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    ---
    title: apogee-ai-search
    description: Hybrid retrieval (BM25 + dense + reranker) over `apogee-core` index abstractions.
    ---

    # apogee-ai-search

    > Hybrid retrieval (BM25 + dense + reranker) over `apogee-core` index abstractions.

    ## What is in this package

    | Capability | What you get |

| --- | --- | | BM25 | Lexical retrieval | | Dense | Vector retrieval (any embedder from apogee-ai-providers) | | Reranker | Cross-encoder reranker | | Hybrid | Score fusion (RRF / linear / learned) |

    ## Install

    ```bash
    pip install apogee-ai-search
    ```

    ## Where it fits

    This package is part of the [Apogee Framework](/framework/) ecosystem. It can be used:

    - **Standalone** — install and use directly via `pip` (or `npm` for `@apogee/ai-ui-react`).
    - **As a plugin** — generated projects detect it and register matching CLI subcommands automatically.

    See the [framework's modules overview](/framework/modules/overview/) for how all 28 packages fit together.

    ## Read next

    - [Installation](getting-started/installation.md)
    - [Quickstart](getting-started/quickstart.md)
    - [Reference](reference/index.md)