Resolve merge conflicts

packages/opencode/src/acp/README.md

@@ -44,6 +44,16 @@ opencode acp
 opencode acp --cwd /path/to/project
 ```
 
+### Question Tool Opt-In
+
+ACP excludes `QuestionTool` by default.
+
+```bash
+OPENCODE_ENABLE_QUESTION_TOOL=1 opencode acp
+```
+
+Enable this only for ACP clients that support interactive question prompts.
+
 ### Programmatic
 
 ```typescript

packages/opencode/src/acp/agent.ts

@@ -30,6 +30,7 @@ import {
 
 import { Log } from "../util/log"
 import { pathToFileURL } from "bun"
+import { Filesystem } from "../util/filesystem"
 import { ACPSessionManager } from "./session"
 import type { ACPConfig } from "./types"
 import { Provider } from "../provider/provider"
@@ -230,8 +231,7 @@ export namespace ACP {
                 const metadata = permission.metadata || {}
                 const filepath = typeof metadata["filepath"] === "string" ? metadata["filepath"] : ""
                 const diff = typeof metadata["diff"] === "string" ? metadata["diff"] : ""
-                const file = Bun.file(filepath)
-                const content = (await file.exists()) ? await file.text() : ""
+                const content = (await Filesystem.exists(filepath)) ? await Filesystem.readText(filepath) : ""
                 const newContent = getNewContent(content, diff)
 
                 if (newContent) {

packages/opencode/src/acp/session.ts

@@ -21,7 +21,6 @@ export class ACPSessionManager {
     const session = await this.sdk.session
       .create(
         {
-          title: `ACP Session ${crypto.randomUUID()}`,
           directory: cwd,
         },
         { throwOnError: true },

packages/opencode/src/agent/agent.ts

@@ -57,13 +57,13 @@ export namespace Agent {
     const cfg = await Config.get()
 
     const skillDirs = await Skill.dirs()
+    const whitelistedDirs = [Truncate.GLOB, ...skillDirs.map((dir) => path.join(dir, "*"))]
     const defaults = PermissionNext.fromConfig({
       "*": "allow",
       doom_loop: "ask",
       external_directory: {
         "*": "ask",
-        [Truncate.GLOB]: "allow",
-        ...Object.fromEntries(skillDirs.map((dir) => [path.join(dir, "*"), "allow"])),
+        ...Object.fromEntries(whitelistedDirs.map((dir) => [dir, "allow"])),
       },
       question: "deny",
       plan_enter: "deny",
@@ -228,7 +228,8 @@ export namespace Agent {
             codesearch: "allow",
             read: "allow",
             external_directory: {
-              [Truncate.GLOB]: "allow",
+              "*": "ask",
+              ...Object.fromEntries(whitelistedDirs.map((dir) => [dir, "allow"])),
             },
           }),
           user,

packages/opencode/src/auth/index.ts

@@ -2,6 +2,7 @@ import path from "path"
 import { Global } from "../global"
 import z from "zod"
 import { Telemetry } from "@kilocode/kilo-telemetry" // kilocode_change
+import { Filesystem } from "../util/filesystem"
 
 export const OAUTH_DUMMY_KEY = "opencode-oauth-dummy-key"
 
@@ -43,8 +44,7 @@ export namespace Auth {
   }
 
   export async function all(): Promise<Record<string, Info>> {
-    const file = Bun.file(filepath)
-    const data = await file.json().catch(() => ({}) as Record<string, unknown>)
+    const data = await Filesystem.readJson<Record<string, unknown>>(filepath).catch(() => ({}))
     return Object.entries(data).reduce(
       (acc, [key, value]) => {
         const parsed = Info.safeParse(value)
@@ -57,16 +57,14 @@ export namespace Auth {
   }
 
   export async function set(key: string, info: Info) {
-    const file = Bun.file(filepath)
     const data = await all()
-    await Bun.write(file, JSON.stringify({ ...data, [key]: info }, null, 2), { mode: 0o600 })
+    await Filesystem.writeJson(filepath, { ...data, [key]: info }, 0o600)
   }
 
   export async function remove(key: string) {
-    const file = Bun.file(filepath)
     const data = await all()
     delete data[key]
-    await Bun.write(file, JSON.stringify(data, null, 2), { mode: 0o600 })
+    await Filesystem.writeJson(filepath, data, 0o600)
 
     // kilocode_change start - Track logout and reset telemetry identity for Kilo
     if (key === "kilo") {

packages/opencode/src/bun/index.ts

@@ -66,14 +66,14 @@ export namespace BunProc {
     using _ = await Lock.write("bun-install")
 
     const mod = path.join(Global.Path.cache, "node_modules", pkg)
-    const pkgjson = Bun.file(path.join(Global.Path.cache, "package.json"))
-    const parsed = await pkgjson.json().catch(async () => {
-      const result = { dependencies: {} }
-      await Bun.write(pkgjson.name!, JSON.stringify(result, null, 2))
+    const pkgjsonPath = path.join(Global.Path.cache, "package.json")
+    const parsed = await Filesystem.readJson<{ dependencies: Record<string, string> }>(pkgjsonPath).catch(async () => {
+      const result = { dependencies: {} as Record<string, string> }
+      await Filesystem.writeJson(pkgjsonPath, result)
       return result
     })
-    const dependencies = parsed.dependencies ?? {}
-    if (!parsed.dependencies) parsed.dependencies = dependencies
+    if (!parsed.dependencies) parsed.dependencies = {} as Record<string, string>
+    const dependencies = parsed.dependencies
     const modExists = await Filesystem.exists(mod)
     const cachedVersion = dependencies[pkg]
 
@@ -123,15 +123,16 @@ export namespace BunProc {
     // This ensures subsequent starts use the cached version until explicitly updated
     let resolvedVersion = version
     if (version === "latest") {
-      const installedPkgJson = Bun.file(path.join(mod, "package.json"))
-      const installedPkg = await installedPkgJson.json().catch(() => null)
+      const installedPkg = await Filesystem.readJson<{ version?: string }>(path.join(mod, "package.json")).catch(
+        () => null,
+      )
       if (installedPkg?.version) {
         resolvedVersion = installedPkg.version
       }
     }
 
     parsed.dependencies[pkg] = resolvedVersion
-    await Bun.write(pkgjson.name!, JSON.stringify(parsed, null, 2))
+    await Filesystem.writeJson(pkgjsonPath, parsed)
     return mod
   }
 }

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

@@ -6,6 +6,7 @@ import { Agent } from "../../agent/agent"
 import { Provider } from "../../provider/provider"
 import path from "path"
 import fs from "fs/promises"
+import { Filesystem } from "../../util/filesystem"
 import matter from "gray-matter"
 import { Instance } from "../../project/instance"
 import { EOL } from "os"
@@ -202,8 +203,7 @@ const AgentCreateCommand = cmd({
 
         await fs.mkdir(targetPath, { recursive: true })
 
-        const file = Bun.file(filePath)
-        if (await file.exists()) {
+        if (await Filesystem.exists(filePath)) {
           if (isFullyNonInteractive) {
             console.error(`Error: Agent file already exists: ${filePath}`)
             process.exit(1)
@@ -212,7 +212,7 @@ const AgentCreateCommand = cmd({
           throw new UI.CancelledError()
         }
 
-        await Bun.write(filePath, content)
+        await Filesystem.write(filePath, content)
 
         if (isFullyNonInteractive) {
           console.log(filePath)

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

@@ -159,6 +159,38 @@ async function handlePluginAuth(plugin: { auth: PluginAuth }, provider: string):
   return false
 }
 
+/**
+ * Build a deduplicated list of plugin-registered auth providers that are not
+ * already present in models.dev, respecting enabled/disabled provider lists.
+ * Pure function with no side effects; safe to test without mocking.
+ */
+export function resolvePluginProviders(input: {
+  hooks: Hooks[]
+  existingProviders: Record<string, unknown>
+  disabled: Set<string>
+  enabled?: Set<string>
+  providerNames: Record<string, string | undefined>
+}): Array<{ id: string; name: string }> {
+  const seen = new Set<string>()
+  const result: Array<{ id: string; name: string }> = []
+
+  for (const hook of input.hooks) {
+    if (!hook.auth) continue
+    const id = hook.auth.provider
+    if (seen.has(id)) continue
+    seen.add(id)
+    if (Object.hasOwn(input.existingProviders, id)) continue
+    if (input.disabled.has(id)) continue
+    if (input.enabled && !input.enabled.has(id)) continue
+    result.push({
+      id,
+      name: input.providerNames[id] ?? id,
+    })
+  }
+
+  return result
+}
+
 export const AuthCommand = cmd({
   command: "auth",
   describe: "manage credentials",
@@ -287,6 +319,14 @@ export const AuthLoginCommand = cmd({
           vercel: 7,
         }
         // kilocode_change end
+
+        const pluginProviders = resolvePluginProviders({
+          hooks: await Plugin.list(),
+          existingProviders: providers,
+          disabled,
+          enabled,
+          providerNames: Object.fromEntries(Object.entries(config.provider ?? {}).map(([id, p]) => [id, p.name])),
+        })
         let provider = await prompts.autocomplete({
           message: "Select provider",
           maxItems: 8,
@@ -309,6 +349,11 @@ export const AuthLoginCommand = cmd({
                 }[x.id],
               })),
             ),
+            ...pluginProviders.map((x) => ({
+              label: x.name,
+              value: x.id,
+              hint: "plugin",
+            })),
             {
               value: "other",
               label: "Other",

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

@@ -18,7 +18,7 @@ export const ExportCommand = cmd({
   handler: async (args) => {
     await bootstrap(process.cwd(), async () => {
       let sessionID = args.sessionID
-      process.stderr.write(`Exporting session: ${sessionID ?? "latest"}`)
+      process.stderr.write(`Exporting session: ${sessionID ?? "latest"}\n`)
 
       if (!sessionID) {
         UI.empty()

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

@@ -1,5 +1,6 @@
 import path from "path"
 import { exec } from "child_process"
+import { Filesystem } from "../../util/filesystem"
 import * as prompts from "@clack/prompts"
 import { map, pipe, sortBy, values } from "remeda"
 import { Octokit } from "@octokit/rest"
@@ -173,6 +174,18 @@ export function extractResponseText(parts: MessageV2.Part[]): string | null {
   throw new Error("Failed to parse response: no parts returned")
 }
 
+/**
+ * Formats a PROMPT_TOO_LARGE error message with details about files in the prompt.
+ * Content is base64 encoded, so we calculate original size by multiplying by 0.75.
+ */
+export function formatPromptTooLargeError(files: { filename: string; content: string }[]): string {
+  const fileDetails =
+    files.length > 0
+      ? `\n\nFiles in prompt:\n${files.map((f) => `  - ${f.filename} (${((f.content.length * 0.75) / 1024).toFixed(0)} KB)`).join("\n")}`
+      : ""
+  return `PROMPT_TOO_LARGE: The prompt exceeds the model's context limit.${fileDetails}`
+}
+
 export const GithubCommand = cmd({
   command: "github",
   describe: "manage GitHub agent",
@@ -368,7 +381,7 @@ export const GithubInstallCommand = cmd({
 
             const envStr = providerEnvStr || kiloGatewayEnv ? `\n        env:${providerEnvStr}${kiloGatewayEnv}` : ""
 
-            await Bun.write(
+            await Filesystem.write(
               path.join(app.root, WORKFLOW_FILE),
               `name: kilo
 
@@ -549,8 +562,12 @@ export const GithubRunCommand = cmd({
           const branch = await checkoutNewBranch(branchPrefix)
           const head = (await $`git rev-parse HEAD`).stdout.toString().trim()
           const response = await chat(userPrompt, promptFiles)
-          const { dirty, uncommittedChanges } = await branchIsDirty(head)
-          if (dirty) {
+          const { dirty, uncommittedChanges, switched } = await branchIsDirty(head, branch)
+          if (switched) {
+            // Agent switched branches (likely created its own branch/PR)
+            console.log("Agent managed its own branch, skipping infrastructure push/PR")
+            console.log("Response:", response)
+          } else if (dirty) {
             const summary = await summarize(response)
             // workflow_dispatch has an actor for co-author attribution, schedule does not
             await pushToNewBranch(summary, branch, uncommittedChanges, isScheduleEvent)
@@ -561,7 +578,11 @@ export const GithubRunCommand = cmd({
               summary,
               `${response}\n\nTriggered by ${triggerType}${footer({ image: true })}`,
             )
-            console.log(`Created PR #${pr}`)
+            if (pr) {
+              console.log(`Created PR #${pr}`)
+            } else {
+              console.log("Skipped PR creation (no new commits)")
+            }
           } else {
             console.log("Response:", response)
           }
@@ -576,8 +597,11 @@ export const GithubRunCommand = cmd({
             const head = (await $`git rev-parse HEAD`).stdout.toString().trim()
             const dataPrompt = buildPromptDataForPR(prData)
             const response = await chat(`${userPrompt}\n\n${dataPrompt}`, promptFiles)
-            const { dirty, uncommittedChanges } = await branchIsDirty(head)
-            if (dirty) {
+            const { dirty, uncommittedChanges, switched } = await branchIsDirty(head, prData.headRefName)
+            if (switched) {
+              console.log("Agent managed its own branch, skipping infrastructure push")
+            }
+            if (dirty && !switched) {
               const summary = await summarize(response)
               await pushToLocalBranch(summary, uncommittedChanges)
             }
@@ -587,12 +611,15 @@ export const GithubRunCommand = cmd({
           }
           // Fork PR
           else {
-            await checkoutForkBranch(prData)
+            const forkBranch = await checkoutForkBranch(prData)
             const head = (await $`git rev-parse HEAD`).stdout.toString().trim()
             const dataPrompt = buildPromptDataForPR(prData)
             const response = await chat(`${userPrompt}\n\n${dataPrompt}`, promptFiles)
-            const { dirty, uncommittedChanges } = await branchIsDirty(head)
-            if (dirty) {
+            const { dirty, uncommittedChanges, switched } = await branchIsDirty(head, forkBranch)
+            if (switched) {
+              console.log("Agent managed its own branch, skipping infrastructure push")
+            }
+            if (dirty && !switched) {
               const summary = await summarize(response)
               await pushToForkBranch(summary, prData, uncommittedChanges)
             }
@@ -608,8 +635,13 @@ export const GithubRunCommand = cmd({
           const issueData = await fetchIssue()
           const dataPrompt = buildPromptDataForIssue(issueData)
           const response = await chat(`${userPrompt}\n\n${dataPrompt}`, promptFiles)
-          const { dirty, uncommittedChanges } = await branchIsDirty(head)
-          if (dirty) {
+          const { dirty, uncommittedChanges, switched } = await branchIsDirty(head, branch)
+          if (switched) {
+            // Agent switched branches (likely created its own branch/PR).
+            // Don't push the stale infrastructure branch — just comment.
+            await createComment(`${response}${footer({ image: true })}`)
+            await removeReaction(commentType)
+          } else if (dirty) {
             const summary = await summarize(response)
             await pushToNewBranch(summary, branch, uncommittedChanges, false)
             const pr = await createPR(
@@ -618,7 +650,11 @@ export const GithubRunCommand = cmd({
               summary,
               `${response}\n\nCloses #${issueId}${footer({ image: true })}`,
             )
-            await createComment(`Created PR #${pr}${footer({ image: true })}`)
+            if (pr) {
+              await createComment(`Created PR #${pr}${footer({ image: true })}`)
+            } else {
+              await createComment(`${response}${footer({ image: true })}`)
+            }
             await removeReaction(commentType)
           } else {
             await createComment(`${response}${footer({ image: true })}`)
@@ -811,6 +847,7 @@ export const GithubRunCommand = cmd({
             replacement,
           })
         }
+
         return { userPrompt: prompt, promptFiles: imgData }
       }
 
@@ -918,10 +955,15 @@ export const GithubRunCommand = cmd({
 
         // result should always be assistant just satisfying type checker
         if (result.info.role === "assistant" && result.info.error) {
-          console.error("Agent error:", result.info.error)
-          throw new Error(
-            `${result.info.error.name}: ${"message" in result.info.error ? result.info.error.message : ""}`,
-          )
+          const err = result.info.error
+          console.error("Agent error:", err)
+
+          if (err.name === "ContextOverflowError") {
+            throw new Error(formatPromptTooLargeError(files))
+          }
+
+          const errorMsg = err.data?.message || ""
+          throw new Error(`${err.name}: ${errorMsg}`)
         }
 
         const text = extractResponseText(result.parts)
@@ -947,10 +989,15 @@ export const GithubRunCommand = cmd({
         })
 
         if (summary.info.role === "assistant" && summary.info.error) {
-          console.error("Summary agent error:", summary.info.error)
-          throw new Error(
-            `${summary.info.error.name}: ${"message" in summary.info.error ? summary.info.error.message : ""}`,
-          )
+          const err = summary.info.error
+          console.error("Summary agent error:", err)
+
+          if (err.name === "ContextOverflowError") {
+            throw new Error(formatPromptTooLargeError(files))
+          }
+
+          const errorMsg = err.data?.message || ""
+          throw new Error(`${err.name}: ${errorMsg}`)
         }
 
         const summaryText = extractResponseText(summary.parts)
@@ -1056,6 +1103,7 @@ export const GithubRunCommand = cmd({
         await $`git remote add fork https://github.com/${pr.headRepository.nameWithOwner}.git`
         await $`git fetch fork --depth=${depth} ${remoteBranch}`
         await $`git checkout -b ${localBranch} fork/${remoteBranch}`
+        return localBranch
       }
 
       function generateBranchName(type: "issue" | "pr" | "schedule" | "dispatch") {
@@ -1113,23 +1161,44 @@ Co-authored-by: ${actor} <${actor}@users.noreply.github.com>"`
         await $`git push fork HEAD:${remoteBranch}`
       }
 
-      async function branchIsDirty(originalHead: string) {
+      async function branchIsDirty(originalHead: string, expectedBranch: string) {
         console.log("Checking if branch is dirty...")
+        // Detect if the agent switched branches during chat (e.g. created
+        // its own branch, committed, and possibly pushed/created a PR).
+        const current = (await $`git rev-parse --abbrev-ref HEAD`).stdout.toString().trim()
+        if (current !== expectedBranch) {
+          console.log(`Branch changed during chat: expected ${expectedBranch}, now on ${current}`)
+          return { dirty: true, uncommittedChanges: false, switched: true }
+        }
+
         const ret = await $`git status --porcelain`
         const status = ret.stdout.toString().trim()
         if (status.length > 0) {
-          return {
-            dirty: true,
-            uncommittedChanges: true,
-          }
+          return { dirty: true, uncommittedChanges: true, switched: false }
         }
-        const head = await $`git rev-parse HEAD`
+        const head = (await $`git rev-parse HEAD`).stdout.toString().trim()
         return {
-          dirty: head.stdout.toString().trim() !== originalHead,
+          dirty: head !== originalHead,
           uncommittedChanges: false,
+          switched: false,
         }
       }
 
+      // Verify commits exist between base ref and a branch using rev-list.
+      // Falls back to fetching from origin when local refs are missing
+      // (common in shallow clones from actions/checkout).
+      async function hasNewCommits(base: string, head: string) {
+        const result = await $`git rev-list --count ${base}..${head}`.nothrow()
+        if (result.exitCode !== 0) {
+          console.log(`rev-list failed, fetching origin/${base}...`)
+          await $`git fetch origin ${base} --depth=1`.nothrow()
+          const retry = await $`git rev-list --count origin/${base}..${head}`.nothrow()
+          if (retry.exitCode !== 0) return true // assume dirty if we can't tell
+          return parseInt(retry.stdout.toString().trim()) > 0
+        }
+        return parseInt(result.stdout.toString().trim()) > 0
+      }
+
       async function assertPermissions() {
         // Only called for non-schedule events, so actor is defined
         console.log(`Asserting permissions for user ${actor}...`)
@@ -1249,7 +1318,7 @@ Co-authored-by: ${actor} <${actor}@users.noreply.github.com>"`
         })
       }
 
-      async function createPR(base: string, branch: string, title: string, body: string) {
+      async function createPR(base: string, branch: string, title: string, body: string): Promise<number | null> {
         console.log("Creating pull request...")
 
         // Check if an open PR already exists for this head→base combination
@@ -1274,17 +1343,36 @@ Co-authored-by: ${actor} <${actor}@users.noreply.github.com>"`
           console.log(`Failed to check for existing PR: ${e}`)
         }
 
-        const pr = await withRetry(() =>
-          octoRest.rest.pulls.create({
-            owner,
-            repo,
-            head: branch,
-            base,
-            title,
-            body,
-          }),
-        )
-        return pr.data.number
+        // Verify there are commits between base and head before creating the PR.
+        // In shallow clones, the branch can appear dirty but share the same
+        // commit as the base, causing a 422 from GitHub.
+        if (!(await hasNewCommits(base, branch))) {
+          console.log(`No commits between ${base} and ${branch}, skipping PR creation`)
+          return null
+        }
+
+        try {
+          const pr = await withRetry(() =>
+            octoRest.rest.pulls.create({
+              owner,
+              repo,
+              head: branch,
+              base,
+              title,
+              body,
+            }),
+          )
+          return pr.data.number
+        } catch (e: unknown) {
+          // Handle "No commits between X and Y" validation error from GitHub.
+          // This can happen when the branch was pushed but has no new commits
+          // relative to the base (e.g. shallow clone edge cases).
+          if (e instanceof Error && e.message.includes("No commits between")) {
+            console.log(`GitHub rejected PR: ${e.message}`)
+            return null
+          }
+          throw e
+        }
       }
 
       async function withRetry<T>(fn: () => Promise<T>, retries = 1, delayMs = 5000): Promise<T> {

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

@@ -8,6 +8,7 @@ import { SessionTable, MessageTable, PartTable } from "../../session/session.sql
 import { Instance } from "../../project/instance"
 import { ShareNext } from "../../share/share-next"
 import { EOL } from "os"
+import { Filesystem } from "../../util/filesystem"
 
 /** Discriminated union returned by the ShareNext API (GET /api/share/:id/data) */
 export type ShareData =
@@ -116,8 +117,7 @@ export const ImportCommand = cmd({
 
         exportData = transformed
       } else {
-        const file = Bun.file(args.file)
-        exportData = await file.json().catch(() => {})
+        exportData = await Filesystem.readJson<NonNullable<typeof exportData>>(args.file).catch(() => undefined)
         if (!exportData) {
           process.stdout.write(`File not found: ${args.file}`)
           process.stdout.write(EOL)

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

@@ -13,6 +13,7 @@ import { Installation } from "../../installation"
 import path from "path"
 import { Global } from "../../global"
 import { modify, applyEdits } from "jsonc-parser"
+import { Filesystem } from "../../util/filesystem"
 import { Bus } from "../../bus"
 
 function getAuthStatusIcon(status: MCP.AuthStatus): string {
@@ -388,7 +389,7 @@ async function resolveConfigPath(baseDir: string, global = false) {
   }
 
   for (const candidate of candidates) {
-    if (await Bun.file(candidate).exists()) {
+    if (await Filesystem.exists(candidate)) {
       return candidate
     }
   }
@@ -398,11 +399,9 @@ async function resolveConfigPath(baseDir: string, global = false) {
 }
 
 async function addMcpToConfig(name: string, mcpConfig: Config.Mcp, configPath: string) {
-  const file = Bun.file(configPath)
-
   let text = "{}"
-  if (await file.exists()) {
-    text = await file.text()
+  if (await Filesystem.exists(configPath)) {
+    text = await Filesystem.readText(configPath)
   }
 
   // Use jsonc-parser to modify while preserving comments
@@ -411,7 +410,7 @@ async function addMcpToConfig(name: string, mcpConfig: Config.Mcp, configPath: s
   })
   const result = applyEdits(text, edits)
 
-  await Bun.write(configPath, result)
+  await Filesystem.write(configPath, result)
 
   return configPath
 }

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

@@ -6,6 +6,7 @@ import { cmd } from "./cmd"
 import { Flag } from "../../flag/flag"
 import { bootstrap } from "../bootstrap"
 import { EOL } from "os"
+import { Filesystem } from "../../util/filesystem"
 import { createOpencodeClient, type Message, type OpencodeClient, type ToolPart } from "@kilocode/sdk/v2"
 import { Server } from "../../server/server"
 import { Provider } from "../../provider/provider"
@@ -167,12 +168,17 @@ function websearch(info: ToolProps<typeof WebSearchTool>) {
 }
 
 function task(info: ToolProps<typeof TaskTool>) {
-  const agent = Locale.titlecase(info.input.subagent_type)
-  const desc = info.input.description
-  const started = info.part.state.status === "running"
+  const input = info.part.state.input
+  const status = info.part.state.status
+  const subagent =
+    typeof input.subagent_type === "string" && input.subagent_type.trim().length > 0 ? input.subagent_type : "unknown"
+  const agent = Locale.titlecase(subagent)
+  const desc =
+    typeof input.description === "string" && input.description.trim().length > 0 ? input.description : undefined
+  const icon = status === "error" ? "✗" : status === "running" ? "•" : "✓"
   const name = desc ?? `${agent} Task`
   inline({
-    icon: started ? "•" : "✓",
+    icon,
     title: name,
     description: desc ? `${agent} Agent` : undefined,
   })
@@ -324,19 +330,12 @@ export const RunCommand = cmd({
 
       for (const filePath of list) {
         const resolvedPath = path.resolve(process.cwd(), filePath)
-        const file = Bun.file(resolvedPath)
-        const stats = await file.stat().catch(() => {})
-        if (!stats) {
-          UI.error(`File not found: ${filePath}`)
-          process.exit(1)
-        }
-        if (!(await file.exists())) {
+        if (!(await Filesystem.exists(resolvedPath))) {
           UI.error(`File not found: ${filePath}`)
           process.exit(1)
         }
 
-        const stat = await file.stat()
-        const mime = stat.isDirectory() ? "application/x-directory" : "text/plain"
+        const mime = (await Filesystem.isDir(resolvedPath)) ? "application/x-directory" : "text/plain"
 
         files.push({
           type: "file",
@@ -466,9 +465,17 @@ export const RunCommand = cmd({
             const part = event.properties.part
             if (part.sessionID !== sessionID) continue
 
-            if (part.type === "tool" && part.state.status === "completed") {
+            if (part.type === "tool" && (part.state.status === "completed" || part.state.status === "error")) {
               if (emit("tool_use", { part })) continue
-              tool(part)
+              if (part.state.status === "completed") {
+                tool(part)
+                continue
+              }
+              inline({
+                icon: "✗",
+                title: `${part.tool} failed`,
+              })
+              UI.error(part.state.error)
             }
 
             if (

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

@@ -5,6 +5,7 @@ import { bootstrap } from "../bootstrap"
 import { UI } from "../ui"
 import { Locale } from "../../util/locale"
 import { Flag } from "../../flag/flag"
+import { Filesystem } from "../../util/filesystem"
 import { EOL } from "os"
 import path from "path"
 
@@ -17,18 +18,18 @@ function pagerCmd(): string[] {
   // user could have less installed via other options
   const lessOnPath = Bun.which("less")
   if (lessOnPath) {
-    if (Bun.file(lessOnPath).size) return [lessOnPath, ...lessOptions]
+    if (Filesystem.stat(lessOnPath)?.size) return [lessOnPath, ...lessOptions]
   }
 
   if (Flag.KILO_GIT_BASH_PATH) {
     const less = path.join(Flag.KILO_GIT_BASH_PATH, "..", "..", "usr", "bin", "less.exe")
-    if (Bun.file(less).size) return [less, ...lessOptions]
+    if (Filesystem.stat(less)?.size) return [less, ...lessOptions]
   }
 
   const git = Bun.which("git")
   if (git) {
     const less = path.join(git, "..", "..", "usr", "bin", "less.exe")
-    if (Bun.file(less).size) return [less, ...lessOptions]
+    if (Filesystem.stat(less)?.size) return [less, ...lessOptions]
   }
 
   // Fall back to Windows built-in more (via cmd.exe)
@@ -38,10 +39,34 @@ function pagerCmd(): string[] {
 export const SessionCommand = cmd({
   command: "session",
   describe: "manage sessions",
-  builder: (yargs: Argv) => yargs.command(SessionListCommand).demandCommand(),
+  builder: (yargs: Argv) => yargs.command(SessionListCommand).command(SessionDeleteCommand).demandCommand(),
   async handler() {},
 })
 
+export const SessionDeleteCommand = cmd({
+  command: "delete <sessionID>",
+  describe: "delete a session",
+  builder: (yargs: Argv) => {
+    return yargs.positional("sessionID", {
+      describe: "session ID to delete",
+      type: "string",
+      demandOption: true,
+    })
+  },
+  handler: async (args) => {
+    await bootstrap(process.cwd(), async () => {
+      try {
+        await Session.get(args.sessionID)
+      } catch {
+        UI.error(`Session not found: ${args.sessionID}`)
+        process.exit(1)
+      }
+      await Session.remove(args.sessionID)
+      UI.println(UI.Style.TEXT_SUCCESS_BOLD + `Session ${args.sessionID} deleted` + UI.Style.TEXT_NORMAL)
+    })
+  },
+})
+
 export const SessionListCommand = cmd({
   command: "list",
   describe: "list sessions",
@@ -61,26 +86,17 @@ export const SessionListCommand = cmd({
   },
   handler: async (args) => {
     await bootstrap(process.cwd(), async () => {
-      const sessions = []
-      for await (const session of Session.list()) {
-        if (!session.parentID) {
-          sessions.push(session)
-        }
-      }
+      const sessions = [...Session.list({ roots: true, limit: args.maxCount })]
 
-      sessions.sort((a, b) => b.time.updated - a.time.updated)
-
-      const limitedSessions = args.maxCount ? sessions.slice(0, args.maxCount) : sessions
-
-      if (limitedSessions.length === 0) {
+      if (sessions.length === 0) {
         return
       }
 
       let output: string
       if (args.format === "json") {
-        output = formatSessionJSON(limitedSessions)
+        output = formatSessionJSON(sessions)
       } else {
-        output = formatSessionTable(limitedSessions)
+        output = formatSessionTable(sessions)
       }
 
       const shouldPaginate = process.stdout.isTTY && !args.maxCount && args.format === "table"

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

@@ -1,9 +1,10 @@
 import path from "path"
 import { Global } from "@/global"
+import { Filesystem } from "@/util/filesystem"
 import { onMount } from "solid-js"
 import { createStore } from "solid-js/store"
 import { createSimpleContext } from "../../context/helper"
-import { appendFile } from "fs/promises"
+import { appendFile, writeFile } from "fs/promises"
 
 function calculateFrecency(entry?: { frequency: number; lastOpen: number }): number {
   if (!entry) return 0
@@ -17,9 +18,9 @@ const MAX_FRECENCY_ENTRIES = 1000
 export const { use: useFrecency, provider: FrecencyProvider } = createSimpleContext({
   name: "Frecency",
   init: () => {
-    const frecencyFile = Bun.file(path.join(Global.Path.state, "frecency.jsonl"))
+    const frecencyPath = path.join(Global.Path.state, "frecency.jsonl")
     onMount(async () => {
-      const text = await frecencyFile.text().catch(() => "")
+      const text = await Filesystem.readText(frecencyPath).catch(() => "")
       const lines = text
         .split("\n")
         .filter(Boolean)
@@ -53,7 +54,7 @@ export const { use: useFrecency, provider: FrecencyProvider } = createSimpleCont
 
       if (sorted.length > 0) {
         const content = sorted.map((entry) => JSON.stringify(entry)).join("\n") + "\n"
-        Bun.write(frecencyFile, content).catch(() => {})
+        writeFile(frecencyPath, content).catch(() => {})
       }
     })
 
@@ -68,7 +69,7 @@ export const { use: useFrecency, provider: FrecencyProvider } = createSimpleCont
         lastOpen: Date.now(),
       }
       setStore("data", absolutePath, newEntry)
-      appendFile(frecencyFile.name!, JSON.stringify({ path: absolutePath, ...newEntry }) + "\n").catch(() => {})
+      appendFile(frecencyPath, JSON.stringify({ path: absolutePath, ...newEntry }) + "\n").catch(() => {})
 
       if (Object.keys(store.data).length > MAX_FRECENCY_ENTRIES) {
         const sorted = Object.entries(store.data)
@@ -76,7 +77,7 @@ export const { use: useFrecency, provider: FrecencyProvider } = createSimpleCont
           .slice(0, MAX_FRECENCY_ENTRIES)
         setStore("data", Object.fromEntries(sorted))
         const content = sorted.map(([path, entry]) => JSON.stringify({ path, ...entry })).join("\n") + "\n"
-        Bun.write(frecencyFile, content).catch(() => {})
+        writeFile(frecencyPath, content).catch(() => {})
       }
     }
 

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

@@ -1,5 +1,6 @@
 import path from "path"
 import { Global } from "@/global"
+import { Filesystem } from "@/util/filesystem"
 import { onMount } from "solid-js"
 import { createStore, produce } from "solid-js/store"
 import { clone } from "remeda"
@@ -30,9 +31,9 @@ const MAX_HISTORY_ENTRIES = 50
 export const { use: usePromptHistory, provider: PromptHistoryProvider } = createSimpleContext({
   name: "PromptHistory",
   init: () => {
-    const historyFile = Bun.file(path.join(Global.Path.state, "prompt-history.jsonl"))
+    const historyPath = path.join(Global.Path.state, "prompt-history.jsonl")
     onMount(async () => {
-      const text = await historyFile.text().catch(() => "")
+      const text = await Filesystem.readText(historyPath).catch(() => "")
       const lines = text
         .split("\n")
         .filter(Boolean)
@@ -51,7 +52,7 @@ export const { use: usePromptHistory, provider: PromptHistoryProvider } = create
       // Rewrite file with only valid entries to self-heal corruption
       if (lines.length > 0) {
         const content = lines.map((line) => JSON.stringify(line)).join("\n") + "\n"
-        writeFile(historyFile.name!, content).catch(() => {})
+        writeFile(historyPath, content).catch(() => {})
       }
     })
 
@@ -97,11 +98,11 @@ export const { use: usePromptHistory, provider: PromptHistoryProvider } = create
 
         if (trimmed) {
           const content = store.history.map((line) => JSON.stringify(line)).join("\n") + "\n"
-          writeFile(historyFile.name!, content).catch(() => {})
+          writeFile(historyPath, content).catch(() => {})
           return
         }
 
-        appendFile(historyFile.name!, JSON.stringify(entry) + "\n").catch(() => {})
+        appendFile(historyPath, JSON.stringify(entry) + "\n").catch(() => {})
       },
     }
   },

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

@@ -1,6 +1,8 @@
 import { BoxRenderable, TextareaRenderable, MouseEvent, PasteEvent, t, dim, fg } from "@opentui/core"
 import { createEffect, createMemo, type JSX, onMount, createSignal, onCleanup, on, Show, Switch, Match } from "solid-js"
 import "opentui-spinner/solid"
+import path from "path"
+import { Filesystem } from "@/util/filesystem"
 import { useLocal } from "@tui/context/local"
 import { useTheme } from "@tui/context/theme"
 import { EmptyBorder } from "@tui/component/border"
@@ -696,7 +698,7 @@ export function Prompt(props: PromptProps) {
   async function pasteImage(file: { filename?: string; content: string; mime: string }) {
     const currentOffset = input.visualCursor.offset
     const extmarkStart = currentOffset
-    const count = store.prompt.parts.filter((x) => x.type === "file").length
+    const count = store.prompt.parts.filter((x) => x.type === "file" && x.mime.startsWith("image/")).length
     const virtualText = `[Image ${count + 1}]`
     const extmarkEnd = extmarkStart + virtualText.length
     const textToInsert = virtualText + " "
@@ -948,26 +950,26 @@ export function Prompt(props: PromptProps) {
                 const isUrl = /^(https?):\/\//.test(filepath)
                 if (!isUrl) {
                   try {
-                    const file = Bun.file(filepath)
+                    const mime = Filesystem.mimeType(filepath)
+                    const filename = path.basename(filepath)
                     // Handle SVG as raw text content, not as base64 image
-                    if (file.type === "image/svg+xml") {
+                    if (mime === "image/svg+xml") {
                       event.preventDefault()
-                      const content = await file.text().catch(() => {})
+                      const content = await Filesystem.readText(filepath).catch(() => {})
                       if (content) {
-                        pasteText(content, `[SVG: ${file.name ?? "image"}]`)
+                        pasteText(content, `[SVG: ${filename ?? "image"}]`)
                         return
                       }
                     }
-                    if (file.type.startsWith("image/")) {
+                    if (mime.startsWith("image/")) {
                       event.preventDefault()
-                      const content = await file
-                        .arrayBuffer()
+                      const content = await Filesystem.readArrayBuffer(filepath)
                         .then((buffer) => Buffer.from(buffer).toString("base64"))
                         .catch(() => {})
                       if (content) {
                         await pasteImage({
-                          filename: file.name,
-                          mime: file.type,
+                          filename,
+                          mime,
                           content,
                         })
                         return

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

@@ -1,5 +1,6 @@
 import path from "path"
 import { Global } from "@/global"
+import { Filesystem } from "@/util/filesystem"
 import { onMount } from "solid-js"
 import { createStore, produce } from "solid-js/store"
 import { clone } from "remeda"
@@ -18,9 +19,9 @@ const MAX_STASH_ENTRIES = 50
 export const { use: usePromptStash, provider: PromptStashProvider } = createSimpleContext({
   name: "PromptStash",
   init: () => {
-    const stashFile = Bun.file(path.join(Global.Path.state, "prompt-stash.jsonl"))
+    const stashPath = path.join(Global.Path.state, "prompt-stash.jsonl")
     onMount(async () => {
-      const text = await stashFile.text().catch(() => "")
+      const text = await Filesystem.readText(stashPath).catch(() => "")
       const lines = text
         .split("\n")
         .filter(Boolean)
@@ -39,7 +40,7 @@ export const { use: usePromptStash, provider: PromptStashProvider } = createSimp
       // Rewrite file with only valid entries to self-heal corruption
       if (lines.length > 0) {
         const content = lines.map((line) => JSON.stringify(line)).join("\n") + "\n"
-        writeFile(stashFile.name!, content).catch(() => {})
+        writeFile(stashPath, content).catch(() => {})
       }
     })
 
@@ -66,11 +67,11 @@ export const { use: usePromptStash, provider: PromptStashProvider } = createSimp
 
         if (trimmed) {
           const content = store.entries.map((line) => JSON.stringify(line)).join("\n") + "\n"
-          writeFile(stashFile.name!, content).catch(() => {})
+          writeFile(stashPath, content).catch(() => {})
           return
         }
 
-        appendFile(stashFile.name!, JSON.stringify(stash) + "\n").catch(() => {})
+        appendFile(stashPath, JSON.stringify(stash) + "\n").catch(() => {})
       },
       pop() {
         if (store.entries.length === 0) return undefined
@@ -82,7 +83,7 @@ export const { use: usePromptStash, provider: PromptStashProvider } = createSimp
         )
         const content =
           store.entries.length > 0 ? store.entries.map((line) => JSON.stringify(line)).join("\n") + "\n" : ""
-        writeFile(stashFile.name!, content).catch(() => {})
+        writeFile(stashPath, content).catch(() => {})
         return entry
       },
       remove(index: number) {
@@ -94,7 +95,7 @@ export const { use: usePromptStash, provider: PromptStashProvider } = createSimp
         )
         const content =
           store.entries.length > 0 ? store.entries.map((line) => JSON.stringify(line)).join("\n") + "\n" : ""
-        writeFile(stashFile.name!, content).catch(() => {})
+        writeFile(stashPath, content).catch(() => {})
       },
     }
   },

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

@@ -34,7 +34,6 @@ export const { use: useExit, provider: ExitProvider } = createSimpleContext({
         renderer.setTerminalTitle("")
         renderer.destroy()
         win32FlushInputBuffer()
-        await input.onExit?.()
         if (reason) {
           const formatted = FormatError(reason) ?? FormatUnknownError(reason)
           if (formatted) {
@@ -43,7 +42,7 @@ export const { use: useExit, provider: ExitProvider } = createSimpleContext({
         }
         const text = store.get()
         if (text) process.stdout.write(text + "\n")
-        process.exit(0)
+        await input.onExit?.()
       },
       {
         message: store,

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

@@ -1,4 +1,5 @@
 import { Global } from "@/global"
+import { Filesystem } from "@/util/filesystem"
 import { createSignal, type Setter } from "solid-js"
 import { createStore } from "solid-js/store"
 import { createSimpleContext } from "./helper"
@@ -9,10 +10,9 @@ export const { use: useKV, provider: KVProvider } = createSimpleContext({
   init: () => {
     const [ready, setReady] = createSignal(false)
     const [store, setStore] = createStore<Record<string, any>>()
-    const file = Bun.file(path.join(Global.Path.state, "kv.json"))
+    const filePath = path.join(Global.Path.state, "kv.json")
 
-    file
-      .json()
+    Filesystem.readJson(filePath)
       .then((x) => {
         setStore(x)
       })
@@ -44,7 +44,7 @@ export const { use: useKV, provider: KVProvider } = createSimpleContext({
       },
       set(key: string, value: any) {
         setStore(key, value)
-        Bun.write(file, JSON.stringify(store, null, 2))
+        Filesystem.writeJson(filePath, store)
       },
     }
     return result

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

@@ -12,6 +12,7 @@ import { Provider } from "@/provider/provider"
 import { useArgs } from "./args"
 import { useSDK } from "./sdk"
 import { RGBA } from "@opentui/core"
+import { Filesystem } from "@/util/filesystem"
 
 export const { use: useLocal, provider: LocalProvider } = createSimpleContext({
   name: "Local",
@@ -119,7 +120,7 @@ export const { use: useLocal, provider: LocalProvider } = createSimpleContext({
         variant: {},
       })
 
-      const file = Bun.file(path.join(Global.Path.state, "model.json"))
+      const filePath = path.join(Global.Path.state, "model.json")
       const state = {
         pending: false,
       }
@@ -130,19 +131,15 @@ export const { use: useLocal, provider: LocalProvider } = createSimpleContext({
           return
         }
         state.pending = false
-        Bun.write(
-          file,
-          JSON.stringify({
-            recent: modelStore.recent,
-            favorite: modelStore.favorite,
-            variant: modelStore.variant,
-          }),
-        )
+        Filesystem.writeJson(filePath, {
+          recent: modelStore.recent,
+          favorite: modelStore.favorite,
+          variant: modelStore.variant,
+        })
       }
 
-      file
-        .json()
-        .then((x) => {
+      Filesystem.readJson(filePath)
+        .then((x: any) => {
           if (Array.isArray(x.recent)) setModelStore("recent", x.recent)
           if (Array.isArray(x.favorite)) setModelStore("favorite", x.favorite)
           if (typeof x.variant === "object" && x.variant !== null) setModelStore("variant", x.variant)

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

@@ -3,6 +3,7 @@ import path from "path"
 import { createEffect, createMemo, onMount } from "solid-js"
 import { useSync } from "@tui/context/sync"
 import { createSimpleContext } from "./helper"
+import { Glob } from "../../../../util/glob"
 import aura from "./theme/aura.json" with { type: "json" }
 import ayu from "./theme/ayu.json" with { type: "json" }
 import catppuccin from "./theme/catppuccin.json" with { type: "json" }
@@ -393,7 +394,6 @@ export const { use: useTheme, provider: ThemeProvider } = createSimpleContext({
   },
 })
 
-const CUSTOM_THEME_GLOB = new Bun.Glob("themes/*.json")
 async function getCustomThemes() {
   const directories = [
     Global.Path.config,
@@ -407,14 +407,14 @@ async function getCustomThemes() {
 
   const result: Record<string, ThemeJson> = {}
   for (const dir of directories) {
-    for await (const item of CUSTOM_THEME_GLOB.scan({
-      absolute: true,
-      followSymlinks: true,
-      dot: true,
+    for (const item of await Glob.scan("themes/*.json", {
       cwd: dir,
+      absolute: true,
+      dot: true,
+      symlink: true,
     })) {
       const name = path.basename(item, ".json")
-      result[name] = await Bun.file(item).json()
+      result[name] = await Filesystem.readJson(item)
     }
   }
   return result

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

@@ -64,12 +64,16 @@ function EditBody(props: { request: PermissionRequest }) {
 
   return (
     <box flexDirection="column" gap={1}>
-      <box flexDirection="row" gap={1} paddingLeft={1}>
-        <text fg={theme.textMuted}>{"→"}</text>
-        <text fg={theme.textMuted}>Edit {normalizePath(filepath())}</text>
-      </box>
       <Show when={diff()}>
-        <scrollbox height="100%">
+        <scrollbox
+          height="100%"
+          verticalScrollbarOptions={{
+            trackOptions: {
+              backgroundColor: theme.background,
+              foregroundColor: theme.borderActive,
+            },
+          }}
+        >
           <diff
             diff={diff()}
             view={view()}
@@ -91,6 +95,11 @@ function EditBody(props: { request: PermissionRequest }) {
           />
         </scrollbox>
       </Show>
+      <Show when={!diff()}>
+        <box paddingLeft={1}>
+          <text fg={theme.textMuted}>No diff provided</text>
+        </box>
+      </Show>
     </box>
   )
 }
@@ -196,76 +205,233 @@ export function PermissionPrompt(props: { request: PermissionRequest }) {
       </Match>
       <Match when={store.stage === "permission"}>
         {(() => {
+          const info = () => {
+            const permission = props.request.permission
+            const data = input()
+
+            if (permission === "edit") {
+              const raw = props.request.metadata?.filepath
+              const filepath = typeof raw === "string" ? raw : ""
+              return {
+                icon: "→",
+                title: `Edit ${normalizePath(filepath)}`,
+                body: <EditBody request={props.request} />,
+              }
+            }
+
+            if (permission === "read") {
+              const raw = data.filePath
+              const filePath = typeof raw === "string" ? raw : ""
+              return {
+                icon: "→",
+                title: `Read ${normalizePath(filePath)}`,
+                body: (
+                  <Show when={filePath}>
+                    <box paddingLeft={1}>
+                      <text fg={theme.textMuted}>{"Path: " + normalizePath(filePath)}</text>
+                    </box>
+                  </Show>
+                ),
+              }
+            }
+
+            if (permission === "glob") {
+              const pattern = typeof data.pattern === "string" ? data.pattern : ""
+              return {
+                icon: "✱",
+                title: `Glob "${pattern}"`,
+                body: (
+                  <Show when={pattern}>
+                    <box paddingLeft={1}>
+                      <text fg={theme.textMuted}>{"Pattern: " + pattern}</text>
+                    </box>
+                  </Show>
+                ),
+              }
+            }
+
+            if (permission === "grep") {
+              const pattern = typeof data.pattern === "string" ? data.pattern : ""
+              return {
+                icon: "✱",
+                title: `Grep "${pattern}"`,
+                body: (
+                  <Show when={pattern}>
+                    <box paddingLeft={1}>
+                      <text fg={theme.textMuted}>{"Pattern: " + pattern}</text>
+                    </box>
+                  </Show>
+                ),
+              }
+            }
+
+            if (permission === "list") {
+              const raw = data.path
+              const dir = typeof raw === "string" ? raw : ""
+              return {
+                icon: "→",
+                title: `List ${normalizePath(dir)}`,
+                body: (
+                  <Show when={dir}>
+                    <box paddingLeft={1}>
+                      <text fg={theme.textMuted}>{"Path: " + normalizePath(dir)}</text>
+                    </box>
+                  </Show>
+                ),
+              }
+            }
+
+            if (permission === "bash") {
+              const title =
+                typeof data.description === "string" && data.description ? data.description : "Shell command"
+              const command = typeof data.command === "string" ? data.command : ""
+              return {
+                icon: "#",
+                title,
+                body: (
+                  <Show when={command}>
+                    <box paddingLeft={1}>
+                      <text fg={theme.text}>{"$ " + command}</text>
+                    </box>
+                  </Show>
+                ),
+              }
+            }
+
+            if (permission === "task") {
+              const type = typeof data.subagent_type === "string" ? data.subagent_type : "Unknown"
+              const desc = typeof data.description === "string" ? data.description : ""
+              return {
+                icon: "#",
+                title: `${Locale.titlecase(type)} Task`,
+                body: (
+                  <Show when={desc}>
+                    <box paddingLeft={1}>
+                      <text fg={theme.text}>{"◉ " + desc}</text>
+                    </box>
+                  </Show>
+                ),
+              }
+            }
+
+            if (permission === "webfetch") {
+              const url = typeof data.url === "string" ? data.url : ""
+              return {
+                icon: "%",
+                title: `WebFetch ${url}`,
+                body: (
+                  <Show when={url}>
+                    <box paddingLeft={1}>
+                      <text fg={theme.textMuted}>{"URL: " + url}</text>
+                    </box>
+                  </Show>
+                ),
+              }
+            }
+
+            if (permission === "websearch") {
+              const query = typeof data.query === "string" ? data.query : ""
+              return {
+                icon: "◈",
+                title: `Exa Web Search "${query}"`,
+                body: (
+                  <Show when={query}>
+                    <box paddingLeft={1}>
+                      <text fg={theme.textMuted}>{"Query: " + query}</text>
+                    </box>
+                  </Show>
+                ),
+              }
+            }
+
+            if (permission === "codesearch") {
+              const query = typeof data.query === "string" ? data.query : ""
+              return {
+                icon: "◇",
+                title: `Exa Code Search "${query}"`,
+                body: (
+                  <Show when={query}>
+                    <box paddingLeft={1}>
+                      <text fg={theme.textMuted}>{"Query: " + query}</text>
+                    </box>
+                  </Show>
+                ),
+              }
+            }
+
+            if (permission === "external_directory") {
+              const meta = props.request.metadata ?? {}
+              const parent = typeof meta["parentDir"] === "string" ? meta["parentDir"] : undefined
+              const filepath = typeof meta["filepath"] === "string" ? meta["filepath"] : undefined
+              const pattern = props.request.patterns?.[0]
+              const derived =
+                typeof pattern === "string" ? (pattern.includes("*") ? path.dirname(pattern) : pattern) : undefined
+
+              const raw = parent ?? filepath ?? derived
+              const dir = normalizePath(raw)
+              const patterns = (props.request.patterns ?? []).filter((p): p is string => typeof p === "string")
+
+              return {
+                icon: "←",
+                title: `Access external directory ${dir}`,
+                body: (
+                  <Show when={patterns.length > 0}>
+                    <box paddingLeft={1} gap={1}>
+                      <text fg={theme.textMuted}>Patterns</text>
+                      <box>
+                        <For each={patterns}>{(p) => <text fg={theme.text}>{"- " + p}</text>}</For>
+                      </box>
+                    </box>
+                  </Show>
+                ),
+              }
+            }
+
+            if (permission === "doom_loop") {
+              return {
+                icon: "⟳",
+                title: "Continue after repeated failures",
+                body: (
+                  <box paddingLeft={1}>
+                    <text fg={theme.textMuted}>This keeps the session running despite repeated failures.</text>
+                  </box>
+                ),
+              }
+            }
+
+            return {
+              icon: "⚙",
+              title: `Call tool ${permission}`,
+              body: (
+                <box paddingLeft={1}>
+                  <text fg={theme.textMuted}>{"Tool: " + permission}</text>
+                </box>
+              ),
+            }
+          }
+
+          const current = info()
+
+          const header = () => (
+            <box flexDirection="column" gap={0}>
+              <box flexDirection="row" gap={1} flexShrink={0}>
+                <text fg={theme.warning}>{"△"}</text>
+                <text fg={theme.text}>Permission required</text>
+              </box>
+              <box flexDirection="row" gap={1} paddingLeft={2} flexShrink={0}>
+                <text fg={theme.textMuted} flexShrink={0}>
+                  {current.icon}
+                </text>
+                <text fg={theme.text}>{current.title}</text>
+              </box>
+            </box>
+          )
+
           const body = (
             <Prompt
               title="Permission required"
-              body={
-                <Switch>
-                  <Match when={props.request.permission === "edit"}>
-                    <EditBody request={props.request} />
-                  </Match>
-                  <Match when={props.request.permission === "read"}>
-                    <TextBody icon="→" title={`Read ` + normalizePath(input().filePath as string)} />
-                  </Match>
-                  <Match when={props.request.permission === "glob"}>
-                    <TextBody icon="✱" title={`Glob "` + (input().pattern ?? "") + `"`} />
-                  </Match>
-                  <Match when={props.request.permission === "grep"}>
-                    <TextBody icon="✱" title={`Grep "` + (input().pattern ?? "") + `"`} />
-                  </Match>
-                  <Match when={props.request.permission === "list"}>
-                    <TextBody icon="→" title={`List ` + normalizePath(input().path as string)} />
-                  </Match>
-                  <Match when={props.request.permission === "bash"}>
-                    <TextBody
-                      icon="#"
-                      title={(input().description as string) ?? ""}
-                      description={("$ " + input().command) as string}
-                    />
-                  </Match>
-                  <Match when={props.request.permission === "task"}>
-                    <TextBody
-                      icon="#"
-                      title={`${Locale.titlecase((input().subagent_type as string) ?? "Unknown")} Task`}
-                      description={"◉ " + input().description}
-                    />
-                  </Match>
-                  <Match when={props.request.permission === "webfetch"}>
-                    <TextBody icon="%" title={`WebFetch ` + (input().url ?? "")} />
-                  </Match>
-                  <Match when={props.request.permission === "websearch"}>
-                    <TextBody icon="◈" title={`Exa Web Search "` + (input().query ?? "") + `"`} />
-                  </Match>
-                  <Match when={props.request.permission === "codesearch"}>
-                    <TextBody icon="◇" title={`Exa Code Search "` + (input().query ?? "") + `"`} />
-                  </Match>
-                  <Match when={props.request.permission === "external_directory"}>
-                    {(() => {
-                      const meta = props.request.metadata ?? {}
-                      const parent = typeof meta["parentDir"] === "string" ? meta["parentDir"] : undefined
-                      const filepath = typeof meta["filepath"] === "string" ? meta["filepath"] : undefined
-                      const pattern = props.request.patterns?.[0]
-                      const derived =
-                        typeof pattern === "string"
-                          ? pattern.includes("*")
-                            ? path.dirname(pattern)
-                            : pattern
-                          : undefined
-
-                      const raw = parent ?? filepath ?? derived
-                      const dir = normalizePath(raw)
-
-                      return <TextBody icon="←" title={`Access external directory ` + dir} />
-                    })()}
-                  </Match>
-                  <Match when={props.request.permission === "doom_loop"}>
-                    <TextBody icon="⟳" title="Continue after repeated failures" />
-                  </Match>
-                  <Match when={true}>
-                    <TextBody icon="⚙" title={`Call tool ` + props.request.permission} />
-                  </Match>
-                </Switch>
-              }
+              header={header()}
+              body={current.body}
               options={{ once: "Allow once", always: "Allow always", reject: "Reject" }}
               escapeKey="reject"
               fullscreen
@@ -375,6 +541,7 @@ function RejectPrompt(props: { onConfirm: (message: string) => void; onCancel: (
 
 function Prompt<const T extends Record<string, string>>(props: {
   title: string
+  header?: JSX.Element
   body: JSX.Element
   options: T
   escapeKey?: keyof T
@@ -448,10 +615,19 @@ function Prompt<const T extends Record<string, string>>(props: {
           })}
     >
       <box gap={1} paddingLeft={1} paddingRight={3} paddingTop={1} paddingBottom={1} flexGrow={1}>
-        <box flexDirection="row" gap={1} paddingLeft={1} flexShrink={0}>
-          <text fg={theme.warning}>{"△"}</text>
-          <text fg={theme.text}>{props.title}</text>
-        </box>
+        <Show
+          when={props.header}
+          fallback={
+            <box flexDirection="row" gap={1} paddingLeft={1} flexShrink={0}>
+              <text fg={theme.warning}>{"△"}</text>
+              <text fg={theme.text}>{props.title}</text>
+            </box>
+          }
+        >
+          <box paddingLeft={1} flexShrink={0}>
+            {props.header}
+          </box>
+        </Show>
         {props.body}
       </box>
       <box

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

@@ -80,7 +80,15 @@ export function Sidebar(props: { sessionID: string; overlay?: boolean }) {
         paddingRight={2}
         position={props.overlay ? "absolute" : "relative"}
       >
-        <scrollbox flexGrow={1}>
+        <scrollbox
+          flexGrow={1}
+          verticalScrollbarOptions={{
+            trackOptions: {
+              backgroundColor: theme.background,
+              foregroundColor: theme.borderActive,
+            },
+          }}
+        >
           <box flexShrink={0} gap={1} paddingRight={1}>
             <box paddingRight={1}>
               <text fg={theme.text}>

packages/opencode/src/cli/cmd/tui/thread.ts

@@ -3,10 +3,12 @@ import { tui } from "./app"
 import { Rpc } from "@/util/rpc"
 import { type rpc } from "./worker"
 import path from "path"
+import { fileURLToPath } from "url"
 import { UI } from "@/cli/ui"
 import { iife } from "@/util/iife"
 import { Log } from "@/util/log"
 import { withNetworkOptions, resolveNetworkOptions } from "@/cli/network"
+import { Filesystem } from "@/util/filesystem"
 import type { Event } from "@kilocode/sdk/v2"
 import type { EventSource } from "./context/sdk"
 import { win32DisableProcessedInput, win32InstallCtrlCGuard } from "./win32"
@@ -99,7 +101,7 @@ export const TuiThreadCommand = cmd({
       const distWorker = new URL("./cli/cmd/tui/worker.js", import.meta.url)
       const workerPath = await iife(async () => {
         if (typeof KILO_WORKER_PATH !== "undefined") return KILO_WORKER_PATH
-        if (await Bun.file(distWorker).exists()) return distWorker
+        if (await Filesystem.exists(fileURLToPath(distWorker))) return distWorker
         return localWorker
       })
       try {
@@ -191,5 +193,6 @@ export const TuiThreadCommand = cmd({
     } finally {
       unguard?.()
     }
+    process.exit(0)
   },
 })

packages/opencode/src/cli/cmd/tui/util/clipboard.ts

@@ -4,6 +4,7 @@ import clipboardy from "clipboardy"
 import { lazy } from "../../../../util/lazy.js"
 import { tmpdir } from "os"
 import path from "path"
+import { Filesystem } from "../../../../util/filesystem"
 
 /**
  * Writes text to clipboard via OSC 52 escape sequence.
@@ -34,9 +35,8 @@ export namespace Clipboard {
         await $`osascript -e 'set imageData to the clipboard as "PNGf"' -e 'set fileRef to open for access POSIX file "${tmpfile}" with write permission' -e 'set eof fileRef to 0' -e 'write imageData to fileRef' -e 'close access fileRef'`
           .nothrow()
           .quiet()
-        const file = Bun.file(tmpfile)
-        const buffer = await file.arrayBuffer()
-        return { data: Buffer.from(buffer).toString("base64"), mime: "image/png" }
+        const buffer = await Filesystem.readBytes(tmpfile)
+        return { data: buffer.toString("base64"), mime: "image/png" }
       } catch {
       } finally {
         await $`rm -f "${tmpfile}"`.nothrow().quiet()

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

@@ -3,6 +3,7 @@ import { rm } from "node:fs/promises"
 import { tmpdir } from "node:os"
 import { join } from "node:path"
 import { CliRenderer } from "@opentui/core"
+import { Filesystem } from "@/util/filesystem"
 
 export namespace Editor {
   export async function open(opts: { value: string; renderer: CliRenderer }): Promise<string | undefined> {
@@ -12,7 +13,7 @@ export namespace Editor {
     const filepath = join(tmpdir(), `${Date.now()}.md`)
     await using _ = defer(async () => rm(filepath, { force: true }))
 
-    await Bun.write(filepath, opts.value)
+    await Filesystem.write(filepath, opts.value)
     opts.renderer.suspend()
     opts.renderer.currentRenderBuffer.clear()
     const parts = editor.split(" ")
@@ -23,7 +24,7 @@ export namespace Editor {
       stderr: "inherit",
     })
     await proc.exited
-    const content = await Bun.file(filepath).text()
+    const content = await Filesystem.readText(filepath)
     opts.renderer.currentRenderBuffer.clear()
     opts.renderer.resume()
     opts.renderer.requestRender()

packages/opencode/src/cli/cmd/tui/worker.ts

@@ -137,7 +137,12 @@ export const rpc = {
   async shutdown() {
     Log.Default.info("worker shutting down")
     if (eventStream.abort) eventStream.abort.abort()
-    await Instance.disposeAll()
+    await Promise.race([
+      Instance.disposeAll(),
+      new Promise((resolve) => {
+        setTimeout(resolve, 5000)
+      }),
+    ])
     if (server) server.stop(true)
   },
 }

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

@@ -7,6 +7,7 @@ import { $ } from "bun"
 import fs from "fs/promises"
 import path from "path"
 import os from "os"
+import { Filesystem } from "../../util/filesystem"
 
 interface UninstallArgs {
   keepConfig: boolean
@@ -268,9 +269,7 @@ async function getShellConfigFile(): Promise<string | null> {
       .catch(() => false)
     if (!exists) continue
 
-    const content = await Bun.file(file)
-      .text()
-      .catch(() => "")
+    const content = await Filesystem.readText(file).catch(() => "")
     // kilocode_change start - detect both opencode and kilo markers
     if (
       content.includes("# opencode") ||
@@ -287,7 +286,7 @@ async function getShellConfigFile(): Promise<string | null> {
 }
 
 async function cleanShellConfig(file: string) {
-  const content = await Bun.file(file).text()
+  const content = await Filesystem.readText(file)
   const lines = content.split("\n")
 
   const filtered: string[] = []
@@ -325,7 +324,7 @@ async function cleanShellConfig(file: string) {
   }
 
   const output = filtered.join("\n") + "\n"
-  await Bun.write(file, output)
+  await Filesystem.write(file, output)
 }
 
 async function getDirectorySize(dir: string): Promise<number> {

packages/opencode/src/cli/ui.ts

@@ -106,6 +106,9 @@ export namespace UI {
   }
 
   export function error(message: string) {
+    if (message.startsWith("Error: ")) {
+      message = message.slice("Error: ".length)
+    }
     println(Style.TEXT_DANGER_BOLD + "Error: " + Style.TEXT_NORMAL + message)
   }
 

packages/opencode/src/config/config.ts

@@ -28,6 +28,7 @@ import { constants, existsSync } from "fs"
 import { Bus } from "@/bus"
 import { GlobalBus } from "@/bus/global"
 import { Event } from "../server/event"
+import { Glob } from "../util/glob"
 import { PackageRegistry } from "@/bun/registry"
 import { proxied } from "@/util/proxied"
 import { iife } from "@/util/iife"
@@ -188,7 +189,13 @@ export namespace Config {
         const remoteConfig = wellknown.config ?? {}
         // Add $schema to prevent load() from trying to write back to a non-existent file
         if (!remoteConfig.$schema) remoteConfig.$schema = "https://kilo.ai/config.json" // kilocode_change
-        result = merge(result, await load(JSON.stringify(remoteConfig), `${key}/.well-known/opencode`))
+        result = merge(
+          result,
+          await load(JSON.stringify(remoteConfig), {
+            dir: path.dirname(`${key}/.well-known/opencode`),
+            source: `${key}/.well-known/opencode`,
+          }),
+        )
         log.debug("loaded remote config from well-known", { url: key })
       }
     }
@@ -276,8 +283,14 @@ export namespace Config {
     }
 
     // Inline config content overrides all non-managed config sources.
-    if (Flag.KILO_CONFIG_CONTENT) {
-      result = merge(result, JSON.parse(Flag.KILO_CONFIG_CONTENT))
+    if (process.env.KILO_CONFIG_CONTENT) {
+      result = merge(
+        result,
+        await load(process.env.KILO_CONFIG_CONTENT, {
+          dir: Instance.directory,
+          source: "KILO_CONFIG_CONTENT",
+        }),
+      )
       log.debug("loaded custom config from KILO_CONFIG_CONTENT")
     }
 
@@ -354,19 +367,20 @@ export namespace Config {
     const pkg = path.join(dir, "package.json")
     const targetVersion = Installation.isLocal() ? "*" : Installation.VERSION
 
-    const json = await Bun.file(pkg)
-      .json()
-      .catch(() => ({}))
+    const json = await Filesystem.readJson<{ dependencies?: Record<string, string> }>(pkg).catch(() => ({
+      dependencies: {},
+    }))
     json.dependencies = {
       ...json.dependencies,
       "@opencode-ai/plugin": targetVersion,
     }
-    await Bun.write(pkg, JSON.stringify(json, null, 2))
+    await Filesystem.writeJson(pkg, json)
     await new Promise((resolve) => setTimeout(resolve, 3000))
 
     const gitignore = path.join(dir, ".gitignore")
-    const hasGitIgnore = await Bun.file(gitignore).exists()
-    if (!hasGitIgnore) await Bun.write(gitignore, ["node_modules", "package.json", "bun.lock", ".gitignore"].join("\n"))
+    const hasGitIgnore = await Filesystem.exists(gitignore)
+    if (!hasGitIgnore)
+      await Filesystem.write(gitignore, ["node_modules", "package.json", "bun.lock", ".gitignore"].join("\n"))
 
     // Install any additional dependencies defined in the package.json
     // This allows local plugins and custom tools to use external packages
@@ -402,11 +416,10 @@ export namespace Config {
     if (!existsSync(nodeModules)) return true
 
     const pkg = path.join(dir, "package.json")
-    const pkgFile = Bun.file(pkg)
-    const pkgExists = await pkgFile.exists()
+    const pkgExists = await Filesystem.exists(pkg)
     if (!pkgExists) return true
 
-    const parsed = await pkgFile.json().catch(() => null)
+    const parsed = await Filesystem.readJson<{ dependencies?: Record<string, string> }>(pkg).catch(() => null)
     const dependencies = parsed?.dependencies ?? {}
     const depVersion = dependencies["@opencode-ai/plugin"]
     if (!depVersion) return true
@@ -438,14 +451,13 @@ export namespace Config {
     return ext.length ? file.slice(0, -ext.length) : file
   }
 
-  const COMMAND_GLOB = new Bun.Glob("{command,commands}/**/*.md")
   async function loadCommand(dir: string) {
     const result: Record<string, Command> = {}
-    for await (const item of COMMAND_GLOB.scan({
-      absolute: true,
-      followSymlinks: true,
-      dot: true,
+    for (const item of await Glob.scan("{command,commands}/**/*.md", {
       cwd: dir,
+      absolute: true,
+      dot: true,
+      symlink: true,
     })) {
       const md = await ConfigMarkdown.parse(item).catch(async (err) => {
         const message = ConfigMarkdown.FrontmatterError.isInstance(err)
@@ -477,15 +489,14 @@ export namespace Config {
     return result
   }
 
-  const AGENT_GLOB = new Bun.Glob("{agent,agents}/**/*.md")
   async function loadAgent(dir: string) {
     const result: Record<string, Agent> = {}
 
-    for await (const item of AGENT_GLOB.scan({
-      absolute: true,
-      followSymlinks: true,
-      dot: true,
+    for (const item of await Glob.scan("{agent,agents}/**/*.md", {
       cwd: dir,
+      absolute: true,
+      dot: true,
+      symlink: true,
     })) {
       const md = await ConfigMarkdown.parse(item).catch(async (err) => {
         const message = ConfigMarkdown.FrontmatterError.isInstance(err)
@@ -517,14 +528,13 @@ export namespace Config {
     return result
   }
 
-  const MODE_GLOB = new Bun.Glob("{mode,modes}/*.md")
   async function loadMode(dir: string) {
     const result: Record<string, Agent> = {}
-    for await (const item of MODE_GLOB.scan({
-      absolute: true,
-      followSymlinks: true,
-      dot: true,
+    for (const item of await Glob.scan("{mode,modes}/*.md", {
       cwd: dir,
+      absolute: true,
+      dot: true,
+      symlink: true,
     })) {
       const md = await ConfigMarkdown.parse(item).catch(async (err) => {
         const message = ConfigMarkdown.FrontmatterError.isInstance(err)
@@ -554,15 +564,14 @@ export namespace Config {
     return result
   }
 
-  const PLUGIN_GLOB = new Bun.Glob("{plugin,plugins}/*.{ts,js}")
   async function loadPlugin(dir: string) {
     const plugins: string[] = []
 
-    for await (const item of PLUGIN_GLOB.scan({
-      absolute: true,
-      followSymlinks: true,
-      dot: true,
+    for (const item of await Glob.scan("{plugin,plugins}/*.{ts,js}", {
       cwd: dir,
+      absolute: true,
+      dot: true,
+      symlink: true,
     })) {
       plugins.push(pathToFileURL(item).href)
     }
@@ -1324,7 +1333,7 @@ export namespace Config {
           if (provider && model) result.model = `${provider}/${model}`
           result["$schema"] = "https://kilo.ai/config.json" // kilocode_change
           result = mergeDeep(result, rest)
-          await Bun.write(path.join(Global.Path.config, "config.json"), JSON.stringify(result, null, 2))
+          await Filesystem.writeJson(path.join(Global.Path.config, "config.json"), result)
           await fs.unlink(legacy)
         })
         .catch(() => {})
@@ -1335,31 +1344,32 @@ export namespace Config {
 
   async function loadFile(filepath: string): Promise<Info> {
     log.info("loading", { path: filepath })
-    let text = await Bun.file(filepath)
-      .text()
-      .catch((err) => {
-        if (err.code === "ENOENT") return
-        throw new JsonError({ path: filepath }, { cause: err })
-      })
+    let text = await Filesystem.readText(filepath).catch((err: any) => {
+      if (err.code === "ENOENT") return
+      throw new JsonError({ path: filepath }, { cause: err })
+    })
     if (!text) return {}
-    return load(text, filepath)
+    return load(text, { path: filepath })
   }
 
-  async function load(text: string, configFilepath: string) {
+  async function load(text: string, options: { path: string } | { dir: string; source: string }) {
     const original = text
+    const configDir = "path" in options ? path.dirname(options.path) : options.dir
+    const source = "path" in options ? options.path : options.source
+    const isFile = "path" in options
+
     text = text.replace(/\{env:([^}]+)\}/g, (_, varName) => {
       return process.env[varName] || ""
     })
 
     const fileMatches = text.match(/\{file:[^}]+\}/g)
     if (fileMatches) {
-      const configDir = path.dirname(configFilepath)
       const lines = text.split("\n")
 
       for (const match of fileMatches) {
         const lineIndex = lines.findIndex((line) => line.includes(match))
         if (lineIndex !== -1 && lines[lineIndex].trim().startsWith("//")) {
-          continue // Skip if line is commented
+          continue
         }
         let filePath = match.replace(/^\{file:/, "").replace(/\}$/, "")
         if (filePath.startsWith("~/")) {
@@ -1374,16 +1384,15 @@ export namespace Config {
               if (error.code === "ENOENT") {
                 throw new InvalidError(
                   {
-                    path: configFilepath,
+                    path: source,
                     message: errMsg + ` ${resolvedPath} does not exist`,
                   },
                   { cause: error },
                 )
               }
-              throw new InvalidError({ path: configFilepath, message: errMsg }, { cause: error })
+              throw new InvalidError({ path: source, message: errMsg }, { cause: error })
             })
         ).trim()
-        // escape newlines/quotes, strip outer quotes
         text = text.replace(match, () => JSON.stringify(fileContent).slice(1, -1))
       }
     }
@@ -1407,25 +1416,24 @@ export namespace Config {
         .join("\n")
 
       throw new JsonError({
-        path: configFilepath,
+        path: source,
         message: `\n--- JSONC Input ---\n${text}\n--- Errors ---\n${errorDetails}\n--- End ---`,
       })
     }
 
     const parsed = Info.safeParse(data)
     if (parsed.success) {
-      if (!parsed.data.$schema) {
+      if (!parsed.data.$schema && isFile) {
         parsed.data.$schema = "https://kilo.ai/config.json" // kilocode_change
-        // Write the $schema to the original text to preserve variables like {env:VAR}
         const updated = original.replace(/^\s*\{/, '{\n  "$schema": "https://kilo.ai/config.json",') // kilocode_change
-        await Bun.write(configFilepath, updated).catch(() => {})
+        await Bun.write(options.path, updated).catch(() => {})
       }
       const data = parsed.data
-      if (data.plugin) {
+      if (data.plugin && isFile) {
         for (let i = 0; i < data.plugin.length; i++) {
           const plugin = data.plugin[i]
           try {
-            data.plugin[i] = import.meta.resolve!(plugin, configFilepath)
+            data.plugin[i] = import.meta.resolve!(plugin, options.path)
           } catch (err) {}
         }
       }
@@ -1433,7 +1441,7 @@ export namespace Config {
     }
 
     throw new InvalidError({
-      path: configFilepath,
+      path: source,
       issues: parsed.error.issues,
     })
   }
@@ -1474,7 +1482,7 @@ export namespace Config {
   export async function update(config: Info) {
     const filepath = path.join(Instance.directory, "config.json")
     const existing = await loadFile(filepath)
-    await Bun.write(filepath, JSON.stringify(mergeDeep(existing, config), null, 2))
+    await Filesystem.writeJson(filepath, mergeDeep(existing, config))
     await Instance.dispose()
   }
 
@@ -1545,24 +1553,22 @@ export namespace Config {
 
   export async function updateGlobal(config: Info) {
     const filepath = globalConfigFile()
-    const before = await Bun.file(filepath)
-      .text()
-      .catch((err) => {
-        if (err.code === "ENOENT") return "{}"
-        throw new JsonError({ path: filepath }, { cause: err })
-      })
+    const before = await Filesystem.readText(filepath).catch((err: any) => {
+      if (err.code === "ENOENT") return "{}"
+      throw new JsonError({ path: filepath }, { cause: err })
+    })
 
     const next = await (async () => {
       if (!filepath.endsWith(".jsonc")) {
         const existing = parseConfig(before, filepath)
         const merged = mergeDeep(existing, config)
-        await Bun.write(filepath, JSON.stringify(merged, null, 2))
+        await Filesystem.writeJson(filepath, merged)
         return merged
       }
 
       const updated = patchJsonc(before, config)
       const merged = parseConfig(updated, filepath)
-      await Bun.write(filepath, updated)
+      await Filesystem.write(filepath, updated)
       return merged
     })()
 

packages/opencode/src/config/markdown.ts

@@ -1,6 +1,7 @@
 import { NamedError } from "@opencode-ai/util/error"
 import matter from "gray-matter"
 import { z } from "zod"
+import { Filesystem } from "../util/filesystem"
 
 export namespace ConfigMarkdown {
   export const FILE_REGEX = /(?<![\w`])@(\.?[^\s`,.]*(?:\.[^\s`,.]+)*)/g
@@ -68,7 +69,7 @@ export namespace ConfigMarkdown {
   }
 
   export async function parse(filePath: string) {
-    const template = await Bun.file(filePath).text()
+    const template = await Filesystem.readText(filePath)
 
     try {
       const md = matter(template)

packages/opencode/src/file/ignore.ts

@@ -1,4 +1,5 @@
 import { sep } from "node:path"
+import { Glob } from "../util/glob"
 
 export namespace FileIgnore {
   const FOLDERS = new Set([
@@ -53,19 +54,17 @@ export namespace FileIgnore {
     "**/.nyc_output/**",
   ]
 
-  const FILE_GLOBS = FILES.map((p) => new Bun.Glob(p))
-
   export const PATTERNS = [...FILES, ...FOLDERS]
 
   export function match(
     filepath: string,
     opts?: {
-      extra?: Bun.Glob[]
-      whitelist?: Bun.Glob[]
+      extra?: string[]
+      whitelist?: string[]
     },
   ) {
-    for (const glob of opts?.whitelist || []) {
-      if (glob.match(filepath)) return false
+    for (const pattern of opts?.whitelist || []) {
+      if (Glob.match(pattern, filepath)) return false
     }
 
     const parts = filepath.split(sep)
@@ -74,8 +73,8 @@ export namespace FileIgnore {
     }
 
     const extra = opts?.extra || []
-    for (const glob of [...FILE_GLOBS, ...extra]) {
-      if (glob.match(filepath)) return true
+    for (const pattern of [...FILES, ...extra]) {
+      if (Glob.match(pattern, filepath)) return true
     }
 
     return false

packages/opencode/src/file/index.ts

@@ -1,7 +1,6 @@
 import { BusEvent } from "@/bus/bus-event"
 import z from "zod"
 import { $ } from "bun"
-import type { BunFile } from "bun"
 import { formatPatch, structuredPatch } from "diff"
 import path from "path"
 import fs from "fs"
@@ -167,7 +166,6 @@ export namespace File {
     "efi",
     "rom",
     "com",
-    "bat",
     "cmd",
     "ps1",
     "sh",
@@ -204,11 +202,77 @@ export namespace File {
     "x3f",
   ])
 
+  const textExtensions = new Set([
+    "ts",
+    "tsx",
+    "mts",
+    "cts",
+    "mtsx",
+    "ctsx",
+    "js",
+    "jsx",
+    "mjs",
+    "cjs",
+    "sh",
+    "bash",
+    "zsh",
+    "fish",
+    "ps1",
+    "psm1",
+    "cmd",
+    "bat",
+    "json",
+    "jsonc",
+    "json5",
+    "yaml",
+    "yml",
+    "toml",
+    "md",
+    "mdx",
+    "txt",
+    "xml",
+    "html",
+    "htm",
+    "css",
+    "scss",
+    "sass",
+    "less",
+    "graphql",
+    "gql",
+    "sql",
+    "ini",
+    "cfg",
+    "conf",
+    "env",
+  ])
+
+  const textNames = new Set([
+    "dockerfile",
+    "makefile",
+    ".gitignore",
+    ".gitattributes",
+    ".editorconfig",
+    ".npmrc",
+    ".nvmrc",
+    ".prettierrc",
+    ".eslintrc",
+  ])
+
   function isImageByExtension(filepath: string): boolean {
     const ext = path.extname(filepath).toLowerCase().slice(1)
     return imageExtensions.has(ext)
   }
 
+  function isTextByExtension(filepath: string): boolean {
+    const ext = path.extname(filepath).toLowerCase().slice(1)
+    return textExtensions.has(ext)
+  }
+
+  function isTextByName(filepath: string): boolean {
+    const name = path.basename(filepath).toLowerCase()
+    return textNames.has(name)
+  }
+
   function getImageMimeType(filepath: string): string {
     const ext = path.extname(filepath).toLowerCase().slice(1)
     const mimeTypes: Record<string, string> = {
@@ -241,8 +305,8 @@ export namespace File {
     return mimeType.startsWith("image/")
   }
 
-  async function shouldEncode(file: BunFile): Promise<boolean> {
-    const type = file.type?.toLowerCase()
+  async function shouldEncode(mimeType: string): Promise<boolean> {
+    const type = mimeType.toLowerCase()
     log.info("shouldEncode", { type })
     if (!type) return false
 
@@ -385,7 +449,7 @@ export namespace File {
       const untrackedFiles = untrackedOutput.trim().split("\n")
       for (const filepath of untrackedFiles) {
         try {
-          const content = await Bun.file(path.join(Instance.directory, filepath)).text()
+          const content = await Filesystem.readText(path.join(Instance.directory, filepath))
           const lines = content.split("\n").length
           changedFiles.push({
             path: filepath,
@@ -418,10 +482,13 @@ export namespace File {
       }
     }
 
-    return changedFiles.map((x) => ({
-      ...x,
-      path: path.relative(Instance.directory, x.path),
-    }))
+    return changedFiles.map((x) => {
+      const full = path.isAbsolute(x.path) ? x.path : path.join(Instance.directory, x.path)
+      return {
+        ...x,
+        path: path.relative(Instance.directory, full),
+      }
+    })
   }
 
   export async function read(file: string): Promise<Content> {
@@ -437,43 +504,39 @@ export namespace File {
 
     // Fast path: check extension before any filesystem operations
     if (isImageByExtension(file)) {
-      const bunFile = Bun.file(full)
-      if (await bunFile.exists()) {
-        const buffer = await bunFile.arrayBuffer().catch(() => new ArrayBuffer(0))
-        const content = Buffer.from(buffer).toString("base64")
+      if (await Filesystem.exists(full)) {
+        const buffer = await Filesystem.readBytes(full).catch(() => Buffer.from([]))
+        const content = buffer.toString("base64")
         const mimeType = getImageMimeType(file)
         return { type: "text", content, mimeType, encoding: "base64" }
       }
       return { type: "text", content: "" }
     }
 
-    if (isBinaryByExtension(file)) {
+    const text = isTextByExtension(file) || isTextByName(file)
+
+    if (isBinaryByExtension(file) && !text) {
       return { type: "binary", content: "" }
     }
 
-    const bunFile = Bun.file(full)
-
-    if (!(await bunFile.exists())) {
+    if (!(await Filesystem.exists(full))) {
       return { type: "text", content: "" }
     }
 
-    const encode = await shouldEncode(bunFile)
-    const mimeType = bunFile.type || "application/octet-stream"
+    const mimeType = Filesystem.mimeType(full)
+    const encode = text ? false : await shouldEncode(mimeType)
 
     if (encode && !isImage(mimeType)) {
       return { type: "binary", content: "", mimeType }
     }
 
     if (encode) {
-      const buffer = await bunFile.arrayBuffer().catch(() => new ArrayBuffer(0))
-      const content = Buffer.from(buffer).toString("base64")
+      const buffer = await Filesystem.readBytes(full).catch(() => Buffer.from([]))
+      const content = buffer.toString("base64")
       return { type: "text", content, mimeType, encoding: "base64" }
     }
 
-    const content = await bunFile
-      .text()
-      .catch(() => "")
-      .then((x) => x.trim())
+    const content = (await Filesystem.readText(full).catch(() => "")).trim()
 
     if (project.vcs === "git") {
       let diff = await $`git diff ${file}`.cwd(Instance.directory).quiet().nothrow().text()
@@ -497,13 +560,13 @@ export namespace File {
     let ignored = (_: string) => false
     if (project.vcs === "git") {
       const ig = ignore()
-      const gitignore = Bun.file(path.join(Instance.worktree, ".gitignore"))
-      if (await gitignore.exists()) {
-        ig.add(await gitignore.text())
+      const gitignorePath = path.join(Instance.worktree, ".gitignore")
+      if (await Filesystem.exists(gitignorePath)) {
+        ig.add(await Filesystem.readText(gitignorePath))
       }
-      const ignoreFile = Bun.file(path.join(Instance.worktree, ".ignore"))
-      if (await ignoreFile.exists()) {
-        ig.add(await ignoreFile.text())
+      const ignorePath = path.join(Instance.worktree, ".ignore")
+      if (await Filesystem.exists(ignorePath)) {
+        ig.add(await Filesystem.readText(ignorePath))
       }
       ignored = ig.ignores.bind(ig)
     }

packages/opencode/src/file/ripgrep.ts

@@ -6,6 +6,7 @@ import z from "zod"
 import { NamedError } from "@opencode-ai/util/error"
 import { lazy } from "../util/lazy"
 import { $ } from "bun"
+import { Filesystem } from "../util/filesystem"
 
 import { ZipReader, BlobReader, BlobWriter } from "@zip.js/zip.js"
 import { Log } from "@/util/log"
@@ -131,8 +132,7 @@ export namespace Ripgrep {
     }
     const filepath = path.join(Global.Path.bin, "rg" + (process.platform === "win32" ? ".exe" : ""))
 
-    const file = Bun.file(filepath)
-    if (!(await file.exists())) {
+    if (!(await Filesystem.exists(filepath))) {
       const platformKey = `${process.arch}-${process.platform}` as keyof typeof PLATFORM
       const config = PLATFORM[platformKey]
       if (!config) throw new UnsupportedPlatformError({ platform: platformKey })
@@ -144,9 +144,9 @@ export namespace Ripgrep {
       const response = await fetch(url)
       if (!response.ok) throw new DownloadFailedError({ url, status: response.status })
 
-      const buffer = await response.arrayBuffer()
+      const arrayBuffer = await response.arrayBuffer()
       const archivePath = path.join(Global.Path.bin, filename)
-      await Bun.write(archivePath, buffer)
+      await Filesystem.write(archivePath, Buffer.from(arrayBuffer))
       if (config.extension === "tar.gz") {
         const args = ["tar", "-xzf", archivePath, "--strip-components=1"]
 
@@ -166,7 +166,7 @@ export namespace Ripgrep {
           })
       }
       if (config.extension === "zip") {
-        const zipFileReader = new ZipReader(new BlobReader(new Blob([await Bun.file(archivePath).arrayBuffer()])))
+        const zipFileReader = new ZipReader(new BlobReader(new Blob([arrayBuffer])))
         const entries = await zipFileReader.getEntries()
         let rgEntry: any
         for (const entry of entries) {
@@ -190,7 +190,7 @@ export namespace Ripgrep {
             stderr: "Failed to extract rg.exe from zip archive",
           })
         }
-        await Bun.write(filepath, await rgBlob.arrayBuffer())
+        await Filesystem.write(filepath, Buffer.from(await rgBlob.arrayBuffer()))
         await zipFileReader.close()
       }
       await fs.unlink(archivePath)

packages/opencode/src/file/time.ts

@@ -1,6 +1,7 @@
 import { Instance } from "../project/instance"
 import { Log } from "../util/log"
 import { Flag } from "../flag/flag"
+import { Filesystem } from "../util/filesystem"
 
 export namespace FileTime {
   const log = Log.create({ service: "file.time" })
@@ -59,10 +60,10 @@ export namespace FileTime {
 
     const time = get(sessionID, filepath)
     if (!time) throw new Error(`You must read file ${filepath} before overwriting it. Use the Read tool first`)
-    const stats = await Bun.file(filepath).stat()
-    if (stats.mtime.getTime() > time.getTime()) {
+    const mtime = Filesystem.stat(filepath)?.mtime
+    if (mtime && mtime.getTime() > time.getTime()) {
       throw new Error(
-        `File ${filepath} has been modified since it was last read.\nLast modification: ${stats.mtime.toISOString()}\nLast read: ${time.toISOString()}\n\nPlease read the file again before modifying it.`,
+        `File ${filepath} has been modified since it was last read.\nLast modification: ${mtime.toISOString()}\nLast read: ${time.toISOString()}\n\nPlease read the file again before modifying it.`,
       )
     }
   }

packages/opencode/src/flag/flag.ts

@@ -28,6 +28,7 @@ export namespace Flag {
   export declare const KILO_CLIENT: string
   export const KILO_SERVER_PASSWORD = process.env["KILO_SERVER_PASSWORD"]
   export const KILO_SERVER_USERNAME = process.env["KILO_SERVER_USERNAME"]
+  export const KILO_ENABLE_QUESTION_TOOL = truthy("KILO_ENABLE_QUESTION_TOOL")
 
   // Experimental
   export const KILO_EXPERIMENTAL = truthy("KILO_EXPERIMENTAL")

packages/opencode/src/format/formatter.ts

@@ -67,7 +67,10 @@ export const prettier: Info = {
   async enabled() {
     const items = await Filesystem.findUp("package.json", Instance.directory, Instance.worktree)
     for (const item of items) {
-      const json = await Bun.file(item).json()
+      const json = await Filesystem.readJson<{
+        dependencies?: Record<string, string>
+        devDependencies?: Record<string, string>
+      }>(item)
       if (json.dependencies?.prettier) return true
       if (json.devDependencies?.prettier) return true
     }
@@ -86,7 +89,10 @@ export const oxfmt: Info = {
     if (!Flag.KILO_EXPERIMENTAL_OXFMT) return false
     const items = await Filesystem.findUp("package.json", Instance.directory, Instance.worktree)
     for (const item of items) {
-      const json = await Bun.file(item).json()
+      const json = await Filesystem.readJson<{
+        dependencies?: Record<string, string>
+        devDependencies?: Record<string, string>
+      }>(item)
       if (json.dependencies?.oxfmt) return true
       if (json.devDependencies?.oxfmt) return true
     }
@@ -179,7 +185,7 @@ export const ruff: Info = {
       const found = await Filesystem.findUp(config, Instance.directory, Instance.worktree)
       if (found.length > 0) {
         if (config === "pyproject.toml") {
-          const content = await Bun.file(found[0]).text()
+          const content = await Filesystem.readText(found[0])
           if (content.includes("[tool.ruff]")) return true
         } else {
           return true
@@ -190,7 +196,7 @@ export const ruff: Info = {
     for (const dep of deps) {
       const found = await Filesystem.findUp(dep, Instance.directory, Instance.worktree)
       if (found.length > 0) {
-        const content = await Bun.file(found[0]).text()
+        const content = await Filesystem.readText(found[0])
         if (content.includes("ruff")) return true
       }
     }
@@ -348,7 +354,10 @@ export const pint: Info = {
   async enabled() {
     const items = await Filesystem.findUp("composer.json", Instance.directory, Instance.worktree)
     for (const item of items) {
-      const json = await Bun.file(item).json()
+      const json = await Filesystem.readJson<{
+        require?: Record<string, string>
+        "require-dev"?: Record<string, string>
+      }>(item)
       if (json.require?.["laravel/pint"]) return true
       if (json["require-dev"]?.["laravel/pint"]) return true
     }

packages/opencode/src/global/index.ts

@@ -2,6 +2,7 @@ import fs from "fs/promises"
 import { xdgData, xdgCache, xdgConfig, xdgState } from "xdg-basedir"
 import path from "path"
 import os from "os"
+import { Filesystem } from "../util/filesystem"
 
 const app = "kilo" // kilocode_change
 
@@ -35,9 +36,7 @@ await Promise.all([
 
 const CACHE_VERSION = "21"
 
-const version = await Bun.file(path.join(Global.Path.cache, "version"))
-  .text()
-  .catch(() => "0")
+const version = await Filesystem.readText(path.join(Global.Path.cache, "version")).catch(() => "0")
 
 if (version !== CACHE_VERSION) {
   try {
@@ -51,5 +50,5 @@ if (version !== CACHE_VERSION) {
       ),
     )
   } catch (e) {}
-  await Bun.file(path.join(Global.Path.cache, "version")).write(CACHE_VERSION)
+  await Filesystem.write(path.join(Global.Path.cache, "version"), CACHE_VERSION)
 }

packages/opencode/src/index.ts

@@ -13,6 +13,7 @@ import { Installation } from "./installation"
 import { NamedError } from "@opencode-ai/util/error"
 import { FormatError } from "./cli/error"
 import { ServeCommand } from "./cli/cmd/serve"
+import { Filesystem } from "./util/filesystem"
 import { DebugCommand } from "./cli/cmd/debug"
 import { StatsCommand } from "./cli/cmd/stats"
 import { McpCommand } from "./cli/cmd/mcp"
@@ -119,8 +120,9 @@ const cli = yargs(hideBin(process.argv))
 
     Telemetry.trackCliStart()
     // kilocode_change end
+
     const marker = path.join(Global.Path.data, "kilo.db")
-    if (!(await Bun.file(marker).exists())) {
+    if (!(await Filesystem.exists(marker))) {
       const tty = process.stderr.isTTY
       process.stderr.write("Performing one time database migration, may take a few minutes..." + EOL)
       const width = 36

packages/opencode/src/lsp/client.ts

@@ -147,8 +147,7 @@ export namespace LSPClient {
       notify: {
         async open(input: { path: string }) {
           input.path = path.isAbsolute(input.path) ? input.path : path.resolve(Instance.directory, input.path)
-          const file = Bun.file(input.path)
-          const text = await file.text()
+          const text = await Filesystem.readText(input.path)
           const extension = path.extname(input.path)
           const languageId = LANGUAGE_EXTENSIONS[extension] ?? "plaintext"
 

packages/opencode/src/lsp/language.ts

@@ -44,6 +44,7 @@ export const LANGUAGE_EXTENSIONS: Record<string, string> = {
   ".htm": "html",
   ".ini": "ini",
   ".java": "java",
+  ".jl": "julia",
   ".js": "javascript",
   ".kt": "kotlin",
   ".kts": "kotlin",

packages/opencode/src/lsp/server.ts

@@ -131,7 +131,7 @@ export namespace LSPServer {
           "bin",
           "vue-language-server.js",
         )
-        if (!(await Bun.file(js).exists())) {
+        if (!(await Filesystem.exists(js))) {
           if (Flag.KILO_DISABLE_LSP_DOWNLOAD) return
           await Bun.spawn([BunProc.which(), "install", "@vue/language-server"], {
             cwd: Global.Path.bin,
@@ -173,14 +173,14 @@ export namespace LSPServer {
       if (!eslint) return
       log.info("spawning eslint server")
       const serverPath = path.join(Global.Path.bin, "vscode-eslint", "server", "out", "eslintServer.js")
-      if (!(await Bun.file(serverPath).exists())) {
+      if (!(await Filesystem.exists(serverPath))) {
         if (Flag.KILO_DISABLE_LSP_DOWNLOAD) return
         log.info("downloading and building VS Code ESLint server")
         const response = await fetch("https://github.com/microsoft/vscode-eslint/archive/refs/heads/main.zip")
         if (!response.ok) return
 
         const zipPath = path.join(Global.Path.bin, "vscode-eslint.zip")
-        await Bun.file(zipPath).write(response)
+        if (response.body) await Filesystem.writeStream(zipPath, response.body)
 
         const ok = await Archive.extractZip(zipPath, Global.Path.bin)
           .then(() => true)
@@ -242,7 +242,7 @@ export namespace LSPServer {
 
       const resolveBin = async (target: string) => {
         const localBin = path.join(root, target)
-        if (await Bun.file(localBin).exists()) return localBin
+        if (await Filesystem.exists(localBin)) return localBin
 
         const candidates = Filesystem.up({
           targets: [target],
@@ -326,7 +326,7 @@ export namespace LSPServer {
     async spawn(root) {
       const localBin = path.join(root, "node_modules", ".bin", "biome")
       let bin: string | undefined
-      if (await Bun.file(localBin).exists()) bin = localBin
+      if (await Filesystem.exists(localBin)) bin = localBin
       if (!bin) {
         const found = Bun.which("biome")
         if (found) bin = found
@@ -467,7 +467,7 @@ export namespace LSPServer {
         const potentialPythonPath = isWindows
           ? path.join(venvPath, "Scripts", "python.exe")
           : path.join(venvPath, "bin", "python")
-        if (await Bun.file(potentialPythonPath).exists()) {
+        if (await Filesystem.exists(potentialPythonPath)) {
           initialization["pythonPath"] = potentialPythonPath
           break
         }
@@ -479,7 +479,7 @@ export namespace LSPServer {
           const potentialTyPath = isWindows
             ? path.join(venvPath, "Scripts", "ty.exe")
             : path.join(venvPath, "bin", "ty")
-          if (await Bun.file(potentialTyPath).exists()) {
+          if (await Filesystem.exists(potentialTyPath)) {
             binary = potentialTyPath
             break
           }
@@ -511,7 +511,7 @@ export namespace LSPServer {
       const args = []
       if (!binary) {
         const js = path.join(Global.Path.bin, "node_modules", "pyright", "dist", "pyright-langserver.js")
-        if (!(await Bun.file(js).exists())) {
+        if (!(await Filesystem.exists(js))) {
           if (Flag.KILO_DISABLE_LSP_DOWNLOAD) return
           await Bun.spawn([BunProc.which(), "install", "pyright"], {
             cwd: Global.Path.bin,
@@ -536,7 +536,7 @@ export namespace LSPServer {
         const potentialPythonPath = isWindows
           ? path.join(venvPath, "Scripts", "python.exe")
           : path.join(venvPath, "bin", "python")
-        if (await Bun.file(potentialPythonPath).exists()) {
+        if (await Filesystem.exists(potentialPythonPath)) {
           initialization["pythonPath"] = potentialPythonPath
           break
         }
@@ -571,7 +571,7 @@ export namespace LSPServer {
           process.platform === "win32" ? "language_server.bat" : "language_server.sh",
         )
 
-        if (!(await Bun.file(binary).exists())) {
+        if (!(await Filesystem.exists(binary))) {
           const elixir = Bun.which("elixir")
           if (!elixir) {
             log.error("elixir is required to run elixir-ls")
@@ -584,7 +584,7 @@ export namespace LSPServer {
           const response = await fetch("https://github.com/elixir-lsp/elixir-ls/archive/refs/heads/master.zip")
           if (!response.ok) return
           const zipPath = path.join(Global.Path.bin, "elixir-ls.zip")
-          await Bun.file(zipPath).write(response)
+          if (response.body) await Filesystem.writeStream(zipPath, response.body)
 
           const ok = await Archive.extractZip(zipPath, Global.Path.bin)
             .then(() => true)
@@ -692,7 +692,7 @@ export namespace LSPServer {
         }
 
         const tempPath = path.join(Global.Path.bin, assetName)
-        await Bun.file(tempPath).write(downloadResponse)
+        if (downloadResponse.body) await Filesystem.writeStream(tempPath, downloadResponse.body)
 
         if (ext === "zip") {
           const ok = await Archive.extractZip(tempPath, Global.Path.bin)
@@ -710,7 +710,7 @@ export namespace LSPServer {
 
         bin = path.join(Global.Path.bin, "zls" + (platform === "win32" ? ".exe" : ""))
 
-        if (!(await Bun.file(bin).exists())) {
+        if (!(await Filesystem.exists(bin))) {
           log.error("Failed to extract zls binary")
           return
         }
@@ -857,7 +857,7 @@ export namespace LSPServer {
         // Stop at filesystem root
         const cargoTomlPath = path.join(currentDir, "Cargo.toml")
         try {
-          const cargoTomlContent = await Bun.file(cargoTomlPath).text()
+          const cargoTomlContent = await Filesystem.readText(cargoTomlPath)
           if (cargoTomlContent.includes("[workspace]")) {
             return currentDir
           }
@@ -907,7 +907,7 @@ export namespace LSPServer {
 
       const ext = process.platform === "win32" ? ".exe" : ""
       const direct = path.join(Global.Path.bin, "clangd" + ext)
-      if (await Bun.file(direct).exists()) {
+      if (await Filesystem.exists(direct)) {
         return {
           process: spawn(direct, args, {
             cwd: root,
@@ -920,7 +920,7 @@ export namespace LSPServer {
         if (!entry.isDirectory()) continue
         if (!entry.name.startsWith("clangd_")) continue
         const candidate = path.join(Global.Path.bin, entry.name, "bin", "clangd" + ext)
-        if (await Bun.file(candidate).exists()) {
+        if (await Filesystem.exists(candidate)) {
           return {
             process: spawn(candidate, args, {
               cwd: root,
@@ -990,7 +990,7 @@ export namespace LSPServer {
         log.error("Failed to write clangd archive")
         return
       }
-      await Bun.write(archive, buf)
+      await Filesystem.write(archive, Buffer.from(buf))
 
       const zip = name.endsWith(".zip")
       const tar = name.endsWith(".tar.xz")
@@ -1014,7 +1014,7 @@ export namespace LSPServer {
       await fs.rm(archive, { force: true })
 
       const bin = path.join(Global.Path.bin, "clangd_" + tag, "bin", "clangd" + ext)
-      if (!(await Bun.file(bin).exists())) {
+      if (!(await Filesystem.exists(bin))) {
         log.error("Failed to extract clangd binary")
         return
       }
@@ -1045,7 +1045,7 @@ export namespace LSPServer {
       const args: string[] = []
       if (!binary) {
         const js = path.join(Global.Path.bin, "node_modules", "svelte-language-server", "bin", "server.js")
-        if (!(await Bun.file(js).exists())) {
+        if (!(await Filesystem.exists(js))) {
           if (Flag.KILO_DISABLE_LSP_DOWNLOAD) return
           await Bun.spawn([BunProc.which(), "install", "svelte-language-server"], {
             cwd: Global.Path.bin,
@@ -1092,7 +1092,7 @@ export namespace LSPServer {
       const args: string[] = []
       if (!binary) {
         const js = path.join(Global.Path.bin, "node_modules", "@astrojs", "language-server", "bin", "nodeServer.js")
-        if (!(await Bun.file(js).exists())) {
+        if (!(await Filesystem.exists(js))) {
           if (Flag.KILO_DISABLE_LSP_DOWNLOAD) return
           await Bun.spawn([BunProc.which(), "install", "@astrojs/language-server"], {
             cwd: Global.Path.bin,
@@ -1248,7 +1248,7 @@ export namespace LSPServer {
       const distPath = path.join(Global.Path.bin, "kotlin-ls")
       const launcherScript =
         process.platform === "win32" ? path.join(distPath, "kotlin-lsp.cmd") : path.join(distPath, "kotlin-lsp.sh")
-      const installed = await Bun.file(launcherScript).exists()
+      const installed = await Filesystem.exists(launcherScript)
       if (!installed) {
         if (Flag.KILO_DISABLE_LSP_DOWNLOAD) return
         log.info("Downloading Kotlin Language Server from GitHub.")
@@ -1307,7 +1307,7 @@ export namespace LSPServer {
         }
         log.info("Installed Kotlin Language Server", { path: launcherScript })
       }
-      if (!(await Bun.file(launcherScript).exists())) {
+      if (!(await Filesystem.exists(launcherScript))) {
         log.error(`Failed to locate the Kotlin LS launcher script in the installed directory: ${distPath}.`)
         return
       }
@@ -1336,7 +1336,7 @@ export namespace LSPServer {
           "src",
           "server.js",
         )
-        const exists = await Bun.file(js).exists()
+        const exists = await Filesystem.exists(js)
         if (!exists) {
           if (Flag.KILO_DISABLE_LSP_DOWNLOAD) return
           await Bun.spawn([BunProc.which(), "install", "yaml-language-server"], {
@@ -1443,7 +1443,7 @@ export namespace LSPServer {
         }
 
         const tempPath = path.join(Global.Path.bin, assetName)
-        await Bun.file(tempPath).write(downloadResponse)
+        if (downloadResponse.body) await Filesystem.writeStream(tempPath, downloadResponse.body)
 
         // Unlike zls which is a single self-contained binary,
         // lua-language-server needs supporting files (meta/, locale/, etc.)
@@ -1482,7 +1482,7 @@ export namespace LSPServer {
         // Binary is located in bin/ subdirectory within the extracted archive
         bin = path.join(installDir, "bin", "lua-language-server" + (platform === "win32" ? ".exe" : ""))
 
-        if (!(await Bun.file(bin).exists())) {
+        if (!(await Filesystem.exists(bin))) {
           log.error("Failed to extract lua-language-server binary")
           return
         }
@@ -1516,7 +1516,7 @@ export namespace LSPServer {
       const args: string[] = []
       if (!binary) {
         const js = path.join(Global.Path.bin, "node_modules", "intelephense", "lib", "intelephense.js")
-        if (!(await Bun.file(js).exists())) {
+        if (!(await Filesystem.exists(js))) {
           if (Flag.KILO_DISABLE_LSP_DOWNLOAD) return
           await Bun.spawn([BunProc.which(), "install", "intelephense"], {
             cwd: Global.Path.bin,
@@ -1613,7 +1613,7 @@ export namespace LSPServer {
       const args: string[] = []
       if (!binary) {
         const js = path.join(Global.Path.bin, "node_modules", "bash-language-server", "out", "cli.js")
-        if (!(await Bun.file(js).exists())) {
+        if (!(await Filesystem.exists(js))) {
           if (Flag.KILO_DISABLE_LSP_DOWNLOAD) return
           await Bun.spawn([BunProc.which(), "install", "bash-language-server"], {
             cwd: Global.Path.bin,
@@ -1654,22 +1654,17 @@ export namespace LSPServer {
 
       if (!bin) {
         if (Flag.KILO_DISABLE_LSP_DOWNLOAD) return
-        log.info("downloading terraform-ls from GitHub releases")
+        log.info("downloading terraform-ls from HashiCorp releases")
 
-        const releaseResponse = await fetch("https://api.github.com/repos/hashicorp/terraform-ls/releases/latest")
+        const releaseResponse = await fetch("https://api.releases.hashicorp.com/v1/releases/terraform-ls/latest")
         if (!releaseResponse.ok) {
           log.error("Failed to fetch terraform-ls release info")
           return
         }
 
         const release = (await releaseResponse.json()) as {
-          tag_name?: string
-          assets?: { name?: string; browser_download_url?: string }[]
-        }
-        const version = release.tag_name?.replace("v", "")
-        if (!version) {
-          log.error("terraform-ls release did not include a version tag")
-          return
+          version?: string
+          builds?: { arch?: string; os?: string; url?: string }[]
         }
 
         const platform = process.platform
@@ -1678,23 +1673,21 @@ export namespace LSPServer {
         const tfArch = arch === "arm64" ? "arm64" : "amd64"
         const tfPlatform = platform === "win32" ? "windows" : platform
 
-        const assetName = `terraform-ls_${version}_${tfPlatform}_${tfArch}.zip`
-
-        const assets = release.assets ?? []
-        const asset = assets.find((a) => a.name === assetName)
-        if (!asset?.browser_download_url) {
-          log.error(`Could not find asset ${assetName} in terraform-ls release`)
+        const builds = release.builds ?? []
+        const build = builds.find((b) => b.arch === tfArch && b.os === tfPlatform)
+        if (!build?.url) {
+          log.error(`Could not find build for ${tfPlatform}/${tfArch} terraform-ls release version ${release.version}`)
           return
         }
 
-        const downloadResponse = await fetch(asset.browser_download_url)
+        const downloadResponse = await fetch(build.url)
         if (!downloadResponse.ok) {
           log.error("Failed to download terraform-ls")
           return
         }
 
-        const tempPath = path.join(Global.Path.bin, assetName)
-        await Bun.file(tempPath).write(downloadResponse)
+        const tempPath = path.join(Global.Path.bin, "terraform-ls.zip")
+        if (downloadResponse.body) await Filesystem.writeStream(tempPath, downloadResponse.body)
 
         const ok = await Archive.extractZip(tempPath, Global.Path.bin)
           .then(() => true)
@@ -1707,7 +1700,7 @@ export namespace LSPServer {
 
         bin = path.join(Global.Path.bin, "terraform-ls" + (platform === "win32" ? ".exe" : ""))
 
-        if (!(await Bun.file(bin).exists())) {
+        if (!(await Filesystem.exists(bin))) {
           log.error("Failed to extract terraform-ls binary")
           return
         }
@@ -1784,7 +1777,7 @@ export namespace LSPServer {
         }
 
         const tempPath = path.join(Global.Path.bin, assetName)
-        await Bun.file(tempPath).write(downloadResponse)
+        if (downloadResponse.body) await Filesystem.writeStream(tempPath, downloadResponse.body)
 
         if (ext === "zip") {
           const ok = await Archive.extractZip(tempPath, Global.Path.bin)
@@ -1803,7 +1796,7 @@ export namespace LSPServer {
 
         bin = path.join(Global.Path.bin, "texlab" + (platform === "win32" ? ".exe" : ""))
 
-        if (!(await Bun.file(bin).exists())) {
+        if (!(await Filesystem.exists(bin))) {
           log.error("Failed to extract texlab binary")
           return
         }
@@ -1832,7 +1825,7 @@ export namespace LSPServer {
       const args: string[] = []
       if (!binary) {
         const js = path.join(Global.Path.bin, "node_modules", "dockerfile-language-server-nodejs", "lib", "server.js")
-        if (!(await Bun.file(js).exists())) {
+        if (!(await Filesystem.exists(js))) {
           if (Flag.KILO_DISABLE_LSP_DOWNLOAD) return
           await Bun.spawn([BunProc.which(), "install", "dockerfile-language-server-nodejs"], {
             cwd: Global.Path.bin,
@@ -1990,7 +1983,7 @@ export namespace LSPServer {
         }
 
         const tempPath = path.join(Global.Path.bin, assetName)
-        await Bun.file(tempPath).write(downloadResponse)
+        if (downloadResponse.body) await Filesystem.writeStream(tempPath, downloadResponse.body)
 
         if (ext === "zip") {
           const ok = await Archive.extractZip(tempPath, Global.Path.bin)
@@ -2008,7 +2001,7 @@ export namespace LSPServer {
 
         bin = path.join(Global.Path.bin, "tinymist" + (platform === "win32" ? ".exe" : ""))
 
-        if (!(await Bun.file(bin).exists())) {
+        if (!(await Filesystem.exists(bin))) {
           log.error("Failed to extract tinymist binary")
           return
         }
@@ -2043,4 +2036,22 @@ export namespace LSPServer {
       }
     },
   }
+
+  export const JuliaLS: Info = {
+    id: "julials",
+    extensions: [".jl"],
+    root: NearestRoot(["Project.toml", "Manifest.toml", "*.jl"]),
+    async spawn(root) {
+      const julia = Bun.which("julia")
+      if (!julia) {
+        log.info("julia not found, please install julia first (https://julialang.org/downloads/)")
+        return
+      }
+      return {
+        process: spawn(julia, ["--startup-file=no", "--history-file=no", "-e", "using LanguageServer; runserver()"], {
+          cwd: root,
+        }),
+      }
+    },
+  }
 }

packages/opencode/src/mcp/auth.ts

@@ -1,6 +1,7 @@
 import path from "path"
 import z from "zod"
 import { Global } from "../global"
+import { Filesystem } from "../util/filesystem"
 
 export namespace McpAuth {
   export const Tokens = z.object({
@@ -53,25 +54,22 @@ export namespace McpAuth {
   }
 
   export async function all(): Promise<Record<string, Entry>> {
-    const file = Bun.file(filepath)
-    return file.json().catch(() => ({}))
+    return Filesystem.readJson<Record<string, Entry>>(filepath).catch(() => ({}))
   }
 
   export async function set(mcpName: string, entry: Entry, serverUrl?: string): Promise<void> {
-    const file = Bun.file(filepath)
     const data = await all()
     // Always update serverUrl if provided
     if (serverUrl) {
       entry.serverUrl = serverUrl
     }
-    await Bun.write(file, JSON.stringify({ ...data, [mcpName]: entry }, null, 2), { mode: 0o600 })
+    await Filesystem.writeJson(filepath, { ...data, [mcpName]: entry }, 0o600)
   }
 
   export async function remove(mcpName: string): Promise<void> {
-    const file = Bun.file(filepath)
     const data = await all()
     delete data[mcpName]
-    await Bun.write(file, JSON.stringify(data, null, 2), { mode: 0o600 })
+    await Filesystem.writeJson(filepath, data, 0o600)
   }
 
   export async function updateTokens(mcpName: string, tokens: Tokens, serverUrl?: string): Promise<void> {

packages/opencode/src/mcp/oauth-provider.ts

@@ -149,6 +149,28 @@ export class McpOAuthProvider implements OAuthClientProvider {
     }
     return entry.oauthState
   }
+
+  async invalidateCredentials(type: "all" | "client" | "tokens"): Promise<void> {
+    log.info("invalidating credentials", { mcpName: this.mcpName, type })
+    const entry = await McpAuth.get(this.mcpName)
+    if (!entry) {
+      return
+    }
+
+    switch (type) {
+      case "all":
+        await McpAuth.remove(this.mcpName)
+        break
+      case "client":
+        delete entry.clientInfo
+        await McpAuth.set(this.mcpName, entry)
+        break
+      case "tokens":
+        delete entry.tokens
+        await McpAuth.set(this.mcpName, entry)
+        break
+    }
+  }
 }
 
 export { OAUTH_CALLBACK_PORT, OAUTH_CALLBACK_PATH }

packages/opencode/src/project/project.ts

@@ -13,6 +13,7 @@ import { iife } from "@/util/iife"
 import { GlobalBus } from "@/bus/global"
 import { existsSync } from "fs"
 import { git } from "../util/git"
+import { Glob } from "../util/glob"
 
 export namespace Project {
   const log = Log.create({ service: "project" })
@@ -86,8 +87,7 @@ export namespace Project {
         const gitBinary = Bun.which("git")
 
         // cached id calculation
-        let id = await Bun.file(path.join(dotgit, "opencode"))
-          .text()
+        let id = await Filesystem.readText(path.join(dotgit, "opencode"))
           .then((x) => x.trim())
           .catch(() => undefined)
 
@@ -125,9 +125,7 @@ export namespace Project {
 
           id = roots[0]
           if (id) {
-            void Bun.file(path.join(dotgit, "opencode"))
-              .write(id)
-              .catch(() => undefined)
+            void Filesystem.write(path.join(dotgit, "opencode"), id).catch(() => undefined)
           }
         }
 
@@ -265,22 +263,16 @@ export namespace Project {
     if (input.vcs !== "git") return
     if (input.icon?.override) return
     if (input.icon?.url) return
-    const glob = new Bun.Glob("**/{favicon}.{ico,png,svg,jpg,jpeg,webp}")
-    const matches = await Array.fromAsync(
-      glob.scan({
-        cwd: input.worktree,
-        absolute: true,
-        onlyFiles: true,
-        followSymlinks: false,
-        dot: false,
-      }),
-    )
+    const matches = await Glob.scan("**/favicon.{ico,png,svg,jpg,jpeg,webp}", {
+      cwd: input.worktree,
+      absolute: true,
+      include: "file",
+    })
     const shortest = matches.sort((a, b) => a.length - b.length)[0]
     if (!shortest) return
-    const file = Bun.file(shortest)
-    const buffer = await file.arrayBuffer()
-    const base64 = Buffer.from(buffer).toString("base64")
-    const mime = file.type || "image/png"
+    const buffer = await Filesystem.readBytes(shortest)
+    const base64 = buffer.toString("base64")
+    const mime = Filesystem.mimeType(shortest) || "image/png"
     const url = `data:${mime};base64,${base64}`
     await update({
       projectID: input.id,
@@ -381,10 +373,8 @@ export namespace Project {
     const data = fromRow(row)
     const valid: string[] = []
     for (const dir of data.sandboxes) {
-      const stat = await Bun.file(dir)
-        .stat()
-        .catch(() => undefined)
-      if (stat?.isDirectory()) valid.push(dir)
+      const s = Filesystem.stat(dir)
+      if (s?.isDirectory()) valid.push(dir)
     }
     return valid
   }

packages/opencode/src/provider/models.ts

@@ -9,6 +9,7 @@ import { Config } from "../config/config" // kilocode_change
 import { ModelCache } from "./model-cache" // kilocode_change
 import { Auth } from "../auth" // kilocode_change
 import { KILO_OPENROUTER_BASE } from "@kilocode/kilo-gateway" // kilocode_change
+import { Filesystem } from "../util/filesystem"
 
 // Try to import bundled snapshot (generated at build time)
 // Falls back to undefined in dev mode when snapshot doesn't exist
@@ -105,8 +106,7 @@ export namespace ModelsDev {
   }
 
   export const Data = lazy(async () => {
-    const file = Bun.file(Flag.KILO_MODELS_PATH ?? filepath)
-    const result = await file.json().catch(() => {})
+    const result = await Filesystem.readJson(Flag.KILO_MODELS_PATH ?? filepath).catch(() => {})
     if (result) return result
     // @ts-ignore
     const snapshot = await import("./models-snapshot")
@@ -165,7 +165,6 @@ export namespace ModelsDev {
   }
 
   export async function refresh() {
-    const file = Bun.file(filepath)
     const result = await fetch(`${url()}/api.json`, {
       headers: {
         "User-Agent": Installation.USER_AGENT,
@@ -177,13 +176,13 @@ export namespace ModelsDev {
       })
     })
     if (result && result.ok) {
-      await Bun.write(file, await result.text())
+      await Filesystem.write(filepath, await result.text())
       ModelsDev.Data.reset()
     }
   }
 }
 
-if (!Flag.KILO_DISABLE_MODELS_FETCH) {
+if (!Flag.KILO_DISABLE_MODELS_FETCH && !process.argv.includes("--get-yargs-completions")) {
   ModelsDev.refresh()
   setInterval(
     async () => {

packages/opencode/src/provider/provider.ts

@@ -16,6 +16,7 @@ import { Flag } from "../flag/flag"
 import { iife } from "@/util/iife"
 import { Global } from "../global"
 import path from "path"
+import { Filesystem } from "../util/filesystem"
 
 // Direct imports for bundled providers
 import { createAmazonBedrock, type AmazonBedrockProviderSettings } from "@ai-sdk/amazon-bedrock"
@@ -40,6 +41,8 @@ import { createTogetherAI } from "@ai-sdk/togetherai"
 import { createPerplexity } from "@ai-sdk/perplexity"
 import { createVercel } from "@ai-sdk/vercel"
 import { createGitLab, VERSION as GITLAB_PROVIDER_VERSION } from "@gitlab/gitlab-ai-provider"
+import { fromNodeProviderChain } from "@aws-sdk/credential-providers"
+import { GoogleAuth } from "google-auth-library"
 import { ProviderTransform } from "./transform"
 import { Installation } from "../installation"
 
@@ -236,8 +239,6 @@ export namespace Provider {
       // Only use credential chain if no bearer token exists
       // Bearer token takes precedence over credential chain (profiles, access keys, IAM roles, web identity tokens)
       if (!awsBearerToken) {
-        const { fromNodeProviderChain } = await import(await BunProc.install("@aws-sdk/credential-providers"))
-
         // Build credential provider options (only pass profile if specified)
         const credentialProviderOptions = profile ? { profile } : {}
 
@@ -374,11 +375,9 @@ export namespace Provider {
           project,
           location,
           fetch: async (input: RequestInfo | URL, init?: RequestInit) => {
-            const { GoogleAuth } = await import(await BunProc.install("google-auth-library"))
             const auth = new GoogleAuth()
             const client = await auth.getApplicationDefault()
-            const credentials = await client.credential
-            const token = await credentials.getAccessToken()
+            const token = await client.credential.getAccessToken()
 
             const headers = new Headers(init?.headers)
             headers.set("Authorization", `Bearer ${token.token}`)
@@ -1309,8 +1308,9 @@ export namespace Provider {
     if (cfg.model) return parseModel(cfg.model)
 
     const providers = await list()
-    const recent = (await Bun.file(path.join(Global.Path.state, "model.json"))
-      .json()
+    const recent = (await Filesystem.readJson<{ recent?: { providerID: string; modelID: string }[] }>(
+      path.join(Global.Path.state, "model.json"),
+    )
       .then((x) => (Array.isArray(x.recent) ? x.recent : []))
       .catch(() => [])) as { providerID: string; modelID: string }[]
     for (const entry of recent) {

packages/opencode/src/provider/transform.ts

@@ -634,12 +634,19 @@ export namespace ProviderTransform {
             },
           }
         }
+        let levels = ["low", "high"]
+        if (id.includes("3.1")) {
+          levels = ["low", "medium", "high"]
+        }
+
         return Object.fromEntries(
-          ["low", "high"].map((effort) => [
+          levels.map((effort) => [
             effort,
             {
-              includeThoughts: true,
-              thinkingLevel: effort,
+              thinkingConfig: {
+                includeThoughts: true,
+                thinkingLevel: effort,
+              },
             },
           ]),
         )
@@ -659,8 +666,7 @@ export namespace ProviderTransform {
           groqEffort.map((effort) => [
             effort,
             {
-              includeThoughts: true,
-              thinkingLevel: effort,
+              reasoningEffort: effort,
             },
           ]),
         )

packages/opencode/src/pty/index.ts

@@ -18,11 +18,18 @@ export namespace Pty {
 
   type Socket = {
     readyState: number
-    send: (data: string | Uint8Array<ArrayBuffer> | ArrayBuffer) => void
+    data?: unknown
+    send: (data: string | Uint8Array | ArrayBuffer) => void
     close: (code?: number, reason?: string) => void
   }
 
+  type Subscriber = {
+    id: number
+    token: unknown
+  }
+
   const sockets = new WeakMap<object, number>()
+  const owners = new WeakMap<object, string>()
   let socketCounter = 0
 
   const tagSocket = (ws: Socket) => {
@@ -32,7 +39,20 @@ export namespace Pty {
     return next
   }
 
-  // WebSocket control frame: 0x00 + UTF-8 JSON (currently { cursor }).
+  const token = (ws: Socket) => {
+    const data = ws.data
+    if (!data || typeof data !== "object") return
+
+    const events = (data as { events?: unknown }).events
+    if (events && typeof events === "object") return events
+
+    const url = (data as { url?: unknown }).url
+    if (url && typeof url === "object") return url
+
+    return data
+  }
+
+  // WebSocket control frame: 0x00 + UTF-8 JSON.
   const meta = (cursor: number) => {
     const json = JSON.stringify({ cursor })
     const bytes = encoder.encode(json)
@@ -96,7 +116,7 @@ export namespace Pty {
     buffer: string
     bufferCursor: number
     cursor: number
-    subscribers: Map<Socket, number>
+    subscribers: Map<Socket, Subscriber>
   }
 
   const state = Instance.state(
@@ -176,26 +196,33 @@ export namespace Pty {
       subscribers: new Map(),
     }
     state().set(id, session)
-    ptyProcess.onData((data) => {
-      session.cursor += data.length
+    ptyProcess.onData((chunk) => {
+      session.cursor += chunk.length
 
-      for (const [ws, id] of session.subscribers) {
+      for (const [ws, sub] of session.subscribers) {
         if (ws.readyState !== 1) {
           session.subscribers.delete(ws)
           continue
         }
-        if (typeof ws === "object" && sockets.get(ws) !== id) {
+
+        if (typeof ws === "object" && sockets.get(ws) !== sub.id) {
           session.subscribers.delete(ws)
           continue
         }
+
+        if (sub.token !== undefined && token(ws) !== sub.token) {
+          session.subscribers.delete(ws)
+          continue
+        }
+
         try {
-          ws.send(data)
+          ws.send(chunk)
         } catch {
           session.subscribers.delete(ws)
         }
       }
 
-      session.buffer += data
+      session.buffer += chunk
       if (session.buffer.length <= BUFFER_LIMIT) return
       const excess = session.buffer.length - BUFFER_LIMIT
       session.buffer = session.buffer.slice(excess)
@@ -273,6 +300,25 @@ export namespace Pty {
     }
     log.info("client connected to session", { id })
 
+    const socketId = tagSocket(ws)
+    if (socketId === undefined) {
+      ws.close()
+      return
+    }
+
+    const previous = owners.get(ws)
+    if (previous && previous !== id) {
+      state().get(previous)?.subscribers.delete(ws)
+    }
+
+    owners.set(ws, id)
+    session.subscribers.set(ws, { id: socketId, token: token(ws) })
+
+    const cleanup = () => {
+      session.subscribers.delete(ws)
+      if (owners.get(ws) === id) owners.delete(ws)
+    }
+
     const start = session.bufferCursor
     const end = session.cursor
 
@@ -293,6 +339,7 @@ export namespace Pty {
           ws.send(data.slice(i, i + BUFFER_CHUNK))
         }
       } catch {
+        cleanup()
         ws.close()
         return
       }
@@ -301,19 +348,17 @@ export namespace Pty {
     try {
       ws.send(meta(end))
     } catch {
+      cleanup()
       ws.close()
       return
     }
-
-    const socketId = tagSocket(ws)
-    if (typeof socketId === "number") session.subscribers.set(ws, socketId)
     return {
       onMessage: (message: string | ArrayBuffer) => {
         session.process.write(String(message))
       },
       onClose: () => {
         log.info("client disconnected from session", { id })
-        session.subscribers.delete(ws)
+        cleanup()
       },
     }
   }

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

@@ -66,6 +66,8 @@ export const GlobalRoutes = lazy(() =>
       }),
       async (c) => {
         log.info("global event connected")
+        c.header("X-Accel-Buffering", "no")
+        c.header("X-Content-Type-Options", "nosniff")
         return streamSSE(c, async (stream) => {
           stream.writeSSE({
             data: JSON.stringify({
@@ -82,7 +84,7 @@ export const GlobalRoutes = lazy(() =>
           }
           GlobalBus.on("event", handler)
 
-          // Send heartbeat every 30s to prevent WKWebView timeout (60s default)
+          // Send heartbeat every 10s to prevent stalled proxy streams.
           const heartbeat = setInterval(() => {
             stream.writeSSE({
               data: JSON.stringify({
@@ -92,7 +94,7 @@ export const GlobalRoutes = lazy(() =>
                 },
               }),
             })
-          }, 30000)
+          }, 10_000)
 
           await new Promise<void>((resolve) => {
             stream.onAbort(() => {

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

@@ -163,7 +163,7 @@ export const PtyRoutes = lazy(() =>
 
         type Socket = {
           readyState: number
-          send: (data: string | Uint8Array<ArrayBuffer> | ArrayBuffer) => void
+          send: (data: string | Uint8Array | ArrayBuffer) => void
           close: (code?: number, reason?: string) => void
         }
 
@@ -177,11 +177,16 @@ export const PtyRoutes = lazy(() =>
 
         return {
           onOpen(_event, ws) {
-            const socket = isSocket(ws.raw) ? ws.raw : ws
+            const socket = ws.raw
+            if (!isSocket(socket)) {
+              ws.close()
+              return
+            }
             handler = Pty.connect(id, socket, cursor)
           },
           onMessage(event) {
-            handler?.onMessage(String(event.data))
+            if (typeof event.data !== "string") return
+            handler?.onMessage(event.data)
           },
           onClose() {
             handler?.onClose()

packages/opencode/src/server/server.ts

@@ -520,6 +520,8 @@ export namespace Server {
           }),
           async (c) => {
             log.info("event connected")
+            c.header("X-Accel-Buffering", "no")
+            c.header("X-Content-Type-Options", "nosniff")
             return streamSSE(c, async (stream) => {
               stream.writeSSE({
                 data: JSON.stringify({
@@ -536,7 +538,7 @@ export namespace Server {
                 }
               })
 
-              // Send heartbeat every 30s to prevent WKWebView timeout (60s default)
+              // Send heartbeat every 10s to prevent stalled proxy streams.
               const heartbeat = setInterval(() => {
                 stream.writeSSE({
                   data: JSON.stringify({
@@ -544,7 +546,7 @@ export namespace Server {
                     properties: {},
                   }),
                 })
-              }, 30000)
+              }, 10_000)
 
               await new Promise<void>((resolve) => {
                 stream.onAbort(() => {

packages/opencode/src/session/index.ts

@@ -614,7 +614,7 @@ export namespace Session {
   })
 
   export const updateMessage = fn(MessageV2.Info, async (msg) => {
-    const time_created = msg.role === "user" ? msg.time.created : msg.time.created
+    const time_created = msg.time.created
     const { id, sessionID, ...data } = msg
     Database.use((db) => {
       db.insert(MessageTable)

packages/opencode/src/session/instruction.ts

@@ -6,6 +6,7 @@ import { Config } from "../config/config"
 import { Instance } from "../project/instance"
 import { Flag } from "@/flag/flag"
 import { Log } from "../util/log"
+import { Glob } from "../util/glob"
 import type { MessageV2 } from "./message-v2"
 
 const log = Log.create({ service: "instruction" })
@@ -83,7 +84,7 @@ export namespace InstructionPrompt {
     }
 
     for (const file of globalFiles()) {
-      if (await Bun.file(file).exists()) {
+      if (await Filesystem.exists(file)) {
         paths.add(path.resolve(file))
         break
       }
@@ -96,13 +97,11 @@ export namespace InstructionPrompt {
           instruction = path.join(os.homedir(), instruction.slice(2))
         }
         const matches = path.isAbsolute(instruction)
-          ? await Array.fromAsync(
-              new Bun.Glob(path.basename(instruction)).scan({
-                cwd: path.dirname(instruction),
-                absolute: true,
-                onlyFiles: true,
-              }),
-            ).catch(() => [])
+          ? await Glob.scan(path.basename(instruction), {
+              cwd: path.dirname(instruction),
+              absolute: true,
+              include: "file",
+            }).catch(() => [])
           : await resolveRelative(instruction)
         matches.forEach((p) => {
           paths.add(path.resolve(p))
@@ -118,9 +117,7 @@ export namespace InstructionPrompt {
     const paths = await systemPaths()
 
     const files = Array.from(paths).map(async (p) => {
-      const content = await Bun.file(p)
-        .text()
-        .catch(() => "")
+      const content = await Filesystem.readText(p).catch(() => "")
       return content ? "Instructions from: " + p + "\n" + content : ""
     })
 
@@ -162,7 +159,7 @@ export namespace InstructionPrompt {
   export async function find(dir: string) {
     for (const file of FILES) {
       const filepath = path.resolve(path.join(dir, file))
-      if (await Bun.file(filepath).exists()) return filepath
+      if (await Filesystem.exists(filepath)) return filepath
     }
   }
 
@@ -180,9 +177,7 @@ export namespace InstructionPrompt {
 
       if (found && found !== target && !system.has(found) && !already.has(found) && !isClaimed(messageID, found)) {
         claim(messageID, found)
-        const content = await Bun.file(found)
-          .text()
-          .catch(() => undefined)
+        const content = await Filesystem.readText(found).catch(() => undefined)
         if (content) {
           results.push({ filepath: found, content: "Instructions from: " + found + "\n" + content })
         }

packages/opencode/src/session/prompt.ts

@@ -2,6 +2,7 @@ import path from "path"
 import os from "os"
 import fs from "fs/promises"
 import z from "zod"
+import { Filesystem } from "../util/filesystem"
 import { Identifier } from "../id/id"
 import { MessageV2 } from "./message-v2"
 import { Log } from "../util/log"
@@ -477,6 +478,12 @@ export namespace SessionPrompt {
           log.error("subtask execution failed", { error, agent: task.agent, description: task.description })
           return undefined
         })
+        const attachments = result?.attachments?.map((attachment) => ({
+          ...attachment,
+          id: Identifier.ascending("part"),
+          sessionID,
+          messageID: assistantMessage.id,
+        }))
         await Plugin.trigger(
           "tool.execute.after",
           {
@@ -499,7 +506,7 @@ export namespace SessionPrompt {
               title: result.title,
               metadata: result.metadata,
               output: result.output,
-              attachments: result.attachments,
+              attachments,
               time: {
                 ...part.state.time,
                 end: Date.now(),
@@ -838,6 +845,15 @@ export namespace SessionPrompt {
             },
           )
           const result = await item.execute(args, ctx)
+          const output = {
+            ...result,
+            attachments: result.attachments?.map((attachment) => ({
+              ...attachment,
+              id: Identifier.ascending("part"),
+              sessionID: ctx.sessionID,
+              messageID: input.processor.message.id,
+            })),
+          }
           await Plugin.trigger(
             "tool.execute.after",
             {
@@ -846,9 +862,9 @@ export namespace SessionPrompt {
               callID: ctx.callID,
               args,
             },
-            result,
+            output,
           )
-          return result
+          return output
         },
       })
     }
@@ -896,16 +912,13 @@ export namespace SessionPrompt {
         )
 
         const textParts: string[] = []
-        const attachments: MessageV2.FilePart[] = []
+        const attachments: Omit<MessageV2.FilePart, "id" | "sessionID" | "messageID">[] = []
 
         for (const contentItem of result.content) {
           if (contentItem.type === "text") {
             textParts.push(contentItem.text)
           } else if (contentItem.type === "image") {
             attachments.push({
-              id: Identifier.ascending("part"),
-              sessionID: input.session.id,
-              messageID: input.processor.message.id,
               type: "file",
               mime: contentItem.mimeType,
               url: `data:${contentItem.mimeType};base64,${contentItem.data}`,
@@ -917,9 +930,6 @@ export namespace SessionPrompt {
             }
             if (resource.blob) {
               attachments.push({
-                id: Identifier.ascending("part"),
-                sessionID: input.session.id,
-                messageID: input.processor.message.id,
                 type: "file",
                 mime: resource.mimeType ?? "application/octet-stream",
                 url: `data:${resource.mimeType ?? "application/octet-stream"};base64,${resource.blob}`,
@@ -1007,17 +1017,22 @@ export namespace SessionPrompt {
     }
     using _ = defer(() => InstructionPrompt.clear(info.id))
 
+    type Draft<T> = T extends MessageV2.Part ? Omit<T, "id"> & { id?: string } : never
+    const assign = (part: Draft<MessageV2.Part>): MessageV2.Part => ({
+      ...part,
+      id: part.id ?? Identifier.ascending("part"),
+    })
+
     const parts = await Promise.all(
-      input.parts.map(async (part): Promise<MessageV2.Part[]> => {
+      input.parts.map(async (part): Promise<Draft<MessageV2.Part>[]> => {
         if (part.type === "file") {
           // before checking the protocol we check if this is an mcp resource because it needs special handling
           if (part.source?.type === "resource") {
             const { clientName, uri } = part.source
             log.info("mcp resource", { clientName, uri, mime: part.mime })
 
-            const pieces: MessageV2.Part[] = [
+            const pieces: Draft<MessageV2.Part>[] = [
               {
-                id: Identifier.ascending("part"),
                 messageID: info.id,
                 sessionID: input.sessionID,
                 type: "text",
@@ -1040,7 +1055,6 @@ export namespace SessionPrompt {
               for (const content of contents) {
                 if ("text" in content && content.text) {
                   pieces.push({
-                    id: Identifier.ascending("part"),
                     messageID: info.id,
                     sessionID: input.sessionID,
                     type: "text",
@@ -1051,7 +1065,6 @@ export namespace SessionPrompt {
                   // Handle binary content if needed
                   const mimeType = "mimeType" in content ? content.mimeType : part.mime
                   pieces.push({
-                    id: Identifier.ascending("part"),
                     messageID: info.id,
                     sessionID: input.sessionID,
                     type: "text",
@@ -1063,7 +1076,6 @@ export namespace SessionPrompt {
 
               pieces.push({
                 ...part,
-                id: part.id ?? Identifier.ascending("part"),
                 messageID: info.id,
                 sessionID: input.sessionID,
               })
@@ -1071,7 +1083,6 @@ export namespace SessionPrompt {
               log.error("failed to read MCP resource", { error, clientName, uri })
               const message = error instanceof Error ? error.message : String(error)
               pieces.push({
-                id: Identifier.ascending("part"),
                 messageID: info.id,
                 sessionID: input.sessionID,
                 type: "text",
@@ -1088,7 +1099,6 @@ export namespace SessionPrompt {
               if (part.mime === "text/plain") {
                 return [
                   {
-                    id: Identifier.ascending("part"),
                     messageID: info.id,
                     sessionID: input.sessionID,
                     type: "text",
@@ -1096,7 +1106,6 @@ export namespace SessionPrompt {
                     text: `Called the Read tool with the following input: ${JSON.stringify({ filePath: part.filename })}`,
                   },
                   {
-                    id: Identifier.ascending("part"),
                     messageID: info.id,
                     sessionID: input.sessionID,
                     type: "text",
@@ -1105,7 +1114,6 @@ export namespace SessionPrompt {
                   },
                   {
                     ...part,
-                    id: part.id ?? Identifier.ascending("part"),
                     messageID: info.id,
                     sessionID: input.sessionID,
                   },
@@ -1117,11 +1125,9 @@ export namespace SessionPrompt {
               // have to normalize, symbol search returns absolute paths
               // Decode the pathname since URL constructor doesn't automatically decode it
               const filepath = fileURLToPath(part.url)
-              const stat = await Bun.file(filepath)
-                .stat()
-                .catch(() => undefined)
+              const s = Filesystem.stat(filepath)
 
-              if (stat?.isDirectory()) {
+              if (s?.isDirectory()) {
                 part.mime = "application/x-directory"
               }
 
@@ -1162,9 +1168,8 @@ export namespace SessionPrompt {
                 }
                 const args = { filePath: filepath, offset, limit }
 
-                const pieces: MessageV2.Part[] = [
+                const pieces: Draft<MessageV2.Part>[] = [
                   {
-                    id: Identifier.ascending("part"),
                     messageID: info.id,
                     sessionID: input.sessionID,
                     type: "text",
@@ -1188,7 +1193,6 @@ export namespace SessionPrompt {
                     }
                     const result = await t.execute(args, readCtx)
                     pieces.push({
-                      id: Identifier.ascending("part"),
                       messageID: info.id,
                       sessionID: input.sessionID,
                       type: "text",
@@ -1208,7 +1212,6 @@ export namespace SessionPrompt {
                     } else {
                       pieces.push({
                         ...part,
-                        id: part.id ?? Identifier.ascending("part"),
                         messageID: info.id,
                         sessionID: input.sessionID,
                       })
@@ -1224,7 +1227,6 @@ export namespace SessionPrompt {
                       }).toObject(),
                     })
                     pieces.push({
-                      id: Identifier.ascending("part"),
                       messageID: info.id,
                       sessionID: input.sessionID,
                       type: "text",
@@ -1251,7 +1253,6 @@ export namespace SessionPrompt {
                 const result = await ReadTool.init().then((t) => t.execute(args, listCtx))
                 return [
                   {
-                    id: Identifier.ascending("part"),
                     messageID: info.id,
                     sessionID: input.sessionID,
                     type: "text",
@@ -1259,7 +1260,6 @@ export namespace SessionPrompt {
                     text: `Called the Read tool with the following input: ${JSON.stringify(args)}`,
                   },
                   {
-                    id: Identifier.ascending("part"),
                     messageID: info.id,
                     sessionID: input.sessionID,
                     type: "text",
@@ -1268,30 +1268,27 @@ export namespace SessionPrompt {
                   },
                   {
                     ...part,
-                    id: part.id ?? Identifier.ascending("part"),
                     messageID: info.id,
                     sessionID: input.sessionID,
                   },
                 ]
               }
 
-              const file = Bun.file(filepath)
               FileTime.read(input.sessionID, filepath)
               return [
                 {
-                  id: Identifier.ascending("part"),
                   messageID: info.id,
                   sessionID: input.sessionID,
                   type: "text",
-                  text: `Called the Read tool with the following input: {\"filePath\":\"${filepath}\"}`,
+                  text: `Called the Read tool with the following input: {"filePath":"${filepath}"}`,
                   synthetic: true,
                 },
                 {
-                  id: part.id ?? Identifier.ascending("part"),
+                  id: part.id,
                   messageID: info.id,
                   sessionID: input.sessionID,
                   type: "file",
-                  url: `data:${part.mime};base64,` + Buffer.from(await file.bytes()).toString("base64"),
+                  url: `data:${part.mime};base64,` + (await Filesystem.readBytes(filepath)).toString("base64"),
                   mime: part.mime,
                   filename: part.filename!,
                   source: part.source,
@@ -1306,13 +1303,11 @@ export namespace SessionPrompt {
           const hint = perm.action === "deny" ? " . Invoked by user; guaranteed to exist." : ""
           return [
             {
-              id: Identifier.ascending("part"),
               ...part,
               messageID: info.id,
               sessionID: input.sessionID,
             },
             {
-              id: Identifier.ascending("part"),
               messageID: info.id,
               sessionID: input.sessionID,
               type: "text",
@@ -1329,14 +1324,13 @@ export namespace SessionPrompt {
 
         return [
           {
-            id: Identifier.ascending("part"),
             ...part,
             messageID: info.id,
             sessionID: input.sessionID,
           },
         ]
       }),
-    ).then((x) => x.flat())
+    ).then((x) => x.flat().map(assign))
 
     await Plugin.trigger(
       "chat.message",
@@ -1402,7 +1396,7 @@ export namespace SessionPrompt {
     // Switching from plan mode to build mode
     if (input.agent.name !== "plan" && assistantMessage?.info.agent === "plan") {
       const plan = Session.plan(input.session)
-      const exists = await Bun.file(plan).exists()
+      const exists = await Filesystem.exists(plan)
       if (exists) {
         const part = await Session.updatePart({
           id: Identifier.ascending("part"),
@@ -1421,7 +1415,7 @@ export namespace SessionPrompt {
     // Entering plan mode
     if (input.agent.name === "plan" && assistantMessage?.info.agent !== "plan") {
       const plan = Session.plan(input.session)
-      const exists = await Bun.file(plan).exists()
+      const exists = await Filesystem.exists(plan)
       if (!exists) await fs.mkdir(path.dirname(plan), { recursive: true })
       const part = await Session.updatePart({
         id: Identifier.ascending("part"),
@@ -1666,7 +1660,11 @@ NOTE: At any point in time through this workflow you should feel free to ask the
     const args = matchingInvocation?.args
 
     const cwd = Instance.directory
-    const shellEnv = await Plugin.trigger("shell.env", { cwd }, { env: {} })
+    const shellEnv = await Plugin.trigger(
+      "shell.env",
+      { cwd, sessionID: input.sessionID, callID: part.callID },
+      { env: {} },
+    )
     const proc = spawn(shell, args, {
       cwd,
       detached: process.platform !== "win32",

packages/opencode/src/shell/shell.ts

@@ -1,5 +1,6 @@
 import { Flag } from "@/flag/flag"
 import { lazy } from "@/util/lazy"
+import { Filesystem } from "@/util/filesystem"
 import path from "path"
 import { spawn, type ChildProcess } from "child_process"
 
@@ -43,7 +44,7 @@ export namespace Shell {
         // git.exe is typically at: C:\Program Files\Git\cmd\git.exe
         // bash.exe is at: C:\Program Files\Git\bin\bash.exe
         const bash = path.join(git, "..", "..", "bin", "bash.exe")
-        if (Bun.file(bash).size) return bash
+        if (Filesystem.stat(bash)?.size) return bash
       }
       return process.env.COMSPEC || "cmd.exe"
     }

packages/opencode/src/skill/discovery.ts

@@ -2,6 +2,7 @@ import path from "path"
 import { mkdir } from "fs/promises"
 import { Log } from "../util/log"
 import { Global } from "../global"
+import { Filesystem } from "../util/filesystem"
 
 export namespace Discovery {
   const log = Log.create({ service: "skill-discovery" })
@@ -19,14 +20,14 @@ export namespace Discovery {
   }
 
   async function get(url: string, dest: string): Promise<boolean> {
-    if (await Bun.file(dest).exists()) return true
+    if (await Filesystem.exists(dest)) return true
     return fetch(url)
       .then(async (response) => {
         if (!response.ok) {
           log.error("failed to download", { url, status: response.status })
           return false
         }
-        await Bun.write(dest, await response.text())
+        if (response.body) await Filesystem.writeStream(dest, response.body)
         return true
       })
       .catch((err) => {
@@ -88,7 +89,7 @@ export namespace Discovery {
         )
 
         const md = path.join(root, "SKILL.md")
-        if (await Bun.file(md).exists()) result.push(root)
+        if (await Filesystem.exists(md)) result.push(root)
       }),
     )
 

packages/opencode/src/skill/skill.ts

@@ -12,6 +12,7 @@ import { Flag } from "@/flag/flag"
 import { Bus } from "@/bus"
 import { Session } from "@/session"
 import { Discovery } from "./discovery"
+import { Glob } from "../util/glob"
 
 import { KilocodePaths } from "../kilocode/paths" // kilocode_change
 
@@ -46,10 +47,9 @@ export namespace Skill {
   // External skill directories to search for (project-level and global)
   // These follow the directory layout used by Claude Code and other agents.
   const EXTERNAL_DIRS = [".claude", ".agents"]
-  const EXTERNAL_SKILL_GLOB = new Bun.Glob("skills/**/SKILL.md")
-
-  const KILO_SKILL_GLOB = new Bun.Glob("{skill,skills}/**/SKILL.md")
-  const SKILL_GLOB = new Bun.Glob("**/SKILL.md")
+  const EXTERNAL_SKILL_PATTERN = "skills/**/SKILL.md"
+  const KILO_SKILL_PATTERN = "{skill,skills}/**/SKILL.md"
+  const SKILL_PATTERN = "**/SKILL.md"
 
   export const state = Instance.state(async () => {
     const skills: Record<string, Info> = {}
@@ -90,15 +90,13 @@ export namespace Skill {
     }
 
     const scanExternal = async (root: string, scope: "global" | "project") => {
-      return Array.fromAsync(
-        EXTERNAL_SKILL_GLOB.scan({
-          cwd: root,
-          absolute: true,
-          onlyFiles: true,
-          followSymlinks: true,
-          dot: true,
-        }),
-      )
+      return Glob.scan(EXTERNAL_SKILL_PATTERN, {
+        cwd: root,
+        absolute: true,
+        include: "file",
+        dot: true,
+        symlink: true,
+      })
         .then((matches) => Promise.all(matches.map(addSkill)))
         .catch((error) => {
           log.error(`failed to scan ${scope} skills`, { dir: root, error })
@@ -131,12 +129,11 @@ export namespace Skill {
     })
     for (const dir of kilocodeSkillDirs) {
       const matches = await Array.fromAsync(
-        KILO_SKILL_GLOB.scan({
+        await Glob.scan(KILO_SKILL_PATTERN, {
           cwd: dir,
           absolute: true,
-          onlyFiles: true,
-          followSymlinks: true,
-          dot: true,
+          include: "file",
+          symlink: true,
         }),
       ).catch((error) => {
         log.error("failed .kilocode directory scan for skills", { dir, error })
@@ -151,12 +148,13 @@ export namespace Skill {
 
     // Scan .opencode/skill/ directories
     for (const dir of await Config.directories()) {
-      for await (const match of KILO_SKILL_GLOB.scan({
+      const matches = await Glob.scan(KILO_SKILL_PATTERN, {
         cwd: dir,
         absolute: true,
-        onlyFiles: true,
-        followSymlinks: true,
-      })) {
+        include: "file",
+        symlink: true,
+      })
+      for (const match of matches) {
         await addSkill(match)
       }
     }
@@ -170,12 +168,13 @@ export namespace Skill {
         log.warn("skill path not found", { path: resolved })
         continue
       }
-      for await (const match of SKILL_GLOB.scan({
+      const matches = await Glob.scan(SKILL_PATTERN, {
         cwd: resolved,
         absolute: true,
-        onlyFiles: true,
-        followSymlinks: true,
-      })) {
+        include: "file",
+        symlink: true,
+      })
+      for (const match of matches) {
         await addSkill(match)
       }
     }
@@ -185,12 +184,13 @@ export namespace Skill {
       const list = await Discovery.pull(url)
       for (const dir of list) {
         dirs.add(dir)
-        for await (const match of SKILL_GLOB.scan({
+        const matches = await Glob.scan(SKILL_PATTERN, {
           cwd: dir,
           absolute: true,
-          onlyFiles: true,
-          followSymlinks: true,
-        })) {
+          include: "file",
+          symlink: true,
+        })
+        for (const match of matches) {
           await addSkill(match)
         }
       }

packages/opencode/src/storage/db.ts

@@ -10,7 +10,7 @@ import { Log } from "../util/log"
 import { NamedError } from "@opencode-ai/util/error"
 import z from "zod"
 import path from "path"
-import { readFileSync, readdirSync } from "fs"
+import { readFileSync, readdirSync, existsSync } from "fs"
 import * as schema from "./schema"
 
 declare const KILO_MIGRATIONS: { sql: string; timestamp: number }[] | undefined
@@ -54,7 +54,7 @@ export namespace Database {
     const sql = dirs
       .map((name) => {
         const file = path.join(dir, name, "migration.sql")
-        if (!Bun.file(file).size) return
+        if (!existsSync(file)) return
         return {
           sql: readFileSync(file, "utf-8"),
           timestamp: time(name),

packages/opencode/src/storage/json-migration.ts

@@ -7,6 +7,8 @@ import { SessionTable, MessageTable, PartTable, TodoTable, PermissionTable } fro
 import { SessionShareTable } from "../share/share.sql"
 import path from "path"
 import { existsSync } from "fs"
+import { Filesystem } from "../util/filesystem"
+import { Glob } from "../util/glob"
 
 export namespace JsonMigration {
   const log = Log.create({ service: "json-migration" })
@@ -70,19 +72,14 @@ export namespace JsonMigration {
     const now = Date.now()
 
     async function list(pattern: string) {
-      const items: string[] = []
-      const scan = new Bun.Glob(pattern)
-      for await (const file of scan.scan({ cwd: storageDir, absolute: true })) {
-        items.push(file)
-      }
-      return items
+      return Glob.scan(pattern, { cwd: storageDir, absolute: true })
     }
 
     async function read(files: string[], start: number, end: number) {
       const count = end - start
       const tasks = new Array(count)
       for (let i = 0; i < count; i++) {
-        tasks[i] = Bun.file(files[start + i]).json()
+        tasks[i] = Filesystem.readJson(files[start + i])
       }
       const results = await Promise.allSettled(tasks)
       const items = new Array(count)

packages/opencode/src/storage/storage.ts

@@ -8,6 +8,7 @@ import { Lock } from "../util/lock"
 import { $ } from "bun"
 import { NamedError } from "@opencode-ai/util/error"
 import z from "zod"
+import { Glob } from "../util/glob"
 
 export namespace Storage {
   const log = Log.create({ service: "storage" })
@@ -25,21 +26,24 @@ export namespace Storage {
     async (dir) => {
       const project = path.resolve(dir, "../project")
       if (!(await Filesystem.isDir(project))) return
-      for await (const projectDir of new Bun.Glob("*").scan({
+      const projectDirs = await Glob.scan("*", {
         cwd: project,
-        onlyFiles: false,
-      })) {
+        include: "all",
+      })
+      for (const projectDir of projectDirs) {
+        const fullPath = path.join(project, projectDir)
+        if (!(await Filesystem.isDir(fullPath))) continue
         log.info(`migrating project ${projectDir}`)
         let projectID = projectDir
         const fullProjectDir = path.join(project, projectDir)
         let worktree = "/"
 
         if (projectID !== "global") {
-          for await (const msgFile of new Bun.Glob("storage/session/message/*/*.json").scan({
+          for (const msgFile of await Glob.scan("storage/session/message/*/*.json", {
             cwd: path.join(project, projectDir),
             absolute: true,
           })) {
-            const json = await Bun.file(msgFile).json()
+            const json = await Filesystem.readJson<any>(msgFile)
             worktree = json.path?.root
             if (worktree) break
           }
@@ -60,21 +64,18 @@ export namespace Storage {
           if (!id) continue
           projectID = id
 
-          await Bun.write(
-            path.join(dir, "project", projectID + ".json"),
-            JSON.stringify({
-              id,
-              vcs: "git",
-              worktree,
-              time: {
-                created: Date.now(),
-                initialized: Date.now(),
-              },
-            }),
-          )
+          await Filesystem.writeJson(path.join(dir, "project", projectID + ".json"), {
+            id,
+            vcs: "git",
+            worktree,
+            time: {
+              created: Date.now(),
+              initialized: Date.now(),
+            },
+          })
 
           log.info(`migrating sessions for project ${projectID}`)
-          for await (const sessionFile of new Bun.Glob("storage/session/info/*.json").scan({
+          for (const sessionFile of await Glob.scan("storage/session/info/*.json", {
             cwd: fullProjectDir,
             absolute: true,
           })) {
@@ -83,10 +84,10 @@ export namespace Storage {
               sessionFile,
               dest,
             })
-            const session = await Bun.file(sessionFile).json()
-            await Bun.write(dest, JSON.stringify(session))
+            const session = await Filesystem.readJson<any>(sessionFile)
+            await Filesystem.writeJson(dest, session)
             log.info(`migrating messages for session ${session.id}`)
-            for await (const msgFile of new Bun.Glob(`storage/session/message/${session.id}/*.json`).scan({
+            for (const msgFile of await Glob.scan(`storage/session/message/${session.id}/*.json`, {
               cwd: fullProjectDir,
               absolute: true,
             })) {
@@ -95,23 +96,21 @@ export namespace Storage {
                 msgFile,
                 dest,
               })
-              const message = await Bun.file(msgFile).json()
-              await Bun.write(dest, JSON.stringify(message))
+              const message = await Filesystem.readJson<any>(msgFile)
+              await Filesystem.writeJson(dest, message)
 
               log.info(`migrating parts for message ${message.id}`)
-              for await (const partFile of new Bun.Glob(`storage/session/part/${session.id}/${message.id}/*.json`).scan(
-                {
-                  cwd: fullProjectDir,
-                  absolute: true,
-                },
-              )) {
+              for (const partFile of await Glob.scan(`storage/session/part/${session.id}/${message.id}/*.json`, {
+                cwd: fullProjectDir,
+                absolute: true,
+              })) {
                 const dest = path.join(dir, "part", message.id, path.basename(partFile))
-                const part = await Bun.file(partFile).json()
+                const part = await Filesystem.readJson(partFile)
                 log.info("copying", {
                   partFile,
                   dest,
                 })
-                await Bun.write(dest, JSON.stringify(part))
+                await Filesystem.writeJson(dest, part)
               }
             }
           }
@@ -119,39 +118,36 @@ export namespace Storage {
       }
     },
     async (dir) => {
-      for await (const item of new Bun.Glob("session/*/*.json").scan({
+      for (const item of await Glob.scan("session/*/*.json", {
         cwd: dir,
         absolute: true,
       })) {
-        const session = await Bun.file(item).json()
+        const session = await Filesystem.readJson<any>(item)
         if (!session.projectID) continue
         if (!session.summary?.diffs) continue
         const { diffs } = session.summary
-        await Bun.file(path.join(dir, "session_diff", session.id + ".json")).write(JSON.stringify(diffs))
-        await Bun.file(path.join(dir, "session", session.projectID, session.id + ".json")).write(
-          JSON.stringify({
-            ...session,
-            summary: {
-              additions: diffs.reduce((sum: any, x: any) => sum + x.additions, 0),
-              deletions: diffs.reduce((sum: any, x: any) => sum + x.deletions, 0),
-            },
-          }),
-        )
+        await Filesystem.write(path.join(dir, "session_diff", session.id + ".json"), JSON.stringify(diffs))
+        await Filesystem.writeJson(path.join(dir, "session", session.projectID, session.id + ".json"), {
+          ...session,
+          summary: {
+            additions: diffs.reduce((sum: any, x: any) => sum + x.additions, 0),
+            deletions: diffs.reduce((sum: any, x: any) => sum + x.deletions, 0),
+          },
+        })
       }
     },
   ]
 
   const state = lazy(async () => {
     const dir = path.join(Global.Path.data, "storage")
-    const migration = await Bun.file(path.join(dir, "migration"))
-      .json()
+    const migration = await Filesystem.readJson<string>(path.join(dir, "migration"))
       .then((x) => parseInt(x))
       .catch(() => 0)
     for (let index = migration; index < MIGRATIONS.length; index++) {
       log.info("running migration", { index })
       const migration = MIGRATIONS[index]
       await migration(dir).catch(() => log.error("failed to run migration", { index }))
-      await Bun.write(path.join(dir, "migration"), (index + 1).toString())
+      await Filesystem.write(path.join(dir, "migration"), (index + 1).toString())
     }
     return {
       dir,
@@ -171,7 +167,7 @@ export namespace Storage {
     const target = path.join(dir, ...key) + ".json"
     return withErrorHandling(async () => {
       using _ = await Lock.read(target)
-      const result = await Bun.file(target).json()
+      const result = await Filesystem.readJson<T>(target)
       return result as T
     })
   }
@@ -181,10 +177,10 @@ export namespace Storage {
     const target = path.join(dir, ...key) + ".json"
     return withErrorHandling(async () => {
       using _ = await Lock.write(target)
-      const content = await Bun.file(target).json()
-      fn(content)
-      await Bun.write(target, JSON.stringify(content, null, 2))
-      return content as T
+      const content = await Filesystem.readJson<T>(target)
+      fn(content as T)
+      await Filesystem.writeJson(target, content)
+      return content
     })
   }
 
@@ -193,7 +189,7 @@ export namespace Storage {
     const target = path.join(dir, ...key) + ".json"
     return withErrorHandling(async () => {
       using _ = await Lock.write(target)
-      await Bun.write(target, JSON.stringify(content, null, 2))
+      await Filesystem.writeJson(target, content)
     })
   }
 
@@ -208,16 +204,13 @@ export namespace Storage {
     })
   }
 
-  const glob = new Bun.Glob("**/*")
   export async function list(prefix: string[]) {
     const dir = await state().then((x) => x.dir)
     try {
-      const result = await Array.fromAsync(
-        glob.scan({
-          cwd: path.join(dir, ...prefix),
-          onlyFiles: true,
-        }),
-      ).then((results) => results.map((x) => [...prefix, ...x.slice(0, -5).split(path.sep)]))
+      const result = await Glob.scan("**/*", {
+        cwd: path.join(dir, ...prefix),
+        include: "file",
+      }).then((results) => results.map((x) => [...prefix, ...x.slice(0, -5).split(path.sep)]))
       result.sort()
       return result
     } catch {

packages/opencode/src/tool/bash.ts

@@ -163,7 +163,11 @@ export const BashTool = Tool.define("bash", async () => {
         })
       }
 
-      const shellEnv = await Plugin.trigger("shell.env", { cwd }, { env: {} })
+      const shellEnv = await Plugin.trigger(
+        "shell.env",
+        { cwd, sessionID: ctx.sessionID, callID: ctx.callID },
+        { env: {} },
+      )
       const proc = spawn(params.command, {
         shell,
         cwd,

packages/opencode/src/tool/batch.ts

@@ -77,6 +77,12 @@ export const BatchTool = Tool.define("batch", async () => {
           })
 
           const result = await tool.execute(validatedParams, { ...ctx, callID: partID })
+          const attachments = result.attachments?.map((attachment) => ({
+            ...attachment,
+            id: Identifier.ascending("part"),
+            sessionID: ctx.sessionID,
+            messageID: ctx.messageID,
+          }))
 
           await Session.updatePart({
             id: partID,
@@ -91,7 +97,7 @@ export const BatchTool = Tool.define("batch", async () => {
               output: result.output,
               title: result.title,
               metadata: result.metadata,
-              attachments: result.attachments,
+              attachments,
               time: {
                 start: callStartTime,
                 end: Date.now(),

packages/opencode/src/tool/edit.ts

@@ -49,7 +49,7 @@ export const EditTool = Tool.define("edit", {
     let contentNew = ""
     await FileTime.withLock(filePath, async () => {
       if (params.oldString === "") {
-        const existed = await Bun.file(filePath).exists()
+        const existed = await Filesystem.exists(filePath)
         contentNew = params.newString
         diff = trimDiff(createTwoFilesPatch(filePath, filePath, contentOld, contentNew))
         await ctx.ask({
@@ -61,7 +61,7 @@ export const EditTool = Tool.define("edit", {
             diff,
           },
         })
-        await Bun.write(filePath, params.newString)
+        await Filesystem.write(filePath, params.newString)
         await Bus.publish(File.Event.Edited, {
           file: filePath,
         })
@@ -73,12 +73,11 @@ export const EditTool = Tool.define("edit", {
         return
       }
 
-      const file = Bun.file(filePath)
-      const stats = await file.stat().catch(() => {})
+      const stats = Filesystem.stat(filePath)
       if (!stats) throw new Error(`File ${filePath} not found`)
       if (stats.isDirectory()) throw new Error(`Path is a directory, not a file: ${filePath}`)
       await FileTime.assert(ctx.sessionID, filePath)
-      contentOld = await file.text()
+      contentOld = await Filesystem.readText(filePath)
       contentNew = replace(contentOld, params.oldString, params.newString, params.replaceAll)
 
       diff = trimDiff(
@@ -94,7 +93,7 @@ export const EditTool = Tool.define("edit", {
         },
       })
 
-      await file.write(contentNew)
+      await Filesystem.write(filePath, contentNew)
       await Bus.publish(File.Event.Edited, {
         file: filePath,
       })
@@ -102,7 +101,7 @@ export const EditTool = Tool.define("edit", {
         file: filePath,
         event: "change",
       })
-      contentNew = await file.text()
+      contentNew = await Filesystem.readText(filePath)
       diff = trimDiff(
         createTwoFilesPatch(filePath, filePath, normalizeLineEndings(contentOld), normalizeLineEndings(contentNew)),
       )

packages/opencode/src/tool/glob.ts

@@ -1,6 +1,7 @@
 import z from "zod"
 import path from "path"
 import { Tool } from "./tool"
+import { Filesystem } from "../util/filesystem"
 import DESCRIPTION from "./glob.txt"
 import { Ripgrep } from "../file/ripgrep"
 import { Instance } from "../project/instance"
@@ -45,10 +46,7 @@ export const GlobTool = Tool.define("glob", {
         break
       }
       const full = path.resolve(search, file)
-      const stats = await Bun.file(full)
-        .stat()
-        .then((x) => x.mtime.getTime())
-        .catch(() => 0)
+      const stats = Filesystem.stat(full)?.mtime.getTime() ?? 0
       files.push({
         path: full,
         mtime: stats,

packages/opencode/src/tool/grep.ts

@@ -1,5 +1,6 @@
 import z from "zod"
 import { Tool } from "./tool"
+import { Filesystem } from "../util/filesystem"
 import { Ripgrep } from "../file/ripgrep"
 
 import DESCRIPTION from "./grep.txt"
@@ -83,8 +84,7 @@ export const GrepTool = Tool.define("grep", {
       const lineNum = parseInt(lineNumStr, 10)
       const lineText = lineTextParts.join("|")
 
-      const file = Bun.file(filePath)
-      const stats = await file.stat().catch(() => null)
+      const stats = Filesystem.stat(filePath)
       if (!stats) continue
 
       matches.push({

packages/opencode/src/tool/lsp.ts

@@ -6,6 +6,7 @@ import DESCRIPTION from "./lsp.txt"
 import { Instance } from "../project/instance"
 import { pathToFileURL } from "url"
 import { assertExternalDirectory } from "./external-directory"
+import { Filesystem } from "../util/filesystem"
 
 const operations = [
   "goToDefinition",
@@ -47,7 +48,7 @@ export const LspTool = Tool.define("lsp", {
     const relPath = path.relative(Instance.worktree, file)
     const title = `${args.operation} ${relPath}:${args.line}:${args.character}`
 
-    const exists = await Bun.file(file).exists()
+    const exists = await Filesystem.exists(file)
     if (!exists) {
       throw new Error(`File not found: ${file}`)
     }

packages/opencode/src/tool/read.ts

@@ -1,18 +1,22 @@
 import z from "zod"
-import * as fs from "fs"
+import { createReadStream } from "fs"
+import * as fs from "fs/promises"
 import * as path from "path"
+import { createInterface } from "readline"
 import { Tool } from "./tool"
 import { LSP } from "../lsp"
 import { FileTime } from "../file/time"
 import DESCRIPTION from "./read.txt"
 import { Instance } from "../project/instance"
-import { Identifier } from "../id/id"
 import { assertExternalDirectory } from "./external-directory"
 import { InstructionPrompt } from "../session/instruction"
+import { Filesystem } from "../util/filesystem"
 
 const DEFAULT_READ_LIMIT = 2000
 const MAX_LINE_LENGTH = 2000
+const MAX_LINE_SUFFIX = `... (line truncated to ${MAX_LINE_LENGTH} chars)`
 const MAX_BYTES = 50 * 1024
+const MAX_BYTES_LABEL = `${MAX_BYTES / 1024} KB`
 
 export const ReadTool = Tool.define("read", {
   description: DESCRIPTION,
@@ -31,8 +35,7 @@ export const ReadTool = Tool.define("read", {
     }
     const title = path.relative(Instance.worktree, filepath)
 
-    const file = Bun.file(filepath)
-    const stat = await file.stat().catch(() => undefined)
+    const stat = Filesystem.stat(filepath)
 
     await assertExternalDirectory(ctx, filepath, {
       bypass: Boolean(ctx.extra?.["bypassCwdCheck"]),
@@ -50,14 +53,18 @@ export const ReadTool = Tool.define("read", {
       const dir = path.dirname(filepath)
       const base = path.basename(filepath)
 
-      const dirEntries = fs.readdirSync(dir)
-      const suggestions = dirEntries
-        .filter(
-          (entry) =>
-            entry.toLowerCase().includes(base.toLowerCase()) || base.toLowerCase().includes(entry.toLowerCase()),
+      const suggestions = await fs
+        .readdir(dir)
+        .then((entries) =>
+          entries
+            .filter(
+              (entry) =>
+                entry.toLowerCase().includes(base.toLowerCase()) || base.toLowerCase().includes(entry.toLowerCase()),
+            )
+            .map((entry) => path.join(dir, entry))
+            .slice(0, 3),
         )
-        .map((entry) => path.join(dir, entry))
-        .slice(0, 3)
+        .catch(() => [])
 
       if (suggestions.length > 0) {
         throw new Error(`File not found: ${filepath}\n\nDid you mean one of these?\n${suggestions.join("\n")}`)
@@ -67,12 +74,12 @@ export const ReadTool = Tool.define("read", {
     }
 
     if (stat.isDirectory()) {
-      const dirents = await fs.promises.readdir(filepath, { withFileTypes: true })
+      const dirents = await fs.readdir(filepath, { withFileTypes: true })
       const entries = await Promise.all(
         dirents.map(async (dirent) => {
           if (dirent.isDirectory()) return dirent.name + "/"
           if (dirent.isSymbolicLink()) {
-            const target = await fs.promises.stat(path.join(filepath, dirent.name)).catch(() => undefined)
+            const target = await fs.stat(path.join(filepath, dirent.name)).catch(() => undefined)
             if (target?.isDirectory()) return dirent.name + "/"
           }
           return dirent.name
@@ -111,11 +118,10 @@ export const ReadTool = Tool.define("read", {
     const instructions = await InstructionPrompt.resolve(ctx.messages, filepath, ctx.messageID)
 
     // Exclude SVG (XML-based) and vnd.fastbidsheet (.fbs extension, commonly FlatBuffers schema files)
-    const isImage =
-      file.type.startsWith("image/") && file.type !== "image/svg+xml" && file.type !== "image/vnd.fastbidsheet"
-    const isPdf = file.type === "application/pdf"
+    const mime = Filesystem.mimeType(filepath)
+    const isImage = mime.startsWith("image/") && mime !== "image/svg+xml" && mime !== "image/vnd.fastbidsheet"
+    const isPdf = mime === "application/pdf"
     if (isImage || isPdf) {
-      const mime = file.type
       const msg = `${isImage ? "Image" : "PDF"} read successfully`
       return {
         title,
@@ -127,38 +133,61 @@ export const ReadTool = Tool.define("read", {
         },
         attachments: [
           {
-            id: Identifier.ascending("part"),
-            sessionID: ctx.sessionID,
-            messageID: ctx.messageID,
             type: "file",
             mime,
-            url: `data:${mime};base64,${Buffer.from(await file.bytes()).toString("base64")}`,
+            url: `data:${mime};base64,${Buffer.from(await Filesystem.readBytes(filepath)).toString("base64")}`,
           },
         ],
       }
     }
 
-    const isBinary = await isBinaryFile(filepath, file)
+    const isBinary = await isBinaryFile(filepath, Number(stat.size))
     if (isBinary) throw new Error(`Cannot read binary file: ${filepath}`)
 
+    const stream = createReadStream(filepath, { encoding: "utf8" })
+    const rl = createInterface({
+      input: stream,
+      // Note: we use the crlfDelay option to recognize all instances of CR LF
+      // ('\r\n') in file as a single line break.
+      crlfDelay: Infinity,
+    })
+
     const limit = params.limit ?? DEFAULT_READ_LIMIT
     const offset = params.offset ?? 1
     const start = offset - 1
-    const lines = await file.text().then((text) => text.split("\n"))
-    if (start >= lines.length) throw new Error(`Offset ${offset} is out of range for this file (${lines.length} lines)`)
-
     const raw: string[] = []
     let bytes = 0
+    let lines = 0
     let truncatedByBytes = false
-    for (let i = start; i < Math.min(lines.length, start + limit); i++) {
-      const line = lines[i].length > MAX_LINE_LENGTH ? lines[i].substring(0, MAX_LINE_LENGTH) + "..." : lines[i]
-      const size = Buffer.byteLength(line, "utf-8") + (raw.length > 0 ? 1 : 0)
-      if (bytes + size > MAX_BYTES) {
-        truncatedByBytes = true
-        break
+    let hasMoreLines = false
+    try {
+      for await (const text of rl) {
+        lines += 1
+        if (lines <= start) continue
+
+        if (raw.length >= limit) {
+          hasMoreLines = true
+          continue
+        }
+
+        const line = text.length > MAX_LINE_LENGTH ? text.substring(0, MAX_LINE_LENGTH) + MAX_LINE_SUFFIX : text
+        const size = Buffer.byteLength(line, "utf-8") + (raw.length > 0 ? 1 : 0)
+        if (bytes + size > MAX_BYTES) {
+          truncatedByBytes = true
+          hasMoreLines = true
+          break
+        }
+
+        raw.push(line)
+        bytes += size
       }
-      raw.push(line)
-      bytes += size
+    } finally {
+      rl.close()
+      stream.destroy()
+    }
+
+    if (lines < offset && !(lines === 0 && offset === 1)) {
+      throw new Error(`Offset ${offset} is out of range for this file (${lines} lines)`)
     }
 
     const content = raw.map((line, index) => {
@@ -169,15 +198,15 @@ export const ReadTool = Tool.define("read", {
     let output = [`<path>${filepath}</path>`, `<type>file</type>`, "<content>"].join("\n")
     output += content.join("\n")
 
-    const totalLines = lines.length
+    const totalLines = lines
     const lastReadLine = offset + raw.length - 1
-    const hasMoreLines = totalLines > lastReadLine
+    const nextOffset = lastReadLine + 1
     const truncated = hasMoreLines || truncatedByBytes
 
     if (truncatedByBytes) {
-      output += `\n\n(Output truncated at ${MAX_BYTES} bytes. Use 'offset' parameter to read beyond line ${lastReadLine})`
+      output += `\n\n(Output capped at ${MAX_BYTES_LABEL}. Showing lines ${offset}-${lastReadLine}. Use offset=${nextOffset} to continue.)`
     } else if (hasMoreLines) {
-      output += `\n\n(File has more lines. Use 'offset' parameter to read beyond line ${lastReadLine})`
+      output += `\n\n(Showing lines ${offset}-${lastReadLine} of ${totalLines}. Use offset=${nextOffset} to continue.)`
     } else {
       output += `\n\n(End of file - total ${totalLines} lines)`
     }
@@ -203,7 +232,7 @@ export const ReadTool = Tool.define("read", {
   },
 })
 
-async function isBinaryFile(filepath: string, file: Bun.BunFile): Promise<boolean> {
+async function isBinaryFile(filepath: string, fileSize: number): Promise<boolean> {
   const ext = path.extname(filepath).toLowerCase()
   // binary check for common non-text extensions
   switch (ext) {
@@ -240,22 +269,25 @@ async function isBinaryFile(filepath: string, file: Bun.BunFile): Promise<boolea
       break
   }
 
-  const stat = await file.stat()
-  const fileSize = stat.size
   if (fileSize === 0) return false
 
-  const bufferSize = Math.min(4096, fileSize)
-  const buffer = await file.arrayBuffer()
-  if (buffer.byteLength === 0) return false
-  const bytes = new Uint8Array(buffer.slice(0, bufferSize))
+  const fh = await fs.open(filepath, "r")
+  try {
+    const sampleSize = Math.min(4096, fileSize)
+    const bytes = Buffer.alloc(sampleSize)
+    const result = await fh.read(bytes, 0, sampleSize, 0)
+    if (result.bytesRead === 0) return false
 
-  let nonPrintableCount = 0
-  for (let i = 0; i < bytes.length; i++) {
-    if (bytes[i] === 0) return true
-    if (bytes[i] < 9 || (bytes[i] > 13 && bytes[i] < 32)) {
-      nonPrintableCount++
+    let nonPrintableCount = 0
+    for (let i = 0; i < result.bytesRead; i++) {
+      if (bytes[i] === 0) return true
+      if (bytes[i] < 9 || (bytes[i] > 13 && bytes[i] < 32)) {
+        nonPrintableCount++
+      }
     }
+    // If >30% non-printable characters, consider it binary
+    return nonPrintableCount / result.bytesRead > 0.3
+  } finally {
+    await fh.close()
   }
-  // If >30% non-printable characters, consider it binary
-  return nonPrintableCount / bytes.length > 0.3
 }

packages/opencode/src/tool/registry.ts

@@ -27,16 +27,18 @@ import { LspTool } from "./lsp"
 import { Truncate } from "./truncation"
 import { PlanExitTool, PlanEnterTool } from "./plan"
 import { ApplyPatchTool } from "./apply_patch"
+import { Glob } from "../util/glob"
 
 export namespace ToolRegistry {
   const log = Log.create({ service: "tool.registry" })
 
   export const state = Instance.state(async () => {
     const custom = [] as Tool.Info[]
-    const glob = new Bun.Glob("{tool,tools}/*.{js,ts}")
 
     const matches = await Config.directories().then((dirs) =>
-      dirs.flatMap((dir) => [...glob.scanSync({ cwd: dir, absolute: true, followSymlinks: true, dot: true })]),
+      dirs.flatMap((dir) =>
+        Glob.scanSync("{tool,tools}/*.{js,ts}", { cwd: dir, absolute: true, dot: true, symlink: true }),
+      ),
     )
     if (matches.length) await Config.waitForDependencies()
     for (const match of matches) {
@@ -94,10 +96,11 @@ export namespace ToolRegistry {
   async function all(): Promise<Tool.Info[]> {
     const custom = await state().then((x) => x.custom)
     const config = await Config.get()
+    const question = ["app", "cli", "desktop"].includes(Flag.OPENCODE_CLIENT) || Flag.OPENCODE_ENABLE_QUESTION_TOOL
 
     return [
       InvalidTool,
-      ...(["app", "cli", "desktop", "vscode"].includes(Flag.KILO_CLIENT) ? [QuestionTool] : []), // kilocode_change
+      ...(["app", "cli", "desktop", "vscode"].includes(Flag.KILO_CLIENT) && question ? [QuestionTool] : []), // kilocode_change
       BashTool,
       ReadTool,
       GlobTool,

packages/opencode/src/tool/tool.ts

@@ -36,7 +36,7 @@ export namespace Tool {
         title: string
         metadata: M
         output: string
-        attachments?: MessageV2.FilePart[]
+        attachments?: Omit<MessageV2.FilePart, "id" | "sessionID" | "messageID">[]
       }>
       formatValidationError?(error: z.ZodError): string
     }>

packages/opencode/src/tool/truncation.ts

@@ -5,6 +5,8 @@ import { Identifier } from "../id/id"
 import { PermissionNext } from "../permission/next"
 import type { Agent } from "../agent/agent"
 import { Scheduler } from "../scheduler"
+import { Filesystem } from "../util/filesystem"
+import { Glob } from "../util/glob"
 
 export namespace Truncate {
   export const MAX_LINES = 2000
@@ -33,8 +35,7 @@ export namespace Truncate {
 
   export async function cleanup() {
     const cutoff = Identifier.timestamp(Identifier.create("tool", false, Date.now() - RETENTION_MS))
-    const glob = new Bun.Glob("tool_*")
-    const entries = await Array.fromAsync(glob.scan({ cwd: DIR, onlyFiles: true })).catch(() => [] as string[])
+    const entries = await Glob.scan("tool_*", { cwd: DIR, include: "file" }).catch(() => [] as string[])
     for (const entry of entries) {
       if (Identifier.timestamp(entry) >= cutoff) continue
       await fs.unlink(path.join(DIR, entry)).catch(() => {})
@@ -91,7 +92,7 @@ export namespace Truncate {
 
     const id = Identifier.ascending("tool")
     const filepath = path.join(DIR, id)
-    await Bun.write(Bun.file(filepath), text)
+    await Filesystem.write(filepath, text)
 
     const hint = hasTaskTool(agent)
       ? `The tool call succeeded but the output was truncated. Full output saved to: ${filepath}\nUse the Task tool to have explore agent process this file with Grep and Read (with offset/limit). Do NOT read the full file yourself - delegate to save context.`

packages/opencode/src/tool/webfetch.ts

@@ -3,7 +3,6 @@ import { Tool } from "./tool"
 import TurndownService from "turndown"
 import DESCRIPTION from "./webfetch.txt"
 import { abortAfterAny } from "../util/abort"
-import { Identifier } from "../id/id"
 
 const MAX_RESPONSE_SIZE = 5 * 1024 * 1024 // 5MB
 const DEFAULT_TIMEOUT = 30 * 1000 // 30 seconds
@@ -103,9 +102,6 @@ export const WebFetchTool = Tool.define("webfetch", {
         metadata: {},
         attachments: [
           {
-            id: Identifier.ascending("part"),
-            sessionID: ctx.sessionID,
-            messageID: ctx.messageID,
             type: "file",
             mime,
             url: `data:${mime};base64,${base64Content}`,

packages/opencode/src/tool/write.ts

@@ -26,9 +26,8 @@ export const WriteTool = Tool.define("write", {
     const filepath = path.isAbsolute(params.filePath) ? params.filePath : path.join(Instance.directory, params.filePath)
     await assertExternalDirectory(ctx, filepath)
 
-    const file = Bun.file(filepath)
-    const exists = await file.exists()
-    const contentOld = exists ? await file.text() : ""
+    const exists = await Filesystem.exists(filepath)
+    const contentOld = exists ? await Filesystem.readText(filepath) : ""
     if (exists) await FileTime.assert(ctx.sessionID, filepath)
 
     const diff = trimDiff(createTwoFilesPatch(filepath, filepath, contentOld, params.content))
@@ -42,7 +41,7 @@ export const WriteTool = Tool.define("write", {
       },
     })
 
-    await Bun.write(filepath, params.content)
+    await Filesystem.write(filepath, params.content)
     await Bus.publish(File.Event.Edited, {
       file: filepath,
     })

packages/opencode/src/util/filesystem.ts

@@ -1,18 +1,104 @@
+import { chmod, mkdir, readFile, writeFile } from "fs/promises"
+import { createWriteStream, existsSync, statSync } from "fs"
+import { lookup } from "mime-types"
 import { realpathSync } from "fs"
 import { dirname, join, relative } from "path"
+import { Readable } from "stream"
+import { pipeline } from "stream/promises"
+import { Glob } from "./glob"
 
 export namespace Filesystem {
-  export const exists = (p: string) =>
-    Bun.file(p)
-      .stat()
-      .then(() => true)
-      .catch(() => false)
+  // Fast sync version for metadata checks
+  export async function exists(p: string): Promise<boolean> {
+    return existsSync(p)
+  }
+
+  export async function isDir(p: string): Promise<boolean> {
+    try {
+      return statSync(p).isDirectory()
+    } catch {
+      return false
+    }
+  }
+
+  export function stat(p: string): ReturnType<typeof statSync> | undefined {
+    return statSync(p, { throwIfNoEntry: false }) ?? undefined
+  }
+
+  export async function size(p: string): Promise<number> {
+    const s = stat(p)?.size ?? 0
+    return typeof s === "bigint" ? Number(s) : s
+  }
+
+  export async function readText(p: string): Promise<string> {
+    return readFile(p, "utf-8")
+  }
+
+  export async function readJson<T = any>(p: string): Promise<T> {
+    return JSON.parse(await readFile(p, "utf-8"))
+  }
+
+  export async function readBytes(p: string): Promise<Buffer> {
+    return readFile(p)
+  }
+
+  export async function readArrayBuffer(p: string): Promise<ArrayBuffer> {
+    const buf = await readFile(p)
+    return buf.buffer.slice(buf.byteOffset, buf.byteOffset + buf.byteLength) as ArrayBuffer
+  }
+
+  function isEnoent(e: unknown): e is { code: "ENOENT" } {
+    return typeof e === "object" && e !== null && "code" in e && (e as { code: string }).code === "ENOENT"
+  }
+
+  export async function write(p: string, content: string | Buffer | Uint8Array, mode?: number): Promise<void> {
+    try {
+      if (mode) {
+        await writeFile(p, content, { mode })
+      } else {
+        await writeFile(p, content)
+      }
+    } catch (e) {
+      if (isEnoent(e)) {
+        await mkdir(dirname(p), { recursive: true })
+        if (mode) {
+          await writeFile(p, content, { mode })
+        } else {
+          await writeFile(p, content)
+        }
+        return
+      }
+      throw e
+    }
+  }
+
+  export async function writeJson(p: string, data: unknown, mode?: number): Promise<void> {
+    return write(p, JSON.stringify(data, null, 2), mode)
+  }
+
+  export async function writeStream(
+    p: string,
+    stream: ReadableStream<Uint8Array> | Readable,
+    mode?: number,
+  ): Promise<void> {
+    const dir = dirname(p)
+    if (!existsSync(dir)) {
+      await mkdir(dir, { recursive: true })
+    }
+
+    const nodeStream = stream instanceof ReadableStream ? Readable.fromWeb(stream as any) : stream
+    const writeStream = createWriteStream(p)
+    await pipeline(nodeStream, writeStream)
+
+    if (mode) {
+      await chmod(p, mode)
+    }
+  }
+
+  export function mimeType(p: string): string {
+    return lookup(p) || "application/octet-stream"
+  }
 
-  export const isDir = (p: string) =>
-    Bun.file(p)
-      .stat()
-      .then((s) => s.isDirectory())
-      .catch(() => false)
   /**
    * On Windows, normalize a path to its canonical casing using the filesystem.
    * This is needed because Windows paths are case-insensitive but LSP servers
@@ -26,6 +112,7 @@ export namespace Filesystem {
       return p
     }
   }
+
   export function overlaps(a: string, b: string) {
     const relA = relative(a, b)
     const relB = relative(b, a)
@@ -70,16 +157,13 @@ export namespace Filesystem {
     const result = []
     while (true) {
       try {
-        const glob = new Bun.Glob(pattern)
-        for await (const match of glob.scan({
+        const matches = await Glob.scan(pattern, {
           cwd: current,
           absolute: true,
-          onlyFiles: true,
-          followSymlinks: true,
+          include: "file",
           dot: true,
-        })) {
-          result.push(match)
-        }
+        })
+        result.push(...matches)
       } catch {
         // Skip invalid glob patterns
       }

packages/opencode/src/util/glob.ts

@@ -0,0 +1,34 @@
+import { glob, globSync, type GlobOptions } from "glob"
+import { minimatch } from "minimatch"
+
+export namespace Glob {
+  export interface Options {
+    cwd?: string
+    absolute?: boolean
+    include?: "file" | "all"
+    dot?: boolean
+    symlink?: boolean
+  }
+
+  function toGlobOptions(options: Options): GlobOptions {
+    return {
+      cwd: options.cwd,
+      absolute: options.absolute,
+      dot: options.dot,
+      follow: options.symlink ?? false,
+      nodir: options.include !== "all",
+    }
+  }
+
+  export async function scan(pattern: string, options: Options = {}): Promise<string[]> {
+    return glob(pattern, toGlobOptions(options)) as Promise<string[]>
+  }
+
+  export function scanSync(pattern: string, options: Options = {}): string[] {
+    return globSync(pattern, toGlobOptions(options)) as string[]
+  }
+
+  export function match(pattern: string, filepath: string): boolean {
+    return minimatch(filepath, pattern, { dot: true })
+  }
+}

packages/opencode/src/util/log.ts

@@ -1,7 +1,9 @@
 import path from "path"
 import fs from "fs/promises"
+import { createWriteStream } from "fs"
 import { Global } from "../global"
 import z from "zod"
+import { Glob } from "./glob"
 
 export namespace Log {
   export const Level = z.enum(["DEBUG", "INFO", "WARN", "ERROR"]).meta({ ref: "LogLevel", description: "Log level" })
@@ -63,24 +65,24 @@ export namespace Log {
       Global.Path.log,
       options.dev ? "dev.log" : new Date().toISOString().split(".")[0].replace(/:/g, "") + ".log",
     )
-    const logfile = Bun.file(logpath)
     await fs.truncate(logpath).catch(() => {})
-    const writer = logfile.writer()
+    const stream = createWriteStream(logpath, { flags: "a" })
     write = async (msg: any) => {
-      const num = writer.write(msg)
-      writer.flush()
-      return num
+      return new Promise((resolve, reject) => {
+        stream.write(msg, (err) => {
+          if (err) reject(err)
+          else resolve(msg.length)
+        })
+      })
     }
   }
 
   async function cleanup(dir: string) {
-    const glob = new Bun.Glob("????-??-??T??????.log")
-    const files = await Array.fromAsync(
-      glob.scan({
-        cwd: dir,
-        absolute: true,
-      }),
-    )
+    const files = await Glob.scan("????-??-??T??????.log", {
+      cwd: dir,
+      absolute: true,
+      include: "file",
+    })
     if (files.length <= 5) return
 
     const filesToDelete = files.slice(0, -10)