agentmods.dev

agentic-skill-eval

An agent-evaluation skill examines a library of SKILL.md files, which are instruction files for agents. It identifies which skills could become useful autonomous agents through the /formula-create process.

In plain words
What is it for?
It is for ranking agent-creation candidates, assessing a repository of skills, and checking an agent roster for gaps.
Why use it?
It helps decide which skills are worth converting and reveals missing areas in an existing set of agents.

Skill for Claude CodeCodex

3 10d ago A scan 61 tokens AGPL-3.0
View the source file stempeck/agentfactory
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.

agentmods
npx agentmods add skills/stempeck/agentfactory/agentic-skill-eval
Any agent
npx skills add stempeck/agentfactory --skill agentic-skill-eval
Clone the repo
git clone --depth 1 https://github.com/stempeck/agentfactory

Made for: Claude Code, Codex.

Per session 61 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,347 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. Scan, not verified.
Origin unknown No closer match found 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 $0.00061 $0.02347
Opus 5 $0.00030 $0.01174
Sonnet 5 $0.00012 $0.00469
Haiku 4.5 $0.00006 $0.00235

Measured 2d ago against content hash a3cb5879f690, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

agentic-skill-eval scanned grade A with 1 finding 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 2d 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.

Reads agent configuration directorieslowAgent snooping

.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.

find . -name "SKILL.md" -not -path "./.agentfactory/*" -not -path "./.codex/*" -not -path "./.gemini/*" | sort

Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.

.claude/skills/agentic-skill-eval/SKILL.md · 187 lines

The source is not reproduced here

Licensed AGPL-3.0

The repository is licensed AGPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

Read it on GitHub

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. 2d ago First seen · 187 lines · 61 tokens per session scan A a3cb5879f690

Subscribe to this mod's changes

agentic-skill-eval is a skill published in the GitHub repository stempeck/agentfactory (3 stars, last pushed 10d ago), licensed AGPL-3.0. It adds 61 tokens to every session and 2,347 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 1 finding (reads agent configuration directories). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

Building agentsagenticagentic-aiagentic-codingagentic-workflowclaudeclaude-code
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