Function generatePrompt

src/core/prompts/system.ts:41–128

(
	context: vscode.ExtensionContext,
	cwd: string,
	supportsComputerUse: boolean,
	mode: Mode,
	mcpHub?: McpHub,
	diffStrategy?: DiffStrategy,
	promptComponent?: PromptComponent,
	customModeConfigs?: ModeConfig[],
	globalCustomInstructions?: string,
	experiments?: Record<string, boolean>,
	language?: string,
	rooIgnoreInstructions?: string,
	settings?: SystemPromptSettings,
	todoList?: TodoItem[],
	modelId?: string,
	skillsManager?: SkillsManager,
)

}

async function generatePrompt(
	context: vscode.ExtensionContext,
	cwd: string,
	supportsComputerUse: boolean,
	mode: Mode,
	mcpHub?: McpHub,
	diffStrategy?: DiffStrategy,
	promptComponent?: PromptComponent,
	customModeConfigs?: ModeConfig[],
	globalCustomInstructions?: string,
	experiments?: Record<string, boolean>,
	language?: string,
	rooIgnoreInstructions?: string,
	settings?: SystemPromptSettings,
	todoList?: TodoItem[],
	modelId?: string,
	skillsManager?: SkillsManager,
): Promise<string> {
	if (!context) {
		throw new Error("Extension context is required for generating system prompt")
	}

	// Get the full mode config to ensure we have the role definition (used for groups, etc.)
	const modeConfig = getModeBySlug(mode, customModeConfigs) || modes.find((m) => m.slug === mode) || modes[0]
	const { roleDefinition, baseInstructions } = getModeSelection(mode, promptComponent, customModeConfigs)

	// Check if MCP functionality should be included
	const hasMcpGroup = modeConfig.groups.some((groupEntry) => getGroupName(groupEntry) === "mcp")
	const allowedMcpServers = modeConfig.allowedMcpServers

	// Hoist the allowlist Set once (matches the sibling call sites, e.g. mcp_server.ts) instead
	// of constructing a new Set on every `.filter` iteration.
	const allowSet = allowedMcpServers ? new Set(allowedMcpServers) : undefined

	let hasMcpServers = false
	if (mcpHub) {
		const servers = allowSet ? mcpHub.getServers().filter((s) => allowSet.has(s.name)) : mcpHub.getServers()
		hasMcpServers = servers.length > 0
	}
	const shouldIncludeMcp = hasMcpGroup && hasMcpServers

	const codeIndexManager = CodeIndexManager.getInstance(context, cwd)

	// Tool calling is native-only.
	const effectiveProtocol = "native"

	const [modesSection, skillsSection] = await Promise.all([
		getModesSection(context),
		getSkillsSection(skillsManager, mode as string),
	])

	// Tools catalog is not included in the system prompt.
	const toolsCatalog = ""

	const basePrompt = `${roleDefinition}

${markdownFormattingSection()}