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170 lines
8.1 KiB
Markdown
170 lines
8.1 KiB
Markdown
# LangChain Guardrails and Patterns
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<details>
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<summary><strong>🧭 Quick Return to Map</strong></summary>
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<br>
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> You are in a sub-page of **Automation Platforms**.
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> To reorient, go back here:
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>
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> - [**Automation Platforms** — stabilize no-code workflows and integrations](./README.md)
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> - [**WFGY Global Fix Map** — main Emergency Room, 300+ structured fixes](../README.md)
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> - [**WFGY Problem Map 1.0** — 16 reproducible failure modes](../../README.md)
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>
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> Think of this page as a desk within a ward.
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> If you need the full triage and all prescriptions, return to the Emergency Room lobby.
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</details>
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Use this page when your RAG or agent workflow runs in **LangChain**. It maps common orchestration failures to the exact structural fixes in the Problem Map and gives a minimal recipe you can embed in a chain or agent.
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**Core acceptance**
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* ΔS(question, retrieved) ≤ 0.45
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* coverage ≥ 0.70 for the target section
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* λ stays convergent across 3 paraphrases
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---
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## Typical breakpoints and the right fix
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* **Chains run before retriever or vectorstore is ready**
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Fix No.14: **Bootstrap Ordering** → [Open](https://github.com/onestardao/WFGY/blob/main/ProblemMap/bootstrap-ordering.md)
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* **First query after deploy crashes due to env/secret mismatch**
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Fix No.16: **Pre-Deploy Collapse** → [Open](https://github.com/onestardao/WFGY/blob/main/ProblemMap/predeploy-collapse.md)
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* **Event loop deadlocks when retriever and synthesis wait on each other**
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Fix No.15: **Deployment Deadlock** → [Open](https://github.com/onestardao/WFGY/blob/main/ProblemMap/deployment-deadlock.md)
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* **Embedding distance looks fine but semantics drift**
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Fix No.5: **Embedding ≠ Semantic** → [Open](https://github.com/onestardao/WFGY/blob/main/ProblemMap/embedding-vs-semantic.md)
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* **Output citations don’t map to snippets**
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Fix No.8: **Retrieval Traceability** → [Open](https://github.com/onestardao/WFGY/blob/main/ProblemMap/retrieval-traceability.md)
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Contract payloads with: **Data Contracts** → [Open](https://github.com/onestardao/WFGY/blob/main/ProblemMap/data-contracts.md)
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* **Hybrid retrieval chains underperform**
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Pattern: **Query Parsing Split** → [Open](https://github.com/onestardao/WFGY/blob/main/ProblemMap/query_parsing_split.md)
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Review: **Rerankers** → [Open](https://github.com/onestardao/WFGY/blob/main/ProblemMap/rerankers.md)
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* **Facts indexed but never surfaced**
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Pattern: **Vectorstore Fragmentation** → [Open](https://github.com/onestardao/WFGY/blob/main/ProblemMap/vectorstore-fragmentation.md)
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* **Two knowledge sources get blended in a single answer**
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Pattern: **Symbolic Constraint Unlock (SCU)** → [Open](https://github.com/onestardao/WFGY/blob/main/ProblemMap/patterns/pattern_symbolic_constraint_unlock.md)
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---
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## Minimal setup checklist for LangChain flows
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1. **Warm-up fence**
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Check vectorstore readiness and index hash. If mismatch, retry or short-circuit.
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Spec: [Bootstrap Ordering](https://github.com/onestardao/WFGY/blob/main/ProblemMap/bootstrap-ordering.md)
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2. **Idempotency key**
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Before persisting outputs, compute a dedupe key from `(doc_id + rev + index_hash)`.
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3. **Contracted retriever outputs**
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Must emit: `snippet_id, section_id, source_url, offsets, tokens`.
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Enforce cite-then-explain.
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Specs: [Data Contracts](https://github.com/onestardao/WFGY/blob/main/ProblemMap/data-contracts.md) · [Retrieval Traceability](https://github.com/onestardao/WFGY/blob/main/ProblemMap/retrieval-traceability.md)
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4. **Observability probes**
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Log ΔS for retrieval steps and λ state transitions.
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Overview: [RAG Architecture & Recovery](https://github.com/onestardao/WFGY/blob/main/ProblemMap/rag-architecture-and-recovery.md)
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5. **Concurrency guard**
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Use a single writer pattern for retriever updates.
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See: [Deployment Deadlock](https://github.com/onestardao/WFGY/blob/main/ProblemMap/deployment-deadlock.md)
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6. **Eval before publish**
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Run precision/recall probes.
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Eval: [RAG Precision/Recall](https://github.com/onestardao/WFGY/blob/main/ProblemMap/eval/eval_rag_precision_recall.md)
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---
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## Copy-paste prompt for LangChain LLMChain
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```
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You have access to TXT OS and WFGY Problem Map files.
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This retriever produced {k} docs with fields {snippet_id, section_id, source_url, offsets}.
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Do:
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1. Enforce cite-then-explain. If citations are missing, stop and return fix tip.
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2. If ΔS(question, retrieved) ≥ 0.60, propose minimal structural fix referencing:
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retrieval-playbook, retrieval-traceability, data-contracts, rerankers.
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3. Output JSON plan:
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{ "citations": [...], "answer": "...", "λ_state": "...", "ΔS": 0.xx, "next_fix": "..." }
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```
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---
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## Common LangChain gotchas
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* **Async chains** drop context windows or run steps before retrievers return.
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Solution: enforce await barriers, or wrap with guard nodes.
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* **Tool/agent outputs exceed JSON mode limits**
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Add schema locks and contract enforcement before passing downstream.
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* **Retriever mismatch** between indexer and chain (different casing/tokenizer)
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Fix: normalize pipelines, or enable reranking.
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See: [Rerankers](https://github.com/onestardao/WFGY/blob/main/ProblemMap/rerankers.md)
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* **Long context windows collapse into filler**
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Monitor entropy. If collapse, trigger recovery.
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See: [Entropy Collapse](https://github.com/onestardao/WFGY/blob/main/ProblemMap/entropy-collapse.md)
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---
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## When to escalate
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* ΔS remains ≥ 0.60 even after chunking and retriever fixes
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→ Rebuild vectorstore with explicit metric + normalization.
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Spec: [Retrieval Playbook](https://github.com/onestardao/WFGY/blob/main/ProblemMap/retrieval-playbook.md)
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* Identical inputs yield divergent answers
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→ Investigate long-context drift.
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Spec: [Context Drift](https://github.com/onestardao/WFGY/blob/main/ProblemMap/context-drift.md)
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---
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---
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### 🔗 Quick-Start Downloads (60 sec)
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| Tool | Link | 3-Step Setup |
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|------|------|--------------|
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| **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>” |
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| **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 |
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---
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<!-- WFGY_FOOTER_START -->
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### Explore More
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| Layer | Page | What it’s for |
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| --- | --- | --- |
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| Proof | [WFGY Recognition Map](/recognition/README.md) | External citations, integrations, and ecosystem proof |
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| Engine | [WFGY 1.0](/legacy/README.md) | Original PDF based tension engine |
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| Engine | [WFGY 2.0](/core/README.md) | Production tension kernel and math engine for RAG and agents |
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| Engine | [WFGY 3.0](/TensionUniverse/EventHorizon/README.md) | TXT based Singularity tension engine, 131 S class set |
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| Map | [Problem Map 1.0](/ProblemMap/README.md) | Flagship 16 problem RAG failure checklist and fix map |
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| Map | [Problem Map 2.0](/ProblemMap/rag-architecture-and-recovery.md) | RAG focused recovery pipeline |
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| Map | [Problem Map 3.0](/ProblemMap/wfgy-rag-16-problem-map-global-debug-card.md) | Global Debug Card, image as a debug protocol layer |
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| Map | [Semantic Clinic](/ProblemMap/SemanticClinicIndex.md) | Symptom to family to exact fix |
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| Map | [Grandma’s Clinic](/ProblemMap/GrandmaClinic/README.md) | Plain language stories mapped to Problem Map 1.0 |
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| Onboarding | [Starter Village](/StarterVillage/README.md) | Guided tour for newcomers |
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| App | [TXT OS](/OS/README.md) | TXT semantic OS, fast boot |
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| App | [Blah Blah Blah](/OS/BlahBlahBlah/README.md) | Abstract and paradox Q and A built on TXT OS |
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| App | [Blur Blur Blur](/OS/BlurBlurBlur/README.md) | Text to image with semantic control |
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| App | [Blow Blow Blow](/OS/BlowBlowBlow/README.md) | Reasoning game engine and memory demo |
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If this repository helped, starring it improves discovery so more builders can find the docs and tools.
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[](https://github.com/onestardao/WFGY)
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<!-- WFGY_FOOTER_END -->
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