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Is your feature request related to a problem? Please describe.

Hi maintainers,

GraphRAG pipelines introduce additional failure surfaces beyond classic RAG, such as entity linking errors, graph construction skew, path based retrieval collapse, and context assembly issues.

Proposal (doc only, minimal):

1. A short “GraphRAG Failure Modes” checklist, focused on practical symptoms and quick checks
2. A “Debug Playbook” section, example: entity mismatch, graph fragmentation, wrong path retrieval, missing grounding, overconfident generation

This is intended to help users debug faster and report higher quality issues.

If you like the idea, I can submit a PR with an initial doc page that follows your current documentation style.
Which directory would you prefer?

Describe the solution you'd like

No response

Additional context

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