Strudel MCP Server

Instructions

Implementation Reference

• src/server/EnhancedMCPServerFixed.ts:767-769 (handler)

  Handler case in executeTool switch for the 'get_pattern' tool, delegating to getCurrentPatternSafe()

  case 'get_pattern':
    return await this.getCurrentPatternSafe();

• src/StrudelController.ts:180-205 (handler)

  Core handler logic in StrudelController.getCurrentPattern(): reads current pattern from Strudel.cc CodeMirror editor via Playwright, with caching

  async getCurrentPattern(): Promise<string> {
    if (!this._page) throw new Error('Browser not initialized. Run init tool first.');
  
    // Return cached value if still valid
    const now = Date.now();
    if (this.editorCache && (now - this.cacheTimestamp) < this.CACHE_TTL) {
      return this.editorCache;
    }
  
    const pattern = await this._page.evaluate(() => {
      const editor = document.querySelector('.cm-content') as HTMLElement;
      if (editor) {
        const view = (editor as any).__view;
        if (view && view.state && view.state.doc) {
          return view.state.doc.toString();
        }
      }
      return '';
    });
  
    // Update cache
    this.editorCache = pattern;
    this.cacheTimestamp = now;
  
    return pattern;
  }

• src/server/EnhancedMCPServerFixed.ts:148-152 (registration)

  Registration of 'get_pattern' tool in getTools() array, including schema and description

  {
    name: 'get_pattern',
    description: 'Get current pattern code',
    inputSchema: { type: 'object', properties: {} }
  },

• src/server/EnhancedMCPServerFixed.ts:623-635 (helper)

  Helper method getCurrentPatternSafe() that provides fallback for uninitialized browser state

  private async getCurrentPatternSafe(): Promise<string> {
    if (!this.isInitialized) {
      // Return the last generated pattern if available
      const lastPattern = Array.from(this.generatedPatterns.values()).pop();
      return lastPattern || '';
    }
    
    try {
      return await this.controller.getCurrentPattern();
    } catch (e) {
      return '';
    }
  }

• src/server/EnhancedMCPServerFixed.ts:151-151 (schema)

  Input schema for get_pattern tool: empty object (no parameters required)

  inputSchema: { type: 'object', properties: {} }