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When langchain.llm cache is enabled and a cache hit occurs, the retrieval QA streaming callbacks do not send…

When langchain.llm cache is enabled and a cache hit occurs, the retrieval QA streaming callbacks do not send…: a task in LegoFlow-SWE (Harbor dataset). This affects the on chain end method of the base retrieval QA streaming callbacks (regular, websocket, and JSON variants). The JSON callback, for…

The task

This affects the `on_chain_end` method of the base retrieval QA streaming callbacks (regular, websocket, and JSON variants). The JSON callback, for instance, should emit an `AnswerStreamingJSONResponse` with the cached answer, but currently it does not.

Part of Lego-X/LegoFlow-SWE.