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Agent & Skill Linter

A lint skill that structurally validates Claude Code agent and skill markdown files — frontmatter, naming, and body rules — so misconfigured files don't fail silently at runtime.

Dev & CodingIntermediate★ 535⑂ 44AI score 8/10Last updated: Aug 8, 2026

What it does

  • Frontmatter validation for agents/*.md and skills/*/SKILL.md: name present, name matching the file/folder name, kebab-case enforcement, description length (20–200 chars), tools as a proper array, valid model values (opus/sonnet)
  • Body validation: system prompt present, warnings for files that are too short (<50 lines) or too long (>2000 lines), at least one ## heading, presence of a code block
  • Every rule is graded as ERROR / WARN / INFO so you know what must be fixed now
  • Ships a copy-paste bash lint script and a GitHub Actions workflow that runs on PRs touching agents or skills
  • A common-mistakes table with fixes (name/filename mismatch, tools: Read, Bash format error, duplicate names, empty agent bodies)

Who it's for

  • Developers maintaining a growing collection of Claude Code agents and skills
  • Teams sharing a skills repo who want a quality gate on pull requests
  • Anyone who has wondered "why is my skill never triggered?"

Examples

  1. After adding code-reviewer.md, run the linter and immediately catch name: codeReviewer not matching the kebab-case filename
  2. Scan the whole repo with bash scripts/lint-agents.sh 2>&1 | tee lint-report.txt, then grep "^ERROR" to triage blocking issues
  3. Wire the provided workflow into CI so every PR touching agents/** or skills/** is linted before merge

· · · Install guide · · ·

Try it now, no install

Paste this into Claude to use the skill without installing anything.

Read the instructions in this file and follow them to help me:
https://raw.githubusercontent.com/vibeeval/vibecosystem/HEAD/skills/agent-linter/SKILL.md

What I want: (describe your task here)

If Claude can't open the link, open it yourself and paste the contents instead.

↓ If it works for you, download the ZIP below and install it. Then it runs on its own — no pasting each time.

Install in the Claude app (no terminal)
  1. Download the ZIP with the button below.
  2. In Claude, open Settings → Capabilities and turn on 'Code execution and file creation'. (one time)
  3. Go to Customize → Skills → + → 'Upload a skill' and upload the ZIP.
↓ Download ZIP
Install in Claude Code

Let Claude do it — paste this into Claude Code

Install the skill I found on Claude Skill Mart.
Copy the skills/agent-linter folder from the GitHub repo vibeeval/vibecosystem into my ~/.claude/skills/agent-linter/.
When it's done, tell me in one line what this skill can do.

Install with a command instead

git clone https://github.com/vibeeval/vibecosystem.git /tmp/vibecosystem && mkdir -p ~/.claude/skills && cp -r /tmp/vibecosystem/skills/agent-linter ~/.claude/skills/

⚠ This is a third-party skill. Check the source repository before installing.

  1. Open a terminal.
  2. Clone the repository to a temp folder: git clone https://github.com/vibeeval/vibecosystem.git /tmp/vibecosystem
  3. Create the skills directory: mkdir -p ~/.claude/skills
  4. Copy just this skill: cp -r /tmp/vibecosystem/skills/agent-linter ~/.claude/skills/
  5. Restart Claude Code and ask "lint my agent files" to confirm the skill is picked up.
  6. (Optional) Save the bash script from SKILL.md as scripts/lint-agents.sh in your project and adjust the agents/ and skills/*/SKILL.md paths to your repo layout.
  7. (Optional) Add the provided GitHub Actions YAML as .github/workflows/lint-agents.yml to run the linter automatically in CI.
  8. Note: the skill's text is written in Turkish; Claude will still follow it, but translate the rule tables if you want them in your own docs.
View source on GitHub ↗License: MIT