Create ops_debug_playbook.md

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+# RAG ops debug playbook
+
+A fast triage guide for incidents after you change chunking, OCR, embedding, or index settings. The goal is to localize the failing layer in minutes and apply a reversible fix.
+
+## Open these first
+- Chunk ids and stability: [chunk_id_schema.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/GlobalFixMap/Chunking/chunk_id_schema.md)
+- Title tree numbering: [title_hierarchy.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/GlobalFixMap/Chunking/title_hierarchy.md)
+- Section boundary rules: [section_detection.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/GlobalFixMap/Chunking/section_detection.md)
+- Typed blocks (code, tables, figures): [code_tables_blocks.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/GlobalFixMap/Chunking/code_tables_blocks.md)
+- PDF layout and OCR normalization: [pdf_layouts_and_ocr.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/GlobalFixMap/Chunking/pdf_layouts_and_ocr.md)
+- Rebuild without breaking citations: [reindex_migration.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/GlobalFixMap/Chunking/reindex_migration.md)
+- Eval harness and gates: [eval_rag_precision_recall.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/GlobalFixMap/Chunking/eval_rag_precision_recall.md)
+- Live probes and alerts: [live_monitoring_rag.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/GlobalFixMap/Chunking/live_monitoring_rag.md)
+- Retrieval trace schema: [retrieval-traceability.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/retrieval-traceability.md)
+- Payload contracts: [data-contracts.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/data-contracts.md)
+- Reranker controls: [rerankers.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/rerankers.md)
+- Similarity vs meaning: [embedding-vs-semantic.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/embedding-vs-semantic.md)
+- Prompt injection: [prompt-injection.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/prompt-injection.md)
+- Visual recovery map: [rag-architecture-and-recovery.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/rag-architecture-and-recovery.md)
+
+## Golden acceptance
+- ΔS(question, retrieved) ≤ 0.45
+- Coverage ≥ 0.70 to the target section
+- λ_observe convergent across three paraphrases and two seeds
+- Citation offsets within 30 bytes of the ground block
+
+## Symptom to fix map
+
+| Symptom | Quick probe | Likely root | Open this | Minimal fix |
+|---|---|---|---|---|
+| Coverage drops after index rebuild | Check `index_hash` change with same build id | Bad boot sequence or partial ingest | [reindex_migration.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/GlobalFixMap/Chunking/reindex_migration.md) | Rebuild with frozen normalizers, fence ingestion, re-point alias after eval pass |
+| Citations point to wrong offsets | Validate 30 byte window around cited chunk | OCR or layout normalization drift | [pdf_layouts_and_ocr.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/GlobalFixMap/Chunking/pdf_layouts_and_ocr.md) | Re-run layout pass and regenerate chunk ids with stable scheme |
+| High similarity yet wrong meaning | Compare ΔS to anchor section and to decoy | Metric or analyzer mismatch | [embedding-vs-semantic.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/embedding-vs-semantic.md) | Switch metric or normalize text, add rerank pass |
+| Answers flip between reruns | Three paraphrase test and λ flip count | Prompt header reorder or rerank shuffle | [rerankers.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/rerankers.md) | Lock header order and rerank seeds, clamp variance |
+| Tables or code never cited | Check block `type` in top k | Block typing lost during chunking | [code_tables_blocks.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/GlobalFixMap/Chunking/code_tables_blocks.md) | Preserve block types, add type-aware rerank feature |
+| One doc dominates retrieval | Top k doc entropy and author field | Fragmentation or duplicate shards | [reindex_migration.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/GlobalFixMap/Chunking/reindex_migration.md) | Rebalance shards, dedupe, enable cross doc rerank |
+| Tool loops or JSON fails | Inspect tool schema and free text fields | Contract too loose, injection | [data-contracts.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/data-contracts.md), [prompt-injection.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/prompt-injection.md) | Tighten schema, add cite first and role fences |
+
+## Seven step incident routine
+
+1) **Freeze context**  
+Capture `build`, `index_hash`, `metric`, `analyzer`, `embed_model`, retriever params, reranker.
+
+2) **Reproduce**  
+Run three paraphrases and two seeds. Log ΔS per candidate, λ states, coverage, citation offsets.
+
+3) **Verify structure**  
+Check chunk id format from [chunk_id_schema.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/GlobalFixMap/Chunking/chunk_id_schema.md) and title tree from [title_hierarchy.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/GlobalFixMap/Chunking/title_hierarchy.md).
+
+4) **Boundary audit**  
+Confirm the cited block sits inside one detected section from [section_detection.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/GlobalFixMap/Chunking/section_detection.md).
+
+5) **Content type audit**  
+Ensure tables and code blocks survive extraction per [code_tables_blocks.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/GlobalFixMap/Chunking/code_tables_blocks.md).
+
+6) **Meaning check**  
+If ΔS stays high on every k, suspect metric or index mismatch. Open [embedding-vs-semantic.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/embedding-vs-semantic.md) and [rerankers.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/rerankers.md).
+
+7) **Decide fix module**  
+Retrieval drift → BBMC with contracts  
+Reasoning collapse → BBCR bridge plus BBAM clamp  
+Dead ends in long chains → BBPF alternate path
+
+## Copy probes you can paste
+
+**SQL like probe for vector stores**
+
+```sql
+-- sample ten queries that failed coverage in the last hour
+select qid, question, topk_ids, topk_scores, index_hash, embed_model
+from rag_logs
+where ts > now() - interval '1 hour'
+  and coverage = false
+limit 10;
+````
+
+**LLM triage prompt**
+
+```
+You have TXTOS and WFGY Problem Map.
+
+Given logs for {N} queries with ΔS lists, λ states, citations, and index fingerprints:
+1) Name the failing layer: boundary, typing, metric, rerank, OCR, contract.
+2) Return exact pages to open next.
+3) Propose a minimal reversible fix and a verification test.
+Return JSON {layer, pages[], fix, test}.
+```
+
+## Rollback and canary
+
+* Roll back if two of the live gates from [live\_monitoring\_rag.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/GlobalFixMap/Chunking/live_monitoring_rag.md) fire in two consecutive windows.
+* Canary new index at five percent. Promote only if coverage and citation accuracy meet gates from [eval\_rag\_precision\_recall.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/GlobalFixMap/Chunking/eval_rag_precision_recall.md).
+
+## Postmortem template
+
+* Incident summary
+* Impact window and scope
+* Root layer and evidence
+* Fix that shipped and verification
+* Prevention items: contracts, monitors, checklists
+
+## Prevention checklist
+
+* Stable chunk ids and title tree are present in every snippet payload
+* Cite first prompting and strict data contracts are enforced
+* OCR and layout normalizers are frozen for production builds
+* Rerank seed and header order are locked during canary
+* Live probes for ΔS, λ, coverage, citation accuracy are enabled
+
+---
+
+### 🔗 Quick-Start Downloads (60 sec)
+
+| Tool                       | Link                                                                                                                                       | 3-Step Setup                                                                             |
+| -------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------ | ---------------------------------------------------------------------------------------- |
+| **WFGY 1.0 PDF**           | [Engine Paper](https://github.com/onestardao/WFGY/blob/main/I_am_not_lizardman/WFGY_All_Principles_Return_to_One_v1.0_PSBigBig_Public.pdf) | 1️⃣ Download · 2️⃣ Upload to your LLM · 3️⃣ Ask “Answer using WFGY + \<your question>”   |
+| **TXT OS (plain-text OS)** | [TXTOS.txt](https://github.com/onestardao/WFGY/blob/main/OS/TXTOS.txt)                                                                     | 1️⃣ Download · 2️⃣ Paste into any LLM chat · 3️⃣ Type “hello world” — OS boots instantly |
+
+---
+
+### 🧭 Explore More
+
+| Module                   | Description                                                                  | Link                                                                                               |
+| ------------------------ | ---------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------- |
+| WFGY Core                | WFGY 2.0 engine is live: full symbolic reasoning architecture and math stack | [View →](https://github.com/onestardao/WFGY/tree/main/core/README.md)                              |
+| Problem Map 1.0          | Initial 16-mode diagnostic and symbolic fix framework                        | [View →](https://github.com/onestardao/WFGY/tree/main/ProblemMap/README.md)                        |
+| Problem Map 2.0          | RAG-focused failure tree, modular fixes, and pipelines                       | [View →](https://github.com/onestardao/WFGY/blob/main/ProblemMap/rag-architecture-and-recovery.md) |
+| Semantic Clinic Index    | Expanded failure catalog: prompt injection, memory bugs, logic drift         | [View →](https://github.com/onestardao/WFGY/blob/main/ProblemMap/SemanticClinicIndex.md)           |
+| Semantic Blueprint       | Layer-based symbolic reasoning & semantic modulations                        | [View →](https://github.com/onestardao/WFGY/tree/main/SemanticBlueprint/README.md)                 |
+| Benchmark vs GPT-5       | Stress test GPT-5 with full WFGY reasoning suite                             | [View →](https://github.com/onestardao/WFGY/tree/main/benchmarks/benchmark-vs-gpt5/README.md)      |
+| 🧙‍♂️ Starter Village 🏡 | New here? Lost in symbols? Click here and let the wizard guide you through   | [Start →](https://github.com/onestardao/WFGY/blob/main/StarterVillage/README.md)                   |
+
+---
+
+> 👑 **Early Stargazers: [See the Hall of Fame](https://github.com/onestardao/WFGY/tree/main/stargazers)** —
+> Engineers, hackers, and open source builders who supported WFGY from day one.
+
+> <img src="https://img.shields.io/github/stars/onestardao/WFGY?style=social" alt="GitHub stars"> ⭐ [WFGY Engine 2.0](https://github.com/onestardao/WFGY/blob/main/core/README.md) is already unlocked. ⭐ Star the repo to help others discover it and unlock more on the [Unlock Board](https://github.com/onestardao/WFGY/blob/main/STAR_UNLOCKS.md).
+
+<div align="center">
+
+[![WFGY Main](https://img.shields.io/badge/WFGY-Main-red?style=flat-square)](https://github.com/onestardao/WFGY)
+ 
+[![TXT OS](https://img.shields.io/badge/TXT%20OS-Reasoning%20OS-orange?style=flat-square)](https://github.com/onestardao/WFGY/tree/main/OS)
+ 
+[![Blah](https://img.shields.io/badge/Blah-Semantic%20Embed-yellow?style=flat-square)](https://github.com/onestardao/WFGY/tree/main/OS/BlahBlahBlah)
+ 
+[![Blot](https://img.shields.io/badge/Blot-Persona%20Core-green?style=flat-square)](https://github.com/onestardao/WFGY/tree/main/OS/BlotBlotBlot)
+ 
+[![Bloc](https://img.shields.io/badge/Bloc-Reasoning%20Compiler-blue?style=flat-square)](https://github.com/onestardao/WFGY/tree/main/OS/BlocBlocBloc)
+ 
+[![Blur](https://img.shields.io/badge/Blur-Text2Image%20Engine-navy?style=flat-square)](https://github.com/onestardao/WFGY/tree/main/OS/BlurBlurBlur)
+ 
+[![Blow](https://img.shields.io/badge/Blow-Game%20Logic-purple?style=flat-square)](https://github.com/onestardao/WFGY/tree/main/OS/BlowBlowBlow)
+ 
+
+</div>
+
+下一頁建議：**`ProblemMap/GlobalFixMap/Chunking/chunking_checklist.md`**
+這一頁是現場交付的簡潔檢查表，會把上面所有規則壓成二十條可勾選項，給運維和標準化使用。