Cs Learn

Captures lessons learned and pitfalls from your development work into searchable markdown files in `.codestable/compound/`. Two tracks: pitfalls (what broke and why) and knowledge (better practices you discovered). Triggers when you say "沉淀知识" or "learning", or automatically at the end of feature/issue workflows when cs-feat-accept or cs-issue-fix ask if you want to record what happened. The interview is intentionally brief, one question at a time, and skips sections if you say "nothing to add". What makes this useful is it distinguishes between specs (what you built) and learning docs (what you figured out the hard way), so teams stop solving the same problem twice. Checks for duplicates before creating new files and can update existing learning docs instead.