skill-reviewer

skill-reviewer is an agent for Claude Code from pjt222/agent-almanac. It costs 27 tokens per session (1,608 once invoked), scanned A, original, MIT.

A reviewer for SKILL.md files, which are instruction files that define how coding-agent skills work.

In plain words
What is it for?
Use it to validate front matter and required sections, assess procedure quality, split large skills, and check registry references.
Why use it?
It catches format problems, unclear procedures, missing checks, and overly long files that make skills harder to use and maintain.

Agent for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: model in frontmatter.

Part of the agent-almanac plugin — 122 skills, 76 agents shipped together

Good fit Use it to validate front matter and required sections, assess procedure quality, split large skills, and check registry references.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/pjt222/agent-almanac/skill-reviewer
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.

Clone the repo
git clone --depth 1 https://github.com/pjt222/agent-almanac

Made for: Claude Code.

Or install agent-almanac, the plugin that ships this one along with the rest of its 122 skills, 76 agents.

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 skill-reviewer

README.md
[![agentmods](https://agentmods.dev/badge/agents/pjt222/agent-almanac/skill-reviewer/github.svg)](https://agentmods.dev/agents/pjt222/agent-almanac/skill-reviewer)
Your own site
<a href="https://agentmods.dev/agents/pjt222/agent-almanac/skill-reviewer"><img src="https://agentmods.dev/badge/agents/pjt222/agent-almanac/skill-reviewer/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 skill-reviewer

Your own site · 80×15
<a href="https://agentmods.dev/agents/pjt222/agent-almanac/skill-reviewer"><img src="https://agentmods.dev/badge/agents/pjt222/agent-almanac/skill-reviewer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 27 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,608 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 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 5.1 $0.00027 $0.01608
Opus 5 $0.00014 $0.00804
Sonnet 5 $0.00005 $0.00322
Haiku 4.5 $0.00003 $0.00161

Measured 5d ago against content hash c26348fbca2b, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

skill-reviewer 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 5d 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.

agents/skill-reviewer.md · 157 lines

How it starts

The opening of the file, as written. The whole thing — 157 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Skill Reviewer Agent

A specialized agent that reviews and improves SKILL.md files for compliance with the agentskills.io open standard. The skill reviewer validates frontmatter schemas, assesses content quality, refactors over-long skills using progressive disclosure, and verifies registry synchronization.

Purpose

This agent ensures every skill in the library meets the agentskills.io standard by performing structured reviews of SKILL.md files. It validates format compliance, identifies content gaps, and refactors skills that have grown beyond the 500-line limit. Unlike the code-reviewer (which reviews application code), the skill-reviewer operates exclusively on the skill specification layer — frontmatter, procedures, validation checklists, and cross-references.

Capabilities

  • Format Validation: Verify YAML frontmatter fields, required sections, procedure step patterns, and line count limits
  • Content Quality Assessment: Evaluate procedure clarity, Expected/On failure completeness, validation testability, and pitfall specificity
  • Structural Refactoring: Extract bloated sections to references/EXAMPLES.md, split compound procedures, reorganize for progressive disclosure
  • Registry Sync Checking: Verify skills are listed in _registry.yml with correct domain, path, and metadata

Available Skills

Review

  • review-skill-format: Validate a SKILL.md file against the agentskills.io standard checking frontmatter, sections, procedure format, line count, and registry sync
  • update-skill-content: Improve an existing SKILL.md by refining procedures, expanding pitfalls, syncing related skills, and bumping the version
  • refactor-skill-structure: Refactor an over-long or poorly structured SKILL.md by extracting examples, splitting procedures, and applying progressive disclosure
  • evolve-skill-from-traces: Evolve SKILL.md files from agent execution traces using a three-stage pipeline (trace → diff → refine)

Read the full file on GitHub · 157 lines

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. 5d ago First seen · 157 lines · 27 tokens per session scan A c26348fbca2b

Subscribe to this mod's changes

skill-reviewer is an agent published in the GitHub repository pjt222/agent-almanac (32 stars, last pushed today), licensed MIT. It adds 27 tokens to every session and 1,608 once invoked, about $0.0001 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 2026-09-03.

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