Deepcontext

You'd reach for this when you need Claude to understand your codebase structure beyond simple file reading. It indexes your code semantically, so you can ask questions like "where do we handle authentication" or "find all the database query patterns" and get meaningful results instead of grep output. Think of it as giving Claude a mental map of your repository. The semantic search means it understands intent and relationships between code, not just keyword matching. Useful when onboarding to unfamiliar projects, refactoring across multiple files, or trying to trace how data flows through your system without manually following imports.