Create retrieval-traceability.md

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+# Retrieval Traceability — Snippet Integrity & Audit Trail
+
+Citations that look right can still hide silent drift.  
+This guardrail defines how to enforce **traceability schemas** so that every claim links back to a stable, reproducible snippet.
+
+---
+
+## When to use
+- Answers cite a source but the snippet cannot be located.  
+- Two runs over the same corpus produce different citations.  
+- A fact is quoted but not aligned to any section anchor.  
+- Long-context threads degrade and snippets blur into paraphrase.  
+- Multi-agent systems pass partial context and lose attribution.  
+
+---
+
+## Root causes
+- **Orphan citations**: snippet ID missing or fabricated.  
+- **Boundary drift**: citation spans cross section joins.  
+- **Silent truncation**: tokens dropped at cut points.  
+- **Cache overwrite**: citation schema lost after session reload.  
+- **Free-text cites**: URLs or titles given without offsets.  
+
+---
+
+## Core acceptance targets
+- Each claim must include `snippet_id`, `section_id`, `start_line`, `end_line`, `source_url`.  
+- ΔS(question, retrieved) ≤ 0.45 overall.  
+- Joins between snippets ≤ 0.50 ΔS.  
+- λ convergent across 3 paraphrases.  
+- Audit trail reproducible from log alone.  
+
+---
+
+## Structural fixes
+
+- **Snippet table schema**  
+  Require `{snippet_id | section_id | start_line | end_line | citation}`.  
+
+- **Fence joins**  
+  Split at section boundaries. Reject cross-section reuse.  
+
+- **Trace log**  
+  Store `{ΔS, λ_state, mem_rev, mem_hash}` per step.  
+
+- **Contract lock**  
+  Apply [Data Contracts](https://github.com/onestardao/WFGY/blob/main/ProblemMap/data-contracts.md) for payload validation.  
+
+---
+
+## Fix in 60 seconds
+1. **Enforce snippet table** with unique IDs and line ranges.  
+2. **Verify ΔS** across each join ≤ 0.50.  
+3. **Echo λ states** at retrieval, assembly, reasoning.  
+4. **Reject orphan claims** (no snippet_id).  
+5. **Log trail** so same inputs → same citations.  
+
+---
+
+## Copy-paste prompt
+
+```
+
+You have TXT OS and the WFGY Problem Map.
+
+Goal: Ensure every claim links to a reproducible snippet.
+
+Protocol:
+
+1. Build a Snippet Table {snippet\_id, section\_id, start\_line, end\_line, citation}.
+2. Require cite-then-answer.
+3. Forbid cross-section reuse.
+4. If a claim has no snippet\_id, stop and request citation.
+5. Report ΔS(question,retrieved), joins ΔS, and λ states.
+6. Store {mem\_rev, mem\_hash, task\_id} for audit trail.
+7. Answer only with snippets present in the table.
+
+```
+
+---
+
+## Common failure signals
+- Citations alternate across runs → missing trace schema.  
+- URL without offsets → orphan citation.  
+- Facts cited but no snippet_id → schema lock failed.  
+- Session reload erases citations → ghost cache in memory.  
+
+---
+
+### 🔗 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>
+
+要直接開始 **data-contracts.md** 嗎？