EuConquisto Composer MCP

# JIT Architecture Deep Dive - Code Structure Analysis **Date**: January 12, 2025 **Version**: v5.1.0 JIT Analysis **Purpose**: Comprehensive understanding of JIT implementation architecture for future development --- ## 🏗️ JIT File Structure Discovery ### Key Finding: Hybrid Architecture ⚡ The JIT implementation uses a **hybrid architecture** combining: - **Standalone MCP Server**: `/dist/browser-automation-api-jit-v5.1.0.js` - **Modular Tool Imports**: Imports from `/src/tools/` directory - **Delegated Execution**: MCP handlers delegate to imported tool classes ### Architecture Components #### 1. Main JIT Server (`/dist/browser-automation-api-jit-v5.1.0.js`) ```javascript // File Location: /dist/browser-automation-api-jit-v5.1.0.js // Last Modified: July 11 01:25 (Pre-fixes) // Size: 20,633 bytes // Type: Standalone MCP Server with imports // Key Imports (Lines 22-30): import { createSmartGuidanceTool } from '../src/tools/get-smart-guidance.js'; import { createContentWidgetAnalyzer } from '../src/tools/analyze-content-for-widgets.js'; import { createWidgetRequirementsTool } from '../src/tools/get-widget-requirements.js'; import { createLessonDataValidator } from '../src/tools/validate-lesson-data.js'; import { createComposerFormatter } from '../src/tools/format-for-composer.js'; import { createCompositionAPISaver } from '../src/tools/save-composition-api.js'; import { createCompositionEditorOpener } from '../src/tools/open-composition-editor.js'; ``` #### 2. Tool Registration Pattern ```javascript // 7 JIT Tools Registered (Lines 82-191): { name: 'get_smart_guidance', // STEP 1: Lightweight guidance name: 'analyze_content_for_widgets', // STEP 2: Content analysis name: 'get_widget_requirements', // STEP 3: JIT requirements name: 'validate_lesson_data', // STEP 4: Auto-fix validation name: 'format_for_composer', // STEP 5: Minimal transformation name: 'save_composition_api', // STEP 6: API save name: 'open_composition_editor' // STEP 7: Navigation } ``` #### 3. Handler Delegation Pattern ```javascript // Handler Pattern (Lines 194-240): this.server.setRequestHandler(CallToolRequestSchema, async (request) => { switch (request.params.name) { case 'validate_lesson_data': return this.validateLessonData(request.params.arguments); // Delegates to method case 'open_composition_editor': return this.openCompositionEditor(request.params.arguments); // Delegates to method } }); // Method Implementation Pattern: async validateLessonData(args) { // ... MCP wrapper logic ... const validationResult = await this.lessonDataValidator.validateLessonData(lessonData); // ↑ Delegates to imported tool class } async openCompositionEditor(args) { // ... MCP wrapper + browser setup ... const openResult = await this.compositionEditorOpener.openCompositionEditor(compositionUid, page); // ↑ Delegates to imported tool class } ``` ### 🔄 Change Propagation Flow ``` 1. Source Change: /src/tools/validate-lesson-data.js (Modified ✅) ↓ 2. Import: JIT file imports from ../src/tools/ (Active ✅) ↓ 3. Class Creation: this.lessonDataValidator = createLessonDataValidator() (Active ✅) ↓ 4. Delegation: validateLessonData() → this.lessonDataValidator.validateLessonData() (Active ✅) ↓ 5. Execution: Should include fixes... (❓ Investigation needed) ``` --- ## 🔧 Implementation Patterns for Future Development ### 1. Adding New JIT Tools **Pattern**: Hybrid registration approach ```javascript // Step 1: Create tool in /src/tools/new-tool.js export class NewTool { async execute(args) { /* implementation */ } } export function createNewTool() { return new NewTool(); } // Step 2: Import in JIT file import { createNewTool } from '../src/tools/new-tool.js'; // Step 3: Initialize in constructor this.newTool = createNewTool(); // Step 4: Register in tool list { name: 'new_tool', description: 'Tool description', inputSchema: { /* schema */ } } // Step 5: Add handler case case 'new_tool': return this.newToolMethod(request.params.arguments); // Step 6: Implement delegation method async newToolMethod(args) { const result = await this.newTool.execute(args); return { content: [{ type: 'text', text: JSON.stringify(result, null, 2) }] }; } ``` ### 2. Modifying Existing Tools **Pattern**: Direct source modification (should propagate automatically) ```javascript // Modify: /src/tools/existing-tool.js // Effect: Changes propagate through import → class creation → delegation // Restart: Required for changes to take effect ``` ### 3. JIT Server Configuration **Pattern**: Centralized initialization ```javascript // Constructor pattern (Lines 34-65): constructor() { this.server = new Server(/* config */); // Initialize all tools this.toolName = createTool(); // Load external dependencies this.loadJwtToken(); this.setupHandlers(); } ``` --- ## 🎯 Critical Insights for Development ### 1. **Change Deployment Strategy** - ✅ **Source Changes**: Modify `/src/tools/` files directly - ⚠️ **Restart Required**: Changes need server restart to take effect - ❌ **No Build Step**: No compilation needed (ES modules) - 🔄 **Hot Reload**: Not implemented - manual restart required ### 2. **Debugging Strategy** - **Log Source**: Check MCP server console output - **Error Isolation**: Each tool has individual error handling - **Debug Mode**: Enable via environment variables - **Testing**: Modify source → restart → test ### 3. **Architecture Benefits** - ✅ **Modularity**: Tools can be developed independently - ✅ **Maintainability**: Clear separation of concerns - ✅ **Testability**: Individual tools can be unit tested - ✅ **Extensibility**: Easy to add new tools following patterns ### 4. **Architecture Limitations** - ⚠️ **Restart Required**: No hot reload for changes - ⚠️ **Import Dependencies**: Relative path dependencies - ⚠️ **Single Distribution**: All tools bundled in one server - ⚠️ **Version Sync**: Source and dist versions must align --- ## 📊 Change Impact Analysis ### Current Bug Fix Status **Problem Identified**: Changes to `/src/tools/` should be active but aren't taking effect **Possible Causes**: 1. **Caching Issue**: Node.js module cache preventing reload 2. **File System Issue**: Changes not properly saved 3. **Import Path Issue**: Incorrect relative path resolution 4. **Runtime Issue**: Error in modified code preventing execution **Investigation Required**: - ✅ Verify file timestamps and content - ✅ Test import resolution - ✅ Check for runtime errors - ✅ Force cache clear and restart --- ## 🔮 Future Architecture Recommendations ### 1. Development Workflow Improvements - **Hot Reload**: Implement file watching and automatic restart - **Build Pipeline**: Add optional compilation step for validation - **Testing Framework**: Automated testing for tool changes - **Debug Mode**: Enhanced logging and error reporting ### 2. Code Organization Enhancements - **Tool Versioning**: Version individual tools independently - **Configuration Management**: Centralized configuration system - **Plugin Architecture**: Dynamic tool loading/unloading - **Error Boundaries**: Better error isolation between tools ### 3. Documentation Standards - **Tool Documentation**: Standardized documentation for each tool - **Change Log**: Track changes and their impact - **Architecture Diagrams**: Visual representation of data flow - **Performance Metrics**: Track tool execution times and efficiency --- ## ✅ Action Items for Current Issue Based on this analysis, the next steps for resolving the bug fix deployment: 1. **✅ Verify Source Changes**: Confirm modifications are in place 2. **✅ Force Server Restart**: Clear any caching issues 3. **✅ Test Import Resolution**: Verify tool loading 4. **✅ Runtime Debugging**: Check for execution errors 5. **📚 Document Process**: Update development guidelines --- **Architecture Analysis Status**: ✅ **COMPLETE** **Key Finding**: Hybrid architecture with proper delegation chain **Next Step**: Force cache clear and restart to deploy fixes **Confidence**: High - Architecture supports the intended changes