Local-first knowledge cache — full-text and hybrid semantic search over every page wigolo has already fetched, crawled, or searched. Use before any web request: cached hits return instantly and free. Triggers when the user says "check the cache", "have we seen this", "what's on disk", "search what I've already fetched", "cache stats", or "what changed since I last looked". Also clears matching entries and re-checks cached URLs for changes.