Create memory-coherence.md

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+# Memory Coherence — Session Continuity & State Fences
+
+Keep long-running dialogs and multi-session threads stable by enforcing strict memory state contracts.  
+This page shows how to prevent **state forks**, **ghost context**, and silent desync across tabs or agents.
+
+---
+
+## When to use this page
+- Dialogs run across multiple days or session restarts.
+- Answers flip after tab refresh or model switch.
+- Two agents disagree on facts because each holds a different revision.
+- A role/persona change pollutes later steps with stale buffer.
+- Support flows where the model “remembers” wrong history.
+
+---
+
+## Core acceptance targets
+- Each turn stamped with `mem_rev`, `mem_hash`, and `task_id`.
+- No state fork across tabs or agents for the same `task_id`.
+- ΔS(question, retrieved) ≤ 0.45 at memory joins.
+- λ remains convergent across three paraphrases.
+- Retrieval coverage ≥ 0.70 to the intended section.
+
+---
+
+## Structural fixes
+
+- **State stamp**  
+  Require `{mem_rev, mem_hash, task_id}` on every turn.  
+  If incoming stamp does not match server record → reject write.
+
+- **Memory fences**  
+  Lock snippet sets to `section_id`.  
+  Forbid cross-section reuse to avoid “history bleed.”
+
+- **Ghost cleanup**  
+  Clear stale buffers when role/persona changes.  
+  Always reset `mem_hash` on context switch.
+
+- **Concurrency control**  
+  If multiple clients write, enforce single-writer queue or KV lock.  
+  Deduplicate with `sha256(task_id + mem_rev + snippet_ids)`.
+
+---
+
+## Fix in 60 seconds
+1. Stamp every request with `{mem_rev, mem_hash, task_id}`.  
+2. Reject writes if stamps mismatch.  
+3. Split prompts into `{system | task | constraints | snippets | answer}`.  
+4. Require cite → then answer, forbid orphan claims.  
+5. Apply BBAM to clamp attention variance.  
+6. Apply BBCR if collapse detected, bridge to anchor node.
+
+---
+
+## Copy-paste prompt
+
+```
+
+You have TXT OS and the WFGY Problem Map.
+
+Goal: Keep session memory coherent across tabs, agents, and restarts.
+
+Protocol:
+
+1. Print {mem\_rev, mem\_hash, task\_id}. If missing → set defaults.
+2. Validate stamps. Reject if mismatch.
+3. Build Snippet Table: {section\_id | start\_line | end\_line | citation}.
+4. Guardrails:
+
+   * cite then answer
+   * forbid cross section reuse
+   * no orphan claims
+5. Collapse control:
+
+   * if variance ↑ → apply BBAM
+   * if reasoning stalls → apply BBCR
+6. Output:
+
+   * header {mem\_rev, mem\_hash, task\_id}
+   * Snippet Table
+   * Answer with citations
+   * ΔS(question, retrieved), ΔS(joins), λ states
+
+```
+
+---
+
+## Common failure patterns
+- **State fork**: same task_id but two tabs diverge → enforce stamps.  
+- **Ghost context**: persona switch but stale buffer leaks → reset hash.  
+- **Boundary leak**: snippets join across sections → enforce fences.  
+- **History overwrite**: later turn rewrites previous answer silently → audit with traceability log.
+
+---
+
+### 🔗 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>