Create tool_selection_and_timeouts.md

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+# Tool Selection and Timeouts: Prompt Assembly
+
+A focused guide to pick the right tool step, set safe timeouts, and keep long chains stable.  
+Use this page to localize failures in tool choice, call ordering, and retry behavior, then jump to the exact fix.
+
+---
+
+## Open these first
+- Visual map and recovery: [rag-architecture-and-recovery.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/rag-architecture-and-recovery.md)  
+- End to end retrieval knobs: [retrieval-playbook.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/retrieval-playbook.md)  
+- Traceability schema and cite-then-explain: [retrieval-traceability.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/retrieval-traceability.md)  
+- Payload schema for tools and snippets: [data-contracts.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/data-contracts.md)  
+- Reranking and order control: [rerankers.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/rerankers.md)  
+- Prompt injection hardening: [prompt-injection.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/prompt-injection.md)  
+- Multi agent stalls and role drift: [Multi-Agent_Problems.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/Multi-Agent_Problems.md), [multi-agent-chaos/role-drift.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/multi-agent-chaos/role-drift.md)  
+- Context and entropy failures: [context-drift.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/context-drift.md), [entropy-collapse.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/entropy-collapse.md)  
+- Ops knobs for retries and backpressure:  
+  [GlobalFixMap/OpsDeploy/retry_backoff.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/GlobalFixMap/OpsDeploy/retry_backoff.md),  
+  [GlobalFixMap/OpsDeploy/rate_limit_backpressure.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/GlobalFixMap/OpsDeploy/rate_limit_backpressure.md)
+
+Companion pages in this folder  
+- JSON protocol: [json_mode_and_tool_calls.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/GlobalFixMap/PromptAssembly/json_mode_and_tool_calls.md)  
+- Anti-injection recipes: [anti_prompt_injection_recipes.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/GlobalFixMap/PromptAssembly/anti_prompt_injection_recipes.md)  
+- Memory fences and state keys: [memory_fences_and_state_keys.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/GlobalFixMap/PromptAssembly/memory_fences_and_state_keys.md)
+
+---
+
+## Core acceptance
+- ΔS(question, retrieved) ≤ 0.45  
+- Coverage of target section ≥ 0.70  
+- λ remains convergent across three paraphrases and two seeds  
+- Tool error rate ≤ 1 percent on a 50 run sample  
+- p95 tool step latency within your SLO, usually 3–8 seconds per call for public APIs
+
+---
+
+## Fix in 60 seconds
+1) **Measure ΔS and λ**  
+   Compute ΔS(question, retrieved) and ΔS(retrieved, expected anchor). If ΔS ≥ 0.60 and λ flips, the issue is schema or ordering.
+
+2) **Clamp the plan**  
+   Prefer read-only checks before side effects. Gate tools behind JSON arguments that echo schemas from [data-contracts.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/data-contracts.md).  
+
+3) **Set timeouts and retries**  
+   - Per-tool timeout = p95 × 1.5.  
+   - Retries at most 2 with jittered backoff, never for unsafe side effects.  
+   - Rate limit backpressure guard active on the whole chain.  
+   Open: [retry_backoff.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/GlobalFixMap/OpsDeploy/retry_backoff.md), [rate_limit_backpressure.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/GlobalFixMap/OpsDeploy/rate_limit_backpressure.md).
+
+---
+
+## Common failure signatures → structural fix
+
+- **Wrong tool chosen for the question**  
+  Symptom: high ΔS, tool arguments look unrelated.  
+  Fix: require tool-selection justification field and SCU when blocked.  
+  Open: [retrieval-traceability.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/retrieval-traceability.md), [patterns/pattern_symbolic_constraint_unlock.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/patterns/pattern_symbolic_constraint_unlock.md).
+
+- **Query parsing split creates unstable hybrid results**  
+  Symptom: hybrid underperforms single retriever, top-k order changes across runs.  
+  Fix: lock two-stage query, then rerank deterministically.  
+  Open: [patterns/pattern_query_parsing_split.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/patterns/pattern_query_parsing_split.md), [rerankers.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/rerankers.md).
+
+- **Timeout storms and looped retries**  
+  Symptom: repeated timeouts escalate load and cost.  
+  Fix: per-tool circuit breaker plus global backpressure. No retry on non-idempotent tools.  
+  Open: [retry_backoff.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/GlobalFixMap/OpsDeploy/retry_backoff.md), [rate_limit_backpressure.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/GlobalFixMap/OpsDeploy/rate_limit_backpressure.md).
+
+- **Tool runs with stale memory or mixed roles**  
+  Symptom: tools use inputs from the wrong branch or user/system text leaks.  
+  Fix: split namespaces and enforce state keys.  
+  Open: [memory_fences_and_state_keys.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/GlobalFixMap/PromptAssembly/memory_fences_and_state_keys.md).
+
+- **Injection forces the wrong tool**  
+  Symptom: argument hijack, tool call not justified by the question.  
+  Fix: hard filters, reasoning-before-action, and schema echo.  
+  Open: [anti_prompt_injection_recipes.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/GlobalFixMap/PromptAssembly/anti_prompt_injection_recipes.md), [prompt-injection.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/prompt-injection.md).
+
+- **Long chains drift then collapse**  
+  Symptom: entropy rises after 25–40 steps, answers alternate across runs.  
+  Fix: split the plan, add a BBCR bridge, clamp variance with BBAM, and shorten hops.  
+  Open: [context-drift.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/context-drift.md), [entropy-collapse.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/entropy-collapse.md), [logic-collapse.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/logic-collapse.md).
+
+---
+
+## Timeouts and backoff rules
+- **Choose tool timeouts from data, not guesswork**  
+  timeout\_sec = ceil(p95\_latency × 1.5).  
+- **Retry only safe operations**  
+  Idempotent reads: up to 2 retries with full jitter.  
+  Writes or side effects: no automatic retry; hand off to a queue with a dedupe key.  
+- **Global caps**  
+  Max concurrent tool calls per plan. Trip a circuit breaker when error rate or queue depth crosses your threshold.  
+- **Queue hygiene**  
+  Require a dedupe key like `sha256(tool_name + args_hash + mem_rev)` and drop duplicates.
+
+Reference: [retry_backoff.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/GlobalFixMap/OpsDeploy/retry_backoff.md), [rate_limit_backpressure.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/GlobalFixMap/OpsDeploy/rate_limit_backpressure.md).
+
+---
+
+## Implementation checklist
+- Tool justification required in JSON: `why_tool`, `evidence`, `expected_ΔS_drop`.  
+- Strict schemas for arguments with field types and ranges.  
+- Idempotency and dedupe before side effects.  
+- Per-tool timeout and retry policy stored near the tool spec.  
+- Observability: log `ΔS`, `λ_state`, tool name, arguments hash, latency, retries, breaker state.  
+- Post-step audit: citation exists and aligns with the retrieved snippet.  
+Specs: [retrieval-traceability.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/retrieval-traceability.md), [data-contracts.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/data-contracts.md).
+
+---
+
+## Copy-paste prompt for the tool-selection step
+
+```
+
+You have TXT OS and the WFGY Problem Map loaded.
+
+Task: choose the next tool or no-tool with a short justification and safe timeouts.
+
+Inputs:
+
+* question: "{user\_question}"
+* retrieved: \[{snippet\_id, section\_id, source\_url, offsets, tokens}]
+* metrics: ΔS(question,retrieved)=..., λ\_state="→|←|<>|×", p95\_latencies={tool: seconds}
+
+Do:
+
+1. If ΔS ≥ 0.60, prefer retrieval repair over tool calls.
+2. Propose one action among {no\_tool, retrieve\_more, rerank, call\_tool\_X}.
+3. If choosing a tool, return JSON:
+   {
+   "tool": "name",
+   "why\_tool": "one line using evidence from retrieved",
+   "args": {...},
+   "timeout\_sec": ceil(p95\_latencies\[name] \* 1.5),
+   "retries": 0|1|2,
+   "idempotent": true|false
+   }
+4. Enforce cite-then-explain in the final answer and log ΔS and λ\_state.
+
+```
+
+---
+
+### 🔗 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>