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phoenix-evals

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SKILL.md

Phoenix Evals

Build evaluators for AI/LLM applications. Code first, LLM for nuance, validate against humans.

Supply-Chain Policy

All install commands in the references/ files must use pinned versions via committed dependency files.

Python: Use pip install -r requirements.txt where requirements.txt is generated with pip-compile --generate-hashes. Do not run bare pip install <package> commands at agent-runtime.
TypeScript: Use npm ci against a committed package-lock.json. Do not run bare npm install <package> commands at agent-runtime.

Quick Reference

Task	Files
Setup	setup-python, setup-typescript
Decide what to evaluate	evaluators-overview
Choose a judge model	fundamentals-model-selection
Use pre-built evaluators	evaluators-pre-built
Build code evaluator	evaluators-code-python, evaluators-code-typescript
Build LLM evaluator	evaluators-llm-python, evaluators-llm-typescript, evaluators-custom-templates
Batch evaluate DataFrame	evaluate-dataframe-python
Understand experiments	experiments-overview
Run experiment	experiments-running-python, experiments-running-typescript
Create dataset	experiments-datasets-python, experiments-datasets-typescript
Generate synthetic data	experiments-synthetic-python, experiments-synthetic-typescript
Validate evaluator accuracy	validation, validation-evaluators-python, validation-evaluators-typescript
Sample traces for review	observe-sampling-python, observe-sampling-typescript
Analyze errors	error-analysis, error-analysis-multi-turn, axial-coding
RAG evals	evaluators-rag
Avoid common mistakes	common-mistakes-python, fundamentals-anti-patterns
Production	production-overview, production-guardrails, production-continuous

Workflows

Starting Fresh: observe-tracing-setup → error-analysis → axial-coding → evaluators-overview

Building Evaluator: fundamentals → common-mistakes-python → evaluators-{code|llm}-{python|typescript} → validation-evaluators-{python|typescript}

RAG Systems: evaluators-rag → evaluators-code-* (retrieval) → evaluators-llm-* (faithfulness)

Production: production-overview → production-guardrails → production-continuous

Reference Categories

Prefix	Description
`fundamentals-*`	Types, scores, anti-patterns
`observe-*`	Tracing, sampling
`error-analysis-*`	Finding failures
`axial-coding-*`	Categorizing failures
`evaluators-*`	Code, LLM, RAG evaluators
`experiments-*`	Datasets, running experiments
`validation-*`	Validating evaluator accuracy against human labels
`production-*`	CI/CD, monitoring

Key Principles

Principle	Action
Error analysis first	Can't automate what you haven't observed
Custom > generic	Build from your failures
Code first	Deterministic before LLM
Validate judges	>80% TPR/TNR
Binary > Likert	Pass/fail, not 1-5

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Provenance

Upstream source

—

Upstream commitc73936e05eea186dd9970db9e97c104d7e77a644

OCI reference

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License

MIT

Files

HARDENING.md

LICENSE

SKILL.md

references/axial-coding.md

references/common-mistakes-python.md

references/error-analysis-multi-turn.md

references/error-analysis.md

references/evaluate-dataframe-python.md

references/evaluators-code-python.md

references/evaluators-code-typescript.md

references/evaluators-custom-templates.md

references/evaluators-llm-python.md

references/evaluators-llm-typescript.md

references/evaluators-overview.md

references/evaluators-pre-built.md

references/evaluators-rag.md

references/experiments-datasets-python.md

references/experiments-datasets-typescript.md

references/experiments-overview.md

references/experiments-running-python.md

references/experiments-running-typescript.md

references/experiments-synthetic-python.md

references/experiments-synthetic-typescript.md

references/fundamentals-anti-patterns.md

references/fundamentals-model-selection.md

references/fundamentals.md

references/observe-sampling-python.md

references/observe-sampling-typescript.md

references/observe-tracing-setup.md

references/production-continuous.md

references/production-guardrails.md

references/production-overview.md

references/setup-python.md

references/setup-typescript.md

references/validation-evaluators-python.md

references/validation-evaluators-typescript.md

references/validation.md

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