- BM25 ranking via SQLite FTS5 bm25() function
- Query preprocessor with wildcard expansion and special char escaping
- Library search with composite scoring (name match, trust score, snippet count)
- Trust score computation from stars, coverage, and source type
- Response formatters for library and snippet results
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
