WFGY/ProblemMap/GlobalFixMap/Agents_Orchestration/llamaindex.md

# LlamaIndex — Guardrails and Fix Patterns

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Use this when your stack uses **LlamaIndex** (indices, query engines, retrievers, routers, agents) and you see wrong snippets, unstable reasoning, mixed sources, or silent failures that look fine in logs.

**Acceptance targets**
- ΔS(question, retrieved) ≤ 0.45
- coverage ≥ 0.70 to the intended section or record
- λ stays convergent across 3 paraphrases

---

## Typical breakpoints → exact fixes

- Retrieval returns plausible but wrong chunks  
  Fix No.1: **Hallucination and Chunk Drift** →  
  [Hallucination](https://github.com/onestardao/WFGY/blob/main/ProblemMap/hallucination.md)  
  Also review the **Retrieval Playbook** →  
  [Retrieval Playbook](https://github.com/onestardao/WFGY/blob/main/ProblemMap/retrieval-playbook.md)

- High vector similarity, wrong meaning  
  Fix No.5: **Embedding ≠ Semantic** →  
  [Embedding ≠ Semantic](https://github.com/onestardao/WFGY/blob/main/ProblemMap/embedding-vs-semantic.md)

- Hybrid retrieval or RouterQueryEngine degrades compared to single retriever  
  Pattern: **Query Parsing Split** →  
  [Query Parsing Split](https://github.com/onestardao/WFGY/blob/main/ProblemMap/patterns/pattern_query_parsing_split.md)  
  Add ordering control with **Rerankers** →  
  [Rerankers](https://github.com/onestardao/WFGY/blob/main/ProblemMap/rerankers.md)

- Facts exist in the store but never show up  
  Pattern: **Vectorstore Fragmentation** →  
  [Vectorstore Fragmentation](https://github.com/onestardao/WFGY/blob/main/ProblemMap/patterns/pattern_vectorstore_fragmentation.md)

- Citations missing or inconsistent between retriever and response synthesizer  
  Fix No.8: **Retrieval Traceability** + **Data Contracts** →  
  [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)

- Long pipelines flatten tone and drift logically  
  Fix No.3 and No.9: **Context Drift** and **Entropy Collapse** →  
  [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)

- Agents loop, roles blur, or memory overwrites facts  
  Fix No.13: **Multi-Agent Chaos** →  
  [Multi-Agent Problems](https://github.com/onestardao/WFGY/blob/main/ProblemMap/Multi-Agent_Problems.md) ·
  [Role Drift](https://github.com/onestardao/WFGY/blob/main/ProblemMap/multi-agent-chaos/role-drift.md) ·
  [Memory Overwrite](https://github.com/onestardao/WFGY/blob/main/ProblemMap/multi-agent-chaos/memory-overwrite.md)

- Confident tone but wrong answer  
  Fix No.4: **Bluffing and Overconfidence** →  
  [Bluffing](https://github.com/onestardao/WFGY/blob/main/ProblemMap/bluffing.md)

- Model merges two sources into one response  
  Pattern: **Symbolic Constraint Unlock** →  
  [Symbolic Constraint Unlock](https://github.com/onestardao/WFGY/blob/main/ProblemMap/patterns/pattern_symbolic_constraint_unlock.md)

---

## Minimal LlamaIndex pattern with WFGY checks

```python
# Pseudocode. Control points you must keep.
from llama_index.core import VectorStoreIndex
from llama_index.core.query_engine import RetrieverQueryEngine

# build index with explicit metric and normalization
index = VectorStoreIndex.from_documents(
    docs,
    embed_model=embedder,   # keep the same fn for write and read
)

retriever = index.as_retriever(similarity_top_k=10)
qe = RetrieverQueryEngine.from_args(retriever)

def assemble_prompt(context, q):
    # schema-locked: system -> task -> constraints -> citations -> answer
    return prompt.render(context=context, question=q)

def reason(msg):
    # require cite then explain in the template
    return llm(msg)

def wfgy_checks(q, context, answer):
    # compute ΔS(question, context) and record snippet↔citation mapping
    # fail fast when ΔS ≥ 0.60 or λ divergent
    return metrics_and_trace(q, context, answer)

def run(q):
    nodes = retriever.retrieve(q)
    context = join_nodes(nodes)
    msg = assemble_prompt(context, q)
    answer = reason(msg)
    return wfgy_checks(q, context, answer)
````

**What this enforces**

* Retrieval is observable and parameterized.
* Prompt is schema locked with cite first.
* WFGY check runs after generation and can stop the run when ΔS is high or λ flips.
* Traces record snippet to citation mapping for audits.

Reference specs
[RAG Architecture & Recovery](https://github.com/onestardao/WFGY/blob/main/ProblemMap/rag-architecture-and-recovery.md) ·
[Retrieval Playbook](https://github.com/onestardao/WFGY/blob/main/ProblemMap/retrieval-playbook.md) ·
[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)

---

## LlamaIndex-specific gotchas

* Mixed embedding functions or metrics between ingestion and query. Rebuild with explicit metric and unit normalization.
  See [Embedding ≠ Semantic](https://github.com/onestardao/WFGY/blob/main/ProblemMap/embedding-vs-semantic.md)

* ResponseSynthesizer rewrites citations. Enforce cite first and lock section ids.
  See [Retrieval Traceability](https://github.com/onestardao/WFGY/blob/main/ProblemMap/retrieval-traceability.md)

* RouterQueryEngine sends different tokenizations to dense and sparse backends. Unify analyzers first.
  See [Query Parsing Split](https://github.com/onestardao/WFGY/blob/main/ProblemMap/patterns/pattern_query_parsing_split.md)

* Persistence reloads with a different embedder when swapping models. Pin versions and validate store headers.
  See [Pre-Deploy Collapse](https://github.com/onestardao/WFGY/blob/main/ProblemMap/predeploy-collapse.md)

* Agent tool loops with vague stopping rules. Add BBCR bridge steps and clamp variance with BBAM in the prompt.
  See [Logic Collapse](https://github.com/onestardao/WFGY/blob/main/ProblemMap/logic-collapse.md)

---

## When to escalate

* ΔS remains ≥ 0.60 after chunking and retrieval fixes
  Work through the playbook and rebuild index parameters.
  [Retrieval Playbook](https://github.com/onestardao/WFGY/blob/main/ProblemMap/retrieval-playbook.md)

* Answers flip between runs or sessions
  Verify version skew and session state.
  [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 + \<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)** — <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.

<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)
 
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</div>