Plugin Eval

Plugin Eval

Use this as the beginner-friendly umbrella entrypoint for local Codex skill and plugin evaluation.

Start Here

1. Resolve whether the target path is a skill, a plugin, or another local folder.
2. Prefer the chat-first router when the user speaks naturally or is not sure which command they need:

plugin-eval start <path> --request "<user request>" --format markdown

3. Route natural chat requests to the matching workflow:
   • "Give me an analysis of the game dev skill." -> resolve the named skill path, run plugin-eval analyze <path> --format markdown, then initialize a benchmark and show the setup questions needed to tailor benchmark.json
   • "Evaluate this skill." -> plugin-eval analyze <path> --format markdown
   • "Why did this score that way?" -> plugin-eval analyze <path> --format markdown
   • "What should I fix first?" -> plugin-eval analyze <path> --format markdown
   • "Explain the token budget for this skill." -> plugin-eval explain-budget <path> --format markdown
   • "Measure the real token usage of this skill." -> benchmark flow, then plugin-eval measurement-plan
   • "Help me benchmark this plugin." -> starter benchmark flow
   • "What should I run next?" -> plugin-eval start <path> --request "What should I run next?" --format markdown
4. If the user wants rewrite help after evaluation, route to ../improve-skill/SKILL.md.
5. If the user wants a custom rubric, route to ../metric-pack-designer/SKILL.md.
6. If the user names a skill instead of giving a path, resolve it locally before running commands:
   • check ~/.codex/skills/<skill-name> first
   • then check any repo-local skills/<skill-name> directory
   • if the name is still ambiguous, ask one short clarifying question before continuing
7. When the request sounds like "analysis" rather than just "evaluate", do the fuller path:
   • run the report
   • initialize .plugin-eval/benchmark.json
   • surface the setup questions that will refine the starter scenarios
   • preview the dry-run command the user can execute next

Chat Requests To Recognize

• Give me an analysis of the game dev skill.
• Evaluate this skill.
• Evaluate this plugin.
• Why did this score that way?
• What should I fix first?
• Explain the token budget for this skill.
• Measure the real token usage of this skill.
• Help me benchmark this plugin.
• What should I run next?

Matching Commands

plugin-eval start <path> --request "Evaluate this skill." --format markdown
plugin-eval start <path> --request "Give me a full analysis of this skill, including benchmark setup." --format markdown
plugin-eval analyze <path> --format markdown
plugin-eval explain-budget <path> --format markdown
plugin-eval measurement-plan <path> --format markdown
plugin-eval init-benchmark <path>
plugin-eval benchmark <path> --dry-run
plugin-eval benchmark <path>

Output Expectations

• Prefer the JSON result as the source of truth.
• Lead with At a Glance, Why It Matters, Fix First, and Recommended Next Step.
• Keep the why content terse and easy to skim.
• Call out whether budget numbers are static estimates or measured harness results.
• Show the user the exact chat phrase they can reuse next, the plugin-eval start command that routes it, and the first local workflow command behind it.
• When the user asks for an analysis of a named skill, do not stop at the report if benchmark setup is still missing.
• When the user is asking about a skill specifically, hand off to ../evaluate-skill/SKILL.md.
• When the user is asking about a plugin bundle, hand off to ../evaluate-plugin/SKILL.md.

References

• references/chat-first-workflows.md
• references/technical-design.md
• references/evaluation-result-schema.md