Local Utilities MCP Server

# Think Tool MCP Implementation Plan ## Product Description The Think Tool is a lightweight MCP utility designed to help users record, retrieve, and analyze thoughts during development or problem-solving sessions. It provides an in-memory thought storage system with timestamp tracking and basic analytics capabilities. ### Core Features - Record timestamped thoughts - Retrieve all recorded thoughts - Clear thought history - Generate thought statistics (count, average length, timeline) ### Technical Specifications - Implementation Language: TypeScript - Storage: In-memory (non-persistent) - Protocol: MCP (Message Control Protocol) - Module Type: ESM (ECMAScript Modules) ## Implementation Checklist ### 1. Project Setup and Type Definitions ✅ - [x] Create MCP type definitions (`src/types/mcp.ts`) - [x] Define `MCPRequest` interface - [x] Define `MCPResponse` interface - [x] Ensure proper TypeScript configuration ### 2. Core Implementation ✅ - [x] Create Think Tool implementation (`src/mcp/think.ts`) - [x] Define `Thought` interface - [x] Define `ThoughtStats` interface - [x] Implement `ThinkTool` class - [x] Add memory storage for thoughts - [x] Implement timestamp generation - [x] Add type-safe request handling ### 3. Command Implementation ✅ - [x] Implement `think` command - [x] Add parameter validation - [x] Implement thought storage - [x] Add success/error responses - [x] Implement `get_thoughts` command - [x] Add safe array copying - [x] Implement response formatting - [x] Implement `clear_thoughts` command - [x] Add memory cleanup - [x] Implement success response - [x] Implement `get_thought_stats` command - [x] Add statistics calculation - [x] Implement null handling - [x] Add response formatting ### 4. Integration ✅ - [x] Update MCP index file (`src/mcp/index.ts`) - [x] Add Think Tool export - [x] Ensure proper module paths - [x] Verify ESM compatibility ### 5. Documentation ✅ - [x] Create comprehensive README (`src/mcp/README.md`) - [x] Add command documentation - [x] Include workflow diagrams - [x] Add error handling documentation - [x] Include example usage - [x] Document security considerations - [x] Add performance characteristics ### 6. Testing Plan ✅ - [x] Unit Tests - [x] Test thought recording - [x] Test thought retrieval - [x] Test thought clearing - [x] Test statistics calculation - [x] Test error handling - [x] Integration Tests - [x] Test MCP protocol compliance - [x] Test response formatting - [x] Test edge cases ### 7. Future Enhancements (Backlog) - [ ] Add thought categories/tags - [ ] Implement thought search - [ ] Add persistent storage option - [ ] Implement thought export - [ ] Add thought editing capability - [ ] Implement thought prioritization ## Security Considerations 1. Input Validation - All thought content is validated - Parameters are type-checked - Error messages are sanitized 2. Memory Management - In-memory storage with no persistence - Clear memory on server restart - No sensitive data storage 3. Access Control - Relies on MCP server security - No additional authentication layer - No direct file system access ## Performance Targets - Thought Recording: O(1) - Thought Retrieval: O(1) - Statistics Calculation: O(n) - Memory Usage: Linear growth - Response Time: < 50ms for all operations ## Success Metrics 1. Functionality - All commands work as documented - Error handling covers all edge cases - Type safety is maintained 2. Code Quality - Follows TypeScript best practices - Maintains MCP protocol standards - Passes all linter checks 3. Documentation - Complete API documentation - Clear usage examples - Comprehensive workflow diagrams ## Review Checklist - [x] Code follows project structure - [x] All features implemented - [x] Documentation complete - [x] Error handling in place - [x] Type definitions accurate - [x] Tests written and passing - [x] Performance requirements met - [x] Security considerations addressed