Retrieve Vault Context

Preferred order:

1. If the DeepOrbit MCP server is available, call rag_query or rag_search.
2. Otherwise run deeporbit --vault "<vault>" rag "<query>".
3. Add --semantic only when ChromaDB is installed or the user asks for semantic retrieval.
4. If the CLI is unavailable, search Markdown directly and disclose the fallback.

Every query refreshes changed and deleted files before retrieval. Cite results with [[Title]] and their vault-relative paths. Distinguish retrieved facts from general knowledge and never invent note content.