Index (or re-index) a local directory for semantic search. Walks recursively, skips .git/node_modules/.venv/etc and files >2MB, and skips any file whose content is unchanged since the last index (cheap: a whole-file hash check before touching the embedding model). Files that were indexed before but no longer exist under path are removed from the index.

Credential-shaped file names (.env, id_rsa, credentials.json, .netrc,
*.pem, ...) are never indexed. If LOCAL_NOTES_SEARCH_ALLOWED_ROOTS is
set, `path` must resolve inside one of its entries; unset (the default)
means any readable directory is indexable.

Semantic search across everything indexed so far. Returns the top matching chunks with file path, line range, and a relevance-ordered snippet - not just a bag of file names.

Ask a question in natural language about your indexed files. Retrieves the most relevant chunks (same retrieval as search_notes) and asks an LLM (Groq, then Mistral fallback - needs GROQ_API_KEY or MISTRAL_API_KEY) to synthesize an answer grounded ONLY in those chunks, with file:line sources. Without either key configured, degrades to returning the raw retrieved chunks with a note that no LLM is available - never fails outright just because synthesis isn't possible.

Lists what's currently in the index - file path, chunk count, last indexed time. Useful to check what's covered before searching, or to debug a stale/missing result.

Removes every indexed file/chunk under path from the index. The index is persistent local state in ~/.local-notes-search/ (or LOCAL_NOTES_SEARCH_DB) - this is how you clean it up without deleting the whole database file.