feat: add enabledForSwitching config for mode switching control

- Add enabledForSwitching config to control which modes can be switched to by LLMs
- Update system prompts to exclude non-switchable modes from switch_mode tool
- Update UI components in PromptsView to include enabledForSwitching checkbox
- Update localization files for all supported languages
- Update tests to verify behavior with non-switchable modes

Author: chenjiajun

src/core/config/__tests__/CustomModesSettings.test.ts

@@ -160,12 +160,49 @@ describe("CustomModesSettings", () => {
 					{
 						...validMode,
 						customInstructions: "Optional instructions",
+						enabledForSwitching: false,
 					},
 				],
 			}
 
 			// TypeScript compilation will fail if the type is incorrect
 			expect(settings.customModes[0].customInstructions).toBeDefined()
+			expect(settings.customModes[0].enabledForSwitching).toBeDefined()
+		})
+
+		test("enabledForSwitching can be set to false", () => {
+			const settings = {
+				customModes: [
+					{
+						...validMode,
+						enabledForSwitching: false,
+					},
+				],
+			}
+
+			expect(() => {
+				customModesSettingsSchema.parse(settings)
+			}).not.toThrow()
+			expect(settings.customModes[0].enabledForSwitching).toBe(false)
+		})
+
+		test("enabledForSwitching can be undefined (default to enabled)", () => {
+			const settings = {
+				customModes: [
+					{
+						...validMode,
+						// enabledForSwitching is not specified
+					},
+				],
+			}
+
+			expect(() => {
+				customModesSettingsSchema.parse(settings)
+			}).not.toThrow()
+			// Since validMode doesn't have enabledForSwitching, it should be undefined
+			// which means it's enabled by default
+			const parsedSettings = customModesSettingsSchema.parse(settings)
+			expect(parsedSettings.customModes[0].enabledForSwitching).toBeUndefined()
 		})
 	})
 })

src/core/prompts/sections/modes.ts

@@ -2,7 +2,6 @@ import * as path from "path"
 import * as vscode from "vscode"
 import { promises as fs } from "fs"
 import { ModeConfig, getAllModesWithPrompts } from "../../../shared/modes"
-import { GlobalFileNames } from "../../../shared/globalFileNames"
 
 export async function getModesSection(context: vscode.ExtensionContext): Promise<string> {
 	const settingsDir = path.join(context.globalStorageUri.fsPath, "settings")
@@ -11,12 +10,25 @@ export async function getModesSection(context: vscode.ExtensionContext): Promise
 	// Get all modes with their overrides from extension state
 	const allModes = await getAllModesWithPrompts(context)
 
-	let modesContent = `====
+	// Filter out modes that are disabled for switching
+	const enabledModes = allModes.filter((mode) => {
+		// If enabledForSwitching is explicitly set to false, filter out the mode
+		// Otherwise, include the mode (undefined or true means enabled)
+		return mode.enabledForSwitching !== false
+	})
+
+	let modesContent = enabledModes.length
+		? `====
 
 MODES
 
 - These are the currently available modes:
 ${allModes.map((mode: ModeConfig) => `  * "${mode.name}" mode (${mode.slug}) - ${mode.roleDefinition.split(".")[0]}`).join("\n")}`
+		: `====
+
+MODES
+
+`
 
 	modesContent += `
 If the user asks you to create or edit a new mode for this project, you should read the instructions by using the fetch_instructions tool, like this:

src/core/prompts/system.ts

@@ -66,10 +66,11 @@ async function generatePrompt(
 
 ${getSharedToolUseSection()}
 
-${getToolDescriptionsForMode(
+${await getToolDescriptionsForMode(
 	mode,
 	cwd,
 	supportsComputerUse,
+	context,
 	effectiveDiffStrategy,
 	browserViewportSize,
 	mcpHub,

src/core/prompts/tools/index.ts

@@ -16,9 +16,17 @@ import { getSwitchModeDescription } from "./switch-mode"
 import { getNewTaskDescription } from "./new-task"
 import { DiffStrategy } from "../../diff/DiffStrategy"
 import { McpHub } from "../../../services/mcp/McpHub"
-import { Mode, ModeConfig, getModeConfig, isToolAllowedForMode, getGroupName } from "../../../shared/modes"
+import {
+	Mode,
+	ModeConfig,
+	getModeConfig,
+	isToolAllowedForMode,
+	getGroupName,
+	hasAnySwitchableModes,
+} from "../../../shared/modes"
 import { ToolName, TOOL_GROUPS, ALWAYS_AVAILABLE_TOOLS } from "../../../shared/tool-groups"
 import { ToolArgs } from "./types"
+import { ExtensionContext } from "vscode"
 
 // Map of tool names to their description functions
 const toolDescriptionMap: Record<string, (args: ToolArgs) => string | undefined> = {
@@ -42,16 +50,17 @@ const toolDescriptionMap: Record<string, (args: ToolArgs) => string | undefined>
 		args.diffStrategy ? args.diffStrategy.getToolDescription({ cwd: args.cwd, toolOptions: args.toolOptions }) : "",
 }
 
-export function getToolDescriptionsForMode(
+export async function getToolDescriptionsForMode(
 	mode: Mode,
 	cwd: string,
 	supportsComputerUse: boolean,
+	context: ExtensionContext,
 	diffStrategy?: DiffStrategy,
 	browserViewportSize?: string,
 	mcpHub?: McpHub,
 	customModes?: ModeConfig[],
 	experiments?: Record<string, boolean>,
-): string {
+): Promise<string> {
 	const config = getModeConfig(mode, customModes)
 	const args: ToolArgs = {
 		cwd,
@@ -76,8 +85,14 @@ export function getToolDescriptionsForMode(
 		}
 	})
 
-	// Add always available tools
-	ALWAYS_AVAILABLE_TOOLS.forEach((tool) => tools.add(tool))
+	// Add always available tools except switch_mode if no modes are switchable
+	ALWAYS_AVAILABLE_TOOLS.forEach(async (tool) => {
+		// Skip adding switch_mode tool if no modes are switchable
+		if (tool === "switch_mode" && !(await hasAnySwitchableModes(context))) {
+			return
+		}
+		tools.add(tool)
+	})
 
 	// Map tool descriptions for allowed tools
 	const descriptions = Array.from(tools).map((toolName) => {

src/core/tools/switchModeTool.ts

@@ -35,7 +35,7 @@ export async function switchModeTool(
 
 			// Verify the mode exists
 			const targetMode = getModeBySlug(mode_slug, (await cline.providerRef.deref()?.getState())?.customModes)
-			if (!targetMode) {
+			if (!targetMode || targetMode.enabledForSwitching === false) {
 				pushToolResult(formatResponse.toolError(`Invalid mode: ${mode_slug}`))
 				return
 			}

src/exports/roo-code.d.ts

@@ -334,6 +334,7 @@ type GlobalSettings = {
 					  ]
 				)[]
 				source?: ("global" | "project") | undefined
+				enabledForSwitching?: boolean | undefined
 		  }[]
 		| undefined
 	customModePrompts?:
@@ -342,6 +343,7 @@ type GlobalSettings = {
 					| {
 							roleDefinition?: string | undefined
 							customInstructions?: string | undefined
+							enabledForSwitching?: boolean | undefined
 					  }
 					| undefined
 		  }

src/exports/types.ts

@@ -337,6 +337,7 @@ type GlobalSettings = {
 					  ]
 				)[]
 				source?: ("global" | "project") | undefined
+				enabledForSwitching?: boolean | undefined
 		  }[]
 		| undefined
 	customModePrompts?:
@@ -345,6 +346,7 @@ type GlobalSettings = {
 					| {
 							roleDefinition?: string | undefined
 							customInstructions?: string | undefined
+							enabledForSwitching?: boolean | undefined
 					  }
 					| undefined
 		  }

src/schemas/index.ts

@@ -215,6 +215,7 @@ export const modeConfigSchema = z.object({
 	customInstructions: z.string().optional(),
 	groups: groupEntryArraySchema,
 	source: z.enum(["global", "project"]).optional(),
+	enabledForSwitching: z.boolean().optional(),
 })
 
 export type ModeConfig = z.infer<typeof modeConfigSchema>
@@ -252,6 +253,7 @@ export type CustomModesSettings = z.infer<typeof customModesSettingsSchema>
 export const promptComponentSchema = z.object({
 	roleDefinition: z.string().optional(),
 	customInstructions: z.string().optional(),
+	enabledForSwitching: z.boolean().optional(),
 })
 
 export type PromptComponent = z.infer<typeof promptComponentSchema>

src/shared/modes.ts

@@ -241,6 +241,7 @@ export async function getAllModesWithPrompts(context: vscode.ExtensionContext):
 		...mode,
 		roleDefinition: customModePrompts[mode.slug]?.roleDefinition ?? mode.roleDefinition,
 		customInstructions: customModePrompts[mode.slug]?.customInstructions ?? mode.customInstructions,
+		enabledForSwitching: customModePrompts[mode.slug]?.enabledForSwitching,
 	}))
 }
 
@@ -281,6 +282,7 @@ export async function getFullModeDetails(
 		...baseMode,
 		roleDefinition: promptComponent?.roleDefinition || baseMode.roleDefinition,
 		customInstructions: fullCustomInstructions,
+		enabledForSwitching: promptComponent?.enabledForSwitching,
 	}
 }
 
@@ -303,3 +305,21 @@ export function getCustomInstructions(modeSlug: string, customModes?: ModeConfig
 	}
 	return mode.customInstructions ?? ""
 }
+
+export function getEnabledForSwitching(modeSlug: string, customModes?: ModeConfig[]): boolean {
+	const mode = getModeBySlug(modeSlug, customModes)
+	if (!mode) {
+		console.warn(`No mode found for slug: ${modeSlug}`)
+		return true
+	}
+	return mode.enabledForSwitching ?? true
+}
+
+// Check if any modes are enabled for switching
+export async function hasAnySwitchableModes(context: vscode.ExtensionContext): Promise<boolean> {
+	// Get all modes (built-in and custom)
+	const allModes = await getAllModesWithPrompts(context)
+
+	// Check if any mode is enabled for switching
+	return allModes.some((mode) => mode.enabledForSwitching !== false)
+}