docs: Add unsupported search mode info about FAISS (#3089)

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Varsha 2025-08-10 16:34:34 -07:00 committed by GitHub
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@ -12,6 +12,18 @@ That means you'll get fast and efficient vector retrieval.
- Lightweight and easy to use
- Fully integrated with Llama Stack
- GPU support
- **Vector search** - FAISS supports pure vector similarity search using embeddings
## Search Modes
**Supported:**
- **Vector Search** (`mode="vector"`): Performs vector similarity search using embeddings
**Not Supported:**
- **Keyword Search** (`mode="keyword"`): Not supported by FAISS
- **Hybrid Search** (`mode="hybrid"`): Not supported by FAISS
> **Note**: FAISS is designed as a pure vector similarity search library. See the [FAISS GitHub repository](https://github.com/facebookresearch/faiss) for more details about FAISS's core functionality.
## Usage