Agent Skills: extract-knowledge

Extracts reusable patterns, conventions, and knowledge from existing artifacts (code, docs, prompts, conversations) into structured reference materials. The critical skill is PATTERN RECOGNITION — identifying what's reusable beyond the source material, actionable enough to guide future work, and structured for easy retrieval. Used when learning from examples to create templates, guidelines, or patterns; or when distilling a conversation into a teachable refinement.