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Grade, rewrite and search again

15 min applied20 min research2 curated resources

Build the corrective loop as a LangGraph graph: retrieve → grade each chunk (relevant yes/no, a small LLM prompt) → if too few relevant chunks, rewrite the query and search again (max 2 retries) → generate. This fixes many 'found the wrong pages' failures.

Builds on: 4.7 Improve

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