This skill should be used when the user asks to "capture input", "save to RAG memory", "index a file", "store reference material", "capture document for context", or "add to knowledge base". It captures session inputs as RAG memory files with frontmatter, abstract, key takeaways, and full content. Workspace-aware routing sends captures to the active workspace's rag/ folder. Use this skill whenever the user mentions capture, RAG, memory indexing, or knowledge base storage.