Roo-Code/src/core/webview/generateSystemPrompt.ts

import { WebviewMessage } from "../../shared/WebviewMessage"
import { defaultModeSlug, getModeBySlug, getGroupName } from "../../shared/modes"
import { buildApiHandler } from "../../api"
import { experiments as experimentsModule, EXPERIMENT_IDS } from "../../shared/experiments"

import { SYSTEM_PROMPT } from "../prompts/system"
import { MultiSearchReplaceDiffStrategy } from "../diff/strategies/multi-search-replace"
import { MultiFileSearchReplaceDiffStrategy } from "../diff/strategies/multi-file-search-replace"

import { ClineProvider } from "./ClineProvider"

export const generateSystemPrompt = async (provider: ClineProvider, message: WebviewMessage) => {
	const {
		apiConfiguration,
		customModePrompts,
		customInstructions,
		browserViewportSize,
		diffEnabled,
		mcpEnabled,
		fuzzyMatchThreshold,
		experiments,
		enableMcpServerCreation,
		browserToolEnabled,
		language,
		maxReadFileLine,
		maxConcurrentFileReads,
	} = await provider.getState()

	// Check experiment to determine which diff strategy to use
	const isMultiFileApplyDiffEnabled = experimentsModule.isEnabled(
		experiments ?? {},
		EXPERIMENT_IDS.MULTI_FILE_APPLY_DIFF,
	)

	const diffStrategy = isMultiFileApplyDiffEnabled
		? new MultiFileSearchReplaceDiffStrategy(fuzzyMatchThreshold)
		: new MultiSearchReplaceDiffStrategy(fuzzyMatchThreshold)

	const cwd = provider.cwd

	const mode = message.mode ?? defaultModeSlug
	const customModes = await provider.customModesManager.getCustomModes()

	const rooIgnoreInstructions = provider.getCurrentCline()?.rooIgnoreController?.getInstructions()

	// Determine if browser tools can be used based on model support, mode, and user settings
	let modelSupportsComputerUse = false

	// Create a temporary API handler to check if the model supports computer use
	// This avoids relying on an active Cline instance which might not exist during preview
	try {
		const tempApiHandler = buildApiHandler(apiConfiguration)
		modelSupportsComputerUse = tempApiHandler.getModel().info.supportsComputerUse ?? false
	} catch (error) {
		console.error("Error checking if model supports computer use:", error)
	}

	// Check if the current mode includes the browser tool group
	const modeConfig = getModeBySlug(mode, customModes)
	const modeSupportsBrowser = modeConfig?.groups.some((group) => getGroupName(group) === "browser") ?? false

	// Only enable browser tools if the model supports it, the mode includes browser tools,
	// and browser tools are enabled in settings
	const canUseBrowserTool = modelSupportsComputerUse && modeSupportsBrowser && (browserToolEnabled ?? true)

	const systemPrompt = await SYSTEM_PROMPT(
		provider.context,
		cwd,
		canUseBrowserTool,
		mcpEnabled ? provider.getMcpHub() : undefined,
		diffStrategy,
		browserViewportSize ?? "900x600",
		mode,
		customModePrompts,
		customModes,
		customInstructions,
		diffEnabled,
		experiments,
		enableMcpServerCreation,
		language,
		rooIgnoreInstructions,
		maxReadFileLine !== -1,
		{
			maxConcurrentFileReads,
		},
	)

	return systemPrompt
}