# AWS CodeWhisperer: Guardrails and Fix Patterns
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> - [**DevTools_CodeAI** — AI-assisted coding and developer productivity](./README.md)
> - [**WFGY Global Fix Map** — main Emergency Room, 300+ structured fixes](../README.md)
> - [**WFGY Problem Map 1.0** — 16 reproducible failure modes](../../README.md)
>
> Think of this page as a desk within a ward.
> If you need the full triage and all prescriptions, return to the Emergency Room lobby.
Use this guide when completions or chat inside CodeWhisperer feel flaky, tool steps loop, or RAG-style answers cite the wrong things. The fixes below map to WFGY pages with measurable targets so you can verify quickly and avoid infra changes.
## Open these first
* Visual map and recovery: [RAG Architecture & Recovery](https://github.com/onestardao/WFGY/blob/main/ProblemMap/rag-architecture-and-recovery.md)
* End-to-end retrieval knobs: [Retrieval Playbook](https://github.com/onestardao/WFGY/blob/main/ProblemMap/retrieval-playbook.md)
* Why this snippet, not another: [Retrieval Traceability](https://github.com/onestardao/WFGY/blob/main/ProblemMap/retrieval-traceability.md)
* Ordering control for top-k: [Rerankers](https://github.com/onestardao/WFGY/blob/main/ProblemMap/rerankers.md)
* Embedding vs meaning drift: [Embedding ≠ Semantic](https://github.com/onestardao/WFGY/blob/main/ProblemMap/embedding-vs-semantic.md)
* Long dialogs and chain fatigue: [Context Drift](https://github.com/onestardao/WFGY/blob/main/ProblemMap/context-drift.md), [Entropy Collapse](https://github.com/onestardao/WFGY/blob/main/ProblemMap/entropy-collapse.md)
* Prompt injection and schema locks: [Prompt Injection](https://github.com/onestardao/WFGY/blob/main/ProblemMap/prompt-injection.md)
* Multi-agent conflicts and handoffs: [Multi-Agent Problems](https://github.com/onestardao/WFGY/blob/main/ProblemMap/Multi-Agent_Problems.md)
* Cold boot and deploy ordering: [Bootstrap Ordering](https://github.com/onestardao/WFGY/blob/main/ProblemMap/bootstrap-ordering.md), [Deployment Deadlock](https://github.com/onestardao/WFGY/blob/main/ProblemMap/deployment-deadlock.md), [Pre-Deploy Collapse](https://github.com/onestardao/WFGY/blob/main/ProblemMap/predeploy-collapse.md)
* Snippet and citation schema: [Data Contracts](https://github.com/onestardao/WFGY/blob/main/ProblemMap/data-contracts.md)
## Core acceptance
* ΔS(question, retrieved) ≤ 0.45
* Coverage ≥ 0.70 to the correct section
* λ remains convergent across three paraphrases and two seeds
* E\_resonance flat across the dialog window
---
## Typical CodeWhisperer breakpoints → exact fix
* **Region or account skew** between your IDE plugin, credentials, and model endpoint.
Verify region and identity consistently. If first call in a fresh boot fails, fix ordering.
Open: [Bootstrap Ordering](https://github.com/onestardao/WFGY/blob/main/ProblemMap/bootstrap-ordering.md), [Pre-Deploy Collapse](https://github.com/onestardao/WFGY/blob/main/ProblemMap/predeploy-collapse.md)
* **IDE chat cites the wrong file or wrong snippet** after retrieval.
Lock the snippet contract and require cite-then-explain.
Open: [Retrieval Traceability](https://github.com/onestardao/WFGY/blob/main/ProblemMap/retrieval-traceability.md), [Data Contracts](https://github.com/onestardao/WFGY/blob/main/ProblemMap/data-contracts.md)
* **High similarity yet wrong answer** when CodeWhisperer consults docs.
Suspect metric or index mismatch, or fragmented store.
Open: [Embedding ≠ Semantic](https://github.com/onestardao/WFGY/blob/main/ProblemMap/embedding-vs-semantic.md), [Vectorstore Fragmentation](https://github.com/onestardao/WFGY/blob/main/ProblemMap/patterns/pattern_vectorstore_fragmentation.md)
* **Hybrid retrieval gets worse** than single retriever in chat plans.
Stabilize query split and lock reranking deterministically.
Open: [Query Parsing Split](https://github.com/onestardao/WFGY/blob/main/ProblemMap/patterns/pattern_query_parsing_split.md), [Rerankers](https://github.com/onestardao/WFGY/blob/main/ProblemMap/rerankers.md)
* **Tool loop or agent handoff stalls** when chat triggers build, test, or docs tools.
Split memory namespaces, apply timeouts, and fence writes by `mem_rev` and `mem_hash`.
Open: [Multi-Agent Problems](https://github.com/onestardao/WFGY/blob/main/ProblemMap/Multi-Agent_Problems.md)
* **Security or policy blocks** cause silent fallbacks that change outputs.
Make refusal paths explicit and keep the schema locked to avoid hidden branches.
Open: [Prompt Injection](https://github.com/onestardao/WFGY/blob/main/ProblemMap/prompt-injection.md)
---
## Fix in 60 seconds
1. **Measure ΔS**
Compute ΔS(question, retrieved) and ΔS(retrieved, anchor section).
Stable < 0.40, transitional 0.40–0.60, risk ≥ 0.60.
2. **Probe λ\_observe**
Re-order headers minimally and vary k as 5, 10, 20.
If ΔS stays flat and high, rebuild metric and normalize.
If λ flips on harmless paraphrase, clamp with BBAM.
3. **Apply the module**
Retrieval drift → BBMC + [Data Contracts](https://github.com/onestardao/WFGY/blob/main/ProblemMap/data-contracts.md)
Reasoning collapse → BBCR bridge + BBAM, then verify with [Logic Collapse](https://github.com/onestardao/WFGY/blob/main/ProblemMap/logic-collapse.md)
Dead ends in long chains → BBPF alternate paths
4. **Verify**
Coverage ≥ 0.70 on three paraphrases.
λ convergent on two seeds.
E\_resonance flat over ten-step dialogs.
---
## IDE checklist for stable runs
* **Warm-up fence** before chat or retrieval. Confirm `INDEX_HASH`, `VECTOR_READY`, and current credentials.
See: [Bootstrap Ordering](https://github.com/onestardao/WFGY/blob/main/ProblemMap/bootstrap-ordering.md)
* **Idempotency** for any write step triggered by chat tools.
Compute `dedupe_key = sha256(source_id + revision + index_hash)` and drop duplicates.
* **Cite-then-explain** as a hard rule in the prompt template.
Forbid cross-section reuse unless explicitly allowed by contract.
* **Observability probes** inside the IDE task.
Log ΔS and λ states for retrieve, assemble, reason.
Alert when ΔS ≥ 0.60 or λ turns divergent.
* **Regression gate** before you trust the session.
See: [RAG Precision/Recall](https://github.com/onestardao/WFGY/blob/main/ProblemMap/eval/eval_rag_precision_recall.md)
---
## Copy-paste prompt for CodeWhisperer Chat
```
You have TXTOS and the WFGY Problem Map loaded.
My task:
- symptom: [one line]
- traces: ΔS(question,retrieved)=..., ΔS(retrieved,anchor)=..., λ states across 3 paraphrases
Do:
1) identify which layer fails and why,
2) point me to the exact WFGY page,
3) give minimal steps to push ΔS ≤ 0.45 and keep λ convergent,
4) return a short JSON plan with {citations, steps, ΔS, λ_state, next_fix}.
Use BBMC, BBPF, BBCR, BBAM when relevant. Enforce cite-then-explain.
```
---
## When to escalate
* ΔS stays ≥ 0.60 after chunking and metric fixes
Rebuild with the semantic chunking checklist and verify on a small gold set.
Open: [Chunking Checklist](https://github.com/onestardao/WFGY/blob/main/ProblemMap/chunking-checklist.md)
* Answers flip between identical runs in the same IDE session
Investigate memory and version skew.
Open: [Pre-Deploy Collapse](https://github.com/onestardao/WFGY/blob/main/ProblemMap/predeploy-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 + \” |
| **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)** — 
⭐ [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).
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