Skip to content
Development
Skill

/certify

Use when the user wants to verify that the evolved agent's score is stable and reliable. Runs evaluation multiple times and reports mean ± std.

From plugin
harness-evolver
579 skills6 agents1 hook

Claude Code

$ npx -y skills add raphaelchristi/harness-evolver --skill certify --agent claude-code

SKILL.md

certify.SKILL.md
name: harness:certify
description: "Use when the user wants to verify that the evolved agent's score is stable and reliable. Runs evaluation multiple times and reports mean ± std."
allowed-tools: [Read, Bash, Glob]

/harness:certify

Verify score stability by running evaluation multiple times and reporting statistical confidence.

Resolve Tool Path

TOOLS="${EVOLVER_TOOLS:-$([ -d ".evolver/tools" ] && echo ".evolver/tools" || echo "$HOME/.evolver/tools")}"
EVOLVER_PY="${EVOLVER_PY:-$([ -f "$HOME/.evolver/venv/bin/python" ] && echo "$HOME/.evolver/venv/bin/python" || echo "python3")}"

What To Do

Read `.evolver.json` to get the best experiment and dataset.

Run evaluation 3 times on the current code (not a worktree — the best code is already merged):

for i in 1 2 3; do
    $EVOLVER_PY $TOOLS/run_eval.py \
        --config .evolver.json \
        --worktree-path "." \
        --experiment-prefix "certify-run-$i"
done

After all 3 runs complete, read results and compute statistics:

$EVOLVER_PY $TOOLS/read_results.py --experiments "certify-run-1-{suffix},certify-run-2-{suffix},certify-run-3-{suffix}" --config .evolver.json --format summary

Calculate mean and standard deviation from the 3 combined_scores.

Report

CERTIFICATION REPORT
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
Runs:  3
Mean:  {mean:.3f}
Std:   {std:.3f}
Range: {min:.3f} — {max:.3f}

Verdict: {STABLE|UNSTABLE}

**STABLE** (std < 0.05): Score is reliable. The agent performs consistently.

**MARGINAL** (0.05 <= std < 0.10): Score varies moderately. Consider adding rubrics to reduce judge variance.

**UNSTABLE** (std >= 0.10): Score is unreliable. The LLM judge interprets criteria differently across runs. Add few-shot examples or tighter rubrics.

After Certification

If STABLE: suggest `/harness:deploy` to finalize. If UNSTABLE: suggest adding rubrics to dataset examples, or running `/harness:evolve` with `heavy` mode for more thorough evaluation.

Read more
@raphaelchristi
Ships withharness-evolver

Point at any LLM agent codebase. Harness Evolver will autonomously improve it — prompts, routing, tools, architecture — using multi-agent evolution with LangSmith as the evaluation backend.

579 skills6 agents
Get the whole plugin

Stars on GitHub

Momentum

stars in total
57
Star history of raphaelchristi/harness-evolver on GitHub, a chart by star-history.com

Other skills on harness-evolver.

evolve

evolve

Use when the user wants to run the optimization loop, improve agent performance, evolve the agent, or iterate on quality.…

health

health

Use when the user wants to check dataset quality, diagnose eval issues, or before running evolve. Checks size, difficulty…

More skills from other plugins.

brainstorming
Auto-invoked

brainstorming

You MUST use this before any creative work - creating features, building components, adding functionality, modifying behavior, or…

@obra@obraInstall Skill
ask-matt

ask-matt

Ask which skill or flow fits your situation. A router over the skills in this repo.

skills2w309k
@mattpocock@mattpocockInstall Skill
accessibility
Auto-invoked

accessibility

Design, implement, and audit accessible UI to WCAG 2.2 Level AA across Web, iOS, and Android — semantic ARIA roles and labels,…

ecc2w293k
@affaan-m@affaan-mInstall Skill
compiler-commit

compiler-commit

Use when you want to verify compiler changes and commit with the correct convention. Runs tests, lint, and format, then commits…

react5d252k
@facebook@facebookInstall Skill

Questions about certify.

Which coding agents can use certify?
certify installs in Claude Code, Codex, Cursor, Gemini CLI, GitHub Copilot, OpenCode and Windsurf with the skills CLI, using each agent's flag shown on this page. Flowy's auto-invocation, which fires a skill when your prompt matches, runs in Claude Code only.