fix(vscode): align plugin command loading with CLI

CI caught two real TypeScript errors that had gone unnoticed locally
(the dev environment's @cline/core build artifacts were stale, masking
them):

1. sdk-plugin-commands.ts: createContributionRegistry() was called
   without type arguments, defaulting TMessage to `unknown`. This
   doesn't match AgentExtension's setup() signature, which expects
   Message[] (per @cline/shared), causing a type mismatch. Mirror the
   CLI's equivalent call in plugin-chat-commands.ts, which explicitly
   parameterizes <Extension, AgentTool, Message[]>.

2. SdkController.ts: emitSessionEvents(messages, event) requires two
   arguments, but the plugin-command reply path only passed one. Add
   the missing status event, matching the pattern used elsewhere in
   this file (e.g. the provider-failure error path) and in
   sdk-followup-coordinator.ts.

apps/vscode/esbuild.mjs

@@ -1,5 +1,6 @@
 import fs from "node:fs"
 import path from "node:path"
+import { createRequire } from "node:module"
 import { fileURLToPath } from "node:url"
 import * as esbuild from "esbuild"
 
@@ -178,6 +179,39 @@ const e2eBuildConfig = {
 	plugins: [aliasResolverPlugin, esbuildProblemMatcherPlugin],
 }
 
+/**
+ * Copies the plugin sandbox bootstrap from the built @cline/core package into
+ * the extension's dist directory. The bootstrap runs in an isolated child
+ * process spawned by SubprocessSandbox and must be a separate file — it cannot
+ * be inlined into the main bundle. resolveBootstrap() (bundled into
+ * extension.js) searches for it at dist/extensions/plugin-sandbox-bootstrap.js.
+ *
+ * The bootstrap has external runtime dependencies (jiti for TypeScript
+ * transpilation, @cline/shared) that it resolves via Node's standard module
+ * resolution from its on-disk location. Both must be direct dependencies of
+ * the extension so they are present in node_modules and resolvable from
+ * dist/extensions/. The CLI build performs the same copy in apps/cli/bun.mts.
+ */
+function copyPluginSandboxBootstrap() {
+	if (e2eBuild) return
+	const projectRequire = createRequire(import.meta.url)
+	let corePackageDir
+	try {
+		corePackageDir = path.dirname(projectRequire.resolve("@cline/core/package.json"))
+	} catch {
+		console.warn("[esbuild] @cline/core not found — skipping plugin sandbox bootstrap copy")
+		return
+	}
+	const bootstrapSrc = path.join(corePackageDir, "dist", "extensions", "plugin-sandbox-bootstrap.js")
+	if (!fs.existsSync(bootstrapSrc)) {
+		console.warn(`[esbuild] plugin-sandbox-bootstrap.js not found at ${bootstrapSrc} — build @cline/core first`)
+		return
+	}
+	const bootstrapDest = path.join(__dirname, destDir, "extensions", "plugin-sandbox-bootstrap.js")
+	fs.mkdirSync(path.dirname(bootstrapDest), { recursive: true })
+	fs.copyFileSync(bootstrapSrc, bootstrapDest)
+}
+
 async function main() {
 	const config = standalone ? standaloneConfig : e2eBuild ? e2eBuildConfig : extensionConfig
 	const extensionCtx = await esbuild.context(config)
@@ -187,6 +221,7 @@ async function main() {
 		await extensionCtx.rebuild()
 		await extensionCtx.dispose()
 	}
+	copyPluginSandboxBootstrap()
 }
 
 main().catch((e) => {

apps/vscode/package.json

@@ -467,6 +467,7 @@
 		"@cline/agents": "workspace:*",
 		"@cline/core": "workspace:*",
 		"@cline/llms": "workspace:*",
+		"@cline/sdk": "workspace:*",
 		"@cline/shared": "workspace:*",
 		"@google/genai": "^1.30.0",
 		"@grpc/grpc-js": "^1.9.15",
@@ -519,6 +520,7 @@
 		"ignore": "^7.0.3",
 		"image-size": "^2.0.2",
 		"isbinaryfile": "^5.0.2",
+		"jiti": "^2.7.0",
 		"js-yaml": "^4.1.1",
 		"jschardet": "^3.1.4",
 		"json5": "^2.2.3",

apps/vscode/src/core/controller/slash/getAvailableSlashCommands.ts

@@ -21,6 +21,23 @@ export async function getAvailableSlashCommands(controller: Controller, _request
 		)
 	}
 
+	// Add plugin-registered commands
+	try {
+		const pluginCommands = await controller.getPluginSlashCommands()
+		for (const cmd of pluginCommands) {
+			commands.push(
+				SlashCommandInfo.create({
+					name: cmd.name,
+					description: cmd.description ?? `Plugin command: ${cmd.name}`,
+					section: "custom",
+					cliCompatible: true,
+				}),
+			)
+		}
+	} catch {
+		// Plugin command discovery is best-effort; don't fail the whole list.
+	}
+
 	// Get workflow toggles from state
 	const localWorkflowToggles = controller.stateManager.getWorkspaceStateKey("workflowToggles") ?? {}
 	const globalWorkflowToggles = controller.stateManager.getGlobalSettingsKey("globalWorkflowToggles") ?? {}

apps/vscode/src/core/controller/state/getStateToPostToWebview.ts

@@ -27,6 +27,7 @@ export async function getStateToPostToWebview(controller: {
 	backgroundCommandTaskId?: string
 	workspaceManager?: any
 	checkpointRestoreInput?: ExtensionState["checkpointRestoreInput"]
+	getPluginSlashCommands?: () => Promise<{ name: string; description?: string }[]>
 }): Promise<ExtensionState> {
 	const stateManager = controller.stateManager
 
@@ -108,6 +109,15 @@ export async function getStateToPostToWebview(controller: {
 		// Codex OAuth not available
 	}
 
+	// Plugin slash commands are fetched best-effort so autocomplete failures
+	// don't block state posting.
+	let pluginSlashCommands: { name: string; description?: string }[] = []
+	try {
+		pluginSlashCommands = (await controller.getPluginSlashCommands?.()) ?? []
+	} catch {
+		// Plugin command discovery is best-effort.
+	}
+
 	return {
 		version,
 		apiConfiguration,
@@ -155,6 +165,7 @@ export async function getStateToPostToWebview(controller: {
 		taskHistory: processedTaskHistory,
 		shouldShowAnnouncement,
 		favoritedModelIds,
+		pluginSlashCommands,
 		backgroundCommandRunning: controller.backgroundCommandRunning ?? false,
 		backgroundCommandTaskId: controller.backgroundCommandTaskId,
 		workspaceRoots: controller.workspaceManager?.getRoots?.() ?? [],

apps/vscode/src/sdk/SdkController.ts

@@ -71,6 +71,7 @@ import { SdkInteractionCoordinator } from "./sdk-interaction-coordinator"
 import { SdkMcpCoordinator } from "./sdk-mcp-coordinator"
 import { SdkMessageCoordinator, type SessionEventListener } from "./sdk-message-coordinator"
 import { SdkModeCoordinator } from "./sdk-mode-coordinator"
+import { type PluginSlashCommand, SdkPluginCommandCoordinator } from "./sdk-plugin-commands"
 import { SdkProviderChangeCoordinator } from "./sdk-provider-change-coordinator"
 import { SdkSessionConfigBuilder } from "./sdk-session-config-builder"
 import { SdkSessionEventCoordinator } from "./sdk-session-event-coordinator"
@@ -166,6 +167,7 @@ export class Controller {
 	private compaction: SdkCompactionCoordinator
 	private sessionEvents: SdkSessionEventCoordinator
 	private sessionHistory: SdkSessionHistoryLoader
+	private pluginCommands: SdkPluginCommandCoordinator
 	private readonly sdkTelemetry: VscodeSdkTelemetryHandle
 	private readonly providerFailureTelemetryTurnGate = new ProviderFailureTelemetryTurnGate()
 	private readonly providerConfigStore: ProviderConfigStore
@@ -480,6 +482,9 @@ export class Controller {
 			},
 			postStateToWebview: () => this.postStateToWebview(),
 		})
+		this.pluginCommands = new SdkPluginCommandCoordinator({
+			getWorkspaceRoot: () => this.getWorkspaceRoot(),
+		})
 		this.taskStart = new SdkTaskStartCoordinator({
 			stateManager: this.stateManager,
 			sessions: this.sessions,
@@ -572,6 +577,15 @@ export class Controller {
 		this.providerCatalog.invalidateProviderListings()
 	}
 
+	/**
+	 * Return plugin-registered slash commands for autocomplete. Used by the
+	 * getAvailableSlashCommands gRPC handler to surface plugin commands in the
+	 * webview's slash command picker.
+	 */
+	getPluginSlashCommands(): Promise<PluginSlashCommand[]> {
+		return this.pluginCommands.getSlashCommands()
+	}
+
 	private handleProviderConfigChange(event: ProviderConfigChange): void {
 		this.scheduleProviderConfigStatePost()
 
@@ -674,6 +688,7 @@ export class Controller {
 		// are disposed below — see StatePostDebouncer.dispose().
 		await this.statePostDebouncer.dispose()
 		await this.invalidateUserInstructionService()
+		await this.pluginCommands.dispose()
 		this.messages.cancelPendingSave()
 		// Clear MCP tool list change callback before disposing McpHub
 		this.mcpHub?.clearToolListChangeCallback()
@@ -734,14 +749,48 @@ export class Controller {
 	}
 
 	/**
-	 * Expand a leading `/workflow` or `/skill` slash command into its instruction
-	 * body. Mirrors the CLI's `buildUserInputMessage`. Returns the input unchanged
-	 * if it is not a known command or expansion fails.
+	 * Expand a leading slash command. First checks plugin-registered commands
+	 * (e.g. `/goal`), then falls back to workflow/skill expansion via the
+	 * user-instruction service. For plugin commands:
+	 * - If the handler returns `submitPrompt`, that becomes the prompt text.
+	 * - If the handler returns `reply`, it is emitted as a say message.
+	 * - If only `reply` is returned (no `submitPrompt`), returns empty string
+	 *   so the agent turn is suppressed (the reply was already shown).
+	 * Returns the input unchanged if it is not a known command.
 	 */
 	private async resolveSlashCommands(text: string): Promise<string> {
 		if (this.isDisposed) {
 			return text
 		}
+
+		// Check plugin commands first — they take precedence over
+		// workflow/skill expansion so plugin names cannot be shadowed.
+		try {
+			const result = await this.pluginCommands.resolveCommand(text)
+			if (result) {
+				if (result.reply) {
+					this.messages.emitSessionEvents(
+						[
+							{
+								ts: Date.now(),
+								type: "say",
+								say: "text",
+								text: result.reply,
+								partial: false,
+							},
+						],
+						{
+							type: "status",
+							payload: { sessionId: this.sessions.getActiveSession()?.sessionId ?? "", status: "running" },
+						},
+					)
+				}
+				return result.submitPrompt ?? ""
+			}
+		} catch (error) {
+			Logger.warn("[SdkController] Plugin command resolution failed, falling through:", error)
+		}
+
 		try {
 			const workspaceRoot = await this.getWorkspaceRoot()
 			const service = await this.ensureUserInstructionService(workspaceRoot)
@@ -1800,6 +1849,7 @@ export class Controller {
 				mcpHub: this.mcpHub,
 				backgroundCommandRunning: this.backgroundCommandRunning,
 				backgroundCommandTaskId: this.backgroundCommandTaskId,
+				getPluginSlashCommands: () => this.pluginCommands.getSlashCommands(),
 			})
 			const sdkTaskHistory = (await this.taskHistory.listHistory({ limit: 100, hydrate: false }))
 				.map(sessionHistoryRecordToHistoryItem)

apps/vscode/src/sdk/sdk-plugin-commands.test.ts

@@ -0,0 +1,31 @@
+import { describe, expect, it, vi } from "vitest"
+import { normalizePluginCommandName, SdkPluginCommandCoordinator } from "./sdk-plugin-commands"
+
+describe("SdkPluginCommandCoordinator", () => {
+	it("loads plugins from the active workspace", async () => {
+		const loadPlugins = vi.fn(async () => ({
+			extensions: [],
+			pluginPaths: [],
+			failures: [],
+			warnings: [],
+		}))
+		const coordinator = new SdkPluginCommandCoordinator({
+			getWorkspaceRoot: async () => "/workspace/project",
+			loadPlugins,
+		})
+
+		await coordinator.getSlashCommands()
+
+		expect(loadPlugins).toHaveBeenCalledWith(
+			expect.objectContaining({
+				cwd: "/workspace/project",
+				workspacePath: "/workspace/project",
+			}),
+		)
+	})
+
+	it("normalizes plugin command names like the CLI", () => {
+		expect(normalizePluginCommandName(" /Goal ")).toBe("goal")
+		expect(normalizePluginCommandName("GOAL")).toBe("goal")
+	})
+})

apps/vscode/src/sdk/sdk-plugin-commands.ts

@@ -0,0 +1,174 @@
+// SdkPluginCommandCoordinator — discovers and executes plugin-registered
+// slash commands, mirroring the CLI's createWorkspaceChatCommandHost.
+//
+// Plugins register commands via `api.registerCommand({ name, handler })` in
+// their setup(). The ContributionRegistry runs setup() and collects the
+// registered commands. This coordinator:
+//   1. Lazily loads plugins via resolveAndLoadAgentPlugins (sandbox mode)
+//   2. Initializes a ContributionRegistry to run setup() and gather commands
+//   3. Exposes getSlashCommands() for autocomplete
+//   4. Exposes resolveCommand(text) to execute a /command and return its result
+
+import {
+	type AgentExtensionCommand,
+	type AgentExtensionCommandResult,
+	createContributionRegistry,
+	noopBasicLogger,
+	resolveAndLoadAgentPlugins,
+} from "@cline/core"
+import type { AgentTool, Message } from "@cline/shared"
+import { Logger } from "@shared/services/Logger"
+
+export interface PluginSlashCommand {
+	name: string
+	description?: string
+}
+
+export interface PluginCommandResult {
+	reply?: string
+	submitPrompt?: string
+}
+
+interface LoadedPlugins {
+	commands: AgentExtensionCommand[]
+	shutdown: () => Promise<void>
+}
+
+export interface SdkPluginCommandCoordinatorOptions {
+	getWorkspaceRoot: () => Promise<string>
+	loadPlugins?: typeof resolveAndLoadAgentPlugins
+}
+
+export function normalizePluginCommandName(name: string): string {
+	const trimmed = name.trim()
+	return (trimmed.startsWith("/") ? trimmed.slice(1) : trimmed).toLowerCase()
+}
+
+export class SdkPluginCommandCoordinator {
+	private loadedPromise: Promise<LoadedPlugins | undefined> | undefined
+
+	constructor(private readonly options: SdkPluginCommandCoordinatorOptions) {}
+
+	/**
+	 * Lazily load plugins and initialize the contribution registry. The result
+	 * is cached so subsequent calls reuse the same sandbox process. Returns
+	 * undefined if no plugins are installed or loading fails.
+	 */
+	private ensureLoaded(): Promise<LoadedPlugins | undefined> {
+		if (this.loadedPromise) {
+			return this.loadedPromise
+		}
+		this.loadedPromise = (async () => {
+			let loaded: Awaited<ReturnType<typeof resolveAndLoadAgentPlugins>>
+			try {
+				const workspaceRoot = await this.options.getWorkspaceRoot()
+				loaded = await (this.options.loadPlugins ?? resolveAndLoadAgentPlugins)({
+					cwd: workspaceRoot,
+					workspacePath: workspaceRoot,
+					logger: noopBasicLogger,
+				})
+			} catch (error) {
+				const message = error instanceof Error ? error.message : String(error)
+				Logger.warn(`[PluginCommands] Plugin loading failed; continuing without plugin commands (${message})`)
+				return undefined
+			}
+			if (!loaded.extensions.length) {
+				await loaded.shutdown?.().catch(() => {})
+				return undefined
+			}
+
+			const registry = createContributionRegistry<(typeof loaded.extensions)[number], AgentTool, Message[]>({
+				extensions: loaded.extensions,
+			})
+			try {
+				await registry.initialize()
+			} catch (error) {
+				const message = error instanceof Error ? error.message : String(error)
+				Logger.warn(`[PluginCommands] Contribution registry initialization failed (${message})`)
+				await loaded.shutdown?.().catch(() => {})
+				return undefined
+			}
+
+			return {
+				commands: registry.getRegistrySnapshot().commands,
+				shutdown: async () => {
+					await loaded.shutdown?.().catch(() => {})
+				},
+			}
+		})()
+		return this.loadedPromise
+	}
+
+	/**
+	 * Return plugin-registered slash commands for autocomplete. Returns an
+	 * empty array if no plugins are installed or loading fails.
+	 */
+	async getSlashCommands(): Promise<PluginSlashCommand[]> {
+		const loaded = await this.ensureLoaded()
+		if (!loaded) {
+			return []
+		}
+		return loaded.commands
+			.filter((cmd) => typeof cmd.handler === "function")
+			.map((cmd) => ({
+				name: normalizePluginCommandName(cmd.name),
+				description: cmd.description,
+			}))
+			.filter((cmd) => cmd.name.length > 0)
+	}
+
+	/**
+	 * Resolve a leading /command from a plugin. Returns null if the text does
+	 * not match a plugin command. Returns { reply?, submitPrompt? } from the
+	 * command handler.
+	 */
+	async resolveCommand(text: string): Promise<PluginCommandResult | null> {
+		if (!text.startsWith("/") || text.length < 2) {
+			return null
+		}
+		const match = text.match(/^\/(\S+)/)
+		if (!match?.[1]) {
+			return null
+		}
+		const name = normalizePluginCommandName(match[1])
+		const remainder = text.slice(name.length + 1).trim()
+
+		const loaded = await this.ensureLoaded()
+		if (!loaded) {
+			return null
+		}
+		const command = loaded.commands.find(
+			(cmd) => normalizePluginCommandName(cmd.name) === name && typeof cmd.handler === "function",
+		)
+		if (!command?.handler) {
+			return null
+		}
+
+		try {
+			const result: AgentExtensionCommandResult = await command.handler(remainder)
+			if (typeof result === "string") {
+				return { reply: result }
+			}
+			return {
+				reply: result.reply,
+				submitPrompt: result.submitPrompt,
+			}
+		} catch (error) {
+			const message = error instanceof Error ? error.message : String(error)
+			Logger.warn(`[PluginCommands] Command "/${name}" failed: ${message}`)
+			return { reply: `Command /${name} failed: ${message}` }
+		}
+	}
+
+	/**
+	 * Shut down the plugin sandbox process. Called on extension disposal.
+	 */
+	async dispose(): Promise<void> {
+		const promise = this.loadedPromise
+		this.loadedPromise = undefined
+		if (promise) {
+			const loaded = await promise.catch(() => undefined)
+			await loaded?.shutdown().catch(() => {})
+		}
+	}
+}

apps/vscode/src/shared/ExtensionMessage.ts

@@ -16,6 +16,7 @@ import { OnboardingModelGroup } from "./proto/cline/state"
 import { Mode } from "./storage/types"
 import { TelemetrySetting } from "./TelemetrySetting"
 import { UserInfo } from "./UserInfo"
+import type { SlashCommand } from "./slashCommands"
 // webview will hold state
 export interface ExtensionMessage {
 	type: "grpc_response" // New type for gRPC responses
@@ -114,6 +115,8 @@ export interface ExtensionState {
 	worktreesEnabled?: ClineFeatureSetting
 	customPrompt?: string
 	favoritedModelIds: string[]
+	/** Plugin-registered slash commands surfaced for autocomplete. */
+	pluginSlashCommands?: SlashCommand[]
 	// NEW: Add workspace information
 	workspaceRoots: WorkspaceRoot[]
 	primaryRootIndex: number

apps/vscode/src/test/plugin-sandbox-bootstrap.build.test.ts

@@ -0,0 +1,67 @@
+import { existsSync } from "node:fs"
+import { readFile } from "node:fs/promises"
+import { createRequire } from "node:module"
+import { join } from "node:path"
+import { describe, expect, it } from "bun:test"
+import { $ } from "bun"
+
+/**
+ * Integration test for CLINE-2584: the plugin sandbox bootstrap
+ * (`plugin-sandbox-bootstrap.js`) must be shipped with the VS Code extension.
+ *
+ * The bootstrap runs in an isolated child process spawned by
+ * `SubprocessSandbox` — it cannot be inlined into `extension.js` because the
+ * sandbox spawns it via `node <bootstrapFile>`. The CLI build copies this
+ * file (`apps/cli/bun.mts`); the extension build (`esbuild.mjs`) must do the
+ * same.
+ *
+ * The bootstrap also has external runtime dependencies that must be resolvable
+ * from its on-disk location via Node's standard module resolution:
+ * - jiti (TypeScript transpilation of .ts plugins)
+ * - @cline/shared, @cline/sdk (host-provided SDK packages that plugins import)
+ *
+ * This test runs the real `bun esbuild.mjs` build and checks the real
+ * `dist/` output, exercising the same build pipeline CI uses.
+ */
+
+const projectRoot = join(import.meta.dir, "..", "..")
+const distDir = join(projectRoot, "dist")
+const bootstrapPath = join(distDir, "extensions", "plugin-sandbox-bootstrap.js")
+
+describe("plugin-sandbox bootstrap build artifact (CLINE-2584)", () => {
+	it("esbuild.mjs emits plugin-sandbox-bootstrap.js into dist/", async () => {
+		const result = await $`bun esbuild.mjs`.cwd(projectRoot).quiet()
+		expect(result.exitCode).toBe(0)
+
+		expect(existsSync(join(distDir, "extension.js"))).toBe(true)
+		expect(existsSync(bootstrapPath)).toBe(true)
+	}, 60_000)
+
+	it("the bootstrap is a real executable script with IPC handling", async () => {
+		expect(existsSync(bootstrapPath)).toBe(true)
+
+		const content = await readFile(bootstrapPath, "utf8")
+		expect(content.length).toBeGreaterThan(1000)
+		expect(content).toMatch(/process\.on\(.process\.message|process\.send|type:\s*["']response["']/)
+	}, 60_000)
+
+	it("the bootstrap's runtime dependencies resolve from dist/", () => {
+		expect(existsSync(bootstrapPath)).toBe(true)
+
+		// The bootstrap is spawned as a standalone Node child process. It
+		// imports jiti (for TypeScript transpilation) and @cline/shared as
+		// external modules, and plugins import @cline/sdk. Node resolves
+		// these by walking up from the bootstrap's directory. All must be
+		// direct dependencies of the extension so they appear in
+		// node_modules and are resolvable.
+		const requireFromBootstrap = createRequire(bootstrapPath)
+		expect(() => requireFromBootstrap.resolve("jiti")).not.toThrow()
+		expect(() => requireFromBootstrap.resolve("@cline/shared")).not.toThrow()
+		// @cline/sdk is a host-provided SDK specifier that plugins import.
+		// The bootstrap's findHostPackageRoot walks up from dist/extensions/
+		// looking for node_modules/@cline/sdk/package.json.
+		expect(
+			existsSync(join(projectRoot, "node_modules", "@cline", "sdk", "package.json")),
+		).toBe(true)
+	}, 60_000)
+})

apps/vscode/webview-ui/src/components/chat/ChatTextArea.tsx

@@ -224,6 +224,7 @@ const ChatTextArea = forwardRef<HTMLTextAreaElement, ChatTextAreaProps>(
 			remoteConfigSettings,
 			navigateToSettingsModelPicker,
 			mcpServers,
+			pluginSlashCommands,
 		} = useExtensionState()
 		const [isTextAreaFocused, setIsTextAreaFocused] = useState(false)
 		const [isDraggingOver, setIsDraggingOver] = useState(false)
@@ -489,6 +490,7 @@ const ChatTextArea = forwardRef<HTMLTextAreaElement, ChatTextAreaProps>(
 								remoteWorkflowToggles,
 								remoteConfigSettings?.remoteGlobalWorkflows,
 								mcpServers,
+								pluginSlashCommands,
 							)
 
 							if (allCommands.length === 0) {
@@ -514,6 +516,7 @@ const ChatTextArea = forwardRef<HTMLTextAreaElement, ChatTextAreaProps>(
 							remoteWorkflowToggles,
 							remoteConfigSettings?.remoteGlobalWorkflows,
 							mcpServers,
+							pluginSlashCommands,
 						)
 						if (commands.length > 0) {
 							handleSlashCommandsSelect(commands[selectedSlashCommandsIndex])
@@ -673,6 +676,7 @@ const ChatTextArea = forwardRef<HTMLTextAreaElement, ChatTextAreaProps>(
 				slashCommandsQuery,
 				handleSlashCommandsSelect,
 				sendingDisabled,
+				pluginSlashCommands,
 			],
 		)
 
@@ -984,6 +988,8 @@ const ChatTextArea = forwardRef<HTMLTextAreaElement, ChatTextAreaProps>(
 					globalWorkflowToggles,
 					remoteWorkflowToggles,
 					remoteConfigSettings?.remoteGlobalWorkflows,
+					mcpServers,
+					pluginSlashCommands,
 				)
 
 				if (isValidCommand) {
@@ -997,7 +1003,14 @@ const ChatTextArea = forwardRef<HTMLTextAreaElement, ChatTextAreaProps>(
 			highlightLayerRef.current.innerHTML = processedText
 			highlightLayerRef.current.scrollTop = textAreaRef.current.scrollTop
 			highlightLayerRef.current.scrollLeft = textAreaRef.current.scrollLeft
-		}, [localWorkflowToggles, globalWorkflowToggles, remoteWorkflowToggles, remoteConfigSettings])
+		}, [
+			localWorkflowToggles,
+			globalWorkflowToggles,
+			remoteWorkflowToggles,
+			remoteConfigSettings,
+			mcpServers,
+			pluginSlashCommands,
+		])
 
 		useLayoutEffect(() => {
 			updateHighlights()
@@ -1406,6 +1419,7 @@ const ChatTextArea = forwardRef<HTMLTextAreaElement, ChatTextAreaProps>(
 								mcpServers={mcpServers}
 								onMouseDown={handleMenuMouseDown}
 								onSelect={handleSlashCommandsSelect}
+								pluginSlashCommands={pluginSlashCommands}
 								query={slashCommandsQuery}
 								remoteWorkflows={remoteConfigSettings?.remoteGlobalWorkflows}
 								remoteWorkflowToggles={remoteWorkflowToggles}

apps/vscode/webview-ui/src/components/chat/SlashCommandMenu.tsx

@@ -16,6 +16,7 @@ interface SlashCommandMenuProps {
 	remoteWorkflowToggles?: Record<string, boolean>
 	remoteWorkflows?: any[]
 	mcpServers?: McpServer[]
+	pluginSlashCommands?: SlashCommand[]
 }
 
 const SlashCommandMenu: React.FC<SlashCommandMenuProps> = ({
@@ -29,6 +30,7 @@ const SlashCommandMenu: React.FC<SlashCommandMenuProps> = ({
 	remoteWorkflowToggles,
 	remoteWorkflows,
 	mcpServers = [],
+	pluginSlashCommands = [],
 }) => {
 	const menuRef = useRef<HTMLDivElement>(null)
 
@@ -40,6 +42,7 @@ const SlashCommandMenu: React.FC<SlashCommandMenuProps> = ({
 		remoteWorkflowToggles,
 		remoteWorkflows,
 		mcpServers,
+		pluginSlashCommands,
 	)
 	const defaultCommands = filteredCommands.filter((cmd) => cmd.section === "default" || !cmd.section)
 	const workflowCommands = filteredCommands.filter((cmd) => cmd.section === "custom")

apps/vscode/webview-ui/src/context/ExtensionStateContext.tsx

@@ -289,6 +289,7 @@ export const ExtensionStateContextProvider: React.FC<{
 		localAgentsRulesToggles: {},
 		localWorkflowToggles: {},
 		globalWorkflowToggles: {},
+		pluginSlashCommands: [],
 		shellIntegrationTimeout: 4000,
 		terminalReuseEnabled: true,
 		vscodeTerminalExecutionMode: "vscodeTerminal",
@@ -906,6 +907,7 @@ export const ExtensionStateContextProvider: React.FC<{
 		localAgentsRulesToggles: state.localAgentsRulesToggles || {},
 		localWorkflowToggles: state.localWorkflowToggles || {},
 		globalWorkflowToggles: state.globalWorkflowToggles || {},
+		pluginSlashCommands: state.pluginSlashCommands || [],
 		remoteRulesToggles: state.remoteRulesToggles || {},
 		remoteWorkflowToggles: state.remoteWorkflowToggles || {},
 		enableCheckpointsSetting: state.enableCheckpointsSetting,

apps/vscode/webview-ui/src/utils/slash-commands.ts

@@ -181,6 +181,7 @@ export function getMatchingSlashCommands(
 	remoteWorkflowToggles?: Record<string, boolean>,
 	remoteWorkflows?: any[],
 	mcpServers: McpServer[] = [],
+	pluginSlashCommands: SlashCommand[] = [],
 ): SlashCommand[] {
 	const workflowCommands = getWorkflowCommands(
 		localWorkflowToggles,
@@ -189,7 +190,7 @@ export function getMatchingSlashCommands(
 		remoteWorkflows,
 	)
 	const mcpPromptCommands = getMcpPromptCommands(mcpServers)
-	const allCommands = [...DEFAULT_SLASH_COMMANDS, ...workflowCommands, ...mcpPromptCommands]
+	const allCommands = [...DEFAULT_SLASH_COMMANDS, ...workflowCommands, ...mcpPromptCommands, ...pluginSlashCommands]
 
 	if (!query) {
 		return allCommands
@@ -233,6 +234,7 @@ export function validateSlashCommand(
 	remoteWorkflowToggles?: Record<string, boolean>,
 	remoteWorkflows?: any[],
 	mcpServers: McpServer[] = [],
+	pluginSlashCommands: SlashCommand[] = [],
 ): "full" | "partial" | null {
 	if (!command) {
 		return null
@@ -245,7 +247,7 @@ export function validateSlashCommand(
 		remoteWorkflows,
 	)
 	const mcpPromptCommands = getMcpPromptCommands(mcpServers)
-	const allCommands = [...DEFAULT_SLASH_COMMANDS, ...workflowCommands, ...mcpPromptCommands]
+	const allCommands = [...DEFAULT_SLASH_COMMANDS, ...workflowCommands, ...mcpPromptCommands, ...pluginSlashCommands]
 
 	// case insensitive matching
 	const exactMatch = allCommands.some((cmd) => cmd.name.toLowerCase() === command.toLowerCase())

bun.lock

@@ -354,6 +354,7 @@
         "@cline/agents": "workspace:*",
         "@cline/core": "workspace:*",
         "@cline/llms": "workspace:*",
+        "@cline/sdk": "workspace:*",
         "@cline/shared": "workspace:*",
         "@google/genai": "^1.30.0",
         "@grpc/grpc-js": "^1.9.15",
@@ -406,6 +407,7 @@
         "ignore": "^7.0.3",
         "image-size": "^2.0.2",
         "isbinaryfile": "^5.0.2",
+        "jiti": "^2.7.0",
         "js-yaml": "^4.1.1",
         "jschardet": "^3.1.4",
         "json5": "^2.2.3",