Compare agent skills before installing.

Entry point and router for the lyric writing library (作词工作流与路由). The two workflows that fork at the very first question - music-first versus lyrics-first - and their different stage tables, which skill to load for which task, the full-library boundary table, the LYR-SPEC gate rules, the bidirectional interface with the arrangement library, and the three testing devices. Load this FIRST for any lyric writing request, before deciding which other skill to read. Use when starting a lyric, when fitting words to an existing melody or a melody to existing words, when unsure which skill owns a question, when a draft fails lint, or when handing work to another library. 作词、歌词、填词、工作流、路由、该读哪个 skill、LYR-SPEC、先曲后词、先词后曲。

Implement work from an approved spec or ticket set, run focused and full tests, invoke code review, and commit the result to the current branch.