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+# OpenRouter: Guardrails and Fix Patterns
+
+A practical checklist to keep responses stable while routing through OpenRouter. Use this page when behavior flips across models, routes, or sessions.
+
+**Acceptance targets**
+- ΔS(question, context) ≤ 0.45
+- λ stays convergent across 3 paraphrases
+- Coverage ≥ 0.70 for citation style QA
+- Snippet ↔ citation table present
+
+**Quick links**
+- Visual map and recovery: [RAG Architecture & Recovery](https://github.com/onestardao/WFGY/blob/main/ProblemMap/rag-architecture-and-recovery.md)
+- End to end knobs: [Retrieval Playbook](https://github.com/onestardao/WFGY/blob/main/ProblemMap/retrieval-playbook.md)
+- Why this snippet: [Retrieval Traceability](https://github.com/onestardao/WFGY/blob/main/ProblemMap/retrieval-traceability.md)
+- Logic repair: [Logic Collapse & Recovery](https://github.com/onestardao/WFGY/blob/main/ProblemMap/logic-collapse.md)
+- Long chain drift: [Context Drift](https://github.com/onestardao/WFGY/blob/main/ProblemMap/context-drift.md)
+- Entropy melt: [Entropy Collapse](https://github.com/onestardao/WFGY/blob/main/ProblemMap/entropy-collapse.md)
+- Data schemas: [Data Contracts](https://github.com/onestardao/WFGY/blob/main/ProblemMap/data-contracts.md)
+- Embedding vs meaning: [Embedding ≠ Semantic](https://github.com/onestardao/WFGY/blob/main/ProblemMap/embedding-vs-semantic.md)
+- Multilingual: [Multilingual Guide](https://github.com/onestardao/WFGY/blob/main/ProblemMap/multilingual-guide.md)
+- Ops and live triage: [Debug Playbook](https://github.com/onestardao/WFGY/blob/main/ProblemMap/ops/debug_playbook.md) · [Live Monitoring](https://github.com/onestardao/WFGY/blob/main/ProblemMap/ops/live_monitoring_rag.md)
+
+---
+
+## 1) Minimal setup checklist
+
+Pin these before debugging model logic.
+
+- Route selection  
+  Use explicit model ids. Disable any auto fallback if you need reproducibility. Log the final route id that served the request. See [Retrieval Traceability](https://github.com/onestardao/WFGY/blob/main/ProblemMap/retrieval-traceability.md).
+- System prompt handling  
+  Ensure the system message is always sent in the payload. Do not rely on UI side memory. If sessions change tabs, stamp a `mem_rev` and reload the system block. See [patterns: memory desync](https://github.com/onestardao/WFGY/blob/main/ProblemMap/patterns/pattern_memory_desync.md).
+- Token limits and truncation  
+  Verify max tokens per route. Truncation that drops headers will spike ΔS. Reorder context with a citation first schema. See [Data Contracts](https://github.com/onestardao/WFGY/blob/main/ProblemMap/data-contracts.md).
+- JSON and tool calling  
+  Fix the exact function schema. Return to plain text if tool calls vary across sub models. If JSON strictness wobbles, clamp with a cite then answer envelope. See [Logic Collapse & Recovery](https://github.com/onestardao/WFGY/blob/main/ProblemMap/logic-collapse.md).
+- Temperature and top_p  
+  Keep one of them fixed. If variance climbs during long dialogs, apply BBAM and reduce randomness. See [Entropy Collapse](https://github.com/onestardao/WFGY/blob/main/ProblemMap/entropy-collapse.md).
+- Streaming flags and timeouts  
+  Disable streaming during audits to capture full text. Set sane timeouts and retries at the client.
+
+---
+
+## 2) Quick triage with WFGY instruments
+
+Run this order. Stop as soon as you localize the fault.
+
+1) **ΔS(question, retrieved_context)**  
+   - ΔS ≥ 0.60 → perception issue. Check chunking and route level truncation.  
+   - Open [Retrieval Playbook](https://github.com/onestardao/WFGY/blob/main/ProblemMap/retrieval-playbook.md) and [Hallucination](https://github.com/onestardao/WFGY/blob/main/ProblemMap/hallucination.md).
+
+2) **λ_observe layer tags**  
+   - retrieval convergent, reasoning divergent → interpretation collapse.  
+   - Open [Logic Collapse & Recovery](https://github.com/onestardao/WFGY/blob/main/ProblemMap/logic-collapse.md).
+
+3) **E_resonance vs length**  
+   - E rises with length while ΔS stays high → entropy melt, clamp variance.  
+   - Open [Entropy Collapse](https://github.com/onestardao/WFGY/blob/main/ProblemMap/entropy-collapse.md).
+
+---
+
+## 3) Common failure patterns on OpenRouter and fixes
+
+### A) Silent route change or fallback
+**Signs**
+- Same prompt flips tone or format between calls.
+- Logs show a different backing model id.
+
+**Fix**
+- Pin a single route id. Record the final served model in traces.  
+- Recheck ΔS. If still high, audit prompt headers and truncation.  
+- Read [Retrieval Traceability](https://github.com/onestardao/WFGY/blob/main/ProblemMap/retrieval-traceability.md) and [Debug Playbook](https://github.com/onestardao/WFGY/blob/main/ProblemMap/ops/debug_playbook.md).
+
+### B) System prompt dropped after tab or session swap
+**Signs**
+- First answer follows policy, later turns forget constraints.
+- λ flips divergent only after a refresh.
+
+**Fix**
+- Stamp `mem_rev` and `mem_hash` per turn. Reload system block when mismatch.  
+- See [patterns: memory desync](https://github.com/onestardao/WFGY/blob/main/ProblemMap/patterns/pattern_memory_desync.md) and [Data Contracts](https://github.com/onestardao/WFGY/blob/main/ProblemMap/data-contracts.md).
+
+### C) JSON or tool schema oscillation
+**Signs**
+- Tool outputs valid once, then free text next call.
+- Fields appear or vanish across routes.
+
+**Fix**
+- Wrap with citation first schema, then answer.  
+- Apply BBCR bridge step when λ turns divergent at reasoning.  
+- Open [Logic Collapse & Recovery](https://github.com/onestardao/WFGY/blob/main/ProblemMap/logic-collapse.md) and [Data Contracts](https://github.com/onestardao/WFGY/blob/main/ProblemMap/data-contracts.md).
+
+### D) Long chain degradation
+**Signs**
+- Capitalization drifts, references smear, later turns contradict earlier ones.
+
+**Fix**
+- Apply semantic chunking on inputs.  
+- Stabilize with BBAM, then re anchor with section headers.  
+- Read [Context Drift](https://github.com/onestardao/WFGY/blob/main/ProblemMap/context-drift.md) and [Entropy Collapse](https://github.com/onestardao/WFGY/blob/main/ProblemMap/entropy-collapse.md).
+
+### E) Multilingual or tokenizer mismatch
+**Signs**
+- High vector similarity yet wrong meaning on non English.  
+- ΔS flat high across k.
+
+**Fix**
+- Switch to multilingual embeddings or normalize analyzer.  
+- See [Embedding ≠ Semantic](https://github.com/onestardao/WFGY/blob/main/ProblemMap/embedding-vs-semantic.md) and [Multilingual Guide](https://github.com/onestardao/WFGY/blob/main/ProblemMap/multilingual-guide.md).
+
+---
+
+## 4) Verification and regression gates
+
+Use this short gate before merging changes.
+
+- Retrieval sanity  
+  Coverage ≥ 0.70 on target section. ΔS(question, context) ≤ 0.45.
+- Reasoning stability  
+  λ remains convergent across three paraphrases. No schema leak.
+- Traceability  
+  Produce snippet ↔ citation table per answer. See [Retrieval Traceability](https://github.com/onestardao/WFGY/blob/main/ProblemMap/retrieval-traceability.md).
+- Long dialog check  
+  E_resonance stays flat at window joins. See [Entropy Collapse](https://github.com/onestardao/WFGY/blob/main/ProblemMap/entropy-collapse.md).
+
+---
+
+## 5) Escalation criteria
+
+Change structure when any holds.
+
+- ΔS remains ≥ 0.60 after prompt and retrieval fixes  
+  Rebuild index or adjust analyzer. See [Retrieval Playbook](https://github.com/onestardao/WFGY/blob/main/ProblemMap/retrieval-playbook.md).
+- λ flips divergent as soon as two sources are mixed  
+  Enforce source fences and SCU. See [Data Contracts](https://github.com/onestardao/WFGY/blob/main/ProblemMap/data-contracts.md).
+- JSON mode cannot hold across routes  
+  Disable tool calls for that path. Return to plain text with citation first. See [Logic Collapse & Recovery](https://github.com/onestardao/WFGY/blob/main/ProblemMap/logic-collapse.md).
+
+
+### 🔗 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>