Create ocr-parsing-checklist.md

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+# OCR Parsing Checklist — Input Integrity
+
+OCR and parsing errors are one of the most common silent killers of retrieval pipelines.  
+Text looks fine to the eye, but models drift because tokens, spacing, or casing have changed.  
+This checklist ensures **integrity at the source layer** before embeddings or retrieval begin.
+
+---
+
+## When to use
+- OCR text matches the visual PDF but citations miss the right section.  
+- Code blocks or math collapse after parsing.  
+- Mixed language documents behave inconsistently.  
+- Special characters or hyphen splits break tokens.  
+- Headers or section anchors disappear during export.  
+
+---
+
+## Core acceptance targets
+- Retrieval coverage ≥ **0.70** of intended section.  
+- ΔS(question, retrieved) ≤ **0.45**.  
+- λ remains convergent across three paraphrases.  
+- No orphan tokens or invisible characters.  
+
+---
+
+## Checklist for OCR + Parsing stability
+
+- **Normalization**  
+  - Apply Unicode NFC.  
+  - Collapse whitespace.  
+  - Strip zero-width characters.  
+  - Unify full/half-width variants.  
+
+- **Confidence gating**  
+  - Drop OCR lines below confidence threshold (e.g., <0.90).  
+  - Mark uncertain spans for human review.  
+
+- **Structure retention**  
+  - Preserve headers, anchors, and section boundaries.  
+  - Maintain paragraph breaks and table grids.  
+  - For math/LaTeX, keep explicit delimiters.  
+
+- **Traceable fields**  
+  - Every chunk must have `{section_id, start_line, end_line, source_url}`.  
+  - Store `ocr_confidence` with each snippet.  
+
+- **Schema validation**  
+  - Run post-export audit:  
+    - Ensure every snippet cites a valid chunk_id.  
+    - Detect empty or duplicated snippets.  
+
+---
+
+## Fix in 60 seconds
+1. Normalize the text (Unicode NFC, strip zero-width, unify casing).  
+2. Drop low-confidence OCR lines and flag uncertain spans.  
+3. Re-parse with structural retention enabled.  
+4. Add metadata `{chunk_id, section_id, offsets, ocr_confidence}`.  
+5. Re-run ΔS probe; confirm joins ≤ 0.50 and overall ΔS ≤ 0.45.  
+
+---
+
+## Copy-paste prompt
+
+```
+
+You have TXT OS and the WFGY Problem Map.
+
+Task: validate OCR and parsing output.
+
+Protocol:
+
+1. Normalize all inputs (Unicode NFC, full/half width, zero-width removal).
+2. Reject snippets with ocr\_confidence < 0.90.
+3. Require schema {chunk\_id, section\_id, start\_line, end\_line, source\_url}.
+4. Forbid orphan citations.
+5. Probe ΔS(question, retrieved). Require ≤ 0.45.
+6. Report λ states and trace each snippet.
+
+```
+
+---
+
+## Common failure signals
+- Correct visual text but retrieval misses section → invisible marks or spacing drift.  
+- Math collapses into plain text → parsing dropped delimiters.  
+- Long answers cite nothing → headers lost in export.  
+- Flip-flop answers across sessions → orphan tokens or unstable chunking.  
+
+---
+
+### 🔗 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)
+&nbsp;
+[![TXT OS](https://img.shields.io/badge/TXT%20OS-Reasoning%20OS-orange?style=flat-square)](https://github.com/onestardao/WFGY/tree/main/OS)
+&nbsp;
+[![Blah](https://img.shields.io/badge/Blah-Semantic%20Embed-yellow?style=flat-square)](https://github.com/onestardao/WFGY/tree/main/OS/BlahBlahBlah)
+&nbsp;
+[![Blot](https://img.shields.io/badge/Blot-Persona%20Core-green?style=flat-square)](https://github.com/onestardao/WFGY/tree/main/OS/BlotBlotBlot)
+&nbsp;
+[![Bloc](https://img.shields.io/badge/Bloc-Reasoning%20Compiler-blue?style=flat-square)](https://github.com/onestardao/WFGY/tree/main/OS/BlocBlocBloc)
+&nbsp;
+[![Blur](https://img.shields.io/badge/Blur-Text2Image%20Engine-navy?style=flat-square)](https://github.com/onestardao/WFGY/tree/main/OS/BlurBlurBlur)
+&nbsp;
+[![Blow](https://img.shields.io/badge/Blow-Game%20Logic-purple?style=flat-square)](https://github.com/onestardao/WFGY/tree/main/OS/BlowBlowBlow)
+&nbsp;
+</div>