March 2026 monthly summary: Delivered two core feature enhancements across two repositories with tests and compatibility improvements, driving UX gains, reliability, and integration flexibility. Key outcomes: (1) File Upload Name Flexibility Enhancement in dify: allow punctuation in filenames (reject only path separators), with tests validating safe punctuation. (2) Flexible Model Selection for third-party proxies in dify-official-plugins: add customizable-model support, 1M context for Claude Opus 4.6, and updated credential validation; version bumped to 0.3.7. (3) Overall impact: smoother user uploads, expanded model-compatibility for enterprise proxies, reduced proxy failures, and a maintainable plugin architecture. Technologies/skills: Python, test-driven development, API compatibility, credential validation, semantic versioning.