Wiki Retrieve

If your vault has grown past 50 pages and you're tired of Claude reading five irrelevant documents before finding the one paragraph that answers your question, this replaces the old hot→index→drill read order with chunk-level hybrid retrieval. It implements Anthropic's September 2024 Contextual Retrieval paper: contextual prefix generation, BM25 sparse search, and cosine reranking. One-time setup costs about $3.60 per 100 pages with Haiku plus prompt caching, or you can run the fully local tier with synthetic prefixes and Ollama. The smart part is it's opt-in and feature-gated, so wiki-query and autoresearch detect it and upgrade themselves automatically while older skills keep working. If you're running deep research sessions, the quality jump is real.