WFGY/ProblemMap/GlobalFixMap/RAG_VectorDB
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RAG + VectorDB — Global Fix Map

A hub to stabilize retrieval pipelines at the embedding ↔ vector store layer.
Use this folder when retrieval looks healthy on paper but citations, meaning, or stability collapse in practice.
Every fix is structural, measurable, and store-agnostic.


Quick routes to per-page guides


When to use this folder

  • High similarity but wrong meaning.
  • Correct facts exist in the corpus but never surface.
  • Citations inconsistent or missing across runs.
  • Token count spikes after deploy without corpus changes.
  • Index “looks fine” yet coverage stays flat.
  • Retrieval quality drifts after updates or merges.
  • Hybrid retrievers underperform single retrievers.
  • Duplicate or poisoned vectors destabilize the store.

Acceptance targets (store-agnostic)

  • ΔS(question, retrieved) ≤ 0.45
  • Coverage of target section ≥ 0.70
  • λ stays convergent across 3 paraphrases and 2 seeds
  • E_resonance flat across long windows
  • Index skew ≤ 5% after updates

60-second checklist

  1. Lock metric and analyzer (cosine vs L2 vs dot).
  2. Normalize embeddings (L2 norm, zero-mean scaling).
  3. Align tokenization and casing with retriever.
  4. Enforce chunking ↔ embedding contract.
  5. Probe ΔS across paraphrases. If ≥0.60, escalate.
  6. Audit duplication and contamination (hash and dedupe).
  7. Monitor index skew after every update.
  8. Verify hybrid retriever weights explicitly.

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