start() — mcp Function Reference

Source Code

src/server.ts lines 235–275

  async start() {
    // Clean up any stale ZIP files from previous sessions
    await cleanupOldZips(ZIP_CLEANUP_AGE_MS);

    // Load pre-computed graphs from cache directory
    const cacheDir = process.env.SUPERMODEL_CACHE_DIR;
    if (cacheDir) {
      try {
        logger.debug('Loading pre-computed graphs from:', cacheDir);
        const repoMap = await loadCacheFromDisk(cacheDir, graphCache);
        setRepoMap(repoMap);
        logger.debug(`Loaded ${repoMap.size} repo mappings`);
        this.injectOverviewInstructions(repoMap);
      } catch (err: any) {
        logger.warn('Failed to load cache directory:', err.message || err);
      }
    }

    // Connect transport FIRST so the MCP handshake completes immediately.
    // This prevents Claude Code from timing out the server (MCP_TIMEOUT=60s)
    // when precaching requires a slow API call.
    const transport = new StdioServerTransport();
    await this.server.connect(transport);
    logger.info('Supermodel MCP Server running on stdio');

    // Precache the workdir's repo if --precache flag is set.
    // Runs AFTER connect but BEFORE noApiFallback so the API is available.
    // This is fire-and-forget from the MCP client's perspective — tools
    // that arrive before precaching finishes will use on-demand API calls.
    if (this.options?.precache && this.defaultWorkdir) {
      try {
        await precacheForDirectory(this.client, this.defaultWorkdir, cacheDir);
      } catch (err: any) {
        // Non-fatal: if precaching fails, tools fall back to on-demand API
        logger.warn('Startup precache failed:', err.message || err);
      }
    }

    // NOW enable no-api-fallback (after precaching had its chance)
    setNoApiFallback(!!this.options?.noApiFallback);
  }