review-skill

review-skill is a skill for Claude Code, Codex from agentskill-sh/ags. It costs 90 tokens per session (1,060 once invoked), scanned A, original, MIT.

A reviewer for SKILL.md files, which are instruction files that teach an AI agent how to handle a particular task.

In plain words
What is it for?
Use it to assess and improve an agent skill after writing it, editing it, or investigating why it performs inconsistently.
Why use it?
It helps find unclear, incomplete, or poorly structured instructions before other agents use them.

Skill for Claude CodeCodex

Part of the learn plugin — 2 skills shipped together

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/agentskill-sh/ags/review-skill
Any agent
npx skills add agentskill-sh/ags --skill review-skill
Clone the repo
git clone --depth 1 https://github.com/agentskill-sh/ags

Made for: Claude Code, Codex.

Or install learn, the plugin that ships this one along with the rest of its 2 skills.

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 review-skill

README.md
[![agentmods](https://agentmods.dev/badge/skills/agentskill-sh/ags/review-skill.svg)](https://agentmods.dev/skills/agentskill-sh/ags/review-skill)
Your own site
<a href="https://agentmods.dev/skills/agentskill-sh/ags/review-skill"><img src="https://agentmods.dev/badge/skills/agentskill-sh/ags/review-skill.svg" alt="Measured on agentmods" height="20"></a>
Per session 90 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,060 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original 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 $0.00090 $0.01060
Opus 5 $0.00045 $0.00530
Sonnet 5 $0.00018 $0.00212
Haiku 4.5 $0.00009 $0.00106

Measured 4d ago against content hash db60691813e1, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

review-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 4d 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.

skills/review-skill/SKILL.md · 122 lines

How it starts

The opening of the file, as written. The whole thing — 122 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Skill Reviewer

Review agent skills against best practices and rewrite weak areas.

When to Use

  • After writing or editing a SKILL.md
  • Before publishing a skill to agentskill.sh or sharing with a team
  • When a skill underperforms (low ratings, poor triggering, inconsistent output)
  • When asked to audit, review, or improve a skill

Review Process

Step 1: Read the Skill

Read the full SKILL.md and all referenced files (references/, scripts/, assets/). Note the skill's purpose, target audience, and complexity.

Step 2: Score Against 10 Dimensions

Evaluate each dimension on a 1-5 scale using the rubric in references/rubric.md.

Skill Review: <skill-name>

| # | Dimension              | Score | Key Issue                        |
|---|------------------------|-------|----------------------------------|
| 1 | Frontmatter            | ?/5   |                                  |
| 2 | Description Quality    | ?/5   |                                  |
| 3 | Conciseness            | ?/5   |                                  |
| 4 | Structure              | ?/5   |                                  |
| 5 | Instruction Clarity    | ?/5   |                                  |
| 6 | Freedom Calibration    | ?/5   |                                  |
| 7 | Error Handling         | ?/5   |                                  |
| 8 | Progressive Disclosure | ?/5   |                                  |
| 9 | Scripts Quality        | ?/5   |                                  |
|10 | Completeness           | ?/5   |                                  |

Overall: ?/50

Step 3: List Specific Issues

For each dimension scoring 3 or below, list concrete issues:

### Issues

1. [D2] Description is 15 characters, too vague to trigger reliably
2. [D3] Lines 45-80 explain what a CSV is; the agent already knows this
3. [D6] Three PDF libraries listed as equal options; pick a default

Step 4: Rewrite Problem Areas

For each issue, show the current text and a rewritten version. Apply changes directly if the user asks for it, otherwise present as suggestions.

Read the full file on GitHub · 122 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 4d ago First seen · 122 lines · 90 tokens per session scan A db60691813e1

Subscribe to this mod's changes

review-skill is a skill published in the GitHub repository agentskill-sh/ags (35 stars, last pushed 3mo ago), licensed MIT. It adds 90 tokens to every session and 1,060 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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