AI BriefingWitchcraft: Local Semantic Search
·2026.05.19 01:00
Key point
Witchcraft has been released, supporting fast local semantic search using SQLite without a separate vector DB.
Details
Witchcraft is an open-source project developed at Dropbox that reimplements Stanford's XTR-Warp semantic search engine in Rust. It uses a single SQLite file as its backend, allowing it to run independently on the client side without a separate API key, vector database, or chunking strategy.
Key features include:
- High performance: On an Apple Macbook Pro M2 Max, it achieves an end-to-end search latency of 20ms (p.95) on NFCorpus, more than 2x faster than existing XTR-WARP.
- Pickbrain CLI: Indexes session history and documents from Claude Code and OpenAI Codex to support fast search.
- AI agent memory: Through the
/pickbrainskill, it helps AI agents instantly recall previous conversation context to resume sessions.
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