March 2025: Delivered a set of API reliability, observability, and feature-full improvements for traPtitech/traQ, focusing on cleaner control flow, robust error handling, and enhanced test coverage. These changes reduce runtime errors, improve diagnosability, and enable smoother file management and channel operations for end users and developers.

February 2025 (traPtitech/traQ) monthly summary: - Key features delivered: • GetChannels API error handling and response standardization: ensure 404 Not Found for non-existent channels and align response properties across GetChannels. • GetChannels API subchannel support in path queries: API now returns subchannels when a path query includes a parent channel; added a test helper to create subchannels and updated tests to cover path→channel mappings. - Major bugs fixed: • Correct 404 behavior for missing channels and standardized response structure; enhanced test coverage for path-based queries. - Overall impact and accomplishments: • Improved API reliability and developer experience; reduced integration friction; stronger regression safety via tests; clearer API semantics for error cases. - Technologies/skills demonstrated: • API design and error handling standardization; test-driven development and test utilities; regression testing and commit hygiene.