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# Retrieval Applies under `crates/wenlan-core/src/retrieval/` in addition to the root and `crates/wenlan-core/AGENTS.md` instructions. - Keep retrieval changes on the existing quick, deep, expanded, or prototype seam; do not make an internal core caller silently inherit handler-only reranking. - Preserve query scope and disclosure filters when a new channel can surface rows. - Use focused ranking/substrate controls before expensive answer-quality evals. - Feature-flag defaults, wiring, known hazards, and measurement receipts live in `REFERENCE.md`. Read only the entries relevant to the task.