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Eval Observability — Alerting and Probes
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- Eval_Observability — evaluation metrics and system observability
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A live guardrail system that detects semantic drift, retrieval collapse, and logic instability in production.
Use this page to design continuous probes (ΔS, λ, coverage, resonance) and trigger alerts before users see failures.
Why probes are required
- Silent regressions: Models may degrade gradually after retraining or infra changes.
- Runtime entropy: Long chains often destabilize after 25–40 steps.
- Hybrid stack drift: Store upgrades, reranker weights, or tokenizer shifts silently change outcomes.
- Auditability: Real-time probes make every failure reproducible.
Core probe dimensions
| Metric | Probe type | Alert condition |
|---|---|---|
| ΔS(question, retrieved) | per-query | ≥ 0.60 for any query OR average >0.50 across batch |
| Coverage of target section | per-query | < 0.70 for more than 5% of batch |
| λ_observe | rolling window | divergence observed across 2 seeds or paraphrases |
| E_resonance | sliding horizon | spikes or oscillations in 50–100 step runs |
Recommended probe architecture
-
Pre-query probe
Check retriever config hash, index hash, analyzer type.
Block if mismatched against gold baseline. -
Mid-query probe
During retrieval, compute ΔS(question, retrieved).
Attach snippet IDs and offsets for traceability. -
Post-query probe
Run λ stability check across 3 paraphrases.
If divergent, tag output withunstable=true. -
Long-chain probe
For conversations >25 steps, sample entropy and E_resonance every 10 steps.
Trigger backoff or memory split if instability rises.
Alerting routes
- Slack / Teams → Send structured JSON logs with ΔS, λ, coverage, index hash, retriever config.
- PagerDuty → Trigger incidents only when threshold failures exceed N in M minutes.
- Dashboards → Grafana/Datadog with ΔS trend lines, λ variance plots, coverage histograms.
- Audit store → Write all probe outputs to KV or DB keyed by
(session_id, index_hash, retriever_config).
Example probe config (YAML)
probes:
deltaS:
threshold: 0.60
action: alert
coverage:
threshold: 0.70
tolerance: 0.05
lambda:
seeds: 2
paraphrases: 3
action: block
resonance:
horizon: 100
action: degrade_notice
alerting:
sink:
- slack
- pagerduty
- grafana
Common mistakes
- Only probing ΔS. Always include coverage + λ + resonance.
- Static thresholds. Thresholds must be tested against gold sets and updated quarterly.
- No audit linkage. Alerts without index hash and retriever config cannot be replayed.
- Flooding alerts. Use capped retries and aggregate rules to avoid pager fatigue.
🔗 Quick-Start Downloads (60 sec)
| Tool | Link | 3-Step Setup |
|---|---|---|
| WFGY 1.0 PDF | Engine Paper | 1️⃣ Download · 2️⃣ Upload to your LLM · 3️⃣ Ask “Answer using WFGY + <your question>” |
| TXT OS (plain-text OS) | TXTOS.txt | 1️⃣ Download · 2️⃣ Paste into any LLM chat · 3️⃣ Type “hello world” — OS boots instantly |
Explore More
| Layer | Page | What it’s for |
|---|---|---|
| ⭐ Proof | WFGY Recognition Map | External citations, integrations, and ecosystem proof |
| ⚙️ Engine | WFGY 1.0 | Original PDF tension engine and early logic sketch (legacy reference) |
| ⚙️ Engine | WFGY 2.0 | Production tension kernel for RAG and agent systems |
| ⚙️ Engine | WFGY 3.0 | TXT based Singularity tension engine (131 S class set) |
| 🗺️ Map | Problem Map 1.0 | Flagship 16 problem RAG failure taxonomy and fix map |
| 🗺️ Map | Problem Map 2.0 | Global Debug Card for RAG and agent pipeline diagnosis |
| 🗺️ Map | Problem Map 3.0 | Global AI troubleshooting atlas and failure pattern map |
| 🧰 App | TXT OS | .txt semantic OS with fast bootstrap |
| 🧰 App | Blah Blah Blah | Abstract and paradox Q&A built on TXT OS |
| 🧰 App | Blur Blur Blur | Text to image generation with semantic control |
| 🏡 Onboarding | Starter Village | Guided entry point for new users |
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