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Apr 30, 2026
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docs: sync Haystack API reference on Docusaurus #11230

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8 changes: 7 additions & 1 deletion docs-website/reference/haystack-api/retrievers_api.md
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Original file line number Diff line number Diff line change
Expand Up @@ -877,7 +877,10 @@ __init__(
retrievers: dict[str, TextRetriever],
filters: dict[str, Any] | None = None,
top_k: int = 10,
max_workers: int = 4
max_workers: int = 4,
join_mode: Literal[
"concatenate", "reciprocal_rank_fusion"
] = "reciprocal_rank_fusion"
) -> None
```

Expand All @@ -890,6 +893,9 @@ Create the MultiRetriever component.
- **filters** (<code>dict\[str, Any\] | None</code>) – A dictionary of filters to apply when retrieving documents.
- **top_k** (<code>int</code>) – The maximum number of documents to return per retriever.
- **max_workers** (<code>int</code>) – The maximum number of threads to use for parallel retrieval.
- **join_mode** (<code>Literal['concatenate', 'reciprocal_rank_fusion']</code>) – How to merge results from multiple retrievers. Available modes:
- `concatenate`: Combines all results into a single list and deduplicates.
- `reciprocal_rank_fusion`: Deduplicates and assigns scores based on reciprocal rank fusion.

#### warm_up

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