Cohere reranker

Reorders retrieved memories using Cohere's hosted Rerank API (v2), selected via RERANKER_PROVIDER=cohere. Reranking reorders retrieved memories by relevance after hybrid search.

Enable it

RERANKER_PROVIDER=cohere
COHERE_API_KEY=<your-cohere-key>

Configuration

Variable	Default	Description
RERANKER_PROVIDER	none	Set to cohere.
COHERE_API_KEY	none	Cohere API key sent as a bearer token.

The rerank model defaults to rerank-english-v3.0.

Notes

• Calls Cohere's hosted API at https://api.cohere.com/v2/rerank; requires network access and a valid key.
• If COHERE_API_KEY is unset, a warning is logged at init and rerank calls fail at runtime.
• Results are sorted by relevance score defensively, regardless of API ordering.