* 🧪 test: Add reconnection storm regression tests for MCPConnection
Introduced a comprehensive test suite for reconnection storm scenarios, validating circuit breaker, throttling, cooldown, and timeout fixes. The tests utilize real MCP SDK transports and a StreamableHTTP server to ensure accurate behavior under rapid connect/disconnect cycles and error handling for SSE 400/405 responses. This enhances the reliability of the MCPConnection by ensuring proper handling of reconnection logic and circuit breaker functionality.
* 🔧 fix: Update createUnavailableToolStub to return structured response
Modified the `createUnavailableToolStub` function to return an array containing the unavailable message and a null value, enhancing the response structure. Additionally, added a debug log to skip tool creation when the result is null, improving the handling of reconnection scenarios in the MCP service.
* 🧪 test: Enhance MCP tool creation tests for cache and throttle interactions
Added new test cases for the `createMCPTool` function to validate the caching behavior when tools are unavailable or throttled. The tests ensure that tools are correctly cached as missing and prevent unnecessary reconnects across different users, improving the reliability of the MCP service under concurrent usage scenarios. Additionally, introduced a test for the `createMCPTools` function to verify that it returns an empty array when reconnect is throttled, ensuring proper handling of throttling logic.
* 📝 docs: Update AGENTS.md with testing philosophy and guidelines
Expanded the testing section in AGENTS.md to emphasize the importance of using real logic over mocks, advocating for the use of spies and real dependencies in tests. Added specific recommendations for testing with MongoDB and MCP SDK, highlighting the need to mock only uncontrollable external services. This update aims to improve testing practices and encourage more robust test implementations.
* 🧪 test: Enhance reconnection storm tests with socket tracking and SSE handling
Updated the reconnection storm test suite to include a new socket tracking mechanism for better resource management during tests. Improved the handling of SSE 400/405 responses by ensuring they are processed in the same branch as 404 errors, preventing unhandled cases. This enhances the reliability of the MCPConnection under rapid reconnect scenarios and ensures proper error handling.
* 🔧 fix: Implement cache eviction for stale reconnect attempts and missing tools
Added an `evictStale` function to manage the size of the `lastReconnectAttempts` and `missingToolCache` maps, ensuring they do not exceed a maximum cache size. This enhancement improves resource management by removing outdated entries based on a specified time-to-live (TTL), thereby optimizing the MCP service's performance during reconnection scenarios.
* 📝 docs: Add AGENTS.md for project structure and coding standards
- Introduced AGENTS.md to outline project workspaces, coding standards, and development commands.
- Defined workspace boundaries for backend and frontend development, emphasizing TypeScript usage.
- Established guidelines for code style, iteration performance, type safety, and import order.
- Updated CONTRIBUTING.md to reference AGENTS.md for coding standards and project conventions.
- Modified package.json to streamline build commands, consolidating frontend and backend build processes.
* chore: Update build commands and improve smart reinstall process
- Modified AGENTS.md to clarify the purpose of `npm run smart-reinstall` and other build commands, emphasizing Turborepo's role in dependency management and builds.
- Updated package.json to streamline build commands, replacing the legacy frontend build with a Turborepo-based approach for improved performance.
- Enhanced the smart reinstall script to fully delegate build processes to Turborepo, including cache management and dependency checks, ensuring a more efficient build workflow.
