eval

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Evaluate and rank agent results by metric or LLM judge for an AgentHub session.

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NPX Install

npx skill4agent add alirezarezvani/claude-skills eval

Tags

Translated version includes tags in frontmatter

/hub:eval — Evaluate Agent Results

Rank all agent results for a session. Supports metric-based evaluation (run a command), LLM judge (compare diffs), or hybrid.

Usage

/hub:eval                           # Eval latest session using configured criteria
/hub:eval 20260317-143022           # Eval specific session
/hub:eval --judge                   # Force LLM judge mode (ignore metric config)

What It Does

Metric Mode (eval command configured)

Run the evaluation command in each agent's worktree:
bash
python {skill_path}/scripts/result_ranker.py \
  --session {session-id} \
  --eval-cmd "{eval_cmd}" \
  --metric {metric} --direction {direction}
Output:
RANK  AGENT       METRIC      DELTA      FILES
1     agent-2     142ms       -38ms      2
2     agent-1     165ms       -15ms      3
3     agent-3     190ms       +10ms      1

Winner: agent-2 (142ms)

LLM Judge Mode (no eval command, or --judge flag)

For each agent:
  1. Get the diff:
    git diff {base_branch}...{agent_branch}
  2. Read the agent's result post from
    .agenthub/board/results/agent-{i}-result.md
  3. Compare all diffs and rank by:
    • Correctness — Does it solve the task?
    • Simplicity — Fewer lines changed is better (when equal correctness)
    • Quality — Clean execution, good structure, no regressions
Present rankings with justification.
Example LLM judge output for a content task:
RANK  AGENT    VERDICT                               WORD COUNT
1     agent-1  Strong narrative, clear CTA            1480
2     agent-3  Good data points, weak intro           1520
3     agent-2  Generic tone, no differentiation       1350

Winner: agent-1 (strongest narrative arc and call-to-action)

Hybrid Mode

  1. Run metric evaluation first
  2. If top agents are within 10% of each other, use LLM judge to break ties
  3. Present both metric and qualitative rankings

After Eval

  1. Update session state:
bash
python {skill_path}/scripts/session_manager.py --update {session-id} --state evaluating
  1. Tell the user:
    • Ranked results with winner highlighted
    • Next step:
      /hub:merge
      to merge the winner
    • Or
      /hub:merge {session-id} --agent {winner}
      to be explicit