prompt-evaluation-runner

name	prompt-evaluation-runner
description	Use when evaluating prompts, LLM outputs, red-team suites, or model behavior with local eval configs and safe provider/cost controls.

Prompt Evaluation Runner

When to use

Use this skill when you need to evaluate an LLM app, test a prompt, or run red-teaming/vulnerability scans against a target model or application.

Requirements / Checks

1. Check if an evaluation tool is defined in project deps, scripts, lockfiles, or local toolchain.
2. Do not run external commands like npx Prompt evaluation@latest directly.
3. If missing, ask before adding a local dev dependency or using an ephemeral runner.
4. Confirm expected cost, provider, API keys, and network target before execution.

Workflow

1. Define risk: State target behavior, failure mode, provider(s), and budget limits.
2. Choose assertions: Prefer deterministic checks first: exact/contains/regex/JSON/schema/javascript/python/cost/latency.
3. Use model graders sparingly: Pin grader provider/model and explain cost/non-determinism.
4. Configure minimally: Keep config to description, env refs, prompts, providers, default assertions, and tests.
5. Handle env safely: Use templated env references such as {{env.NAME}}; never hardcode keys.
6. Execute locally: Run smallest suite first. Ask before long, paid, red-team, or production-targeted runs.
7. Analyze failures: Separate prompt failures, provider variance, flaky graders, bad fixtures, and config mistakes.

Safety Constraints

• Do NOT log, echo, or store secrets (API keys) in configuration files or chat output.
• Do NOT run evaluations against production endpoints without user consent.
• Avoid executing arbitrary remote code or unvetted plugins during evaluation.

Validation / Done Criteria

• Evaluation config is valid, minimal, and uses safe env refs.
• Deterministic assertions exist where possible.
• Run scope, provider, and cost are reported.
• Results are summarized without leaking sensitive data.

References

• references/eval-config-patterns.md