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phoenix-evals

Build and run evaluations for AI applications using Phoenix. Start with observed failures, create checks in code or use a language model as a judge, run experiments, and validate automated judgments against human labels.

OriginalShow the original description

Build and run evaluators for AI/LLM applications using Phoenix.

See how to install

Good for

  • Turning observed failures into evaluation criteria
  • Building code-based or language-model evaluators
  • Evaluating retrieval and answer faithfulness in RAG
  • Checking automated judgments against human labels

Files included (35)

  • SKILL.md4.5 KB
  • references/axial-coding.md2.3 KB
  • references/common-mistakes-python.md7.0 KB
  • references/error-analysis-multi-turn.md1.3 KB
  • references/error-analysis.md4.2 KB
  • references/evaluate-dataframe-python.md4.4 KB
  • references/evaluators-code-python.md3.0 KB
  • references/evaluators-code-typescript.md1.2 KB
  • references/evaluators-custom-templates.md1.2 KB
  • references/evaluators-llm-python.md2.6 KB
  • references/evaluators-llm-typescript.md1.4 KB
  • references/evaluators-overview.md1.1 KB
  • references/evaluators-pre-built.md2.4 KB
  • references/evaluators-rag.md3.1 KB
  • references/experiments-datasets-python.md4.8 KB
  • references/experiments-datasets-typescript.md2.7 KB
  • references/experiments-overview.md1.7 KB
  • references/experiments-running-python.md2.9 KB
  • references/experiments-running-typescript.md3.1 KB
  • references/experiments-synthetic-python.md1.8 KB
  • references/experiments-synthetic-typescript.md2.2 KB
  • references/fundamentals-anti-patterns.md1.6 KB
  • references/fundamentals-model-selection.md1.4 KB
  • references/fundamentals.md1.8 KB
  • references/observe-sampling-python.md2.4 KB
  • references/observe-sampling-typescript.md3.9 KB
  • references/observe-tracing-setup.md3.3 KB
  • references/production-continuous.md3.6 KB
  • references/production-guardrails.md1.3 KB
  • references/production-overview.md2.3 KB
  • references/setup-python.md1.9 KB
  • references/setup-typescript.md981 B
  • references/validation-evaluators-python.md1.0 KB
  • references/validation-evaluators-typescript.md4.4 KB
  • references/validation.md1.7 KB

SKILL.md (original)

Review the instructions the agent will receive before you install.

Phoenix Evals

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

Quick Reference

TaskFiles
Setupsetup-python, setup-typescript
Decide what to evaluateevaluators-overview
Choose a judge modelfundamentals-model-selection
Use pre-built evaluatorsevaluators-pre-built
Build code evaluatorevaluators-code-python, evaluators-code-typescript
Build LLM evaluatorevaluators-llm-python, evaluators-llm-typescript, evaluators-custom-templates
Batch evaluate DataFrameevaluate-dataframe-python
Understand experimentsexperiments-overview
Run experimentexperiments-running-python, experiments-running-typescript
Create datasetexperiments-datasets-python, experiments-datasets-typescript
Generate synthetic dataexperiments-synthetic-python, experiments-synthetic-typescript
Validate evaluator accuracyvalidation, validation-evaluators-python, validation-evaluators-typescript
Sample traces for reviewobserve-sampling-python, observe-sampling-typescript
Analyze errorserror-analysis, error-analysis-multi-turn, axial-coding
RAG evalsevaluators-rag
Avoid common mistakescommon-mistakes-python, fundamentals-anti-patterns
Productionproduction-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

PrefixDescription
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

PrincipleAction
Error analysis firstCan't automate what you haven't observed
Custom > genericBuild from your failures
Code firstDeterministic before LLM
Validate judges>80% TPR/TNR
Binary > LikertPass/fail, not 1-5

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