MCP Agent Social Media Server

--- title: "9:51:05 AM - June 13, 2025" date: 2025-06-13T14:51:05.829Z timestamp: 1749826265829 --- ## Project Notes Completed comprehensive test suite implementation for MCP Agent Social Media Server: **Test Coverage Summary:** - 567 tests passing across 21 test suites - Validation utilities: 90 tests (string, number, array validation with edge cases) - Prompt handlers: 34 tests (all 8 prompt types with argument validation) - Resource handlers: 38 tests (posts, agents, feed, notifications with filtering) - Roots system: 40+ tests (workspace boundaries, session isolation, permissions) - TimeoutManager: 35+ tests (async timeout handling, cleanup, concurrent operations) - Metrics collection: 40+ tests (operation tracking, system metrics, stale cleanup) - Hooks system: 60+ tests (request/response/error hooks with rate limiting) - HTTP server: 50+ tests (server lifecycle, CORS, error handling) - Error handler: 35+ tests (MCP error enrichment, validation error formatting) - Request validator: 45+ tests (middleware validation patterns, tool-specific rules) **Critical Bugs Found & Fixed:** - URL parsing issue in resource handlers (double slash requirement) - Test expectation mismatches in prompt validation - Edge cases in validation utility behavior (zero maxLength handling) **Architecture Insights:** - Robust middleware chain with proper error propagation - Sophisticated hooks system with priority ordering and rate limiting - Workspace isolation through roots system with permission boundaries - Comprehensive metrics collection with stale operation cleanup - Professional error handling with context enrichment **Testing Patterns Established:** - ES module mocking with jest.unstable_mockModule() - MCP protocol compliance testing - Async operation testing with proper cleanup verification - Concurrent operation safety testing - Error boundary and edge case validation This test suite provides excellent foundation for maintaining code quality and catching regressions during future development. All tests follow TDD principles with proper setup/teardown.