sessionID,
+          copyChanges: ctx.payload.copyChanges,
         })
-        .pipe(Effect.mapError(() => new HttpApiError.BadRequest({})))
+        .pipe(
+          Effect.mapError((error) => {
+            if (error instanceof Vcs.PatchApplyError) {
+              return new ApiVcsApplyError({
+                name: "VcsApplyError",
+                data: {
+                  message: error.message,
+                  reason: error.reason,
+                },
+              })
+            }
+            return new ApiWorkspaceWarpError({
+              name: "WorkspaceWarpError",
+              data: {
+                message: error.message,
+              },
+            })
+          }),
+        )
     })
 
     return handlers
@@ -57,6 +75,6 @@ export const workspaceHandlers = HttpApiBuilder.group(InstanceHttpApi, "workspac
       .handle("create", create)
       .handle("status", status)
       .handle("remove", remove)
-      .handle("sessionRestore", sessionRestore)
+      .handle("warp", warp)
   }),
 )

packages/opencode/src/server/routes/instance/httpapi/middleware/workspace-routing.ts

@@ -7,6 +7,7 @@ import { Session } from "@/session/session"
 import { HttpApiProxy } from "./proxy"
 import * as Fence from "@/server/shared/fence"
 import { getWorkspaceRouteSessionID, isLocalWorkspaceRoute, workspaceProxyURL } from "@/server/shared/workspace-routing"
+import { NotFoundError } from "@/storage/storage"
 import { Flag } from "@opencode-ai/core/flag/flag"
 import { Context, Data, Effect, Layer } from "effect"
 import { HttpClient, HttpRouter, HttpServerRequest, HttpServerResponse } from "effect/unstable/http"
@@ -178,7 +179,10 @@ function routeHttpApiWorkspace<E>(
     const request = yield* HttpServerRequest.HttpServerRequest
     const sessionID = getWorkspaceRouteSessionID(requestURL(request))
     const session = sessionID
-      ? yield* Session.Service.use((svc) => svc.get(sessionID)).pipe(Effect.catchDefect(() => Effect.void))
+      ? yield* Session.Service.use((svc) => svc.get(sessionID)).pipe(
+          Effect.catchIf(NotFoundError.isInstance, () => Effect.succeed(undefined)),
+          Effect.catchDefect(() => Effect.succeed(undefined)),
+        )
       : undefined
     const plan = yield* planRequest(request, session?.workspaceID)
     return yield* routeWorkspace(client, effect, plan)

packages/opencode/src/server/routes/instance/httpapi/public.ts

@@ -149,6 +149,16 @@ function matchLegacyOpenApi(input: Record<string, unknown>) {
           if (properties?.branch) properties.branch = { anyOf: [properties.branch, { type: "null" }] }
           if (properties?.extra) properties.extra = { anyOf: [properties.extra, { type: "null" }] }
         }
+        if (path === "/experimental/workspace/warp" && method === "post") {
+          const ref = operation.requestBody.content?.["application/json"]?.schema?.$ref?.replace(
+            "#/components/schemas/",
+            "",
+          )
+          const properties = ref
+            ? spec.components?.schemas?.[ref]?.properties
+            : operation.requestBody.content?.["application/json"]?.schema?.properties
+          if (properties?.id) properties.id = { anyOf: [properties.id, { type: "null" }] }
+        }
       }
       for (const response of Object.values(operation.responses ?? {})) {
         for (const content of Object.values(response.content ?? {})) {

packages/opencode/src/server/routes/instance/index.ts

@@ -27,7 +27,7 @@ import { ProviderRoutes } from "./provider"
 import { EventRoutes } from "./event"
 import { SyncRoutes } from "./sync"
 import { InstanceMiddleware } from "./middleware"
-import { jsonRequest } from "./trace"
+import { jsonRequest, runRequest } from "./trace"
 import { register as registerKiloRoutes } from "@/kilocode/server/instance" // kilocode_change
 import { ExperimentalHttpApiServer } from "./httpapi/server"
 import { EventPaths } from "./httpapi/event"
@@ -42,6 +42,7 @@ import { TuiPaths } from "./httpapi/groups/tui"
 import { WorkspacePaths } from "./httpapi/groups/workspace"
 import { register as registerKiloHttpApiRoutes } from "@/kilocode/server/httpapi/instance" // kilocode_change
 import type { CorsOptions } from "@/server/cors"
+import { errors } from "@/server/error"
 
 export const InstanceRoutes = (upgrade: UpgradeWebSocket, opts?: CorsOptions): Hono => {
   const app = new Hono()
@@ -92,7 +93,10 @@ export const InstanceRoutes = (upgrade: UpgradeWebSocket, opts?: CorsOptions): H
     app.get(InstancePaths.path, (c) => handler(c.req.raw, context))
     app.post(InstancePaths.dispose, (c) => handler(c.req.raw, context))
     app.get(InstancePaths.vcs, (c) => handler(c.req.raw, context))
+    app.get(InstancePaths.vcsStatus, (c) => handler(c.req.raw, context))
     app.get(InstancePaths.vcsDiff, (c) => handler(c.req.raw, context))
+    app.get(InstancePaths.vcsDiffRaw, (c) => handler(c.req.raw, context))
+    app.post(InstancePaths.vcsApply, (c) => handler(c.req.raw, context))
     app.get(InstancePaths.command, (c) => handler(c.req.raw, context))
     app.get(InstancePaths.agent, (c) => handler(c.req.raw, context))
     app.get(InstancePaths.skill, (c) => handler(c.req.raw, context))
@@ -162,7 +166,7 @@ export const InstanceRoutes = (upgrade: UpgradeWebSocket, opts?: CorsOptions): H
     app.get(WorkspacePaths.list, (c) => handler(c.req.raw, context))
     app.get(WorkspacePaths.status, (c) => handler(c.req.raw, context))
     app.delete(WorkspacePaths.remove, (c) => handler(c.req.raw, context))
-    app.post(WorkspacePaths.sessionRestore, (c) => handler(c.req.raw, context))
+    app.post(WorkspacePaths.warp, (c) => handler(c.req.raw, context))
     registerKiloHttpApiRoutes(app, handler, context) // kilocode_change
   }
 
@@ -297,6 +301,98 @@ export const InstanceRoutes = (upgrade: UpgradeWebSocket, opts?: CorsOptions): H
           return yield* vcs.diff(c.req.valid("query").mode)
         }),
     )
+    .get(
+      "/vcs/status",
+      describeRoute({
+        summary: "Get VCS status",
+        description: "Retrieve changed files in the current working tree without patches.",
+        operationId: "vcs.status",
+        responses: {
+          200: {
+            description: "VCS status",
+            content: {
+              "application/json": {
+                schema: resolver(Vcs.FileStatus.zod.array()),
+              },
+            },
+          },
+        },
+      }),
+      async (c) =>
+        jsonRequest("InstanceRoutes.vcs.status", c, function* () {
+          const vcs = yield* Vcs.Service
+          return yield* vcs.status()
+        }),
+    )
+    .get(
+      "/vcs/diff/raw",
+      describeRoute({
+        summary: "Get raw VCS diff",
+        description: "Retrieve a raw patch for current uncommitted changes.",
+        operationId: "vcs.diff.raw",
+        responses: {
+          200: {
+            description: "Raw VCS diff",
+            content: {
+              "text/x-diff": {
+                schema: resolver(z.string()),
+              },
+            },
+          },
+        },
+      }),
+      async (c) => {
+        const patch = await runRequest(
+          "InstanceRoutes.vcs.diffRaw",
+          c,
+          Vcs.Service.use((vcs) => vcs.diffRaw()),
+        )
+        return c.text(patch, 200, { "content-type": "text/x-diff; charset=utf-8" })
+      },
+    )
+    .post(
+      "/vcs/apply",
+      describeRoute({
+        summary: "Apply VCS patch",
+        description: "Apply a raw patch to the current working tree.",
+        operationId: "vcs.apply",
+        responses: {
+          200: {
+            description: "VCS patch applied",
+            content: {
+              "application/json": {
+                schema: resolver(Vcs.ApplyResult.zod),
+              },
+            },
+          },
+          ...errors(400),
+        },
+      }),
+      validator("json", Vcs.ApplyInput.zodObject),
+      async (c) => {
+        const result = await runRequest(
+          "InstanceRoutes.vcs.apply",
+          c,
+          Vcs.Service.use((vcs) => vcs.apply(c.req.valid("json") as Vcs.ApplyInput)).pipe(
+            Effect.match({
+              onFailure: (error) => ({ ok: false as const, error }),
+              onSuccess: (value) => ({ ok: true as const, value }),
+            }),
+          ),
+        )
+        if (result.ok) return c.json(result.value)
+        return c.json(
+          {
+            name: "VcsApplyError",
+            data: {
+              message: result.error.message,
+              reason: result.error.reason,
+            },
+          },
+          400,
+        )
+      },
+    )
     .get(
       "/command",
       describeRoute({

packages/opencode/src/server/routes/instance/sync.ts

@@ -16,6 +16,9 @@ import { Workspace } from "@/control-plane/workspace"
 import { AppRuntime } from "@/effect/app-runtime"
 import { Instance } from "@/project/instance"
 import { errors } from "../../error"
+import { Session } from "@/session/session"
+import { WorkspaceContext } from "@/control-plane/workspace-context"
+import { SessionID } from "@/session/schema"
 
 const ReplayEvent = z.object({
   id: z.string(),
@@ -24,6 +27,9 @@ const ReplayEvent = z.object({
   type: z.string(),
   data: z.record(z.string(), z.unknown()),
 })
+const SessionPayload = z.object({
+  sessionID: SessionID.zod,
+})
 
 const log = Log.create({ service: "server.sync" })
 
@@ -108,6 +114,47 @@ export const SyncRoutes = lazy(() =>
         })
       },
     )
+    .post(
+      "/steal",
+      describeRoute({
+        summary: "Steal session into workspace",
+        description: "Update a session to belong to the current workspace through the sync event system.",
+        operationId: "sync.steal",
+        responses: {
+          200: {
+            description: "Session stolen into workspace",
+            content: {
+              "application/json": {
+                schema: resolver(SessionPayload),
+              },
+            },
+          },
+          ...errors(400),
+        },
+      }),
+      validator("json", SessionPayload),
+      async (c) => {
+        const body = c.req.valid("json")
+        const workspaceID = WorkspaceContext.workspaceID
+        if (!workspaceID) throw new Error("Cannot steal session without workspace context")
+
+        SyncEvent.run(Session.Event.Updated, {
+          sessionID: body.sessionID,
+          info: {
+            workspaceID,
+          },
+        })
+
+        log.info("sync session stolen", {
+          sessionID: body.sessionID,
+          workspaceID,
+        })
+
+        return c.json({
+          sessionID: body.sessionID,
+        })
+      },
+    )
     .post(
       "/history",
       describeRoute({

packages/opencode/src/server/routes/ui.ts

@@ -1,7 +1,7 @@
 import fs from "node:fs/promises"
 import { AppFileSystem } from "@opencode-ai/core/filesystem"
 import { Hono } from "hono"
-import { DEFAULT_CSP, embeddedUI } from "../shared/ui"
+import { embeddedUI, cspForHtml } from "../shared/ui"
 
 export async function serveUI(request: Request) {
   const embeddedWebUI = await embeddedUI()
@@ -14,8 +14,11 @@ export async function serveUI(request: Request) {
     if (await fs.exists(match)) {
       const mime = AppFileSystem.mimeType(match)
       const headers = new Headers({ "content-type": mime })
-      if (mime.startsWith("text/html")) headers.set("content-security-policy", DEFAULT_CSP)
-      return new Response(new Uint8Array(await fs.readFile(match)), { headers })
+      const body = new Uint8Array(await fs.readFile(match))
+      if (mime.startsWith("text/html")) {
+        headers.set("content-security-policy", cspForHtml(new TextDecoder().decode(body)))
+      }
+      return new Response(body, { headers })
     }
 
     return Response.json({ error: "Not Found" }, { status: 404 })

packages/opencode/src/server/server.ts

@@ -108,10 +108,10 @@ function createHono(opts: CorsOptions, selection: ServerBackend.Selection = Serv
   const backendAttributes = ServerBackend.attributes(selection)
   const app = new Hono()
     .onError(ErrorMiddleware)
-    .use(AuthMiddleware)
-    .use(LoggerMiddleware(backendAttributes))
-    .use(CompressionMiddleware)
     .use(CorsMiddleware(opts))
+    .use(LoggerMiddleware(backendAttributes))
+    .use(AuthMiddleware)
+    .use(CompressionMiddleware)
     .route("/global", GlobalRoutes())
 
   const runtime = adapter.create(app)

packages/opencode/src/server/shared/ui.ts

@@ -2,14 +2,25 @@ import { Flag } from "@opencode-ai/core/flag/flag"
 import { AppFileSystem } from "@opencode-ai/core/filesystem"
 import { Effect } from "effect"
 import { HttpClient, HttpServerRequest, HttpServerResponse } from "effect/unstable/http"
+import { createHash } from "node:crypto"
 
 const embeddedUIPromise = Flag.KILO_DISABLE_EMBEDDED_WEB_UI
   ? Promise.resolve(null)
   : // @ts-expect-error - generated file at build time
     import("opencode-web-ui.gen.ts").then((module) => module.default as Record<string, string>).catch(() => null)
 
-export const DEFAULT_CSP =
-  "default-src 'self'; script-src 'self' 'wasm-unsafe-eval'; style-src 'self' 'unsafe-inline'; img-src 'self' data: https:; font-src 'self' data:; media-src 'self' data:; connect-src 'self' data:"
+export const csp = (hash = "") =>
+  `default-src 'self'; script-src 'self' 'wasm-unsafe-eval'${hash ? ` 'sha256-${hash}'` : ""}; style-src 'self' 'unsafe-inline'; img-src 'self' data: https:; font-src 'self' data:; media-src 'self' data:; connect-src * data:`
+export const DEFAULT_CSP = csp()
+
+export function themePreloadHash(body: string) {
+  return body.match(/<script\b(?![^>]*\bsrc\s*=)[^>]*\bid=(['"])oc-theme-preload-script\1[^>]*>([\s\S]*?)<\/script>/i)
+}
+
+export function cspForHtml(body: string) {
+  const match = themePreloadHash(body)
+  return csp(match ? createHash("sha256").update(match[2]).digest("base64") : "")
+}
 
 export function embeddedUI() {
   if (Flag.KILO_DISABLE_EMBEDDED_WEB_UI) return Promise.resolve(null)
@@ -23,7 +34,9 @@ function notFound() {
 function embeddedUIResponse(file: string, body: Uint8Array) {
   const mime = AppFileSystem.mimeType(file)
   const headers = new Headers({ "content-type": mime })
-  if (mime.startsWith("text/html")) headers.set("content-security-policy", DEFAULT_CSP)
+  if (mime.startsWith("text/html")) {
+    headers.set("content-security-policy", cspForHtml(new TextDecoder().decode(body)))
+  }
   return HttpServerResponse.raw(body, { headers })
 }
 

packages/opencode/src/session/message-v2.ts

@@ -958,15 +958,32 @@ export const toModelMessagesEffect = Effect.fnUntraced(function* (
         role: "assistant",
         parts: [],
       }
+      // Anthropic adaptive thinking can persist assistant turns like:
+      // step-start, reasoning(signature), text(""), step-start,
+      // reasoning(signature). The empty text part is a structural separator,
+      // but it does not carry the signature metadata itself. Dropping it shifts
+      // signed thinking positions after step-start splitting/provider regrouping;
+      // keeping it as "" is filtered by the AI SDK and rejected by Anthropic.
+      // It is unclear whether this shape originates in our stream processing,
+      // a proxy, or a lower-level library, but preserving a non-empty separator
+      // here is the only safe replay point we have.
+      // Use a single space so the separator survives replay without changing
+      // the neighboring signed reasoning blocks. Bedrock-hosted Claude stores
+      // the same signature under the bedrock metadata namespace.
+      const hasSignedReasoning = msg.parts.some((part) => {
+        if (part.type !== "reasoning") return false
+        return part.metadata?.anthropic?.signature != null || part.metadata?.bedrock?.signature != null
+      })
       for (const part of msg.parts) {
-        // kilocode_change start - keep local UI warnings out of future prompts
-        if (part.type === "text" && !part.ignored)
-          // kilocode_change end
+        // kilocode_change - !part.ignored keeps local UI warnings out of future prompts
+        if (part.type === "text" && !part.ignored) {
+          const text = part.text === "" && hasSignedReasoning ? " " : part.text
           assistantMessage.parts.push({
             type: "text",
-            text: part.text,
+            text,
             ...(differentModel ? {} : { providerMetadata: part.metadata }),
           })
+        }
         if (part.type === "step-start")
           assistantMessage.parts.push({
             type: "step-start",
@@ -1212,6 +1229,32 @@ export function filterCompacted(msgs: Iterable<WithParts>) {
       completed.add(msg.info.parentID)
   }
   result.reverse()
+  const compactionIndex = result.findLastIndex(
+    (msg) =>
+      msg.info.role === "user" &&
+      msg.parts.some((item): item is CompactionPart => item.type === "compaction" && item.tail_start_id !== undefined),
+  )
+  const compaction = result[compactionIndex]
+  const part = compaction?.parts.find(
+    (item): item is CompactionPart => item.type === "compaction" && item.tail_start_id !== undefined,
+  )
+  const summaryIndex = compaction
+    ? result.findIndex(
+        (msg, index) =>
+          index > compactionIndex &&
+          msg.info.role === "assistant" &&
+          msg.info.summary &&
+          msg.info.parentID === compaction.info.id,
+      )
+    : -1
+  const tailIndex = part?.tail_start_id ? result.findIndex((msg) => msg.info.id === part.tail_start_id) : -1
+  if (tailIndex >= 0 && tailIndex < compactionIndex && summaryIndex > compactionIndex) {
+    return [
+      ...result.slice(compactionIndex, summaryIndex + 1),
+      ...result.slice(tailIndex, compactionIndex),
+      ...result.slice(summaryIndex + 1),
+    ]
+  }
   return result
 }
 

packages/opencode/src/session/processor.ts

@@ -25,6 +25,7 @@ import * as Log from "@opencode-ai/core/util/log"
 import { isRecord } from "@/util/record"
 import { EventV2 } from "@/v2/event"
 import { SessionEvent } from "@/v2/session-event"
+import { Modelv2 } from "@/v2/model"
 import * as DateTime from "effect/DateTime"
 
 const DOOM_LOOP_THRESHOLD = 3
@@ -508,9 +509,9 @@ export const layer: Layer.Layer<
                 sessionID: ctx.sessionID,
                 agent: input.assistantMessage.agent,
                 model: {
-                  id: ctx.model.id,
-                  providerID: ctx.model.providerID,
-                  variant: input.assistantMessage.variant,
+                  id: Modelv2.ID.make(ctx.model.id),
+                  providerID: Modelv2.ProviderID.make(ctx.model.providerID),
+                  variant: Modelv2.VariantID.make(input.assistantMessage.variant ?? "default"),
                 },
                 snapshot: ctx.snapshot,
                 timestamp: DateTime.makeUnsafe(Date.now()),
@@ -786,7 +787,7 @@ export const layer: Layer.Layer<
           EventV2.run(SessionEvent.Step.Failed.Sync, {
             sessionID: ctx.sessionID,
             error: {
-              type: error.name,
+              type: "unknown",
               message: errorMessage(e),
             },
             timestamp: DateTime.makeUnsafe(Date.now()),

packages/opencode/src/session/projectors-next.ts

@@ -151,11 +151,7 @@ export default [
   SyncEvent.project(SessionEvent.ModelSwitched.Sync, (db, data, event) => {
     db.update(SessionTable)
       .set({
-        model: {
-          id: data.id,
-          providerID: data.providerID,
-          variant: data.variant,
-        },
+        model: data.model,
         time_updated: DateTime.toEpochMillis(data.timestamp),
       })
       .where(eq(SessionTable.id, data.sessionID))

packages/opencode/src/session/prompt.ts

@@ -8,7 +8,6 @@ import { KiloCostPropagation } from "@/kilocode/session/cost-propagation" // kil
 import { KiloSessionProcessor } from "@/kilocode/session/processor" // kilocode_change
 import { Suggestion } from "@/kilocode/suggestion" // kilocode_change
 import { Question } from "@/question" // kilocode_change
-import z from "zod"
 import * as EffectZod from "@/util/effect-zod"
 import { SessionID, MessageID, PartID } from "./schema"
 import { MessageV2 } from "./message-v2"
@@ -64,6 +63,7 @@ import { SessionRunState } from "./run-state"
 import { EffectBridge } from "@/effect/bridge"
 import { EventV2 } from "@/v2/event"
 import { SessionEvent } from "@/v2/session-event"
+import { Modelv2 } from "@/v2/model"
 import { AgentAttachment, FileAttachment, Source } from "@/v2/session-prompt"
 import * as DateTime from "effect/DateTime"
 import { eq } from "@/storage/db"
@@ -135,9 +135,8 @@ export const layer = Layer.effect(
       return yield* EffectBridge.make()
     })
     const ops = Effect.fn("SessionPrompt.ops")(function* () {
-      const run = yield* runner()
       return {
-        cancel: (sessionID: SessionID) => run.fork(cancel(sessionID)),
+        cancel: (sessionID: SessionID) => cancel(sessionID),
         resolvePromptParts: (template: string) => resolvePromptParts(template),
         prompt: (input: PromptInput) => prompt(input),
       } satisfies TaskPromptOps
@@ -789,7 +788,7 @@ NOTE: At any point in time through this workflow you should feel free to ask the
           const markReady = ready ? ready.open.pipe(Effect.asVoid) : Effect.void
           const { msg, part, cwd } = yield* Effect.gen(function* () {
             const ctx = yield* InstanceState.context
-            const session = yield* sessions.get(input.sessionID)
+            const session = yield* sessions.get(input.sessionID).pipe(Effect.orDie)
             if (session.revert) {
               yield* revert.cleanup(session)
             }
@@ -1023,9 +1022,11 @@ NOTE: At any point in time through this workflow you should feel free to ask the
         EventV2.run(SessionEvent.ModelSwitched.Sync, {
           sessionID: input.sessionID,
           timestamp: DateTime.makeUnsafe(info.time.created),
-          id: info.model.modelID,
-          providerID: info.model.providerID,
-          variant: info.model.variant,
+          model: {
+            id: Modelv2.ID.make(info.model.modelID),
+            providerID: Modelv2.ProviderID.make(info.model.providerID),
+            variant: Modelv2.VariantID.make(info.model.variant ?? "default"),
+          },
         })
       }
 
@@ -1414,7 +1415,7 @@ NOTE: At any point in time through this workflow you should feel free to ask the
 
     const prompt: (input: PromptInput) => Effect.Effect<MessageV2.WithParts> = Effect.fn("SessionPrompt.prompt")(
       function* (input: PromptInput) {
-        const session = yield* sessions.get(input.sessionID)
+        const session = yield* sessions.get(input.sessionID).pipe(Effect.orDie)
         yield* revert.cleanup(session)
         // kilocode_change start - persist queued prompts immediately while serializing each follow-up loop
         yield* KiloSessionPrompt.recoverDanglingAssistant({ sessionID: input.sessionID, status, sessions })
@@ -1476,9 +1477,9 @@ NOTE: At any point in time through this workflow you should feel free to ask the
         let compactionAttempts = 0 // kilocode_change - cap compaction attempts per turn to avoid infinite loops
         const ctx = yield* InstanceState.context
         const slog = elog.with({ sessionID })
-        let structured: unknown | undefined
+        let structured: unknown
         let step = 0
-        const session = yield* sessions.get(sessionID)
+        const session = yield* sessions.get(sessionID).pipe(Effect.orDie)
 
         while (true) {
           yield* status.set(sessionID, { type: "busy" })

packages/opencode/src/session/revert.ts

@@ -44,7 +44,7 @@ export const layer = Layer.effect(
       yield* state.assertNotBusy(input.sessionID)
       const all = yield* sessions.messages({ sessionID: input.sessionID })
       let lastUser: MessageV2.User | undefined
-      const session = yield* sessions.get(input.sessionID)
+      const session = yield* sessions.get(input.sessionID).pipe(Effect.orDie)
 
       let rev: Session.Info["revert"]
       const patches: Snapshot.Patch[] = []
@@ -77,12 +77,12 @@ export const layer = Layer.effect(
 
       // kilocode_change start - compute diffs BEFORE reverting files so the diff
       // reflects changes being undone (files on disk still have AI modifications)
-      const range = all.filter((msg) => msg.info.id >= rev!.messageID)
+      const range = all.filter((msg) => msg.info.id >= rev.messageID)
       const diffs = yield* summary.computeDiff({ messages: range })
       // kilocode_change end
 
       yield* snap.revert(patches)
-      if (rev.snapshot) rev.diff = yield* snap.diff(rev.snapshot as string)
+      if (rev.snapshot) rev.diff = yield* snap.diff(rev.snapshot)
       yield* storage.write(["session_diff", input.sessionID], diffs).pipe(Effect.ignore)
       yield* bus.publish(Session.Event.Diff, { sessionID: input.sessionID, diff: diffs })
       // kilocode_change start
@@ -103,17 +103,17 @@ export const layer = Layer.effect(
           diffs: summaryDiffs, // kilocode_change
         },
       })
-      return yield* sessions.get(input.sessionID)
+      return yield* sessions.get(input.sessionID).pipe(Effect.orDie)
     })
 
     const unrevert = Effect.fn("SessionRevert.unrevert")(function* (input: { sessionID: SessionID }) {
       log.info("unreverting", input)
       yield* state.assertNotBusy(input.sessionID)
-      const session = yield* sessions.get(input.sessionID)
+      const session = yield* sessions.get(input.sessionID).pipe(Effect.orDie)
       if (!session.revert) return session
-      if (session.revert.snapshot) yield* snap.restore(session.revert!.snapshot!)
+      if (session.revert.snapshot) yield* snap.restore(session.revert.snapshot)
       yield* sessions.clearRevert(input.sessionID)
-      return yield* sessions.get(input.sessionID)
+      return yield* sessions.get(input.sessionID).pipe(Effect.orDie)
     })
 
     const cleanup = Effect.fn("SessionRevert.cleanup")(function* (session: Session.Info) {

packages/opencode/src/session/session.ts

@@ -3,7 +3,6 @@ import path from "path"
 import { BusEvent } from "@/bus/bus-event"
 import { Bus } from "@/bus"
 import { Decimal } from "decimal.js"
-import z from "zod"
 import { type ProviderMetadata, type LanguageModelUsage } from "ai"
 import { Flag } from "@opencode-ai/core/flag/flag"
 import { InstallationVersion } from "@opencode-ai/core/installation/version"
@@ -441,6 +440,8 @@ export class BusyError extends Error {
   }
 }
 
+export type NotFound = InstanceType<typeof NotFoundError>
+
 export interface Interface {
   readonly list: (input?: ListInput) => Effect.Effect<Info[]>
   readonly create: (input?: {
@@ -452,9 +453,9 @@ export interface Interface {
     platform?: string // kilocode_change - per-session platform override for telemetry attribution
     workspaceID?: WorkspaceID
   }) => Effect.Effect<Info>
-  readonly fork: (input: { sessionID: SessionID; messageID?: MessageID }) => Effect.Effect<Info>
+  readonly fork: (input: { sessionID: SessionID; messageID?: MessageID }) => Effect.Effect<Info, NotFound>
   readonly touch: (sessionID: SessionID) => Effect.Effect<void>
-  readonly get: (id: SessionID) => Effect.Effect<Info>
+  readonly get: (id: SessionID) => Effect.Effect<Info, NotFound>
   readonly setTitle: (input: { sessionID: SessionID; title: string }) => Effect.Effect<void>
   readonly setArchived: (input: { sessionID: SessionID; time?: number }) => Effect.Effect<void>
   readonly setPermission: (input: { sessionID: SessionID; permission: Permission.Ruleset }) => Effect.Effect<void>
@@ -468,7 +469,7 @@ export interface Interface {
   readonly diff: (sessionID: SessionID) => Effect.Effect<Snapshot.FileDiff[]>
   readonly messages: (input: { sessionID: SessionID; limit?: number }) => Effect.Effect<MessageV2.WithParts[]>
   readonly children: (parentID: SessionID) => Effect.Effect<Info[]>
-  readonly remove: (sessionID: SessionID) => Effect.Effect<void>
+  readonly remove: (sessionID: SessionID) => Effect.Effect<void, NotFound>
   readonly updateMessage: <T extends MessageV2.Info>(msg: T) => Effect.Effect<T>
   readonly removeMessage: (input: { sessionID: SessionID; messageID: MessageID }) => Effect.Effect<MessageID>
   readonly removePart: (input: { sessionID: SessionID; messageID: MessageID; partID: PartID }) => Effect.Effect<PartID>
@@ -559,13 +560,13 @@ export const layer: Layer.Layer<Service, never, Bus.Service | Storage.Service |
 
     const get = Effect.fn("Session.get")(function* (id: SessionID) {
       const row = yield* db((d) => d.select().from(SessionTable).where(eq(SessionTable.id, id)).get())
-      if (!row) throw new NotFoundError({ message: `Session not found: ${id}` })
+      if (!row) return yield* Effect.fail(new NotFoundError({ message: `Session not found: ${id}` }))
       return fromRow(row)
     })
 
     const list = Effect.fn("Session.list")(function* (input?: ListInput) {
       const ctx = yield* InstanceState.context
-      return Array.from(listByProject({ projectID: ctx.project.id, ...(input ?? {}) }))
+      return Array.from(listByProject({ projectID: ctx.project.id, ...input }))
     })
 
     // kilocode_change start - scope by project_id when instance context is available
@@ -585,8 +586,8 @@ export const layer: Layer.Layer<Service, never, Bus.Service | Storage.Service |
     // kilocode_change end
 
     const remove: Interface["remove"] = Effect.fnUntraced(function* (sessionID: SessionID) {
+      const session = yield* get(sessionID)
       try {
-        const session = yield* get(sessionID)
         const kids = yield* children(sessionID)
         for (const child of kids) {
           yield* remove(child.id)

packages/opencode/src/sync/event.sql.ts

@@ -3,6 +3,7 @@ import { sqliteTable, text, integer } from "drizzle-orm/sqlite-core"
 export const EventSequenceTable = sqliteTable("event_sequence", {
   aggregate_id: text().notNull().primaryKey(),
   seq: integer().notNull(),
+  owner_id: text(),
 })
 
 export const EventTable = sqliteTable("event", {

packages/opencode/src/sync/index.ts

@@ -59,8 +59,11 @@ export interface Interface {
     data: Event<Def>["data"],
     options?: { publish?: boolean },
   ) => Effect.Effect<void>
-  readonly replay: (event: SerializedEvent, options?: { publish: boolean }) => Effect.Effect<void>
-  readonly replayAll: (events: SerializedEvent[], options?: { publish: boolean }) => Effect.Effect<string | undefined>
+  readonly replay: (event: SerializedEvent, options?: { publish: boolean; ownerID?: string }) => Effect.Effect<void>
+  readonly replayAll: (
+    events: SerializedEvent[],
+    options?: { publish: boolean; ownerID?: string },
+  ) => Effect.Effect<string | undefined>
   readonly remove: (aggregateID: string) => Effect.Effect<void>
 }
 
@@ -76,7 +79,7 @@ export const layer = Layer.effect(Service)(
 
       const row = Database.use((db) =>
         db
-          .select({ seq: EventSequenceTable.seq })
+          .select({ seq: EventSequenceTable.seq, ownerID: EventSequenceTable.owner_id })
           .from(EventSequenceTable)
           .where(eq(EventSequenceTable.aggregate_id, event.aggregateID))
           .get(),
@@ -85,6 +88,10 @@ export const layer = Layer.effect(Service)(
       const latest = row?.seq ?? -1
       if (event.seq <= latest) return
 
+      if (row?.ownerID && row.ownerID !== options?.ownerID) {
+        return
+      }
+
       const expected = latest + 1
       if (event.seq !== expected) {
         throw new Error(
@@ -99,7 +106,7 @@ export const layer = Layer.effect(Service)(
             workspace: yield* InstanceState.workspaceID,
           }
         : undefined
-      process(def, event, { publish, context })
+      process(def, event, { publish, context, ownerID: options?.ownerID })
     })
 
     const replayAll: Interface["replayAll"] = Effect.fn("SyncEvent.replayAll")(function* (events, options) {
@@ -263,7 +270,7 @@ export function project<Def extends Definition>(
 function process<Def extends Definition>(
   def: Def,
   event: Event<Def>,
-  options: { publish: boolean; context?: PublishContext },
+  options: { publish: boolean; context?: PublishContext; ownerID?: string },
 ) {
   if (projectors == null) {
     throw new Error("No projectors available. Call `SyncEvent.init` to install projectors")
@@ -274,8 +281,6 @@ function process<Def extends Definition>(
     throw new Error(`Projector not found for event: ${def.type}`)
   }
 
-  // idempotent: need to ignore any events already logged
-
   Database.transaction((tx) => {
     projector(tx, event.data, event)
 
@@ -284,6 +289,7 @@ function process<Def extends Definition>(
         .values({
           aggregate_id: event.aggregateID,
           seq: event.seq,
+          owner_id: options?.ownerID,
         })
         .onConflictDoUpdate({
           target: EventSequenceTable.aggregate_id,
@@ -332,11 +338,11 @@ function process<Def extends Definition>(
   })
 }
 
-export function replay(event: SerializedEvent, options?: { publish: boolean }) {
+export function replay(event: SerializedEvent, options?: { publish: boolean; ownerID?: string }) {
   return runtime.runSync((sync) => sync.replay(event, options))
 }
 
-export function replayAll(events: SerializedEvent[], options?: { publish: boolean }) {
+export function replayAll(events: SerializedEvent[], options?: { publish: boolean; ownerID?: string }) {
   return runtime.runSync((sync) => sync.replayAll(events, options))
 }
 
@@ -348,6 +354,16 @@ export function remove(aggregateID: string) {
   return runtime.runSync((sync) => sync.remove(aggregateID))
 }
 
+export function claim(aggregateID: string, ownerID: string) {
+  Database.use((db) =>
+    db
+      .update(EventSequenceTable)
+      .set({ owner_id: ownerID })
+      .where(eq(EventSequenceTable.aggregate_id, aggregateID))
+      .run(),
+  )
+}
+
 export function payloads() {
   return registry
     .entries()

packages/opencode/src/tool/task.ts

@@ -9,10 +9,11 @@ import { Config } from "@/config/config"
 import { KiloTask } from "../kilocode/tool/task" // kilocode_change
 import { KiloCostPropagation } from "../kilocode/session/cost-propagation" // kilocode_change
 import { KiloSessionProcessor } from "../kilocode/session/processor" // kilocode_change
-import { Effect, Schema } from "effect"
+import { Effect, Exit, Schema } from "effect"
+import { EffectBridge } from "@/effect/bridge"
 
 export interface TaskPromptOps {
-  cancel(sessionID: SessionID): void
+  cancel(sessionID: SessionID): Effect.Effect<void>
   resolvePromptParts(template: string): Effect.Effect<SessionPrompt.PromptInput["parts"]>
   prompt(input: SessionPrompt.PromptInput): Effect.Effect<MessageV2.WithParts>
 }
@@ -138,17 +139,19 @@ export const TaskTool = Tool.define(
 
       const ops = ctx.extra?.promptOps as TaskPromptOps
       if (!ops) return yield* Effect.fail(new Error("TaskTool requires promptOps in ctx.extra"))
+      const runCancel = yield* EffectBridge.make()
 
       const messageID = MessageID.ascending()
+      const cancel = ops.cancel(nextSession.id)
 
-      function cancel() {
-        ops.cancel(nextSession.id)
+      function onAbort() {
+        runCancel.fork(cancel)
       }
 
       return yield* Effect.acquireUseRelease(
         // kilocode_change start - snapshot child cost so we propagate only the delta on resume (#6321)
         Effect.gen(function* () {
-          ctx.abort.addEventListener("abort", cancel)
+          ctx.abort.addEventListener("abort", onAbort)
           return yield* KiloCostPropagation.childCost(sessions, nextSession.id)
         }),
         // kilocode_change end
@@ -190,12 +193,18 @@ export const TaskTool = Tool.define(
             }
           }),
         // kilocode_change start - propagate subagent cost delta to parent on every exit path (#6321)
-        (costBefore) =>
+        (costBefore, exit) =>
           Effect.gen(function* () {
-            ctx.abort.removeEventListener("abort", cancel)
-            const costAfter = yield* KiloCostPropagation.childCost(sessions, nextSession.id)
-            yield* KiloCostPropagation.propagate(sessions, ctx.sessionID, ctx.messageID, costAfter - costBefore)
-          }),
+            if (Exit.hasInterrupts(exit)) yield* cancel
+          }).pipe(
+            Effect.ensuring(
+              Effect.gen(function* () {
+                ctx.abort.removeEventListener("abort", onAbort)
+                const costAfter = yield* KiloCostPropagation.childCost(sessions, nextSession.id)
+                yield* KiloCostPropagation.propagate(sessions, ctx.sessionID, ctx.messageID, costAfter - costBefore)
+              }),
+            ),
+          ),
         // kilocode_change end
       )
     })

packages/opencode/src/util/locale.ts

@@ -63,6 +63,11 @@ export function truncate(str: string, len: number): string {
   return str.slice(0, len - 1) + "…"
 }
 
+export function truncateLeft(str: string, len: number): string {
+  if (str.length <= len) return str
+  return "…" + str.slice(-(len - 1))
+}
+
 export function truncateMiddle(str: string, maxLength: number = 35): string {
   if (str.length <= maxLength) return str
 

packages/opencode/src/v2/auth.ts

@@ -0,0 +1,246 @@
+import path from "path"
+import { Effect, Layer, Option, Schema, Context, SynchronizedRef } from "effect"
+import { Identifier } from "@opencode-ai/core/util/identifier"
+import { NonNegativeInt, withStatics } from "@/util/schema"
+import { Global } from "@opencode-ai/core/global"
+import { AppFileSystem } from "@opencode-ai/core/filesystem"
+
+export const OAUTH_DUMMY_KEY = "opencode-oauth-dummy-key"
+
+const AccountID = Schema.String.pipe(
+  Schema.brand("AccountID"),
+  withStatics((schema) => ({ create: () => schema.make("acc_" + Identifier.ascending()) })),
+)
+export type AccountID = typeof AccountID.Type
+
+export const ServiceID = Schema.String.pipe(Schema.brand("ServiceID"))
+export type ServiceID = typeof ServiceID.Type
+
+export class OAuthCredential extends Schema.Class<OAuthCredential>("AuthV2.OAuthCredential")({
+  type: Schema.Literal("oauth"),
+  refresh: Schema.String,
+  access: Schema.String,
+  expires: NonNegativeInt,
+}) {}
+
+export class ApiKeyCredential extends Schema.Class<ApiKeyCredential>("AuthV2.ApiKeyCredential")({
+  type: Schema.Literal("api"),
+  key: Schema.String,
+  metadata: Schema.optional(Schema.Record(Schema.String, Schema.String)),
+}) {}
+
+export const Credential = Schema.Union([OAuthCredential, ApiKeyCredential])
+  .pipe(Schema.toTaggedUnion("type"))
+  .annotate({
+    identifier: "AuthV2.Credential",
+  })
+export type Credential = Schema.Schema.Type<typeof Credential>
+
+export class Account extends Schema.Class<Account>("AuthV2.Account")({
+  id: AccountID,
+  serviceID: ServiceID,
+  description: Schema.String,
+  credential: Credential,
+}) {}
+
+export class AuthFileWriteError extends Schema.TaggedErrorClass<AuthFileWriteError>()("AuthV2.FileWriteError", {
+  operation: Schema.Union([Schema.Literal("migrate"), Schema.Literal("write")]),
+  cause: Schema.Defect,
+}) {}
+
+export type AuthError = AuthFileWriteError
+
+interface Writable {
+  version: 2
+  accounts: Record<string, Account>
+  active: Record<string, AccountID>
+}
+
+const decodeV1 = Schema.decodeUnknownOption(Schema.Record(Schema.String, Credential))
+
+function migrate(old: Record<string, unknown>): Writable {
+  const accounts: Record<string, Account> = {}
+  const active: Record<string, AccountID> = {}
+  for (const [serviceID, value] of Object.entries(old)) {
+    const decoded = Option.getOrElse(decodeV1({ [serviceID]: value }), () => ({}))
+    const parsed = (decoded as Record<string, Credential>)[serviceID]
+    if (!parsed) continue
+    const id = Identifier.ascending()
+    const accountID = AccountID.make(id)
+    const brandedServiceID = ServiceID.make(serviceID)
+    accounts[id] = new Account({
+      id: accountID,
+      serviceID: brandedServiceID,
+      description: "default",
+      credential: parsed,
+    })
+    active[brandedServiceID] = accountID
+  }
+  return { version: 2, accounts, active }
+}
+
+export interface Interface {
+  readonly get: (accountID: AccountID) => Effect.Effect<Account | undefined, AuthError>
+  readonly all: () => Effect.Effect<Account[], AuthError>
+  readonly create: (input: {
+    serviceID: ServiceID
+    credential: Credential
+    description?: string
+    active?: boolean
+  }) => Effect.Effect<Account, AuthError>
+  readonly update: (
+    accountID: AccountID,
+    updates: Partial<Pick<Account, "description" | "credential">>,
+  ) => Effect.Effect<void, AuthError>
+  readonly remove: (accountID: AccountID) => Effect.Effect<void, AuthError>
+  readonly activate: (accountID: AccountID) => Effect.Effect<void, AuthError>
+  readonly active: (serviceID: ServiceID) => Effect.Effect<Account | undefined, AuthError>
+  readonly forService: (serviceID: ServiceID) => Effect.Effect<Account[], AuthError>
+}
+
+export class Service extends Context.Service<Service, Interface>()("@opencode/v2/Auth") {}
+
+export const layer = Layer.effect(
+  Service,
+  Effect.gen(function* () {
+    const fsys = yield* AppFileSystem.Service
+    const global = yield* Global.Service
+    const file = path.join(global.data, "auth-v2.json")
+
+    const load: () => Effect.Effect<Writable, AuthError> = Effect.fnUntraced(function* () {
+      if (process.env.KILO_AUTH_CONTENT) {
+        try {
+          return JSON.parse(process.env.KILO_AUTH_CONTENT)
+        } catch {}
+      }
+
+      const raw = yield* fsys.readJson(file).pipe(Effect.orElseSucceed(() => null))
+
+      if (!raw || typeof raw !== "object") return { version: 2, accounts: {}, active: {} }
+
+      if ("version" in raw && raw.version === 2) return raw as Writable
+
+      const migrated = migrate(raw as Record<string, unknown>)
+      yield* fsys
+        .writeJson(file, migrated, 0o600)
+        .pipe(Effect.mapError((cause) => new AuthFileWriteError({ operation: "migrate", cause })))
+      return migrated
+    })
+
+    const write = (data: Writable) =>
+      fsys
+        .writeJson(file, data, 0o600)
+        .pipe(Effect.mapError((cause) => new AuthFileWriteError({ operation: "write", cause })))
+
+    const state = SynchronizedRef.makeUnsafe(yield* load())
+
+    const result: Interface = {
+      get: Effect.fn("AuthV2.get")(function* (accountID) {
+        return (yield* SynchronizedRef.get(state)).accounts[accountID]
+      }),
+
+      all: Effect.fn("AuthV2.all")(function* () {
+        return Object.values((yield* SynchronizedRef.get(state)).accounts)
+      }),
+
+      active: Effect.fn("AuthV2.active")(function* (serviceID) {
+        const data = yield* SynchronizedRef.get(state)
+        return (
+          data.accounts[data.active[serviceID]] ?? Object.values(data.accounts).find((a) => a.serviceID === serviceID)
+        )
+      }),
+
+      forService: Effect.fn("AuthV2.list")(function* (serviceID) {
+        return Object.values((yield* SynchronizedRef.get(state)).accounts).filter((a) => a.serviceID === serviceID)
+      }),
+
+      create: Effect.fn("AuthV2.add")(function* (input) {
+        return yield* SynchronizedRef.modifyEffect(
+          state,
+          Effect.fnUntraced(function* (data) {
+            const account = new Account({
+              id: AccountID.make(Identifier.ascending()),
+              serviceID: input.serviceID,
+              description: input.description ?? "default",
+              credential: input.credential,
+            })
+            const next = {
+              ...data,
+              accounts: { ...data.accounts, [account.id]: account },
+              active:
+                (input.active ?? Object.values(data.accounts).every((a) => a.serviceID !== input.serviceID))
+                  ? { ...data.active, [input.serviceID]: account.id }
+                  : data.active,
+            }
+
+            yield* write(next)
+            return [account, next] as const
+          }),
+        )
+      }),
+
+      update: Effect.fn("AuthV2.update")(function* (accountID, updates) {
+        yield* SynchronizedRef.modifyEffect(
+          state,
+          Effect.fnUntraced(function* (data) {
+            const existing = data.accounts[accountID]
+            if (!existing) return [undefined, data] as const
+
+            const next = {
+              ...data,
+              accounts: {
+                ...data.accounts,
+                [accountID]: new Account({
+                  id: accountID,
+                  serviceID: existing.serviceID,
+                  description: updates.description ?? existing.description,
+                  credential: updates.credential ?? existing.credential,
+                }),
+              },
+            }
+
+            yield* write(next)
+            return [undefined, next] as const
+          }),
+        )
+      }),
+
+      remove: Effect.fn("AuthV2.remove")(function* (accountID) {
+        yield* SynchronizedRef.modifyEffect(
+          state,
+          Effect.fnUntraced(function* (data) {
+            const accounts = { ...data.accounts }
+            const active = { ...data.active }
+            if (accounts[accountID] && active[accounts[accountID].serviceID] === accountID)
+              delete active[accounts[accountID].serviceID]
+            delete accounts[accountID]
+
+            const next = { ...data, accounts, active }
+            yield* write(next)
+            return [undefined, next] as const
+          }),
+        )
+      }),
+
+      activate: Effect.fn("AuthV2.activate")(function* (accountID) {
+        yield* SynchronizedRef.modifyEffect(
+          state,
+          Effect.fnUntraced(function* (data) {
+            const account = data.accounts[accountID]
+            if (!account) return [undefined, data] as const
+
+            const next = { ...data, active: { ...data.active, [account.serviceID]: accountID } }
+            yield* write(next)
+            return [undefined, next] as const
+          }),
+        )
+      }),
+    }
+
+    return Service.of(result)
+  }),
+)
+
+export const defaultLayer = layer.pipe(Layer.provide(AppFileSystem.defaultLayer), Layer.provide(Global.defaultLayer))
+
+export * as AuthV2 from "./auth"

packages/opencode/src/v2/model.ts

@@ -0,0 +1,192 @@
+import { withStatics } from "@/util/schema"
+import { Array, Context, Effect, HashMap, Layer, Option, Order, pipe, Schema } from "effect"
+import { DateTimeUtcFromMillis } from "effect/Schema"
+
+export const ID = Schema.String.pipe(Schema.brand("Model.ID"))
+export type ID = typeof ID.Type
+
+export const ProviderID = Schema.String.pipe(
+  Schema.brand("Model.ProviderID"),
+  withStatics((schema) => ({
+    // Well-known providers
+    opencode: schema.make("opencode"),
+    anthropic: schema.make("anthropic"),
+    openai: schema.make("openai"),
+    google: schema.make("google"),
+    googleVertex: schema.make("google-vertex"),
+    githubCopilot: schema.make("github-copilot"),
+    amazonBedrock: schema.make("amazon-bedrock"),
+    azure: schema.make("azure"),
+    openrouter: schema.make("openrouter"),
+    mistral: schema.make("mistral"),
+    gitlab: schema.make("gitlab"),
+  })),
+)
+export type ProviderID = typeof ProviderID.Type
+
+export const VariantID = Schema.String.pipe(Schema.brand("VariantID"))
+export type VariantID = typeof VariantID.Type
+
+// Grouping of models, eg claude opus, claude sonnet
+export const Family = Schema.String.pipe(Schema.brand("Family"))
+export type Family = typeof Family.Type
+
+const OpenAIResponses = Schema.Struct({
+  type: Schema.Literal("openai/responses"),
+  url: Schema.String,
+  websocket: Schema.optional(Schema.Boolean),
+})
+
+const OpenAICompletions = Schema.Struct({
+  type: Schema.Literal("openai/completions"),
+  url: Schema.String,
+  reasoning: Schema.Union([
+    Schema.Struct({
+      type: Schema.Literal("reasoning_content"),
+    }),
+    Schema.Struct({
+      type: Schema.Literal("reasoning_details"),
+    }),
+  ]).pipe(Schema.optional),
+})
+export type OpenAICompletions = typeof OpenAICompletions.Type
+
+const AnthropicMessages = Schema.Struct({
+  type: Schema.Literal("anthropic/messages"),
+  url: Schema.String,
+})
+
+export const Endpoint = Schema.Union([OpenAIResponses, OpenAICompletions, AnthropicMessages]).pipe(
+  Schema.toTaggedUnion("type"),
+)
+export type Endpoint = typeof Endpoint.Type
+
+export const Capabilities = Schema.Struct({
+  tools: Schema.Boolean,
+  // mime patterns, image, audio, video/*, text/*
+  input: Schema.String.pipe(Schema.Array),
+  output: Schema.String.pipe(Schema.Array),
+})
+export type Capabilities = typeof Capabilities.Type
+
+export const Options = Schema.Struct({
+  headers: Schema.Record(Schema.String, Schema.String),
+  body: Schema.Record(Schema.String, Schema.Any),
+})
+export type Options = typeof Options.Type
+
+export const Cost = Schema.Struct({
+  tier: Schema.Struct({
+    type: Schema.Literal("context"),
+    size: Schema.Int,
+  }).pipe(Schema.optional),
+  input: Schema.Finite,
+  output: Schema.Finite,
+  cache: Schema.Struct({
+    read: Schema.Finite,
+    write: Schema.Finite,
+  }),
+})
+
+export const Ref = Schema.Struct({
+  id: ID,
+  providerID: ProviderID,
+  variant: VariantID,
+})
+export type Ref = typeof Ref.Type
+
+export class Info extends Schema.Class<Info>("Model.Info")({
+  id: ID,
+  providerID: ProviderID,
+  family: Family.pipe(Schema.optional),
+  name: Schema.String,
+  endpoint: Endpoint,
+  capabilities: Capabilities,
+  options: Schema.Struct({
+    ...Options.fields,
+    variant: Schema.String.pipe(Schema.optional),
+  }),
+  variants: Schema.Struct({
+    id: VariantID,
+    ...Options.fields,
+  }).pipe(Schema.Array),
+  time: Schema.Struct({
+    released: DateTimeUtcFromMillis,
+  }),
+  cost: Cost.pipe(Schema.Array),
+  status: Schema.Literals(["alpha", "beta", "deprecated", "active"]),
+  limit: Schema.Struct({
+    context: Schema.Int,
+    input: Schema.Int.pipe(Schema.optional),
+    output: Schema.Int,
+  }),
+}) {}
+
+export function parse(input: string): { providerID: ProviderID; modelID: ID } {
+  const [providerID, ...modelID] = input.split("/")
+  return {
+    providerID: ProviderID.make(providerID),
+    modelID: ID.make(modelID.join("/")),
+  }
+}
+
+export interface Interface {
+  readonly get: (providerID: ProviderID, modelID: ID) => Effect.Effect<Option.Option<Info>>
+  readonly add: (model: Info) => Effect.Effect<void>
+  readonly remove: (providerID: ProviderID, modelID: ID) => Effect.Effect<void>
+  readonly all: () => Effect.Effect<Info[]>
+  readonly default: () => Effect.Effect<Option.Option<Info>>
+  readonly small: (provider: ProviderID) => Effect.Effect<Option.Option<Info>>
+}
+
+export class Service extends Context.Service<Service, Interface>()("@opencode/v2/Model") {}
+
+export const layer = Layer.effect(
+  Service,
+  Effect.gen(function* () {
+    let models = HashMap.empty<string, Info>()
+
+    function key(providerID: ProviderID, modelID: ID) {
+      return `${providerID}/${modelID}`
+    }
+
+    const result: Interface = {
+      get: Effect.fn("V2Model.get")(function* (providerID, modelID) {
+        return HashMap.get(models, key(providerID, modelID))
+      }),
+
+      add: Effect.fn("V2Model.add")(function* (model) {
+        models = HashMap.set(models, key(model.providerID, model.id), model)
+      }),
+
+      remove: Effect.fn("V2Model.remove")(function* (providerID, modelID) {
+        models = HashMap.remove(models, key(providerID, modelID))
+      }),
+
+      all: Effect.fn("V2Model.all")(function* () {
+        return pipe(
+          models,
+          HashMap.toValues,
+          Array.sortWith((item) => item.time.released.epochMilliseconds, Order.flip(Order.Number)),
+        )
+      }),
+
+      default: Effect.fn("V2Model.default")(function* () {
+        const all = yield* result.all()
+        return Option.fromUndefinedOr(all[0])
+      }),
+
+      small: Effect.fn("V2Model.small")(function* (providerID) {
+        const all = yield* result.all()
+        const match = all.find((model) => model.providerID === providerID && model.id.toLowerCase().includes("small"))
+        return Option.fromUndefinedOr(match)
+      }),
+    }
+
+    return Service.of(result)
+  }),
+)
+
+export const defaultLayer = layer
+
+export * as Modelv2 from "./model"

packages/opencode/src/v2/session-event.ts

@@ -5,8 +5,8 @@ import { FileAttachment, Prompt } from "./session-prompt"
 import { Schema } from "effect"
 export { FileAttachment }
 import { ToolOutput } from "./tool-output"
-import { ModelID, ProviderID } from "@/provider/schema"
 import { V2Schema } from "./schema"
+import { Modelv2 } from "./model"
 
 export const Source = Schema.Struct({
   start: NonNegativeInt,
@@ -22,10 +22,13 @@ const Base = {
   sessionID: SessionID,
 }
 
-const Error = Schema.Struct({
-  type: Schema.String,
+export const UnknownError = Schema.Struct({
+  type: Schema.Literal("unknown"),
   message: Schema.String,
+}).annotate({
+  identifier: "Session.Error.Unknown",
 })
+export type UnknownError = Schema.Schema.Type<typeof UnknownError>
 
 export const AgentSwitched = EventV2.define({
   type: "session.next.agent.switched",
@@ -44,9 +47,7 @@ export const ModelSwitched = EventV2.define({
   version: 1,
   schema: {
     ...Base,
-    id: ModelID,
-    providerID: ProviderID,
-    variant: Schema.String.pipe(Schema.optional),
+    model: Modelv2.Ref,
   },
 })
 export type ModelSwitched = Schema.Schema.Type<typeof ModelSwitched>
@@ -103,11 +104,7 @@ export namespace Step {
     schema: {
       ...Base,
       agent: Schema.String,
-      model: Schema.Struct({
-        id: Schema.String,
-        providerID: Schema.String,
-        variant: Schema.String.pipe(Schema.optional),
-      }),
+      model: Modelv2.Ref,
       snapshot: Schema.String.pipe(Schema.optional),
     },
   })
@@ -139,7 +136,7 @@ export namespace Step {
     aggregate: "sessionID",
     schema: {
       ...Base,
-      error: Error,
+      error: UnknownError,
     },
   })
   export type Failed = Schema.Schema.Type<typeof Failed>
@@ -296,7 +293,7 @@ export namespace Tool {
     schema: {
       ...Base,
       callID: Schema.String,
-      error: Error,
+      error: UnknownError,
       provider: Schema.Struct({
         executed: Schema.Boolean,
         metadata: Schema.Record(Schema.String, Schema.Unknown).pipe(Schema.optional),

packages/opencode/src/v2/session-message-updater.ts

@@ -109,11 +109,7 @@ export function update<Result>(adapter: Adapter<Result>, event: SessionEvent.Eve
           id: event.id,
           type: "model-switched",
           metadata: event.metadata,
-          model: {
-            id: event.data.id,
-            providerID: event.data.providerID,
-            variant: event.data.variant,
-          },
+          model: event.data.model,
           time: { created: event.data.timestamp },
         }),
       )

packages/opencode/src/v2/session-message.ts

@@ -4,6 +4,7 @@ import { SessionEvent } from "./session-event"
 import { EventV2 } from "./event"
 import { ToolOutput } from "./tool-output"
 import { V2Schema } from "./schema"
+import { Modelv2 } from "./model"
 
 export const ID = EventV2.ID
 export type ID = Schema.Schema.Type<typeof ID>
@@ -25,11 +26,7 @@ export class AgentSwitched extends Schema.Class<AgentSwitched>("Session.Message.
 export class ModelSwitched extends Schema.Class<ModelSwitched>("Session.Message.ModelSwitched")({
   ...Base,
   type: Schema.Literal("model-switched"),
-  model: Schema.Struct({
-    id: SessionEvent.ModelSwitched.fields.data.fields.id,
-    providerID: SessionEvent.ModelSwitched.fields.data.fields.providerID,
-    variant: SessionEvent.ModelSwitched.fields.data.fields.variant,
-  }),
+  model: Modelv2.Ref,
 }) {}
 
 export class User extends Schema.Class<User>("Session.Message.User")({
@@ -87,10 +84,7 @@ export class ToolStateError extends Schema.Class<ToolStateError>("Session.Messag
   input: Schema.Record(Schema.String, Schema.Unknown),
   content: ToolOutput.Content.pipe(Schema.Array),
   structured: ToolOutput.Structured,
-  error: Schema.Struct({
-    type: Schema.String,
-    message: Schema.String,
-  }),
+  error: SessionEvent.UnknownError,
 }) {}
 
 export const ToolState = Schema.Union([ToolStatePending, ToolStateRunning, ToolStateCompleted, ToolStateError]).pipe(

packages/opencode/src/v2/session.ts

@@ -3,17 +3,17 @@ import { SessionID } from "@/session/schema"
 import { WorkspaceID } from "@/control-plane/schema"
 import { and, asc, desc, eq, gt, gte, isNull, like, lt, or, type SQL } from "@/storage/db"
 import * as Database from "@/storage/db"
-import { Context, DateTime, Effect, Layer, Schema } from "effect"
+import { Context, DateTime, Effect, Layer, Option, Schema } from "effect"
 import { SessionMessage } from "./session-message"
 import type { Prompt } from "./session-prompt"
 import { EventV2 } from "./event"
 import { ProjectID } from "@/project/schema"
-import { ModelID, ProviderID } from "@/provider/schema"
 import { SessionEvent } from "./session-event"
 import { V2Schema } from "./schema"
 import { optionalOmitUndefined } from "@/util/schema"
+import { Modelv2 } from "./model"
 
-export const Delivery = Schema.Union([Schema.Literal("immediate"), Schema.Literal("deferred")]).annotate({
+export const Delivery = Schema.Literals(["immediate", "deferred"]).annotate({
   identifier: "Session.Delivery",
 })
 export type Delivery = Schema.Schema.Type<typeof Delivery>
@@ -27,11 +27,7 @@ export class Info extends Schema.Class<Info>("Session.Info")({
   workspaceID: optionalOmitUndefined(WorkspaceID),
   path: optionalOmitUndefined(Schema.String),
   agent: optionalOmitUndefined(Schema.String),
-  model: Schema.Struct({
-    id: ModelID,
-    providerID: ProviderID,
-    variant: optionalOmitUndefined(Schema.String),
-  }).pipe(optionalOmitUndefined),
+  model: Modelv2.Ref.pipe(optionalOmitUndefined),
   time: Schema.Struct({
     created: V2Schema.DateTimeUtcFromMillis,
     updated: V2Schema.DateTimeUtcFromMillis,
@@ -53,7 +49,18 @@ export class Info extends Schema.Class<Info>("Session.Info")({
   */
 }) {}
 
+export class NotFoundError extends Schema.TaggedErrorClass<NotFoundError>()("Session.NotFoundError", {
+  sessionID: SessionID,
+}) {}
+
 export interface Interface {
+  readonly create: (input?: {
+    agent?: string
+    model?: Modelv2.Ref
+    parentID?: SessionID
+    workspaceID?: WorkspaceID
+  }) => Effect.Effect<Info>
+  readonly get: (sessionID: SessionID) => Effect.Effect<Info, NotFoundError>
   readonly list: (input: {
     limit?: number
     order?: "asc" | "desc"
@@ -88,13 +95,15 @@ export interface Interface {
   }) => Effect.Effect<SessionMessage.User, never>
   readonly shell: (input: { id?: EventV2.ID; sessionID: SessionID; command: string }) => Effect.Effect<void, never>
   readonly skill: (input: { id?: EventV2.ID; sessionID: SessionID; skill: string }) => Effect.Effect<void, never>
+  readonly subagent: (input: {
+    id?: EventV2.ID
+    parentID: SessionID
+    prompt: Prompt
+    agent: string
+    model?: Modelv2.Ref
+  }) => Effect.Effect<void, NotFoundError>
   readonly switchAgent: (input: { sessionID: SessionID; agent: string }) => Effect.Effect<void, never>
-  readonly switchModel: (input: {
-    sessionID: SessionID
-    id: ModelID
-    providerID: ProviderID
-    variant?: string
-  }) => Effect.Effect<void, never>
+  readonly switchModel: (input: { sessionID: SessionID; model: Modelv2.Ref }) => Effect.Effect<void, never>
   readonly compact: (sessionID: SessionID) => Effect.Effect<void, never>
   readonly wait: (sessionID: SessionID) => Effect.Effect<void, never>
 }
@@ -120,9 +129,9 @@ export const layer = Layer.effect(
         agent: row.agent ?? undefined,
         model: row.model
           ? {
-              id: ModelID.make(row.model.id),
-              providerID: ProviderID.make(row.model.providerID),
-              variant: row.model.variant,
+              id: Modelv2.ID.make(row.model.id),
+              providerID: Modelv2.ProviderID.make(row.model.providerID),
+              variant: Modelv2.VariantID.make(row.model.variant ?? "default"),
             }
           : undefined,
         time: {
@@ -134,6 +143,14 @@ export const layer = Layer.effect(
     }
 
     const result: Interface = {
+      create: Effect.fn("V2Session.create")(function* (_input) {
+        return {} as any
+      }),
+      get: Effect.fn("V2Session.get")(function* (sessionID) {
+        const row = Database.use((db) => db.select().from(SessionTable).where(eq(SessionTable.id, sessionID)).get())
+        if (!row) return yield* new NotFoundError({ sessionID })
+        return fromRow(row)
+      }),
       list: Effect.fn("V2Session.list")(function* (input) {
         const direction = input.cursor?.direction ?? "next"
         let order = input.order ?? "desc"
@@ -262,11 +279,30 @@ export const layer = Layer.effect(
         EventV2.run(SessionEvent.ModelSwitched.Sync, {
           sessionID: input.sessionID,
           timestamp: DateTime.makeUnsafe(Date.now()),
-          id: input.id,
-          providerID: input.providerID,
-          variant: input.variant,
+          model: input.model,
         })
       }),
+      subagent: Effect.fn("V2Session.subagent")(function* (input) {
+        const parent = yield* result.get(input.parentID)
+        const session = yield* result.create({
+          agent: input.agent,
+          model: input.model,
+          parentID: input.parentID,
+          workspaceID: parent.workspaceID,
+        })
+        yield* result.prompt({
+          prompt: input.prompt,
+          sessionID: session.id,
+        })
+        yield* Effect.gen(function* () {
+          yield* result.wait(session.id)
+          const messages = yield* result.messages({ sessionID: session.id, order: "desc" })
+          const assistant = messages.find((msg) => msg.type === "assistant")
+          if (!assistant) return
+          const text = assistant.content.findLast((part) => part.type === "text")
+          if (!text) return
+        }).pipe(Effect.forkChild())
+      }),
       compact: Effect.fn("V2Session.compact")(function* (_sessionID) {}),
       wait: Effect.fn("V2Session.wait")(function* (_sessionID) {}),
     }

packages/opencode/test/acp/agent-interface.test.ts

@@ -34,10 +34,11 @@ describe("acp.agent interface compliance", () => {
     "loadSession",
     "setSessionMode",
     "authenticate",
-    // Unstable - SDK checks these with unstable_ prefix
+    // Capability-gated methods checked by the SDK router
     "listSessions",
+    "resumeSession",
+    "closeSession",
     "unstable_forkSession",
-    "unstable_resumeSession",
     "unstable_setSessionModel",
   ]
 

packages/opencode/test/cli/cmd/tui/dialog-workspace-create.test.ts

@@ -0,0 +1,63 @@
+import { describe, expect, test } from "bun:test"
+import { recentConnectedWorkspaces } from "../../../../src/cli/cmd/tui/component/dialog-workspace-create"
+
+describe("recentConnectedWorkspaces", () => {
+  test("returns unique connected workspaces after filtering missing and inactive entries", () => {
+    const workspaces = [
+      { id: "wrk_a", name: "alpha" },
+      { id: "wrk_b", name: "beta" },
+      { id: "wrk_c", name: "gamma" },
+      { id: "wrk_d", name: "delta" },
+      { id: "wrk_e", name: "epsilon" },
+    ]
+    const status = {
+      wrk_a: "connected",
+      wrk_b: "disconnected",
+      wrk_c: "error",
+      wrk_d: "connected",
+      wrk_e: "connected",
+    } as const
+
+    const { recent } = recentConnectedWorkspaces({
+      sessions: [
+        { time: { updated: 900 } },
+        { workspaceID: "wrk_b", time: { updated: 800 } },
+        { workspaceID: "wrk_a", time: { updated: 700 } },
+        { workspaceID: "wrk_a", time: { updated: 600 } },
+        { workspaceID: "wrk_missing", time: { updated: 500 } },
+        { workspaceID: "wrk_c", time: { updated: 400 } },
+        { workspaceID: "wrk_d", time: { updated: 300 } },
+        { workspaceID: "wrk_e", time: { updated: 200 } },
+      ],
+      get: (workspaceID) => workspaces.find((workspace) => workspace.id === workspaceID),
+      status: (workspaceID) => status[workspaceID as keyof typeof status],
+    })
+
+    expect(recent.map((workspace) => workspace.id)).toEqual(["wrk_a", "wrk_d", "wrk_e"])
+  })
+
+  test("omits the active workspace before limiting recent workspaces", () => {
+    const workspaces = [
+      { id: "wrk_a", name: "alpha" },
+      { id: "wrk_b", name: "beta" },
+      { id: "wrk_c", name: "gamma" },
+      { id: "wrk_d", name: "delta" },
+    ]
+
+    const { recent, hasMore } = recentConnectedWorkspaces({
+      sessions: [
+        { workspaceID: "wrk_a", time: { updated: 400 } },
+        { workspaceID: "wrk_b", time: { updated: 300 } },
+        { workspaceID: "wrk_c", time: { updated: 200 } },
+        { workspaceID: "wrk_d", time: { updated: 100 } },
+      ],
+      get: (workspaceID) => workspaces.find((workspace) => workspace.id === workspaceID),
+      status: () => "connected",
+      limit: 3,
+      omitWorkspaceID: "wrk_a",
+    })
+
+    expect(recent.map((workspace) => workspace.id)).toEqual(["wrk_b", "wrk_c", "wrk_d"])
+    expect(hasMore).toBe(false)
+  })
+})

packages/opencode/test/cli/cmd/tui/provider-options.test.ts

@@ -0,0 +1,29 @@
+import { describe, expect, test } from "bun:test"
+import { normalizeCustomProviderID, providerOptions } from "../../../../src/cli/cmd/tui/component/dialog-provider"
+
+describe("providerOptions", () => {
+  test("includes a synthetic Other option for custom providers", () => {
+    expect(providerOptions([{ id: "openai", name: "OpenAI" }]).at(-1)).toMatchObject({
+      title: "Other",
+      description: "Custom provider",
+      category: "Providers",
+    })
+  })
+
+  test("does not use Other as the generic provider category", () => {
+    expect(providerOptions([{ id: "mistral", name: "Mistral" }])[0]?.category).toBe("Providers")
+  })
+
+  test("does not collide with a configured provider named other", () => {
+    const values = providerOptions([{ id: "other", name: "Other Provider" }]).map((option) => option.value)
+    expect(new Set(values).size).toBe(values.length)
+  })
+
+  test("normalizes and validates custom provider ids", () => {
+    expect(normalizeCustomProviderID("  custom-provider  ")).toBe("custom-provider")
+    expect(normalizeCustomProviderID("custom_provider")).toBe("custom_provider")
+    expect(normalizeCustomProviderID("@ai-sdk/custom-provider")).toBe("custom-provider")
+    expect(normalizeCustomProviderID("-custom-provider")).toBeUndefined()
+    expect(normalizeCustomProviderID("Custom Provider")).toBeUndefined()
+  })
+})

packages/opencode/test/cli/tui/editor-context.test.tsx

@@ -59,6 +59,39 @@ function createWebSocketImpl(...sockets: FakeWebSocket[]) {
   } as unknown as typeof WebSocket
 }
 
+function sendSelection(socket: FakeWebSocket, filePath: string, text = "foo") {
+  socket.message(
+    JSON.stringify({
+      jsonrpc: "2.0",
+      method: "selection_changed",
+      params: {
+        text,
+        filePath,
+        selection: {
+          start: { line: 1, character: 1 },
+          end: { line: 1, character: 4 },
+        },
+      },
+    }),
+  )
+}
+
+function expectedSelection(filePath: string, text = "foo") {
+  return {
+    filePath,
+    source: "websocket" as const,
+    ranges: [
+      {
+        text,
+        selection: {
+          start: { line: 1, character: 1 },
+          end: { line: 1, character: 4 },
+        },
+      },
+    ],
+  }
+}
+
 test("useEditorContext reconnect switches editor server by session directory", async () => {
   await using tmp = await tmpdir()
   const startupDirectory = path.join(tmp.path, "startup")
@@ -93,12 +126,18 @@ test("useEditorContext reconnect switches editor server by session directory", a
   await nextTick()
 
   expect(firstSocket.closed).toBeFalse()
+  sendSelection(firstSocket, path.join(startupDirectory, "file.ts"))
+
+  expect(mounted.editor.selection()).toEqual(expectedSelection(path.join(startupDirectory, "file.ts")))
+  expect(mounted.editor.labelState()).toBe("pending")
 
   mounted.editor.reconnect(sessionDirectory)
   await nextTick()
 
   expect(firstSocket.closed).toBeTrue()
   expect(secondSocket.closed).toBeFalse()
+  expect(mounted.editor.selection()).toBeUndefined()
+  expect(mounted.editor.labelState()).toBe("none")
 
   mounted.dispose()
 })
@@ -131,7 +170,7 @@ test("useEditorContext favors configured port over lock files", async () => {
   mounted.dispose()
 })
 
-test("useEditorContext resets selection when reconnecting", async () => {
+test("useEditorContext clears selection when reconnecting", async () => {
   await using tmp = await tmpdir()
   const startupDirectory = path.join(tmp.path, "startup")
   const ideDirectory = path.join(tmp.path, ".claude", "ide")
@@ -169,45 +208,66 @@ test("useEditorContext resets selection when reconnecting", async () => {
       },
     }),
   )
-  socket.message(
-    JSON.stringify({
-      jsonrpc: "2.0",
-      method: "selection_changed",
-      params: {
-        text: "foo",
-        filePath: path.join(startupDirectory, "file.ts"),
-        selection: {
-          start: { line: 1, character: 1 },
-          end: { line: 1, character: 4 },
-        },
-      },
-    }),
-  )
+  sendSelection(socket, path.join(startupDirectory, "file.ts"))
 
   expect(mounted.editor.connected()).toBeTrue()
   expect(mounted.editor.server()).toEqual({
     protocolVersion: "2025-11-25",
     serverInfo: { name: "test", version: "0.0.0" },
   })
-  expect(mounted.editor.selection()).toEqual({
-    filePath: path.join(startupDirectory, "file.ts"),
-    source: "websocket",
-    ranges: [
-      {
-        text: "foo",
-        selection: {
-          start: { line: 1, character: 1 },
-          end: { line: 1, character: 4 },
-        },
-      },
-    ],
-  })
+  expect(mounted.editor.selection()).toEqual(expectedSelection(path.join(startupDirectory, "file.ts")))
+  expect(mounted.editor.labelState()).toBe("pending")
+  mounted.editor.markSelectionSent()
+  expect(mounted.editor.labelState()).toBe("sent")
 
   mounted.editor.reconnect(startupDirectory)
 
   expect(socket.closed).toBeFalse()
   expect(mounted.editor.connected()).toBeTrue()
   expect(mounted.editor.selection()).toBeUndefined()
+  expect(mounted.editor.labelState()).toBe("none")
+
+  mounted.dispose()
+})
+
+test("useEditorContext preserves selection for the next reconnect when requested", async () => {
+  await using tmp = await tmpdir()
+  const startupDirectory = path.join(tmp.path, "startup")
+  const ideDirectory = path.join(tmp.path, ".claude", "ide")
+  await mkdir(startupDirectory, { recursive: true })
+  await mkdir(ideDirectory, { recursive: true })
+  await writeFile(
+    path.join(ideDirectory, "3001.lock"),
+    JSON.stringify({
+      transport: "ws",
+      workspaceFolders: [startupDirectory],
+    }),
+  )
+
+  process.env.CLAUDE_CODE_SSE_PORT = undefined
+  process.env.KILO_EDITOR_SSE_PORT = undefined
+  spyOn(process, "cwd").mockImplementation(() => startupDirectory)
+  spyOn(os, "homedir").mockImplementation(() => tmp.path)
+  const socket = new FakeWebSocket("ws://127.0.0.1:3001")
+
+  const mounted = mountEditorContext(createWebSocketImpl(socket))
+  await nextTick()
+
+  sendSelection(socket, path.join(startupDirectory, "file.ts"))
+  expect(mounted.editor.selection()).toEqual(expectedSelection(path.join(startupDirectory, "file.ts")))
+
+  mounted.editor.markSelectionSent()
+  mounted.editor.preserveSelectionFromNewSession()
+  mounted.editor.reconnect(startupDirectory)
+
+  expect(socket.closed).toBeFalse()
+  expect(mounted.editor.selection()).toEqual(expectedSelection(path.join(startupDirectory, "file.ts")))
+  expect(mounted.editor.labelState()).toBe("sent")
+
+  mounted.editor.reconnect(startupDirectory)
+
+  expect(mounted.editor.selection()).toBeUndefined()
+  expect(mounted.editor.labelState()).toBe("none")
 
   mounted.dispose()
 })

packages/opencode/test/config/config.test.ts

@@ -2049,6 +2049,83 @@ test("wellknown URL with trailing slash is normalized", async () => {
   }
 })
 
+test("wellknown remote_config supports templated env vars in headers", async () => {
+  const originalFetch = globalThis.fetch
+  const originalToken = process.env.TEST_TOKEN
+  let wellknownFetchedUrl: string | undefined
+  let remoteFetchedUrl: string | undefined
+  let remoteHeaders: HeadersInit | undefined
+  globalThis.fetch = mock((url: string | URL | Request, init?: RequestInit) => {
+    const urlStr = url instanceof Request ? url.url : url instanceof URL ? url.href : url
+    if (urlStr.includes(".well-known/opencode")) {
+      wellknownFetchedUrl = urlStr
+      return Promise.resolve(
+        new Response(
+          JSON.stringify({
+            remote_config: {
+              url: "https://config.example.com/opencode.json",
+              headers: {
+                Authorization: "Bearer {env:TEST_TOKEN}",
+              },
+            },
+          }),
+          { status: 200 },
+        ),
+      )
+    }
+    if (urlStr.includes("config.example.com")) {
+      remoteFetchedUrl = urlStr
+      remoteHeaders = init?.headers
+      return Promise.resolve(
+        new Response(
+          JSON.stringify({
+            mcp: { confluence: { type: "remote", url: "https://confluence.example.com/mcp", enabled: true } },
+          }),
+          { status: 200 },
+        ),
+      )
+    }
+    return originalFetch(url, init)
+  }) as unknown as typeof fetch
+
+  const fakeAuth = Layer.mock(Auth.Service)({
+    all: () =>
+      Effect.succeed({
+        "https://example.com": new Auth.WellKnown({ type: "wellknown", key: "TEST_TOKEN", token: "test-token" }),
+      }),
+  })
+
+  const layer = Config.layer.pipe(
+    Layer.provide(testFlock),
+    Layer.provide(AppFileSystem.defaultLayer),
+    Layer.provide(Env.defaultLayer),
+    Layer.provide(fakeAuth),
+    Layer.provide(emptyAccount),
+    Layer.provideMerge(infra),
+    Layer.provide(noopNpm),
+  )
+
+  try {
+    await provideTmpdirInstance(
+      () =>
+        Config.Service.use((svc) =>
+          Effect.gen(function* () {
+            const config = yield* svc.get()
+            expect(wellknownFetchedUrl).toBe("https://example.com/.well-known/opencode")
+            expect(remoteFetchedUrl).toBe("https://config.example.com/opencode.json")
+            expect(remoteHeaders).toEqual({ Authorization: "Bearer test-token" })
+            expect(config.mcp?.confluence?.enabled).toBe(true)
+          }),
+        ),
+      { git: true },
+    ).pipe(Effect.scoped, Effect.provide(layer), Effect.runPromise)
+  } finally {
+    globalThis.fetch = originalFetch
+    if (originalToken === undefined) delete process.env.TEST_TOKEN
+    else process.env.TEST_TOKEN = originalToken
+  }
+})
+
 describe("resolvePluginSpec", () => {
   test("keeps package specs unchanged", async () => {
     await using tmp = await tmpdir()

packages/opencode/test/control-plane/workspace.test.ts

@@ -1,4 +1,5 @@
 import { afterEach, beforeEach, describe, expect, mock, test } from "bun:test"
+import { $ } from "bun"
 import fs from "node:fs/promises"
 import Http from "node:http"
 import path from "node:path"
@@ -6,7 +7,7 @@ import { setTimeout as delay } from "node:timers/promises"
 import { NodeHttpServer } from "@effect/platform-node"
 import { Effect, Layer } from "effect"
 import { HttpServer, HttpServerRequest, HttpServerResponse } from "effect/unstable/http"
-import { asc, eq } from "drizzle-orm"
+import { eq } from "drizzle-orm"
 import * as Log from "@opencode-ai/core/util/log"
 import { Flag } from "@opencode-ai/core/flag/flag"
 import { GlobalBus, type GlobalEvent } from "@/bus/global"
@@ -16,11 +17,10 @@ import { ProjectTable } from "@/project/project.sql"
 import { Instance } from "@/project/instance"
 import { WithInstance } from "../../src/project/with-instance"
 import { Session as SessionNs } from "@/session/session"
-import { SessionID, MessageID, PartID } from "@/session/schema"
+import { SessionID } from "@/session/schema"
 import { SessionTable } from "@/session/session.sql"
-import { ModelID, ProviderID } from "@/provider/schema"
 import { SyncEvent } from "@/sync"
-import { EventSequenceTable, EventTable } from "@/sync/event.sql"
+import { EventSequenceTable } from "@/sync/event.sql"
 import { resetDatabase } from "../fixture/db"
 import { disposeAllInstances, provideTmpdirInstance, tmpdir } from "../fixture/fixture"
 import { testEffect } from "../lib/effect"
@@ -30,12 +30,17 @@ import { WorkspaceTable } from "../../src/control-plane/workspace.sql"
 import type { Target, WorkspaceAdapter, WorkspaceInfo } from "../../src/control-plane/types"
 import * as WorkspaceOld from "../../src/control-plane/workspace"
 import { AppRuntime } from "@/effect/app-runtime"
+import { InstanceStore } from "@/project/instance-store"
+import { InstanceBootstrap } from "@/project/bootstrap"
 
 void Log.init({ print: false })
 
 const testServerLayer = Layer.mergeAll(
   NodeHttpServer.layer(Http.createServer, { host: "127.0.0.1", port: 0 }),
-  WorkspaceOld.defaultLayer,
+  WorkspaceOld.defaultLayer.pipe(
+    Layer.provide(InstanceStore.defaultLayer),
+    Layer.provide(InstanceBootstrap.defaultLayer),
+  ),
   SessionNs.defaultLayer,
 )
 const it = testEffect(testServerLayer)
@@ -108,11 +113,23 @@ async function withInstance<T>(fn: (dir: string) => T | Promise<T>) {
   })
 }
 
+async function initGitRepo(dir: string) {
+  await fs.mkdir(dir, { recursive: true })
+  await $`git init`.cwd(dir).quiet()
+  await $`git config core.fsmonitor false`.cwd(dir).quiet()
+  await $`git config commit.gpgsign false`.cwd(dir).quiet()
+  await $`git config user.email "test@opencode.test"`.cwd(dir).quiet()
+  await $`git config user.name "Test"`.cwd(dir).quiet()
+  await fs.writeFile(path.join(dir, "tracked.txt"), "base\n")
+  await $`git add tracked.txt`.cwd(dir).quiet()
+  await $`git commit -m "base"`.cwd(dir).quiet()
+}
+
 const runWorkspace = <A, E>(effect: Effect.Effect<A, E, WorkspaceOld.Service>) => AppRuntime.runPromise(effect)
 const createWorkspace = (input: WorkspaceOld.CreateInput) =>
   runWorkspace(WorkspaceOld.Service.use((workspace) => workspace.create(input)))
-const restoreWorkspaceSession = (input: WorkspaceOld.SessionRestoreInput) =>
-  runWorkspace(WorkspaceOld.Service.use((workspace) => workspace.sessionRestore(input)))
+const warpWorkspaceSession = (input: WorkspaceOld.SessionWarpInput) =>
+  runWorkspace(WorkspaceOld.Service.use((workspace) => workspace.sessionWarp(input)))
 const listWorkspaces = (project: Parameters<WorkspaceOld.Interface["list"]>[0]) =>
   runWorkspace(WorkspaceOld.Service.use((workspace) => workspace.list(project)))
 const getWorkspace = (id: WorkspaceID) => runWorkspace(WorkspaceOld.Service.use((workspace) => workspace.get(id)))
@@ -317,48 +334,24 @@ function sessionSequence(sessionID: SessionID) {
   )?.seq
 }
 
-function eventRows(sessionID: SessionID) {
+function sessionSequenceOwner(sessionID: SessionID) {
   return Database.use((db) =>
     db
-      .select({ seq: EventTable.seq, type: EventTable.type, data: EventTable.data })
-      .from(EventTable)
-      .where(eq(EventTable.aggregate_id, sessionID))
-      .orderBy(asc(EventTable.seq))
-      .all(),
-  )
+      .select({ ownerID: EventSequenceTable.owner_id })
+      .from(EventSequenceTable)
+      .where(eq(EventSequenceTable.aggregate_id, sessionID))
+      .get(),
+  )?.ownerID
 }
 
 function sessionUpdatedType() {
   return SyncEvent.versionedType(SessionNs.Event.Updated.type, SessionNs.Event.Updated.version)
 }
 
-function replaceSessionEvents(sessionID: SessionID, count: number) {
-  Database.use((db) => {
-    db.delete(EventSequenceTable).where(eq(EventSequenceTable.aggregate_id, sessionID)).run()
-    if (count === 0) return
-
-    db.insert(EventSequenceTable)
-      .values({ aggregate_id: sessionID, seq: count - 1 })
-      .run()
-    db.insert(EventTable)
-      .values(
-        Array.from({ length: count }, (_, i) => ({
-          id: `evt_${unique(`manual-${i}`)}`,
-          aggregate_id: sessionID,
-          seq: i,
-          type: sessionUpdatedType(),
-          data: { sessionID, info: { title: `manual ${i}` } },
-        })),
-      )
-      .run()
-  })
-}
-
 describe("workspace-old schemas and exports", () => {
   test("keeps the historical event type names", () => {
     expect(WorkspaceOld.Event.Ready.type).toBe("workspace.ready")
     expect(WorkspaceOld.Event.Failed.type).toBe("workspace.failed")
-    expect(WorkspaceOld.Event.Restore.type).toBe("workspace.restore")
     expect(WorkspaceOld.Event.Status.type).toBe("workspace.status")
   })
 
@@ -375,17 +368,6 @@ describe("workspace-old schemas and exports", () => {
     expect(() => WorkspaceOld.CreateInput.zod.parse({ ...input, id: "bad" })).toThrow()
     expect(() => WorkspaceOld.CreateInput.zod.parse({ ...input, branch: 1 })).toThrow()
   })
-
-  test("validates session restore input", () => {
-    const input = {
-      workspaceID: WorkspaceID.ascending("wrk_schema_restore"),
-      sessionID: SessionID.descending("ses_schema_restore"),
-    }
-
-    expect(WorkspaceOld.SessionRestoreInput.zod.parse(input)).toEqual(input)
-    expect(() => WorkspaceOld.SessionRestoreInput.zod.parse({ ...input, workspaceID: "bad" })).toThrow()
-    expect(() => WorkspaceOld.SessionRestoreInput.zod.parse({ ...input, sessionID: "bad" })).toThrow()
-  })
 })
 
 describe("workspace-old CRUD", () => {
@@ -651,6 +633,176 @@ describe("workspace-old CRUD", () => {
       expect(await getWorkspace(info.id)).toBeUndefined()
     })
   })
+
+  test("sessionWarp moves a session into a local workspace and claims ownership", async () => {
+    await withInstance(async (dir) => {
+      const previousType = unique("warp-prev-local")
+      const targetType = unique("warp-target-local")
+      const previous = workspaceInfo(Instance.project.id, previousType)
+      const target = workspaceInfo(Instance.project.id, targetType)
+      insertWorkspace(previous)
+      insertWorkspace(target)
+      registerAdapter(Instance.project.id, previousType, localAdapter(path.join(dir, "warp-prev-local")).adapter)
+      registerAdapter(Instance.project.id, targetType, localAdapter(path.join(dir, "warp-target-local")).adapter)
+      const session = await AppRuntime.runPromise(SessionNs.Service.use((svc) => svc.create({})))
+      attachSessionToWorkspace(session.id, previous.id)
+
+      await warpWorkspaceSession({ workspaceID: target.id, sessionID: session.id })
+
+      expect(
+        Database.use((db) =>
+          db
+            .select({ workspaceID: SessionTable.workspace_id })
+            .from(SessionTable)
+            .where(eq(SessionTable.id, session.id))
+            .get(),
+        )?.workspaceID,
+      ).toBe(target.id)
+      expect(sessionSequenceOwner(session.id)).toBe(target.id)
+    })
+  })
+
+  test("sessionWarp applies source workspace patch to local target workspace", async () => {
+    await withInstance(async (dir) => {
+      const previousType = unique("warp-patch-prev-local")
+      const targetType = unique("warp-patch-target-local")
+      const previousDir = path.join(dir, "warp-patch-prev-local")
+      const targetDir = path.join(dir, "warp-patch-target-local")
+      await initGitRepo(previousDir)
+      await initGitRepo(targetDir)
+      await fs.writeFile(path.join(previousDir, "tracked.txt"), "changed\n")
+      await fs.writeFile(path.join(previousDir, "new.txt"), "new\n")
+
+      const previous = workspaceInfo(Instance.project.id, previousType)
+      const target = workspaceInfo(Instance.project.id, targetType)
+      insertWorkspace(previous)
+      insertWorkspace(target)
+      registerAdapter(Instance.project.id, previousType, localAdapter(previousDir, { createDir: false }).adapter)
+      registerAdapter(Instance.project.id, targetType, localAdapter(targetDir, { createDir: false }).adapter)
+      const session = await AppRuntime.runPromise(SessionNs.Service.use((svc) => svc.create({})))
+      attachSessionToWorkspace(session.id, previous.id)
+
+      await warpWorkspaceSession({ workspaceID: target.id, sessionID: session.id, copyChanges: true })
+
+      expect(await fs.readFile(path.join(targetDir, "tracked.txt"), "utf8")).toBe("changed\n")
+      expect(await fs.readFile(path.join(targetDir, "new.txt"), "utf8")).toBe("new\n")
+    })
+  })
+
+  test("sessionWarp detaches a session to the local project and claims project ownership", async () => {
+    await withInstance(async (dir) => {
+      const previousType = unique("warp-detach-local")
+      const previous = workspaceInfo(Instance.project.id, previousType)
+      insertWorkspace(previous)
+      registerAdapter(Instance.project.id, previousType, localAdapter(path.join(dir, "warp-detach-local")).adapter)
+      const session = await AppRuntime.runPromise(SessionNs.Service.use((svc) => svc.create({})))
+      attachSessionToWorkspace(session.id, previous.id)
+
+      await warpWorkspaceSession({ workspaceID: null, sessionID: session.id })
+
+      expect(
+        Database.use((db) =>
+          db
+            .select({ workspaceID: SessionTable.workspace_id })
+            .from(SessionTable)
+            .where(eq(SessionTable.id, session.id))
+            .get(),
+        )?.workspaceID,
+      ).toBeNull()
+      expect(sessionSequenceOwner(session.id)).toBe(Instance.project.id)
+    })
+  })
+
+  it.live("sessionWarp syncs previous remote history, replays it, steals, and claims the sequence", () => {
+    const calls: FetchCall[] = []
+    let historySessionID: SessionID | undefined
+    let historyNextSeq = 0
+    return Effect.gen(function* () {
+      yield* HttpServer.serveEffect()(
+        Effect.gen(function* () {
+          const req = yield* HttpServerRequest.HttpServerRequest
+          const bodyText = yield* req.text
+          const call = {
+            url: new URL(req.url, "http://localhost"),
+            method: req.method,
+            headers: new Headers(req.headers),
+            bodyText,
+            json: bodyText ? JSON.parse(bodyText) : undefined,
+          }
+          calls.push(call)
+          if (call.url.pathname === "/warp-source/sync/history") {
+            return yield* HttpServerResponse.json([
+              {
+                id: `evt_${unique("warp-source-history")}`,
+                aggregate_id: historySessionID!,
+                seq: historyNextSeq,
+                type: sessionUpdatedType(),
+                data: { sessionID: historySessionID!, info: { title: "from source history" } },
+              },
+            ])
+          }
+          if (call.url.pathname === "/warp-source/vcs/diff/raw") return HttpServerResponse.text("remote patch")
+          if (call.url.pathname === "/warp-target/sync/replay")
+            return yield* HttpServerResponse.json({ sessionID: "ok" })
+          if (call.url.pathname === "/warp-target/sync/steal")
+            return yield* HttpServerResponse.json({ sessionID: "ok" })
+          if (call.url.pathname === "/warp-target/vcs/apply") return yield* HttpServerResponse.json({ applied: true })
+          return HttpServerResponse.text("unexpected", { status: 500 })
+        }),
+      )
+      const url = yield* serverUrl()
+      yield* provideTmpdirInstance(
+        () =>
+          Effect.gen(function* () {
+            const workspace = yield* WorkspaceOld.Service
+            const sessionSvc = yield* SessionNs.Service
+            const previousType = unique("warp-remote-source")
+            const targetType = unique("warp-remote-target")
+            const previous = workspaceInfo(Instance.project.id, previousType)
+            const target = workspaceInfo(Instance.project.id, targetType, { directory: "remote-target-dir" })
+            insertWorkspace(previous)
+            insertWorkspace(target)
+            registerAdapter(Instance.project.id, previousType, remoteAdapter(`${url}/warp-source`).adapter)
+            registerAdapter(Instance.project.id, targetType, remoteAdapter(`${url}/warp-target`).adapter)
+            const session = yield* sessionSvc.create({})
+            attachSessionToWorkspace(session.id, previous.id)
+            historySessionID = session.id
+            historyNextSeq = (sessionSequence(session.id) ?? -1) + 1
+
+            yield* workspace.sessionWarp({ workspaceID: target.id, sessionID: session.id, copyChanges: true })
+
+            expect(calls.map((call) => `${call.method} ${call.url.pathname}`)).toEqual([
+              "POST /warp-source/sync/history",
+              "GET /warp-source/vcs/diff/raw",
+              "POST /warp-target/vcs/apply",
+              "POST /warp-target/sync/replay",
+              "POST /warp-target/sync/steal",
+            ])
+            expect(calls[0].json).toEqual({ [session.id]: historyNextSeq - 1 })
+            expect(calls[2].json).toEqual({ patch: "remote patch" })
+            expect(calls[3].json).toMatchObject({
+              directory: "remote-target-dir",
+              events: [
+                {
+                  aggregateID: session.id,
+                  seq: 0,
+                  type: SyncEvent.versionedType(SessionNs.Event.Created.type, SessionNs.Event.Created.version),
+                },
+                {
+                  aggregateID: session.id,
+                  seq: historyNextSeq,
+                  type: sessionUpdatedType(),
+                },
+              ],
+            })
+            expect(calls[4].json).toEqual({ sessionID: session.id })
+            expect((yield* sessionSvc.get(session.id)).title).toBe("from source history")
+            expect(sessionSequenceOwner(session.id)).toBe(target.id)
+          }),
+        { git: true },
+      )
+    })
+  })
 })
 
 describe("workspace-old sync state", () => {
@@ -958,7 +1110,7 @@ describe("workspace-old sync state", () => {
 
               yield* eventuallyEffect(
                 Effect.gen(function* () {
-                  expect((yield* sessionSvc.get(session.id)).title).toBe("from history")
+                  expect((yield* sessionSvc.get(session.id).pipe(Effect.orDie)).title).toBe("from history")
                 }),
               )
               expect(historyBodies).toEqual([{ [session.id]: historyNextSeq - 1 }])
@@ -1106,7 +1258,7 @@ describe("workspace-old sync state", () => {
 
               yield* eventuallyEffect(
                 Effect.gen(function* () {
-                  expect((yield* sessionSvc.get(session.id)).title).toBe("from sse")
+                  expect((yield* sessionSvc.get(session.id).pipe(Effect.orDie)).title).toBe("from sse")
                 }),
               )
               expect(
@@ -1215,313 +1367,3 @@ describe("workspace-old waitForSync", () => {
     })
   }, 7000)
 })
-
-describe("workspace-old sessionRestore", () => {
-  test("throws when the workspace is missing", async () => {
-    await withInstance(async () => {
-      await expect(
-        restoreWorkspaceSession({
-          workspaceID: WorkspaceID.ascending("wrk_restore_missing"),
-          sessionID: SessionID.descending("ses_restore_missing_workspace"),
-        }),
-      ).rejects.toThrow("Workspace not found: wrk_restore_missing")
-    })
-  })
-
-  test("throws when switching a missing session fails", async () => {
-    await withInstance(async (dir) => {
-      const type = unique("restore-missing-session")
-      const info = workspaceInfo(Instance.project.id, type, { directory: dir })
-      insertWorkspace(info)
-      registerAdapter(Instance.project.id, type, localAdapter(dir).adapter)
-
-      await expect(
-        restoreWorkspaceSession({ workspaceID: info.id, sessionID: SessionID.descending("ses_missing_restore") }),
-      ).rejects.toThrow("NotFoundError")
-      await removeWorkspace(info.id)
-    })
-  })
-
-  it.live("posts remote replay batches of 10, emits progress, and includes the workspace update event", () => {
-    const replay: FetchCall[] = []
-    return Effect.gen(function* () {
-      yield* HttpServer.serveEffect()(
-        Effect.gen(function* () {
-          const req = yield* HttpServerRequest.HttpServerRequest
-          const bodyText = yield* req.text
-          const call = {
-            url: new URL(req.url, "http://localhost"),
-            method: req.method,
-            headers: new Headers(req.headers),
-            bodyText,
-            json: bodyText ? JSON.parse(bodyText) : undefined,
-          }
-          if (call.url.pathname === "/restore/sync/replay") {
-            replay.push(call)
-            return HttpServerResponse.fromWeb(Response.json({ ok: true }))
-          }
-          return HttpServerResponse.text("unexpected", { status: 500 })
-        }),
-      )
-      const url = yield* serverUrl()
-      yield* provideTmpdirInstance(
-        (dir) =>
-          Effect.gen(function* () {
-            const workspace = yield* WorkspaceOld.Service
-            const sessionSvc = yield* SessionNs.Service
-            const captured = captureGlobalEvents()
-            try {
-              const type = unique("restore-remote")
-              const info = workspaceInfo(Instance.project.id, type, { directory: dir })
-              insertWorkspace(info)
-              registerAdapter(
-                Instance.project.id,
-                type,
-                remoteAdapter(`${url}/restore/?ignored=1#hash`, {
-                  directory: dir,
-                  headers: { authorization: "Bearer restore" },
-                }).adapter,
-              )
-              const session = yield* sessionSvc.create({ title: "restore remote" })
-              replaceSessionEvents(session.id, 24)
-
-              const result = yield* workspace.sessionRestore({ workspaceID: info.id, sessionID: session.id })
-
-              expect(result).toEqual({ total: 3 })
-              expect(replay).toHaveLength(3)
-              expect(replay.map((call) => call.url.pathname + call.url.search + call.url.hash)).toEqual([
-                "/restore/sync/replay",
-                "/restore/sync/replay",
-                "/restore/sync/replay",
-              ])
-              expect(replay.every((call) => call.headers.get("authorization") === "Bearer restore")).toBe(true)
-              expect(replay.every((call) => call.headers.get("content-type") === "application/json")).toBe(true)
-              expect(replay.map((call) => (call.json as { events: unknown[] }).events.length)).toEqual([10, 10, 5])
-              expect(replay.map((call) => (call.json as { directory: string }).directory)).toEqual([dir, dir, dir])
-              expect(
-                replay.flatMap((call) =>
-                  (call.json as { events: Array<{ seq: number }> }).events.map((event) => event.seq),
-                ),
-              ).toEqual(Array.from({ length: 25 }, (_, i) => i))
-              expect(
-                (replay[2].json as { events: Array<{ seq: number; type: string; data: unknown }> }).events.at(-1),
-              ).toMatchObject({
-                seq: 24,
-                type: sessionUpdatedType(),
-                data: { sessionID: session.id, info: { workspaceID: info.id } },
-              })
-              expect((yield* sessionSvc.get(session.id)).workspaceID).toBe(info.id)
-              expect(
-                captured.events
-                  .filter(
-                    (event) => event.workspace === info.id && event.payload.type === WorkspaceOld.Event.Restore.type,
-                  )
-                  .map((event) => event.payload.properties.step),
-              ).toEqual([0, 1, 2, 3])
-              yield* workspace.remove(info.id)
-            } finally {
-              captured.dispose()
-            }
-          }),
-        { git: true },
-      )
-    })
-  })
-
-  it.live("remote restore sends an empty directory string when the workspace directory is null", () => {
-    const replay: FetchCall[] = []
-    return Effect.gen(function* () {
-      yield* HttpServer.serveEffect()(
-        Effect.gen(function* () {
-          const req = yield* HttpServerRequest.HttpServerRequest
-          const bodyText = yield* req.text
-          replay.push({
-            url: new URL(req.url, "http://localhost"),
-            method: req.method,
-            headers: new Headers(req.headers),
-            bodyText,
-            json: bodyText ? JSON.parse(bodyText) : undefined,
-          })
-          return HttpServerResponse.fromWeb(Response.json({ ok: true }))
-        }),
-      )
-      const url = yield* serverUrl()
-      yield* provideTmpdirInstance(
-        () =>
-          Effect.gen(function* () {
-            const workspace = yield* WorkspaceOld.Service
-            const sessionSvc = yield* SessionNs.Service
-            const type = unique("restore-null-dir")
-            const info = workspaceInfo(Instance.project.id, type, { directory: null })
-            insertWorkspace(info)
-            registerAdapter(Instance.project.id, type, remoteAdapter(`${url}/null-dir`, { directory: null }).adapter)
-            const session = yield* sessionSvc.create({ title: "null dir" })
-            replaceSessionEvents(session.id, 0)
-
-            expect(yield* workspace.sessionRestore({ workspaceID: info.id, sessionID: session.id })).toEqual({
-              total: 1,
-            })
-            expect((replay[0].json as { directory: string }).directory).toBe("")
-            expect((replay[0].json as { events: unknown[] }).events).toHaveLength(1)
-            yield* workspace.remove(info.id)
-          }),
-        { git: true },
-      )
-    })
-  })
-
-  it.live("remote restore failures include status and body and do not emit completed batch progress", () => {
-    const replay: FetchCall[] = []
-    return Effect.gen(function* () {
-      yield* HttpServer.serveEffect()(
-        Effect.gen(function* () {
-          const req = yield* HttpServerRequest.HttpServerRequest
-          const bodyText = yield* req.text
-          replay.push({
-            url: new URL(req.url, "http://localhost"),
-            method: req.method,
-            headers: new Headers(req.headers),
-            bodyText,
-            json: bodyText ? JSON.parse(bodyText) : undefined,
-          })
-          return HttpServerResponse.text("replay failed", { status: 503 })
-        }),
-      )
-      const url = yield* serverUrl()
-      yield* provideTmpdirInstance(
-        (dir) =>
-          Effect.gen(function* () {
-            const workspace = yield* WorkspaceOld.Service
-            const sessionSvc = yield* SessionNs.Service
-            const captured = captureGlobalEvents()
-            try {
-              const type = unique("restore-remote-fail")
-              const info = workspaceInfo(Instance.project.id, type, { directory: dir })
-              insertWorkspace(info)
-              registerAdapter(Instance.project.id, type, remoteAdapter(`${url}/fail`, { directory: dir }).adapter)
-              const session = yield* sessionSvc.create({ title: "restore fail" })
-              replaceSessionEvents(session.id, 11)
-
-              const error = yield* Effect.flip(
-                workspace.sessionRestore({ workspaceID: info.id, sessionID: session.id }),
-              )
-              expect((error as Error).message).toContain(
-                `Failed to replay session ${session.id} into workspace ${info.id}: HTTP 503 replay failed`,
-              )
-
-              expect(replay).toHaveLength(1)
-              expect(
-                captured.events
-                  .filter(
-                    (event) => event.workspace === info.id && event.payload.type === WorkspaceOld.Event.Restore.type,
-                  )
-                  .map((event) => event.payload.properties.step),
-              ).toEqual([0])
-              yield* workspace.remove(info.id)
-            } finally {
-              captured.dispose()
-            }
-          }),
-        { git: true },
-      )
-    })
-  })
-
-  it.live("local restore replays batches and emits progress", () =>
-    provideTmpdirInstance(
-      (dir) =>
-        Effect.gen(function* () {
-          const workspace = yield* WorkspaceOld.Service
-          const sessionSvc = yield* SessionNs.Service
-          const captured = captureGlobalEvents()
-          try {
-            const type = unique("restore-local")
-            const info = workspaceInfo(Instance.project.id, type, { directory: dir })
-            insertWorkspace(info)
-            registerAdapter(Instance.project.id, type, localAdapter(dir).adapter)
-            const session = yield* sessionSvc.create({ title: "restore local" })
-            replaceSessionEvents(session.id, 20)
-
-            expect(yield* workspace.sessionRestore({ workspaceID: info.id, sessionID: session.id })).toEqual({
-              total: 3,
-            })
-            expect((yield* sessionSvc.get(session.id)).workspaceID).toBe(info.id)
-            expect(eventRows(session.id).map((row) => row.seq)).toEqual(Array.from({ length: 21 }, (_, i) => i))
-            expect(
-              captured.events
-                .filter(
-                  (event) => event.workspace === info.id && event.payload.type === WorkspaceOld.Event.Restore.type,
-                )
-                .map((event) => event.payload.properties.step),
-            ).toEqual([0, 1, 2, 3])
-            yield* workspace.remove(info.id)
-          } finally {
-            captured.dispose()
-          }
-        }),
-      { git: true },
-    ),
-  )
-
-  it.live("session restore includes real message and part events in sequence order", () => {
-    const replay: FetchCall[] = []
-    return Effect.gen(function* () {
-      yield* HttpServer.serveEffect()(
-        Effect.gen(function* () {
-          const req = yield* HttpServerRequest.HttpServerRequest
-          const bodyText = yield* req.text
-          replay.push({
-            url: new URL(req.url, "http://localhost"),
-            method: req.method,
-            headers: new Headers(req.headers),
-            bodyText,
-            json: bodyText ? JSON.parse(bodyText) : undefined,
-          })
-          return HttpServerResponse.fromWeb(Response.json({ ok: true }))
-        }),
-      )
-      const url = yield* serverUrl()
-      yield* provideTmpdirInstance(
-        (dir) =>
-          Effect.gen(function* () {
-            const workspace = yield* WorkspaceOld.Service
-            const sessionSvc = yield* SessionNs.Service
-            const type = unique("restore-real-events")
-            const info = workspaceInfo(Instance.project.id, type, { directory: dir })
-            insertWorkspace(info)
-            registerAdapter(Instance.project.id, type, remoteAdapter(`${url}/real`, { directory: dir }).adapter)
-            const session = yield* sessionSvc.create({ title: "real events" })
-            for (let i = 0; i < 3; i++) {
-              const msg = yield* sessionSvc.updateMessage({
-                id: MessageID.ascending(),
-                role: "user",
-                sessionID: session.id,
-                agent: "build",
-                model: { providerID: ProviderID.make("test"), modelID: ModelID.make("test") },
-                time: { created: Date.now() },
-              })
-              yield* sessionSvc.updatePart({
-                id: PartID.ascending(),
-                sessionID: session.id,
-                messageID: msg.id,
-                type: "text",
-                text: `message ${i}`,
-              })
-            }
-            const before = eventRows(session.id)
-
-            expect(yield* workspace.sessionRestore({ workspaceID: info.id, sessionID: session.id })).toEqual({
-              total: 1,
-            })
-
-            const posted = (replay[0].json as { events: Array<{ seq: number; type: string }> }).events
-            expect(posted.map((event) => event.seq)).toEqual([...before.map((row) => row.seq), before.at(-1)!.seq + 1])
-            expect(posted.map((event) => event.type).slice(0, -1)).toEqual(before.map((row) => row.type))
-            expect(posted.at(-1)?.type).toBe(sessionUpdatedType())
-            yield* workspace.remove(info.id)
-          }),
-        { git: true },
-      )
-    })
-  })
-})

packages/opencode/test/plugin/workspace-adapter.test.ts

@@ -12,8 +12,14 @@ process.env.KILO_DISABLE_DEFAULT_PLUGINS = "1"
 const { Flag } = await import("@opencode-ai/core/flag/flag")
 const { Plugin } = await import("../../src/plugin/index")
 const { Workspace } = await import("../../src/control-plane/workspace")
+const { InstanceBootstrap } = await import("../../src/project/bootstrap")
 const { Instance } = await import("../../src/project/instance")
-const it = testEffect(Layer.mergeAll(Plugin.defaultLayer, Workspace.defaultLayer, CrossSpawnSpawner.defaultLayer))
+const { InstanceStore } = await import("../../src/project/instance-store")
+const workspaceLayer = Workspace.defaultLayer.pipe(
+  Layer.provide(InstanceStore.defaultLayer),
+  Layer.provide(InstanceBootstrap.defaultLayer),
+)
+const it = testEffect(Layer.mergeAll(Plugin.defaultLayer, workspaceLayer, CrossSpawnSpawner.defaultLayer))
 
 const experimental = Flag.KILO_EXPERIMENTAL_WORKSPACES
 

packages/opencode/test/project/vcs.test.ts

@@ -1,5 +1,6 @@
 import { $ } from "bun"
 import { afterEach, describe, expect, test } from "bun:test"
+import { parsePatch } from "diff"
 import { Effect } from "effect"
 import fs from "fs/promises"
 import path from "path"
@@ -288,6 +289,28 @@ describe("Vcs diff", () => {
     })
   })
 
+  test("diff('git') keeps carriage returns inside patch hunks", async () => {
+    await using tmp = await tmpdir({ git: true })
+    await fs.writeFile(path.join(tmp.path, "file.txt"), "keep\nsame\rdiff --git inside\ndelete\n", "utf-8")
+    await $`git add .`.cwd(tmp.path).quiet()
+    await $`git commit --no-gpg-sign -m "add file"`.cwd(tmp.path).quiet()
+    await fs.writeFile(path.join(tmp.path, "file.txt"), "keep\nadd\nsame\rdiff --git inside\n", "utf-8")
+
+    await withVcsOnly(tmp.path, async () => {
+      const diff = await AppRuntime.runPromise(
+        Effect.gen(function* () {
+          const vcs = yield* Vcs.Service
+          return yield* vcs.diff("git")
+        }),
+      )
+      const file = diff.find((item) => item.file === "file.txt")
+
+      expect(file?.patch).toContain(" same\rdiff --git inside")
+      expect(file?.patch).toContain("-delete")
+      expect(() => parsePatch(file?.patch ?? "")).not.toThrow()
+    })
+  }, 20_000)
+
   test("diff('branch') returns changes against default branch", async () => {
     await using tmp = await tmpdir({ git: true })
     await $`git branch -M main`.cwd(tmp.path).quiet()

packages/opencode/test/provider/cf-ai-gateway-e2e.test.ts

@@ -0,0 +1,131 @@
+// End-to-end regression test for opencode#24432.
+//
+// Routes through the actual ai-gateway-provider + @ai-sdk/openai-compatible
+// chain that provider.ts:811 builds at runtime, with only the network boundary
+// stubbed. Asserts that `reasoning_effort` (and other provider options the
+// transform emits) actually land in the body Cloudflare AI Gateway forwards
+// upstream, which is the only place the bug was observable.
+
+import { afterEach, beforeEach, describe, expect, test } from "bun:test"
+import type { JSONValue } from "ai"
+import { generateText } from "ai"
+import { createAiGateway } from "ai-gateway-provider"
+import { createUnified } from "ai-gateway-provider/providers/unified"
+import { ProviderTransform } from "@/provider/transform"
+import type * as Provider from "@/provider/provider"
+import { ModelID, ProviderID } from "@/provider/schema"
+
+type Captured = { url: string; outerBody: unknown }
+type ProviderOptions = Record<string, Record<string, JSONValue>>
+
+const realFetch = globalThis.fetch
+let captured: Captured | null = null
+
+function isRecord(value: unknown): value is Record<string, unknown> {
+  return typeof value === "object" && value !== null && !Array.isArray(value)
+}
+
+beforeEach(() => {
+  captured = null
+  const handle = async (input: Parameters<typeof fetch>[0], init?: Parameters<typeof fetch>[1]): Promise<Response> => {
+    const url = typeof input === "string" ? input : input instanceof URL ? input.toString() : input.url
+    if (url.startsWith("https://gateway.ai.cloudflare.com/")) {
+      const bodyText = typeof init?.body === "string" ? init.body : ""
+      captured = { url, outerBody: bodyText ? JSON.parse(bodyText) : null }
+      return new Response(
+        JSON.stringify({
+          id: "chatcmpl-test",
+          object: "chat.completion",
+          created: 0,
+          model: "openai/gpt-5.4",
+          choices: [{ index: 0, message: { role: "assistant", content: "ok" }, finish_reason: "stop" }],
+          usage: { prompt_tokens: 1, completion_tokens: 1, total_tokens: 2 },
+        }),
+        { status: 200, headers: { "Content-Type": "application/json" } },
+      )
+    }
+    return realFetch(input, init)
+  }
+  // `typeof fetch` includes Bun's `preconnect` method; preserve it from realFetch.
+  const stubFetch: typeof fetch = Object.assign(handle, { preconnect: realFetch.preconnect.bind(realFetch) })
+  globalThis.fetch = stubFetch
+})
+
+afterEach(() => {
+  globalThis.fetch = realFetch
+})
+
+const cfModel = (apiId: string, releaseDate = "2026-03-05"): Provider.Model => ({
+  id: ModelID.make(`cloudflare-ai-gateway/${apiId}`),
+  providerID: ProviderID.make("cloudflare-ai-gateway"),
+  name: apiId,
+  api: { id: apiId, url: "https://gateway.ai.cloudflare.com/v1/compat", npm: "ai-gateway-provider" },
+  capabilities: {
+    reasoning: true,
+    temperature: false,
+    attachment: true,
+    toolcall: true,
+    input: { text: true, audio: false, image: true, video: false, pdf: true },
+    output: { text: true, audio: false, image: false, video: false, pdf: false },
+    interleaved: false,
+  },
+  cost: { input: 1, output: 1, cache: { read: 0, write: 0 } },
+  limit: { context: 1_000_000, output: 128_000 },
+  status: "active",
+  options: {},
+  headers: {},
+  release_date: releaseDate,
+})
+
+// ai-gateway-provider sends an array of step descriptors; each entry's `query`
+// is the body forwarded to the upstream provider.
+function extractUpstreamQuery(body: unknown): Record<string, unknown> | undefined {
+  if (!Array.isArray(body) || body.length === 0) return undefined
+  const first = body[0]
+  if (!isRecord(first)) return undefined
+  const query = first.query
+  return isRecord(query) ? query : undefined
+}
+
+async function callThroughGateway(apiId: string, providerOptions: ProviderOptions) {
+  const aigateway = createAiGateway({ accountId: "test", gateway: "test", apiKey: "test" })
+  const unified = createUnified()
+  await generateText({ model: aigateway(unified(apiId)), prompt: "hi", providerOptions })
+  return extractUpstreamQuery(captured?.outerBody)
+}
+
+describe("cf-ai-gateway end-to-end (regression: #24432)", () => {
+  test("ProviderTransform.providerOptions output puts reasoning_effort on the wire", async () => {
+    // The full chain the runtime exercises:
+    //   transform.providerOptions() -> openaiCompatible key
+    //   -> @ai-sdk/openai-compatible reads it as compatibleOptions
+    //   -> emits body.reasoning_effort
+    //   -> ai-gateway-provider wraps the body and forwards to gateway.ai.cloudflare.com
+    const opts = ProviderTransform.providerOptions(cfModel("openai/gpt-5.4"), { reasoningEffort: "xhigh" })
+    expect(opts).toEqual({ openaiCompatible: { reasoningEffort: "xhigh" } })
+
+    const upstream = await callThroughGateway("openai/gpt-5.4", opts)
+    expect(upstream?.reasoning_effort).toBe("xhigh")
+  })
+
+  test("variants() output for openai/gpt-5.4 lands xhigh on the wire", async () => {
+    // The other half of the bug: workflow `variant: xhigh` flows through variants()
+    // and must reach the wire. variants() returns the providerOptions payload
+    // unwrapped; providerOptions() wraps it under the SDK key.
+    const variants = ProviderTransform.variants(cfModel("openai/gpt-5.4"))
+    expect(variants.xhigh).toEqual({ reasoningEffort: "xhigh" })
+
+    const opts = ProviderTransform.providerOptions(cfModel("openai/gpt-5.4"), variants.xhigh)
+    const upstream = await callThroughGateway("openai/gpt-5.4", opts)
+    expect(upstream?.reasoning_effort).toBe("xhigh")
+  })
+
+  test("legacy buggy key 'cloudflare-ai-gateway' does NOT reach the wire (proves the bug)", async () => {
+    // Sanity: confirms the bug class. If a future change accidentally restores
+    // providerID-keyed providerOptions, this test fails before users notice.
+    const upstream = await callThroughGateway("openai/gpt-5.4", {
+      "cloudflare-ai-gateway": { reasoningEffort: "high" },
+    })
+    expect(upstream?.reasoning_effort).toBeUndefined()
+  })
+})

packages/opencode/test/provider/transform.test.ts

@@ -1123,6 +1123,118 @@ describe("ProviderTransform.message - DeepSeek reasoning content", () => {
   })
 })
 
+describe("ProviderTransform.message - surrogate sanitization", () => {
+  const model = {
+    id: "test/test-model",
+    providerID: "test",
+    api: {
+      id: "test-model",
+      url: "https://api.test.com",
+      npm: "@ai-sdk/openai-compatible",
+    },
+    name: "Test Model",
+    capabilities: {
+      temperature: true,
+      reasoning: true,
+      attachment: true,
+      toolcall: true,
+      input: { text: true, audio: false, image: true, video: false, pdf: false },
+      output: { text: true, audio: false, image: false, video: false, pdf: false },
+      interleaved: false,
+    },
+    cost: { input: 0.001, output: 0.002, cache: { read: 0.0001, write: 0.0002 } },
+    limit: { context: 128000, output: 8192 },
+    status: "active",
+    options: {},
+    headers: {},
+  } as any
+
+  test("replaces lone surrogates in model-visible text", () => {
+    const lone = "\uD83D"
+    const valid = "🚀"
+    const sanitized = "�"
+    const text = (label: string) => `${label} ${lone} and ${valid}`
+    const expected = (label: string) => `${label} ${sanitized} and ${valid}`
+    const msgs = [
+      { role: "system", content: text("system") },
+      { role: "user", content: text("user string") },
+      {
+        role: "user",
+        content: [
+          { type: "text", text: text("user text") },
+          { type: "image", image: "data:image/png;base64,abcd" },
+        ],
+      },
+      { role: "assistant", content: text("assistant string") },
+      {
+        role: "assistant",
+        content: [
+          { type: "text", text: text("assistant text") },
+          { type: "reasoning", text: text("assistant reasoning") },
+          { type: "tool-call", toolCallId: "call-1", toolName: "Read", input: { filePath: ".opencode/tool/emoji.ts" } },
+          {
+            type: "tool-result",
+            toolCallId: "call-2",
+            toolName: "Read",
+            output: { type: "text", value: text("assistant tool text") },
+          },
+          {
+            type: "tool-result",
+            toolCallId: "call-3",
+            toolName: "Read",
+            output: { type: "error-text", value: text("assistant tool error") },
+          },
+          {
+            type: "tool-result",
+            toolCallId: "call-4",
+            toolName: "Read",
+            output: { type: "content", value: [{ type: "text", text: text("assistant tool content") }] },
+          },
+        ],
+      },
+      {
+        role: "tool",
+        content: [
+          {
+            type: "tool-result",
+            toolCallId: "call-5",
+            toolName: "Read",
+            output: { type: "text", value: text("tool text") },
+          },
+          {
+            type: "tool-result",
+            toolCallId: "call-6",
+            toolName: "Read",
+            output: { type: "error-text", value: text("tool error") },
+          },
+          {
+            type: "tool-result",
+            toolCallId: "call-7",
+            toolName: "Read",
+            output: { type: "content", value: [{ type: "text", text: text("tool content") }] },
+          },
+        ],
+      },
+    ] as any[]
+
+    const result = ProviderTransform.message(msgs, model, {}) as any[]
+
+    expect(result[0].content).toBe(expected("system"))
+    expect(result[1].content).toBe(expected("user string"))
+    expect(result[2].content[0].text).toBe(expected("user text"))
+    expect(result[3].content).toBe(expected("assistant string"))
+    expect(result[4].content[0].text).toBe(expected("assistant text"))
+    expect(result[4].content[1].text).toBe(expected("assistant reasoning"))
+    expect(result[4].content[3].output.value).toBe(expected("assistant tool text"))
+    expect(result[4].content[4].output.value).toBe(expected("assistant tool error"))
+    expect(result[4].content[5].output.value[0].text).toBe(expected("assistant tool content"))
+    expect(result[5].content[0].output.value).toBe(expected("tool text"))
+    expect(result[5].content[1].output.value).toBe(expected("tool error"))
+    expect(result[5].content[2].output.value[0].text).toBe(expected("tool content"))
+    expect(result[2].content[1]).toEqual({ type: "image", image: "data:image/png;base64,abcd" })
+  })
+})
+
 describe("ProviderTransform.message - empty image handling", () => {
   const mockModel = {
     id: "anthropic/claude-3-5-sonnet",
@@ -1993,7 +2105,7 @@ describe("ProviderTransform.message - bedrock caching with non-bedrock providerI
     const msgs = [
       {
         role: "system",
-        content: [{ type: "text", text: "You are a helpful assistant" }],
+        content: "You are a helpful assistant",
       },
       {
         role: "user",
@@ -2007,7 +2119,7 @@ describe("ProviderTransform.message - bedrock caching with non-bedrock providerI
     expect(result[0].providerOptions?.bedrock).toEqual({
       cachePoint: { type: "default" },
     })
-    expect(result[0].content[0].providerOptions?.bedrock).toBeUndefined()
+    expect(result[0].content).toBe("You are a helpful assistant")
   })
 })
 
@@ -2044,7 +2156,7 @@ describe("ProviderTransform.message - cache control on gateway", () => {
     const msgs = [
       {
         role: "system",
-        content: [{ type: "text", text: "You are a helpful assistant" }],
+        content: "You are a helpful assistant",
       },
       {
         role: "user",
@@ -2054,7 +2166,7 @@ describe("ProviderTransform.message - cache control on gateway", () => {
 
     const result = ProviderTransform.message(msgs, model, {}) as any[]
 
-    expect(result[0].content[0].providerOptions).toBeUndefined()
+    expect(result[0].content).toBe("You are a helpful assistant")
     expect(result[0].providerOptions).toBeUndefined()
   })
 
@@ -3077,6 +3189,36 @@ describe("ProviderTransform.variants", () => {
       const result = ProviderTransform.variants(model)
       expect(Object.keys(result)).toEqual(["none", "minimal", "low", "medium", "high", "xhigh"])
     })
+
+    test("dotted gpt-5.x ids include 'minimal' (regression: matcher used to miss gpt-5.4)", () => {
+      const model = createMockModel({
+        id: "gpt-5.4",
+        providerID: "openai",
+        api: {
+          id: "gpt-5.4",
+          url: "https://api.openai.com",
+          npm: "@ai-sdk/openai",
+        },
+        release_date: "2026-03-05",
+      })
+      const result = ProviderTransform.variants(model)
+      expect(Object.keys(result)).toEqual(["none", "minimal", "low", "medium", "high", "xhigh"])
+    })
+
+    test("gpt-50 (lookalike) does not get gpt-5 family treatment", () => {
+      const model = createMockModel({
+        id: "gpt-50",
+        providerID: "openai",
+        api: {
+          id: "gpt-50",
+          url: "https://api.openai.com",
+          npm: "@ai-sdk/openai",
+        },
+        release_date: "2024-01-01",
+      })
+      const result = ProviderTransform.variants(model)
+      expect(Object.keys(result)).toEqual(["low", "medium", "high"])
+    })
   })
 
   describe("@ai-sdk/anthropic", () => {
@@ -3609,8 +3751,87 @@ describe("ProviderTransform.variants", () => {
       expect(result).toEqual({})
     })
   })
+  // kilocode_change end
+
+  describe("ai-gateway-provider (cloudflare-ai-gateway)", () => {
+    const cfModel = (apiId: string, releaseDate = "2024-01-01") =>
+      createMockModel({
+        id: `cloudflare-ai-gateway/${apiId}`,
+        providerID: "cloudflare-ai-gateway",
+        api: {
+          id: apiId,
+          url: "https://gateway.ai.cloudflare.com/v1/compat",
+          npm: "ai-gateway-provider",
+        },
+        release_date: releaseDate,
+      })
+
+    test("openai gpt-5.4 includes xhigh effort (regression: variant=xhigh used to be silently ignored)", () => {
+      const result = ProviderTransform.variants(cfModel("openai/gpt-5.4", "2026-03-05"))
+      expect(result.xhigh).toEqual({ reasoningEffort: "xhigh" })
+      expect(result.high).toEqual({ reasoningEffort: "high" })
+      expect(Object.keys(result)).toContain("minimal")
+    })
+
+    test("openai gpt-5.2-codex includes xhigh", () => {
+      const result = ProviderTransform.variants(cfModel("openai/gpt-5.2-codex", "2025-12-11"))
+      expect(result.xhigh).toEqual({ reasoningEffort: "xhigh" })
+      expect(Object.keys(result)).toEqual(["low", "medium", "high", "xhigh"])
+    })
+
+    test("openai gpt-4o (no reasoning) returns empty", () => {
+      const model = cfModel("openai/gpt-4o")
+      model.capabilities.reasoning = false
+      const result = ProviderTransform.variants(model)
+      expect(result).toEqual({})
+    })
+
+    test("non-openai upstream falls back to widely-supported OAI efforts", () => {
+      const result = ProviderTransform.variants(cfModel("anthropic/claude-sonnet-4-6"))
+      expect(result).toEqual({
+        low: { reasoningEffort: "low" },
+        medium: { reasoningEffort: "medium" },
+        high: { reasoningEffort: "high" },
+      })
+    })
+  })
+})
+
+describe("ProviderTransform.providerOptions - ai-gateway-provider", () => {
+  const createModel = (overrides: Partial<any> = {}) =>
+    ({
+      id: "cloudflare-ai-gateway/openai/gpt-5.4",
+      providerID: "cloudflare-ai-gateway",
+      api: {
+        id: "openai/gpt-5.4",
+        url: "https://gateway.ai.cloudflare.com/v1/compat",
+        npm: "ai-gateway-provider",
+      },
+      capabilities: {
+        temperature: false,
+        reasoning: true,
+        attachment: true,
+        toolcall: true,
+        input: { text: true, audio: false, image: true, video: false, pdf: true },
+        output: { text: true, audio: false, image: false, video: false, pdf: false },
+        interleaved: false,
+      },
+      cost: { input: 1, output: 1, cache: { read: 0, write: 0 } },
+      limit: { context: 1_000_000, output: 128_000 },
+      status: "active",
+      options: {},
+      headers: {},
+      release_date: "2026-03-05",
+      ...overrides,
+    }) as any
+
+  test("routes options under openaiCompatible (the key @ai-sdk/openai-compatible reads)", () => {
+    // Regression: previously fell back to providerID="cloudflare-ai-gateway",
+    // which @ai-sdk/openai-compatible never reads, silently dropping reasoningEffort.
+    const result = ProviderTransform.providerOptions(createModel(), { reasoningEffort: "high" })
+    expect(result).toEqual({ openaiCompatible: { reasoningEffort: "high" } })
+  })
 })
-// kilocode_change end
 
 // kilocode_change start - tests for reasoningSummary guard
 describe("ProviderTransform.options - OpenAI Responses API params guard", () => {

packages/opencode/test/server/httpapi-cors.test.ts

@@ -63,6 +63,19 @@ describe("HttpApi CORS", () => {
     }),
   )
 
+  it.live("adds CORS headers to legacy unauthorized responses", () =>
+    Effect.gen(function* () {
+      const response = yield* Effect.promise(async () =>
+        Server.Legacy().app.request("/global/config", {
+          headers: { origin: "https://app.opencode.ai" },
+        }),
+      )
+
+      expect(response.status).toBe(401)
+      expect(response.headers.get("access-control-allow-origin")).toBe("https://app.opencode.ai")
+    }),
+  )
+
   it.live("uses custom CORS origins passed to the server", () =>
     Effect.gen(function* () {
       const listener = yield* Effect.acquireRelease(

packages/opencode/test/server/httpapi-instance-context.test.ts

@@ -13,8 +13,8 @@ import { InstanceRef, WorkspaceRef } from "../../src/effect/instance-ref"
 // kilocode_change start - avoid InstanceLayer.layer's lazy bootstrap import in this test graph.
 import { InstanceBootstrap } from "../../src/project/bootstrap"
 import { Instance } from "../../src/project/instance"
-import { InstanceStore } from "../../src/project/instance-store"
 // kilocode_change end
+import { InstanceStore } from "../../src/project/instance-store"
 import { Project } from "../../src/project/project"
 import { disposeMiddleware, markInstanceForDisposal } from "../../src/server/routes/instance/httpapi/lifecycle"
 import { instanceRouterMiddleware } from "../../src/server/routes/instance/httpapi/middleware/instance-context"
@@ -39,6 +39,11 @@ const testStateLayer = Layer.effectDiscard(
   }),
 )
 
+const workspaceLayer = Workspace.defaultLayer.pipe(
+  Layer.provide(InstanceStore.defaultLayer),
+  Layer.provide(InstanceBootstrap.defaultLayer),
+)
+
 const it = testEffect(
   Layer.mergeAll(
     testStateLayer,
@@ -48,7 +53,7 @@ const it = testEffect(
     InstanceStore.defaultLayer.pipe(Layer.provide(InstanceBootstrap.defaultLayer)),
     // kilocode_change end
     Project.defaultLayer,
-    Workspace.defaultLayer,
+    workspaceLayer,
   ),
 )
 

packages/opencode/test/server/httpapi-parity.test.ts

@@ -105,23 +105,22 @@ describe("404 mapping for missing session", () => {
 })
 
 // ──────────────────────────────────────────────────────────────────────────────
-// Reproducer 3: 404 response body shape should match Hono's NamedError
-// envelope `{ name, data: { message } }`. HttpApi returns the typed-error
-// shape `{ _tag }` instead. SDK consumers reading `error.data.message`
-// see undefined.
-//
-// FIXME: unskip when error JSON shape policy is decided + applied (separate PR).
+// Reproducer 3: 404 response body shape should match Hono's public NamedError
+// envelope `{ name, data: { message } }`. SDK consumers read
+// `error.data.message`, so returning an Effect built-in `{ _tag }` body is a
+// compatibility break.
 // ──────────────────────────────────────────────────────────────────────────────
 describe("Error JSON shape parity", () => {
-  test.todo("HttpApi 404 body matches NamedError shape", async () => {
+  test("HttpApi 404 body matches Hono shape", async () => {
     await using tmp = await tmpdir({ config: { formatter: false, lsp: false } })
+    const headers = { "x-kilo-directory": tmp.path }
 
-    const response = await app(true).request("/session/ses_does_not_exist", {
-      headers: { "x-kilo-directory": tmp.path },
-    })
+    const hono = await app(false).request("/session/ses_does_not_exist", { headers })
+    const httpapi = await app(true).request("/session/ses_does_not_exist", { headers })
 
-    expect(response.status).toBe(404)
-    const body = (await response.json()) as { name?: string; data?: { message?: string } }
+    expect(httpapi.status).toBe(hono.status)
+    const body = (await httpapi.json()) as { name?: string; data?: { message?: string } }
+    expect(body).toEqual(await hono.json())
     expect(body.name).toBe("NotFoundError")
     expect(typeof body.data?.message).toBe("string")
   })

packages/opencode/test/server/httpapi-pty.test.ts

@@ -50,9 +50,9 @@ const effectIt = testEffect(
   ),
 )
 
-function app() {
-  Flag.KILO_EXPERIMENTAL_HTTPAPI = true
-  return Server.Default().app
+function app(experimental = true) {
+  Flag.KILO_EXPERIMENTAL_HTTPAPI = experimental
+  return experimental ? Server.Default().app : Server.Legacy().app
 }
 
 function serverUrl() {
@@ -121,6 +121,18 @@ describe("pty HttpApi bridge", () => {
     expect(missing.status).toBe(404)
   })
 
+  test("matches Hono missing PTY error body", async () => {
+    await using tmp = await tmpdir({ git: true, config: { formatter: false, lsp: false } })
+    const headers = { "x-kilo-directory": tmp.path }
+    const path = PtyPaths.get.replace(":ptyID", PtyID.ascending())
+
+    const hono = await app(false).request(path, { headers })
+    const httpapi = await app().request(path, { headers })
+
+    expect(httpapi.status).toBe(hono.status)
+    expect(await httpapi.json()).toEqual(await hono.json())
+  })
+
   test("returns 404 for missing PTY websocket before upgrade", async () => {
     await using tmp = await tmpdir({ git: true, config: { formatter: false, lsp: false } })
     const response = await app().request(PtyPaths.connect.replace(":ptyID", PtyID.ascending()), {

packages/opencode/test/server/httpapi-sdk.test.ts

@@ -4,6 +4,7 @@ import type * as Scope from "effect/Scope"
 import { HttpRouter } from "effect/unstable/http"
 import { Flag } from "@opencode-ai/core/flag/flag"
 import { createKiloClient } from "@kilocode/sdk/v2"
+import { validateSession } from "../../src/cli/cmd/tui/validate-session"
 import { Instance } from "../../src/project/instance"
 import { WithInstance } from "../../src/project/with-instance"
 import { ExperimentalHttpApiServer } from "../../src/server/routes/instance/httpapi/server"
@@ -13,6 +14,7 @@ import { MessageV2 } from "../../src/session/message-v2"
 import { ModelID, ProviderID } from "../../src/provider/schema"
 import type { Config } from "@/config/config"
 import { Session as SessionNs } from "@/session/session"
+import { errorMessage } from "../../src/util/error"
 import { TestLLMServer } from "../lib/llm-server"
 import path from "path"
 import { resetDatabase } from "../fixture/db"
@@ -64,20 +66,23 @@ function client(
   directory?: string,
   input?: { password?: string; username?: string; headers?: Record<string, string> },
 ) {
-  const serverApp = app(backend, input)
-  const fetch = Object.assign(
-    async (request: RequestInfo | URL, init?: RequestInit) =>
-      await serverApp.fetch(request instanceof Request ? request : new Request(request, init)),
-    { preconnect: globalThis.fetch.preconnect },
-  ) satisfies typeof globalThis.fetch
   return createKiloClient({
     baseUrl: "http://localhost",
     directory,
     headers: input?.headers,
-    fetch,
+    fetch: serverFetch(backend, input),
   })
 }
 
+function serverFetch(backend: Backend, input?: { password?: string; username?: string }) {
+  const serverApp = app(backend, input)
+  return Object.assign(
+    async (request: RequestInfo | URL, init?: RequestInit) =>
+      await serverApp.fetch(request instanceof Request ? request : new Request(request, init)),
+    { preconnect: globalThis.fetch.preconnect },
+  ) satisfies typeof globalThis.fetch
+}
+
 function authorization(username: string, password: string) {
   return `Basic ${Buffer.from(`${username}:${password}`).toString("base64")}`
 }
@@ -129,6 +134,16 @@ function capture(request: () => Promise<SdkResult>) {
   )
 }
 
+function captureThrown(request: () => Promise<unknown>) {
+  return call(async () => {
+    try {
+      await request()
+    } catch (error) {
+      return error
+    }
+  })
+}
+
 function expectStatus(request: () => Promise<{ response: Response }>, status: number) {
   return call(request).pipe(
     Effect.tap((result) => Effect.sync(() => expect(result.response.status).toBe(status))),
@@ -355,6 +370,46 @@ describe("HttpApi SDK", () => {
     ),
   )
 
+  parity("matches generated SDK missing session errors across backends", (backend) =>
+    withStandardProject(backend, ({ sdk }) =>
+      Effect.gen(function* () {
+        const sessionID = "ses_missing"
+        const expected = {
+          name: "NotFoundError",
+          data: { message: `Session not found: ${sessionID}` },
+        }
+        const missing = yield* capture(() => sdk.session.get({ sessionID }))
+        const thrown = yield* captureThrown(() => sdk.session.get({ sessionID }, { throwOnError: true }))
+
+        expect(missing.error).toEqual(expected)
+        expect(thrown).toEqual(expected)
+        return {
+          status: missing.status,
+          error: missing.error,
+          thrown,
+        }
+      }),
+    ),
+  )
+
+  parity("formats missing session validation errors for -s", (backend) =>
+    withStandardProject(backend, ({ directory }) =>
+      Effect.gen(function* () {
+        const sessionID = "ses_206f84f18ffeZ6hhD7pFYAiW5T"
+        const thrown = yield* captureThrown(() =>
+          validateSession({
+            url: "http://localhost",
+            directory,
+            sessionID,
+            fetch: serverFetch(backend),
+          }),
+        )
+        expect(errorMessage(thrown)).toBe(`Session not found: ${sessionID}`)
+        return errorMessage(thrown)
+      }),
+    ),
+  )
+
   parity("matches generated SDK basic auth behavior across backends", (backend) =>
     withStandardProject(backend, ({ directory }) =>
       Effect.gen(function* () {

packages/opencode/test/server/httpapi-session.test.ts

@@ -1,24 +1,26 @@
 import { afterEach, describe, expect } from "bun:test"
 import { mkdir } from "node:fs/promises"
 import path from "node:path"
-import { Effect } from "effect"
+import { Effect, Layer } from "effect"
 import { Flag } from "@opencode-ai/core/flag/flag"
 import { registerAdapter } from "../../src/control-plane/adapters"
 import type { WorkspaceAdapter } from "../../src/control-plane/types"
 import { Workspace } from "../../src/control-plane/workspace"
 import { PermissionID } from "../../src/permission/schema"
 import { ModelID, ProviderID } from "../../src/provider/schema"
-import { Instance } from "../../src/project/instance"
 import { WithInstance } from "../../src/project/with-instance"
+import { InstanceBootstrap } from "../../src/project/bootstrap"
+import { InstanceStore } from "../../src/project/instance-store"
 import { Project } from "../../src/project/project"
 import { Server } from "../../src/server/server"
 import { SessionPaths } from "../../src/server/routes/instance/httpapi/groups/session"
 import { Session } from "@/session/session"
-import { MessageID, PartID, type SessionID } from "../../src/session/schema"
+import { MessageID, PartID, SessionID, type SessionID as SessionIDType } from "../../src/session/schema"
 import { MessageV2 } from "../../src/session/message-v2"
 import { Database } from "@/storage/db"
 import { SessionMessageTable, SessionTable } from "@/session/session.sql"
 import { SessionMessage } from "../../src/v2/session-message"
+import { Modelv2 } from "../../src/v2/model"
 import * as DateTime from "effect/DateTime"
 import * as Log from "@opencode-ai/core/util/log"
 import { eq } from "drizzle-orm"
@@ -30,6 +32,10 @@ void Log.init({ print: false })
 
 const original = Flag.KILO_EXPERIMENTAL_HTTPAPI
 const originalWorkspaces = Flag.KILO_EXPERIMENTAL_WORKSPACES
+const workspaceLayer = Workspace.defaultLayer.pipe(
+  Layer.provide(InstanceStore.defaultLayer),
+  Layer.provide(InstanceBootstrap.defaultLayer),
+)
 
 function app(experimental = true) {
   Flag.KILO_EXPERIMENTAL_HTTPAPI = experimental
@@ -54,7 +60,7 @@ function createSession(directory: string, input?: Session.CreateInput) {
   )
 }
 
-function createTextMessage(directory: string, sessionID: SessionID, text: string) {
+function createTextMessage(directory: string, sessionID: SessionIDType, text: string) {
   return Effect.promise(
     async () =>
       await WithInstance.provide({
@@ -106,7 +112,7 @@ const createLocalWorkspace = (input: { projectID: Project.Info["id"]; type: stri
         extra: null,
         projectID: input.projectID,
       }),
-    ).pipe(Effect.provide(Workspace.defaultLayer))
+    ).pipe(Effect.provide(workspaceLayer))
   })
 
 function request(path: string, init?: RequestInit) {
@@ -124,6 +130,10 @@ function json<T>(response: Response) {
   })
 }
 
+function responseJson(response: Response) {
+  return Effect.promise(() => response.json())
+}
+
 function requestJson<T>(path: string, init?: RequestInit) {
   return request(path, init).pipe(Effect.flatMap(json<T>))
 }
@@ -146,6 +156,47 @@ afterEach(async () => {
 })
 
 describe("session HttpApi", () => {
+  it.live(
+    "returns declared not found errors for read routes",
+    withTmp({ git: true, config: { formatter: false, lsp: false } }, (tmp) =>
+      Effect.gen(function* () {
+        const headers = { "x-kilo-directory": tmp.path }
+        const missingSession = SessionID.descending()
+        const missingSessionBody = {
+          name: "NotFoundError",
+          data: { message: `Session not found: ${missingSession}` },
+        }
+
+        const get = yield* request(pathFor(SessionPaths.get, { sessionID: missingSession }), { headers })
+        expect(get.status).toBe(404)
+        expect(yield* responseJson(get)).toEqual(missingSessionBody)
+
+        const messages = yield* request(pathFor(SessionPaths.messages, { sessionID: missingSession }), { headers })
+        expect(messages.status).toBe(404)
+        expect(yield* responseJson(messages)).toEqual(missingSessionBody)
+
+        const remove = yield* request(pathFor(SessionPaths.remove, { sessionID: missingSession }), {
+          headers,
+          method: "DELETE",
+        })
+        expect(remove.status).toBe(404)
+        expect(yield* responseJson(remove)).toEqual(missingSessionBody)
+
+        const session = yield* createSession(tmp.path, { title: "missing message" })
+        const missingMessage = MessageID.ascending()
+        const message = yield* request(
+          pathFor(SessionPaths.message, { sessionID: session.id, messageID: missingMessage }),
+          { headers },
+        )
+        expect(message.status).toBe(404)
+        expect(yield* responseJson(message)).toEqual({
+          name: "NotFoundError",
+          data: { message: `Message not found: ${missingMessage}` },
+        })
+      }),
+    ),
+  )
+
   it.live(
     "serves read routes through Hono bridge",
     withTmp({ git: true, config: { formatter: false, lsp: false } }, (tmp) =>
@@ -214,7 +265,11 @@ describe("session HttpApi", () => {
                 id: SessionMessage.ID.create(),
                 type: "assistant",
                 agent: "build",
-                model: { id: "model", providerID: "provider" },
+                model: {
+                  id: Modelv2.ID.make("model"),
+                  providerID: Modelv2.ProviderID.make("provider"),
+                  variant: Modelv2.VariantID.make("default"),
+                },
                 time: { created: DateTime.makeUnsafe(1) },
                 content: [],
               })

packages/opencode/test/server/httpapi-tui.test.ts

@@ -72,14 +72,27 @@ describe("tui HttpApi bridge", () => {
       properties: { text: "from publish" },
     })
 
+    const missingSessionID = SessionID.descending()
     const missing = await app().request(TuiPaths.selectSession, {
       method: "POST",
       headers: { ...headers, "content-type": "application/json" },
-      body: JSON.stringify({ sessionID: SessionID.descending() }),
+      body: JSON.stringify({ sessionID: missingSessionID }),
     })
     expect(missing.status).toBe(404)
   })
 
+  test("matches Hono missing selected session error body", async () => {
+    await using tmp = await tmpdir({ git: true, config: { formatter: false, lsp: false } })
+    const headers = { "x-kilo-directory": tmp.path, "content-type": "application/json" }
+    const body = JSON.stringify({ sessionID: SessionID.descending() })
+
+    const hono = await app(false).request(TuiPaths.selectSession, { method: "POST", headers, body })
+    const httpapi = await app().request(TuiPaths.selectSession, { method: "POST", headers, body })
+
+    expect(httpapi.status).toBe(hono.status)
+    expect(await httpapi.json()).toEqual(await hono.json())
+  })
+
   test("matches legacy unknown execute command behavior", async () => {
     await using tmp = await tmpdir({ git: true, config: { formatter: false, lsp: false } })
     const headers = { "x-kilo-directory": tmp.path, "content-type": "application/json" }

packages/opencode/test/server/httpapi-workspace-routing.test.ts

@@ -20,6 +20,8 @@ import { WorkspaceID } from "../../src/control-plane/schema"
 import type { WorkspaceAdapter } from "../../src/control-plane/types"
 import { Workspace } from "../../src/control-plane/workspace"
 import { WorkspaceTable } from "../../src/control-plane/workspace.sql"
+import { InstanceBootstrap } from "../../src/project/bootstrap"
+import { InstanceStore } from "../../src/project/instance-store"
 import { Project } from "../../src/project/project"
 import { WorkspacePaths } from "../../src/server/routes/instance/httpapi/groups/workspace"
 import {
@@ -45,13 +47,18 @@ const testStateLayer = Layer.effectDiscard(
   }),
 )
 
+const workspaceLayer = Workspace.defaultLayer.pipe(
+  Layer.provide(InstanceStore.defaultLayer),
+  Layer.provide(InstanceBootstrap.defaultLayer),
+)
+
 const it = testEffect(
   Layer.mergeAll(
     testStateLayer,
     NodeHttpServer.layerTest,
     NodeServices.layer,
     Project.defaultLayer,
-    Workspace.defaultLayer,
+    workspaceLayer,
     Socket.layerWebSocketConstructorGlobal,
   ),
 )

packages/opencode/test/server/httpapi-workspace.test.ts

@@ -14,6 +14,8 @@ import { Server } from "../../src/server/server"
 import { resetDatabase } from "../fixture/db"
 import { disposeAllInstances, provideInstance, tmpdirScoped } from "../fixture/fixture"
 import { Instance } from "../../src/project/instance"
+import { InstanceBootstrap } from "../../src/project/bootstrap"
+import { InstanceStore } from "../../src/project/instance-store"
 import { Project } from "../../src/project/project"
 import { InstancePaths } from "../../src/server/routes/instance/httpapi/groups/instance"
 import { WorkspaceRef } from "../../src/effect/instance-ref"
@@ -23,9 +25,11 @@ void Log.init({ print: false })
 
 const originalWorkspaces = Flag.KILO_EXPERIMENTAL_WORKSPACES
 const originalHttpApi = Flag.KILO_EXPERIMENTAL_HTTPAPI
-const it = testEffect(
-  Layer.mergeAll(NodeServices.layer, Project.defaultLayer, Session.defaultLayer, Workspace.defaultLayer),
+const workspaceLayer = Workspace.defaultLayer.pipe(
+  Layer.provide(InstanceStore.defaultLayer),
+  Layer.provide(InstanceBootstrap.defaultLayer),
 )
+const it = testEffect(Layer.mergeAll(NodeServices.layer, Project.defaultLayer, Session.defaultLayer, workspaceLayer))
 
 function request(path: string, directory: string, init: RequestInit = {}, httpApi = true) {
   return Effect.promise(() => {
@@ -168,22 +172,19 @@ describe("workspace HttpApi", () => {
       const created = yield* request(WorkspacePaths.list, dir, {
         method: "POST",
         headers: { "content-type": "application/json" },
-        body: JSON.stringify({ type: "local-test", branch: null, extra: null }),
+        body: JSON.stringify({ type: "local-test", branch: null }),
       })
       expect(created.status).toBe(200)
       const workspace = (yield* Effect.promise(() => created.json())) as Workspace.Info
       expect(workspace).toMatchObject({ type: "local-test", name: "local-test" })
 
       const session = yield* Session.Service.use((svc) => svc.create({})).pipe(provideInstance(dir))
-      const restored = yield* request(WorkspacePaths.sessionRestore.replace(":id", workspace.id), dir, {
+      const warped = yield* request(WorkspacePaths.warp, dir, {
         method: "POST",
         headers: { "content-type": "application/json" },
-        body: JSON.stringify({ sessionID: session.id }),
-      })
-      expect(restored.status).toBe(200)
-      expect((yield* Effect.promise(() => restored.json())) as { total: number }).toMatchObject({
-        total: expect.any(Number),
+        body: JSON.stringify({ id: workspace.id, sessionID: session.id }),
       })
+      expect(warped.status).toBe(204)
 
       const removed = yield* request(WorkspacePaths.remove.replace(":id", workspace.id), dir, { method: "DELETE" })
       expect(removed.status).toBe(200)
@@ -212,7 +213,6 @@ describe("workspace HttpApi", () => {
       expect((yield* Effect.promise(() => created.json())) as Workspace.Info).toMatchObject({
         type: "local-test",
         name: "local-test",
-        extra: null,
       })
     }),
   )
@@ -257,7 +257,6 @@ describe("workspace HttpApi", () => {
       expect((yield* Effect.promise(() => created.json())) as Workspace.Info).toMatchObject({
         type: "local-test",
         name: "local-test",
-        extra: null,
       })
     }),
   )
@@ -272,7 +271,7 @@ describe("workspace HttpApi", () => {
       const created = yield* request(WorkspacePaths.list, dir, {
         method: "POST",
         headers: { "content-type": "application/json" },
-        body: JSON.stringify({ type: "local-target", branch: null, extra: null }),
+        body: JSON.stringify({ type: "local-target", branch: null }),
       })
       const workspace = (yield* Effect.promise(() => created.json())) as Workspace.Info
 
@@ -327,7 +326,7 @@ describe("workspace HttpApi", () => {
       const created = yield* request(WorkspacePaths.list, dir, {
         method: "POST",
         headers: { "content-type": "application/json" },
-        body: JSON.stringify({ type: "remote-target", branch: null, extra: null }),
+        body: JSON.stringify({ type: "remote-target", branch: null }),
       })
       const workspace = (yield* Effect.promise(() => created.json())) as Workspace.Info
 
@@ -394,7 +393,7 @@ describe("workspace HttpApi", () => {
       const created = yield* request(WorkspacePaths.list, dir, {
         method: "POST",
         headers: { "content-type": "application/json" },
-        body: JSON.stringify({ type: "remote-session-target", branch: null, extra: null }),
+        body: JSON.stringify({ type: "remote-session-target", branch: null }),
       })
       const workspace = (yield* Effect.promise(() => created.json())) as Workspace.Info
       const session = yield* Session.Service.use((svc) => svc.create()).pipe(

packages/opencode/test/session/compaction.test.ts

@@ -1219,7 +1219,9 @@ describe("session.compaction.process", () => {
           expect(captured).not.toContain("keep tail")
 
           const filtered = MessageV2.filterCompacted(MessageV2.stream(session.id))
-          expect(filtered[0]?.info.id).toBe(keep.id)
+          expect(filtered.map((msg) => msg.info.id).slice(0, 3)).toEqual([parent!, expect.any(String), keep.id])
+          expect(filtered[1]?.info.role).toBe("assistant")
+          expect(filtered[1]?.info.role === "assistant" ? filtered[1].info.summary : false).toBe(true)
           expect(filtered.map((msg) => msg.info.id)).not.toContain(large.id)
         } finally {
           await rt.dispose()

packages/opencode/test/session/message-v2.test.ts

@@ -1098,6 +1098,108 @@ describe("session.message-v2.toModelMessage", () => {
       },
     ])
   })
+
+  test("substitutes space for empty text between signed reasoning blocks", async () => {
+    // Reproduces the bug pattern: [reasoning(sig), text(""), reasoning(sig), text(full)]
+    const assistantID = "m-assistant"
+    const input: MessageV2.WithParts[] = [
+      {
+        info: assistantInfo(assistantID, "m-parent"),
+        parts: [
+          { ...basePart(assistantID, "p1"), type: "step-start" },
+          {
+            ...basePart(assistantID, "p2"),
+            type: "reasoning",
+            text: "thinking-one",
+            metadata: { anthropic: { signature: "sig1" } },
+          },
+          { ...basePart(assistantID, "p3"), type: "text", text: "" },
+          { ...basePart(assistantID, "p4"), type: "step-start" },
+          {
+            ...basePart(assistantID, "p5"),
+            type: "reasoning",
+            text: "thinking-two",
+            metadata: { anthropic: { signature: "sig2" } },
+          },
+          { ...basePart(assistantID, "p6"), type: "text", text: "the answer" },
+        ] as MessageV2.Part[],
+      },
+    ]
+
+    const result = await MessageV2.toModelMessages(input, model)
+
+    // step-start splits into two assistant messages; SDK's groupIntoBlocks merges them later
+    expect(result).toHaveLength(2)
+    expect((result[0].content as any[]).find((p) => p.type === "text").text).toBe(" ")
+    expect((result[1].content as any[]).find((p) => p.type === "text").text).toBe("the answer")
+  })
+
+  test("substitutes space for empty text when reasoning signature is under 'bedrock' namespace", async () => {
+    // AWS Bedrock hosts Anthropic Claude but stores signatures under metadata.bedrock
+    const assistantID = "m-assistant-bedrock"
+    const input: MessageV2.WithParts[] = [
+      {
+        info: assistantInfo(assistantID, "m-parent"),
+        parts: [
+          {
+            ...basePart(assistantID, "p1"),
+            type: "reasoning",
+            text: "thinking-bedrock",
+            metadata: { bedrock: { signature: "bedrock-sig" } },
+          },
+          { ...basePart(assistantID, "p2"), type: "text", text: "" },
+          { ...basePart(assistantID, "p3"), type: "text", text: "answer" },
+        ] as MessageV2.Part[],
+      },
+    ]
+
+    const result = await MessageV2.toModelMessages(input, model)
+
+    expect(result).toHaveLength(1)
+    const texts = (result[0].content as any[]).filter((p) => p.type === "text")
+    expect(texts.map((t) => t.text)).toStrictEqual([" ", "answer"])
+  })
+
+  test("leaves empty text alone when reasoning has no Anthropic signature", async () => {
+    // Non-Anthropic providers' reasoning doesn't position-validate, so empty text
+    // should be filtered normally rather than substituted.
+    const assistantID = "m-assistant-unsigned"
+    const input: MessageV2.WithParts[] = [
+      {
+        info: assistantInfo(assistantID, "m-parent"),
+        parts: [
+          { ...basePart(assistantID, "p1"), type: "reasoning", text: "thinking" },
+          { ...basePart(assistantID, "p2"), type: "text", text: "" },
+          { ...basePart(assistantID, "p3"), type: "text", text: "answer" },
+        ] as MessageV2.Part[],
+      },
+    ]
+
+    const result = await MessageV2.toModelMessages(input, model)
+
+    expect(result).toHaveLength(1)
+    const texts = (result[0].content as any[]).filter((p) => p.type === "text")
+    expect(texts.map((t) => t.text)).toStrictEqual(["", "answer"])
+  })
+
+  test("leaves empty text alone in assistant messages without reasoning", async () => {
+    const assistantID = "m-assistant-no-reasoning"
+    const input: MessageV2.WithParts[] = [
+      {
+        info: assistantInfo(assistantID, "m-parent"),
+        parts: [
+          { ...basePart(assistantID, "p1"), type: "text", text: "" },
+          { ...basePart(assistantID, "p2"), type: "text", text: "hello" },
+        ] as MessageV2.Part[],
+      },
+    ]
+
+    const result = await MessageV2.toModelMessages(input, model)
+
+    expect(result).toHaveLength(1)
+    const texts = (result[0].content as any[]).filter((p) => p.type === "text")
+    expect(texts.map((t) => t.text)).toStrictEqual(["", "hello"])
+  })
 })
 
 describe("session.message-v2.fromError", () => {

packages/opencode/test/session/messages-pagination.test.ts

@@ -834,7 +834,7 @@ describe("MessageV2.filterCompacted", () => {
 
         const result = MessageV2.filterCompacted(MessageV2.stream(session.id))
 
-        expect(result.map((item) => item.info.id)).toEqual([u2, a2, c1, s1, u3, a3])
+        expect(result.map((item) => item.info.id)).toEqual([c1, s1, u2, a2, u3, a3])
 
         await svc.remove(session.id)
       },
@@ -889,7 +889,7 @@ describe("MessageV2.filterCompacted", () => {
         })
 
         const parentFiltered = MessageV2.filterCompacted(MessageV2.stream(session.id))
-        expect(parentFiltered.map((item) => item.info.id)).toEqual([u2, a2, c1, s1, u3, a3])
+        expect(parentFiltered.map((item) => item.info.id)).toEqual([c1, s1, u2, a2, u3, a3])
 
         const forked = await svc.fork({ sessionID: session.id })
         const childFiltered = MessageV2.filterCompacted(MessageV2.stream(forked.id))
@@ -964,7 +964,7 @@ describe("MessageV2.filterCompacted", () => {
 
         const result = MessageV2.filterCompacted(MessageV2.stream(session.id))
 
-        expect(result.map((item) => item.info.id)).toEqual([a3, c1, s1, u3, a4])
+        expect(result.map((item) => item.info.id)).toEqual([c1, s1, a3, u3, a4])
 
         await svc.remove(session.id)
       },
@@ -1041,7 +1041,7 @@ describe("MessageV2.filterCompacted", () => {
 
         const result = MessageV2.filterCompacted(MessageV2.stream(session.id))
 
-        expect(result.map((item) => item.info.id)).toEqual([u3, a3, c2, s2, u4, a4])
+        expect(result.map((item) => item.info.id)).toEqual([c2, s2, u3, a3, u4, a4])
 
         await svc.remove(session.id)
       },

packages/opencode/test/session/prompt.test.ts

@@ -946,6 +946,43 @@ it.live(
 )
 // kilocode_change end
 
+it.live(
+  "cancel propagates from slash command subtask to child session",
+  () =>
+    provideTmpdirServer(
+      Effect.fnUntraced(function* ({ llm }) {
+        const prompt = yield* SessionPrompt.Service
+        const sessions = yield* Session.Service
+        const status = yield* SessionStatus.Service
+        const chat = yield* sessions.create({ title: "Pinned" })
+        yield* llm.hang
+        const msg = yield* user(chat.id, "hello")
+        yield* addSubtask(chat.id, msg.id)
+
+        const fiber = yield* prompt.loop({ sessionID: chat.id }).pipe(Effect.forkChild)
+        yield* llm.wait(1)
+
+        const msgs = yield* MessageV2.filterCompactedEffect(chat.id)
+        const taskMsg = msgs.find((item) => item.info.role === "assistant" && item.info.agent === "general")
+        const tool = taskMsg ? toolPart(taskMsg.parts) : undefined
+        const sessionID = tool?.state.status === "running" ? tool.state.metadata?.sessionId : undefined
+        expect(typeof sessionID).toBe("string")
+        if (typeof sessionID !== "string") throw new Error("missing child session id")
+        const childID = SessionID.make(sessionID)
+        expect((yield* status.get(childID)).type).toBe("busy")
+
+        yield* prompt.cancel(chat.id)
+        const exit = yield* Fiber.await(fiber)
+        expect(Exit.isSuccess(exit)).toBe(true)
+
+        expect((yield* status.get(chat.id)).type).toBe("idle")
+        expect((yield* status.get(childID)).type).toBe("idle")
+      }),
+      { git: true, config: providerCfg },
+    ),
+  10_000,
+)
+
 it.live(
   "cancel with queued callers resolves all cleanly",
   () =>

packages/opencode/test/sync/index.test.ts

@@ -5,7 +5,7 @@ import { CrossSpawnSpawner } from "@opencode-ai/core/cross-spawn-spawner"
 import { Bus } from "../../src/bus"
 import { SyncEvent } from "../../src/sync"
 import { Database } from "@/storage/db"
-import { EventTable } from "../../src/sync/event.sql"
+import { EventSequenceTable, EventTable } from "../../src/sync/event.sql"
 import { MessageID } from "../../src/session/schema"
 import { Flag } from "@opencode-ai/core/flag/flag"
 import { initProjectors } from "../../src/server/projectors"
@@ -252,5 +252,76 @@ describe("SyncEvent", () => {
         }),
       ),
     )
+
+    it.live(
+      "claims unowned event sequence on replay with ownerID",
+      provideTmpdirInstance(() =>
+        Effect.gen(function* () {
+          const { Created } = setup()
+          const id = MessageID.ascending()
+
+          yield* SyncEvent.use.replay(
+            {
+              id: "evt_1",
+              type: SyncEvent.versionedType(Created.type, Created.version),
+              seq: 0,
+              aggregateID: id,
+              data: { id, name: "owned" },
+            },
+            { publish: false, ownerID: "owner-1" },
+          )
+
+          const row = Database.use((db) =>
+            db
+              .select({ seq: EventSequenceTable.seq, ownerID: EventSequenceTable.owner_id })
+              .from(EventSequenceTable)
+              .get(),
+          )
+          expect(row).toEqual({ seq: 0, ownerID: "owner-1" })
+        }),
+      ),
+    )
+
+    it.live(
+      "ignores replay from a different owner after sequence is claimed",
+      provideTmpdirInstance(() =>
+        Effect.gen(function* () {
+          const { Created } = setup()
+          const id = MessageID.ascending()
+
+          yield* SyncEvent.use.replay(
+            {
+              id: "evt_1",
+              type: SyncEvent.versionedType(Created.type, Created.version),
+              seq: 0,
+              aggregateID: id,
+              data: { id, name: "first" },
+            },
+            { publish: false, ownerID: "owner-1" },
+          )
+          yield* SyncEvent.use.replay(
+            {
+              id: "evt_2",
+              type: SyncEvent.versionedType(Created.type, Created.version),
+              seq: 1,
+              aggregateID: id,
+              data: { id, name: "ignored" },
+            },
+            { publish: false, ownerID: "owner-2" },
+          )
+
+          const events = Database.use((db) => db.select().from(EventTable).all())
+          const sequence = Database.use((db) =>
+            db
+              .select({ seq: EventSequenceTable.seq, ownerID: EventSequenceTable.owner_id })
+              .from(EventSequenceTable)
+              .get(),
+          )
+          expect(events).toHaveLength(1)
+          expect(events[0].id).toBe("evt_1")
+          expect(sequence).toEqual({ seq: 0, ownerID: "owner-1" })
+        }),
+      ),
+    )
   })
 })

packages/opencode/test/tool/task.test.ts

@@ -1,9 +1,8 @@
 import { afterEach, describe, expect } from "bun:test"
-import { Effect, Layer } from "effect"
+import { Effect, Exit, Fiber, Layer } from "effect"
 import { Agent } from "../../src/agent/agent"
 import { Config } from "@/config/config"
 import { CrossSpawnSpawner } from "@opencode-ai/core/cross-spawn-spawner"
-import { Instance } from "../../src/project/instance"
 import { Session } from "@/session/session"
 import { MessageV2 } from "../../src/session/message-v2"
 import type { SessionPrompt } from "../../src/session/prompt"
@@ -12,7 +11,7 @@ import { ModelID, ProviderID } from "../../src/provider/schema"
 import { TaskTool, type TaskPromptOps } from "../../src/tool/task"
 import { Truncate } from "@/tool/truncate"
 import { ToolRegistry } from "@/tool/registry"
-import { disposeAllInstances, provideTmpdirInstance } from "../fixture/fixture"
+import { disposeAllInstances } from "../fixture/fixture"
 import { testEffect } from "../lib/effect"
 
 afterEach(async () => {
@@ -35,6 +34,14 @@ const it = testEffect(
   ),
 )
 
+function defer<T>() {
+  let resolve!: (value: T | PromiseLike<T>) => void
+  const promise = new Promise<T>((done) => {
+    resolve = done
+  })
+  return { promise, resolve }
+}
+
 const seed = Effect.fn("TaskToolTest.seed")(function* (title = "Pinned") {
   const session = yield* Session.Service
   const chat = yield* session.create({ title })
@@ -72,7 +79,7 @@ function stubOps(opts?: {
   childCost?: number
 }): TaskPromptOps {
   return {
-    cancel() {},
+    cancel: () => Effect.void,
     resolvePromptParts: (template) => Effect.succeed([{ type: "text" as const, text: template }]),
     prompt: (input) =>
       Effect.gen(function* () {
@@ -118,102 +125,271 @@ function reply(input: SessionPrompt.PromptInput, text: string): MessageV2.WithPa
 }
 
 describe("tool.task", () => {
-  it.live("description sorts subagents by name and is stable across calls", () =>
-    provideTmpdirInstance(
-      () =>
-        Effect.gen(function* () {
-          const agent = yield* Agent.Service
-          const build = yield* agent.get("build")
-          const registry = yield* ToolRegistry.Service
-          const get = Effect.fnUntraced(function* () {
-            const tools = yield* registry.tools({ ...ref, agent: build })
-            return tools.find((tool) => tool.id === TaskTool.id)?.description ?? ""
-          })
-          const first = yield* get()
-          const second = yield* get()
+  it.instance(
+    "description sorts subagents by name and is stable across calls",
+    () =>
+      Effect.gen(function* () {
+        const agent = yield* Agent.Service
+        const build = yield* agent.get("build")
+        const registry = yield* ToolRegistry.Service
+        const get = Effect.fnUntraced(function* () {
+          const tools = yield* registry.tools({ ...ref, agent: build })
+          return tools.find((tool) => tool.id === TaskTool.id)?.description ?? ""
+        })
+        const first = yield* get()
+        const second = yield* get()
 
-          expect(first).toBe(second)
+        expect(first).toBe(second)
 
-          const alpha = first.indexOf("- alpha: Alpha agent")
-          const explore = first.indexOf("- explore:")
-          const general = first.indexOf("- general:")
-          const zebra = first.indexOf("- zebra: Zebra agent")
+        const alpha = first.indexOf("- alpha: Alpha agent")
+        const explore = first.indexOf("- explore:")
+        const general = first.indexOf("- general:")
+        const zebra = first.indexOf("- zebra: Zebra agent")
 
-          expect(alpha).toBeGreaterThan(-1)
-          expect(explore).toBeGreaterThan(alpha)
-          expect(general).toBeGreaterThan(explore)
-          expect(zebra).toBeGreaterThan(general)
-        }),
-      {
-        config: {
-          agent: {
-            zebra: {
-              description: "Zebra agent",
-              mode: "subagent",
-            },
-            alpha: {
-              description: "Alpha agent",
-              mode: "subagent",
-            },
+        expect(alpha).toBeGreaterThan(-1)
+        expect(explore).toBeGreaterThan(alpha)
+        expect(general).toBeGreaterThan(explore)
+        expect(zebra).toBeGreaterThan(general)
+      }),
+    {
+      config: {
+        agent: {
+          zebra: {
+            description: "Zebra agent",
+            mode: "subagent",
+          },
+          alpha: {
+            description: "Alpha agent",
+            mode: "subagent",
           },
         },
       },
-    ),
+    },
   )
 
-  it.live("description hides denied subagents for the caller", () =>
-    provideTmpdirInstance(
-      () =>
-        Effect.gen(function* () {
-          const agent = yield* Agent.Service
-          const build = yield* agent.get("build")
-          const registry = yield* ToolRegistry.Service
-          const description =
-            (yield* registry.tools({ ...ref, agent: build })).find((tool) => tool.id === TaskTool.id)?.description ?? ""
+  it.instance(
+    "description hides denied subagents for the caller",
+    () =>
+      Effect.gen(function* () {
+        const agent = yield* Agent.Service
+        const build = yield* agent.get("build")
+        const registry = yield* ToolRegistry.Service
+        const description =
+          (yield* registry.tools({ ...ref, agent: build })).find((tool) => tool.id === TaskTool.id)?.description ?? ""
 
-          expect(description).toContain("- alpha: Alpha agent")
-          expect(description).not.toContain("- zebra: Zebra agent")
-        }),
-      {
-        config: {
-          permission: {
-            task: {
-              "*": "allow",
-              zebra: "deny",
-            },
+        expect(description).toContain("- alpha: Alpha agent")
+        expect(description).not.toContain("- zebra: Zebra agent")
+      }),
+    {
+      config: {
+        permission: {
+          task: {
+            "*": "allow",
+            zebra: "deny",
           },
-          agent: {
-            zebra: {
-              description: "Zebra agent",
-              mode: "subagent",
-            },
-            alpha: {
-              description: "Alpha agent",
-              mode: "subagent",
-            },
+        },
+        agent: {
+          zebra: {
+            description: "Zebra agent",
+            mode: "subagent",
+          },
+          alpha: {
+            description: "Alpha agent",
+            mode: "subagent",
           },
         },
       },
-    ),
+    },
   )
 
-  it.live("execute resumes an existing task session from task_id", () =>
-    provideTmpdirInstance(() =>
+  it.instance("execute resumes an existing task session from task_id", () =>
+    Effect.gen(function* () {
+      const sessions = yield* Session.Service
+      const { chat, assistant } = yield* seed()
+      const child = yield* sessions.create({ parentID: chat.id, title: "Existing child" })
+      const tool = yield* TaskTool
+      const def = yield* tool.init()
+      let seen: SessionPrompt.PromptInput | undefined
+      const promptOps = stubOps({ text: "resumed", onPrompt: (input) => (seen = input) })
+
+      const result = yield* def.execute(
+        {
+          description: "inspect bug",
+          prompt: "look into the cache key path",
+          subagent_type: "general",
+          task_id: child.id,
+        },
+        {
+          sessionID: chat.id,
+          messageID: assistant.id,
+          agent: "build",
+          abort: new AbortController().signal,
+          extra: { promptOps },
+          messages: [],
+          metadata: () => Effect.void,
+          ask: () => Effect.void,
+        },
+      )
+
+      const kids = yield* sessions.children(chat.id)
+      expect(kids).toHaveLength(1)
+      expect(kids[0]?.id).toBe(child.id)
+      expect(result.metadata.sessionId).toBe(child.id)
+      expect(result.output).toContain(`task_id: ${child.id}`)
+      expect(seen?.sessionID).toBe(child.id)
+    }),
+  )
+
+  it.instance("execute asks by default and skips checks when bypassed", () =>
+    Effect.gen(function* () {
+      const { chat, assistant } = yield* seed()
+      const tool = yield* TaskTool
+      const def = yield* tool.init()
+      const calls: unknown[] = []
+      const promptOps = stubOps()
+
+      const exec = (extra?: Record<string, any>) =>
+        def.execute(
+          {
+            description: "inspect bug",
+            prompt: "look into the cache key path",
+            subagent_type: "general",
+          },
+          {
+            sessionID: chat.id,
+            messageID: assistant.id,
+            agent: "build",
+            abort: new AbortController().signal,
+            extra: { promptOps, ...extra },
+            messages: [],
+            metadata: () => Effect.void,
+            ask: (input) =>
+              Effect.sync(() => {
+                calls.push(input)
+              }),
+          },
+        )
+
+      yield* exec()
+      yield* exec({ bypassAgentCheck: true })
+
+      expect(calls).toHaveLength(1)
+      expect(calls[0]).toEqual({
+        permission: "task",
+        patterns: ["general"],
+        always: ["*"],
+        metadata: {
+          description: "inspect bug",
+          subagent_type: "general",
+        },
+      })
+    }),
+  )
+
+  it.instance("execute cancels child session when abort signal fires", () =>
+    Effect.gen(function* () {
+      const { chat, assistant } = yield* seed()
+      const tool = yield* TaskTool
+      const def = yield* tool.init()
+      const ready = defer<SessionPrompt.PromptInput>()
+      const cancelled = defer<SessionID>()
+      const abort = new AbortController()
+      const promptOps: TaskPromptOps = {
+        cancel: (sessionID) =>
+          Effect.sync(() => {
+            cancelled.resolve(sessionID)
+          }),
+        resolvePromptParts: (template) => Effect.succeed([{ type: "text" as const, text: template }]),
+        prompt: (input) =>
+          Effect.promise(() => {
+            ready.resolve(input)
+            return cancelled.promise
+          }).pipe(Effect.as(reply(input, "cancelled"))),
+      }
+
+      const fiber = yield* def
+        .execute(
+          {
+            description: "inspect bug",
+            prompt: "look into the cache key path",
+            subagent_type: "general",
+          },
+          {
+            sessionID: chat.id,
+            messageID: assistant.id,
+            agent: "build",
+            abort: abort.signal,
+            extra: { promptOps },
+            messages: [],
+            metadata: () => Effect.void,
+            ask: () => Effect.void,
+          },
+        )
+        .pipe(Effect.forkChild)
+
+      const input = yield* Effect.promise(() => ready.promise)
+      abort.abort()
+      expect(yield* Effect.promise(() => cancelled.promise)).toBe(input.sessionID)
+
+      const exit = yield* Fiber.await(fiber)
+      expect(Exit.isSuccess(exit)).toBe(true)
+    }),
+  )
+
+  it.instance("execute creates a child when task_id does not exist", () =>
+    Effect.gen(function* () {
+      const sessions = yield* Session.Service
+      const { chat, assistant } = yield* seed()
+      const tool = yield* TaskTool
+      const def = yield* tool.init()
+      let seen: SessionPrompt.PromptInput | undefined
+      const promptOps = stubOps({ text: "created", onPrompt: (input) => (seen = input) })
+
+      const result = yield* def.execute(
+        {
+          description: "inspect bug",
+          prompt: "look into the cache key path",
+          subagent_type: "general",
+          task_id: "ses_missing",
+        },
+        {
+          sessionID: chat.id,
+          messageID: assistant.id,
+          agent: "build",
+          abort: new AbortController().signal,
+          extra: { promptOps },
+          messages: [],
+          metadata: () => Effect.void,
+          ask: () => Effect.void,
+        },
+      )
+
+      const kids = yield* sessions.children(chat.id)
+      expect(kids).toHaveLength(1)
+      expect(kids[0]?.id).toBe(result.metadata.sessionId)
+      expect(result.metadata.sessionId).not.toBe("ses_missing")
+      expect(result.output).toContain(`task_id: ${result.metadata.sessionId}`)
+      expect(seen?.sessionID).toBe(result.metadata.sessionId)
+    }),
+  )
+
+  
+    it.instance(
+    "execute shapes child permissions for task, todowrite, and primary tools",
+    () =>
       Effect.gen(function* () {
         const sessions = yield* Session.Service
         const { chat, assistant } = yield* seed()
-        const child = yield* sessions.create({ parentID: chat.id, title: "Existing child" })
         const tool = yield* TaskTool
         const def = yield* tool.init()
         let seen: SessionPrompt.PromptInput | undefined
-        const promptOps = stubOps({ text: "resumed", onPrompt: (input) => (seen = input) })
+        const promptOps = stubOps({ onPrompt: (input) => (seen = input) })
 
         const result = yield* def.execute(
           {
             description: "inspect bug",
             prompt: "look into the cache key path",
-            subagent_type: "general",
-            task_id: child.id,
+            subagent_type: "reviewer",
           },
           {
             sessionID: chat.id,
@@ -227,184 +403,57 @@ describe("tool.task", () => {
           },
         )
 
-        const kids = yield* sessions.children(chat.id)
-        expect(kids).toHaveLength(1)
-        expect(kids[0]?.id).toBe(child.id)
-        expect(result.metadata.sessionId).toBe(child.id)
-        expect(result.output).toContain(`task_id: ${child.id}`)
-        expect(seen?.sessionID).toBe(child.id)
-      }),
-    ),
-  )
-
-  it.live("execute asks by default and skips checks when bypassed", () =>
-    provideTmpdirInstance(() =>
-      Effect.gen(function* () {
-        const { chat, assistant } = yield* seed()
-        const tool = yield* TaskTool
-        const def = yield* tool.init()
-        const calls: unknown[] = []
-        const promptOps = stubOps()
-
-        const exec = (extra?: Record<string, any>) =>
-          def.execute(
+        const child = yield* sessions.get(result.metadata.sessionId)
+        expect(child.parentID).toBe(chat.id)
+        // kilocode_change start — use arrayContaining: Kilo appends inherited caller restrictions
+        expect(child.permission).toEqual(
+          expect.arrayContaining([
             {
-              description: "inspect bug",
-              prompt: "look into the cache key path",
-              subagent_type: "general",
+              permission: "todowrite",
+              pattern: "*",
+              action: "deny",
             },
             {
-              sessionID: chat.id,
-              messageID: assistant.id,
-              agent: "build",
-              abort: new AbortController().signal,
-              extra: { promptOps, ...extra },
-              messages: [],
-              metadata: () => Effect.void,
-              ask: (input) =>
-                Effect.sync(() => {
-                  calls.push(input)
-                }),
+              permission: "bash",
+              pattern: "*",
+              action: "allow",
             },
-          )
-
-        yield* exec()
-        yield* exec({ bypassAgentCheck: true })
-
-        expect(calls).toHaveLength(1)
-        expect(calls[0]).toEqual({
-          permission: "task",
-          patterns: ["general"],
-          always: ["*"],
-          metadata: {
-            description: "inspect bug",
-            subagent_type: "general",
-          },
+            {
+              permission: "read",
+              pattern: "*",
+              action: "allow",
+            },
+            {
+              permission: "task",
+              pattern: "*",
+              action: "deny",
+            },
+          ]),
+        )
+        // kilocode_change end
+        expect(seen?.tools).toEqual({
+          todowrite: false,
+          task: false, // kilocode_change - Kilo disallows nested subagents
+          bash: false,
+          read: false,
         })
       }),
-    ),
-  )
-
-  it.live("execute creates a child when task_id does not exist", () =>
-    provideTmpdirInstance(() =>
-      Effect.gen(function* () {
-        const sessions = yield* Session.Service
-        const { chat, assistant } = yield* seed()
-        const tool = yield* TaskTool
-        const def = yield* tool.init()
-        let seen: SessionPrompt.PromptInput | undefined
-        const promptOps = stubOps({ text: "created", onPrompt: (input) => (seen = input) })
-
-        const result = yield* def.execute(
-          {
-            description: "inspect bug",
-            prompt: "look into the cache key path",
-            subagent_type: "general",
-            task_id: "ses_missing",
-          },
-          {
-            sessionID: chat.id,
-            messageID: assistant.id,
-            agent: "build",
-            abort: new AbortController().signal,
-            extra: { promptOps },
-            messages: [],
-            metadata: () => Effect.void,
-            ask: () => Effect.void,
-          },
-        )
-
-        const kids = yield* sessions.children(chat.id)
-        expect(kids).toHaveLength(1)
-        expect(kids[0]?.id).toBe(result.metadata.sessionId)
-        expect(result.metadata.sessionId).not.toBe("ses_missing")
-        expect(result.output).toContain(`task_id: ${result.metadata.sessionId}`)
-        expect(seen?.sessionID).toBe(result.metadata.sessionId)
-      }),
-    ),
-  )
-
-  it.live("execute shapes child permissions for task, todowrite, and primary tools", () =>
-    provideTmpdirInstance(
-      () =>
-        Effect.gen(function* () {
-          const sessions = yield* Session.Service
-          const { chat, assistant } = yield* seed()
-          const tool = yield* TaskTool
-          const def = yield* tool.init()
-          let seen: SessionPrompt.PromptInput | undefined
-          const promptOps = stubOps({ onPrompt: (input) => (seen = input) })
-
-          const result = yield* def.execute(
-            {
-              description: "inspect bug",
-              prompt: "look into the cache key path",
-              subagent_type: "reviewer",
+    {
+      config: {
+        agent: {
+          reviewer: {
+            mode: "subagent",
+            permission: {
+              task: "allow",
             },
-            {
-              sessionID: chat.id,
-              messageID: assistant.id,
-              agent: "build",
-              abort: new AbortController().signal,
-              extra: { promptOps },
-              messages: [],
-              metadata: () => Effect.void,
-              ask: () => Effect.void,
-            },
-          )
-
-          const child = yield* sessions.get(result.metadata.sessionId)
-          expect(child.parentID).toBe(chat.id)
-          // kilocode_change start — use arrayContaining: Kilo appends inherited caller restrictions
-          expect(child.permission).toEqual(
-            expect.arrayContaining([
-              {
-                permission: "todowrite",
-                pattern: "*",
-                action: "deny",
-              },
-              {
-                permission: "bash",
-                pattern: "*",
-                action: "allow",
-              },
-              {
-                permission: "read",
-                pattern: "*",
-                action: "allow",
-              },
-              {
-                permission: "task",
-                pattern: "*",
-                action: "deny",
-              },
-            ]),
-          )
-          // kilocode_change end
-          expect(seen?.tools).toEqual({
-            todowrite: false,
-            task: false, // kilocode_change - Kilo disallows nested subagents
-            bash: false,
-            read: false,
-          })
-        }),
-      {
-        config: {
-          agent: {
-            reviewer: {
-              mode: "subagent",
-              permission: {
-                task: "allow",
-              },
-            },
-          },
-          experimental: {
-            primary_tools: ["bash", "read"],
-            openTelemetry: true, // kilocode_change
           },
         },
+        experimental: {
+          primary_tools: ["bash", "read"],
+          openTelemetry: true, // kilocode_change
+        },
       },
-    ),
+    },
   )
 })
 

packages/opencode/test/v2/session-message-updater.test.ts

@@ -2,6 +2,7 @@ import { expect, test } from "bun:test"
 import * as DateTime from "effect/DateTime"
 import { SessionID } from "../../src/session/schema"
 import { EventV2 } from "../../src/v2/event"
+import { Modelv2 } from "../../src/v2/model"
 import { SessionEvent } from "../../src/v2/session-event"
 import { SessionMessageUpdater } from "../../src/v2/session-message-updater"
 
@@ -16,7 +17,11 @@ test("step snapshots carry over to assistant messages", () => {
       sessionID,
       timestamp: DateTime.makeUnsafe(1),
       agent: "build",
-      model: { id: "model", providerID: "provider" },
+      model: {
+        id: Modelv2.ID.make("model"),
+        providerID: Modelv2.ProviderID.make("provider"),
+        variant: Modelv2.VariantID.make("default"),
+      },
       snapshot: "before",
     },
   } satisfies SessionEvent.Event)
@@ -56,7 +61,11 @@ test("text ended populates assistant text content", () => {
       sessionID,
       timestamp: DateTime.makeUnsafe(1),
       agent: "build",
-      model: { id: "model", providerID: "provider" },
+      model: {
+        id: Modelv2.ID.make("model"),
+        providerID: Modelv2.ProviderID.make("provider"),
+        variant: Modelv2.VariantID.make("default"),
+      },
     },
   } satisfies SessionEvent.Event)
 
@@ -96,7 +105,11 @@ test("tool completion stores completed timestamp", () => {
       sessionID,
       timestamp: DateTime.makeUnsafe(1),
       agent: "build",
-      model: { id: "model", providerID: "provider" },
+      model: {
+        id: Modelv2.ID.make("model"),
+        providerID: Modelv2.ProviderID.make("provider"),
+        variant: Modelv2.VariantID.make("default"),
+      },
     },
   } satisfies SessionEvent.Event)