evaluate-skill

evaluate-skill is a skill for Claude Code from 8090-inc/software-factory-plugin. It costs 16 tokens per session (475 once invoked), scanned A, a copy of evaluate-skill, MIT.

A skill for testing an AI skill across three model tiers using blind test agents. It compares their results with expected outcomes and produces a refinement report.

In plain words
What is it for?
Use it to load skill and test-case files, run tests across opus, sonnet, and haiku tiers, assess pass or fail, and write recommendations.
Why use it?
It shows where a skill fails, which model tier handles it reliably, and what instructions should be improved.

Skill for Claude Code

Written for Claude Code: arguments in frontmatter. Also seen: mentions subagents.

Part of the skill-evaluator plugin — 1 skill, 1 command, 2 agents, 1 hook shipped together

Good fit Use it to load skill and test-case files, run tests across opus, sonnet, and haiku tiers, assess pass or fail, and write recommendations.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/8090-inc/software-factory-plugin/evaluate-skill
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add 8090-inc/software-factory-plugin --skill evaluate-skill
Clone the repo
git clone --depth 1 https://github.com/8090-inc/software-factory-plugin

Made for: Claude Code.

Or install skill-evaluator, the plugin that ships this one along with the rest of its 1 skill, 1 command, 2 agents, 1 hook.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for evaluate-skill

README.md
[![agentmods](https://agentmods.dev/badge/skills/8090-inc/software-factory-plugin/evaluate-skill/github.svg)](https://agentmods.dev/skills/8090-inc/software-factory-plugin/evaluate-skill)
Your own site
<a href="https://agentmods.dev/skills/8090-inc/software-factory-plugin/evaluate-skill"><img src="https://agentmods.dev/badge/skills/8090-inc/software-factory-plugin/evaluate-skill/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for evaluate-skill

Your own site · 80×15
<a href="https://agentmods.dev/skills/8090-inc/software-factory-plugin/evaluate-skill"><img src="https://agentmods.dev/badge/skills/8090-inc/software-factory-plugin/evaluate-skill.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 16 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 475 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin 100% copy Near-identical to another mod in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00016 $0.00475
Opus 5.5 $0.00006 $0.00190
Sonnet 5.5 $0.00003 $0.00095
Haiku 4.5 $0.00002 $0.00047

Measured 1mo ago against content hash a72958959a4d, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

evaluate-skill scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

This is a copy

100% identical to evaluate-skill — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

scratch/skill-evaluator/skills/evaluate-skill/SKILL.md · 52 lines

What it actually says

Evaluate Skill

Orchestrate a cross-tier evaluation of an AI skill to determine its clarity and robustness.

Procedure

  1. Load inputs

    • Read the skill file at {{ skill-path }}
    • Read the test cases file at {{ test-cases-path }}
    • Validate that test cases is a JSON array of objects with input and expectedOutcome fields
  2. Set up evaluation matrix

    • Model tiers to test: opus, sonnet, haiku
    • For each tier, for each test case: plan one blind test run
  3. Execute blind tests (highest tier first)

    • For each model tier (opus → sonnet → haiku):
      • For each test case:
        • Spawn a test-subject agent at the current tier
        • Provide it ONLY the skill content and the test case input
        • Do NOT provide the expectedOutcome to the test subject
        • Collect the test subject's output
  4. Evaluate results

    • For each test run, compare the test subject's output against the expectedOutcome
    • Determine pass/fail using semantic similarity (the output need not be identical, but must achieve the same goal)
    • Record: tier, test case index, pass/fail, output summary
  5. Generate refinement report

    • Identify the lowest tier where all test cases pass ("clarity floor")
    • For each failure, analyze WHY the lower-tier agent failed:
      • Ambiguous instructions?
      • Missing context or assumptions?
      • Overly complex multi-step reasoning?
      • Implicit knowledge requirements?
    • Produce specific, actionable recommendations to improve the skill
    • Format as a structured report with sections: Summary, Per-Tier Results, Failure Analysis, Recommendations
  6. Output the report to the user

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 1mo ago First seen · 52 lines · 16 tokens per session scan A a72958959a4d

Subscribe to this mod's changes

evaluate-skill is a skill published in the GitHub repository 8090-inc/software-factory-plugin (8 stars, last pushed 25d ago), licensed MIT. It adds 16 tokens to every session and 475 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 100% identical to evaluate-skill, differing in 0 lines, and is treated as a copy.

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