Zaious b53de5acd2 fix: capture query embedding before retriever callback and guard empty source_nodes ... LangChain: Add on_chain_start to capture query embedding before on_retriever_end fires in RetrievalQA flow. on_llm_start retained as fallback for non-chain invocations. LlamaIndex: Double guard on source_nodes — check both attribute existence AND non-empty list before computing average ΔS, preventing ZeroDivisionError on responses without retrieved nodes. Addresses Codex automated review feedback		2026-03-10 09:14:53 +08:00
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langchain	fix: capture query embedding before retriever callback and guard empty source_nodes	2026-03-10 09:14:53 +08:00
llamaindex	fix: capture query embedding before retriever callback and guard empty source_nodes	2026-03-10 09:14:53 +08:00