feat: Add reranker battery with Cohere and custom reranker support #16
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pingSubhajit
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Jan 9, 2026
* fix: deep merge file not present after installation (#13) * feat: robust logging for pdf:text-layer extractor (#14) * docs: new supported runtimes page in the docs * feat: Add unrag doctor command for installation validation and troubleshooting (#15) * chore: add spec for eval harness feature * feat: Add reranker battery with Cohere and custom reranker support (#16) * chore: bump patch version & updated new badge
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Summary
This PR introduces the reranker battery, a new feature that enables two-stage retrieval with optional reranking for improved search precision. It includes Cohere integration as the default provider and support for custom rerankers.
Changes
New Features
Reranker Battery (
packages/unrag/registry/rerank/)createCohereReranker()for Cohere rerank-v3.5 model integration with configurable model, API key, and batch sizecreateCustomReranker()for custom reranker implementationsrerank()method to the context engine for post-retrieval rerankingReranker,RerankerRerankArgs,RerankerRerankResult,CohereRerankerConfig,CustomRerankerConfigCLI Updates
unrag addcommand to supportbatterytype installationspackageJson.tsDocumentation
/docs/batteries/section with comprehensive reranker documentationTests
Added comprehensive test coverage for reranking functionality:
core-rerank-basic.test.ts- Basic reranking operationscore-rerank-missing-reranker.test.ts- Error handling when reranker is not configuredcore-rerank-missing-text.test.ts- Handling of chunks with missing text contentcore-rerank-stability.test.ts- Stability and ordering guaranteesInstallation
bunx unrag@latest add battery reranker