# Eval Observability — Evaluation Playbook

A compact playbook to **stabilize evaluation** and ensure results are reproducible.  
Use this when metrics look inconsistent, coverage drifts, or benchmarks feel untrustworthy.

---

## Core acceptance

- **ΔS(question, retrieved) ≤ 0.45**  
- **Coverage ≥ 0.70** to target section  
- **λ remains convergent** across 3 paraphrases and 2 seeds  
- **Variance ratio ≤ 0.15** across seed runs  
- **No monotonic downward drift** beyond 3 windows  

---

## Step 1 — Regression Gate

Run a gate before promoting new models or retrievers.  
- Require ΔS ≤ 0.45 and coverage ≥ 0.70 on 3 paraphrases.  
- Block deploy if λ flips divergent.  
Open: [regression_gate.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/GlobalFixMap/Eval_Observability/regression_gate.md)

---

## Step 2 — Alerting and Probes

Set live probes to catch collapse early.  
- Alert when ΔS ≥ 0.60 or λ flips.  
- Emit logs for coverage gaps, drift slopes, entropy rises.  
Open: [alerting_and_probes.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/GlobalFixMap/Eval_Observability/alerting_and_probes.md)

---

## Step 3 — Coverage Tracking

Measure **retrieved vs target section** alignment.  
- At least 70% coverage on gold targets.  
- Track section-level recall, not just overall hit-rate.  
Open: [coverage_tracking.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/GlobalFixMap/Eval_Observability/coverage_tracking.md)

---

## Step 4 — ΔS Thresholds

Normalize ΔS scoring and enforce thresholds.  
- Stable < 0.40  
- Transitional 0.40–0.60  
- Collapse ≥ 0.60  
Open: [deltaS_thresholds.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/GlobalFixMap/Eval_Observability/deltaS_thresholds.md)

---

## Step 5 — λ Observe

Use λ probes to detect schema drift.  
- Run same query across seeds and paraphrases.  
- If λ flips, lock schema and enforce reranker.  
Open: [lambda_observe.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/GlobalFixMap/Eval_Observability/lambda_observe.md)

---

## Step 6 — Variance and Drift

Log variance ratios and detect slow regressions.  
- Variance ratio ≤ 0.15  
- Drift slope ≤ 0.02 per batch  
- Alert if monotonic decline lasts 3+ windows  
Open: [variance_and_drift.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/GlobalFixMap/Eval_Observability/variance_and_drift.md)

---

## Step 7 — Audit & Escalation

If instability remains:  
- Rebuild embeddings with [embedding-vs-semantic.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/embedding-vs-semantic.md)  
- Patch retriever fragmentation with [vectorstore-fragmentation.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/vectorstore-fragmentation.md)  
- Apply reranking schema: [rerankers.md](https://github.com/onestardao/WFGY/blob/main/ProblemMap/rerankers.md)  

---

## Copy-paste eval contract

```yaml
eval_contract:
  seeds: 3
  paraphrases: 3
  targets:
    deltaS: <=0.45
    coverage: >=0.70
    lambda: convergent
    variance: <=0.15
    drift: <=0.02
alerts:
  - deltaS >=0.60
  - lambda divergent
  - drift slope >0.02
````

---

### 🔗 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)
 
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