spec-to-pbt

Extract learnings, discoveries, design implications, and follow-up actions after implementation work, and save the result under docs/implementation-retrospectives/ by default. Use when the user asks what was learned from a change, asks for a reflection after coding, wants to capture insights or discoveries from implementation, wants to record engineering learnings, asks for a retrospective, asks for findings/insights/洞察/学び/発見 from completed work, or when implementation has just finished and it would help to turn the work into reusable engineering knowledge even if the user did not explicitly name the skill.