Lint skills workflow (jezweb/claude-skills)

The Lint skills workflow from jezweb/claude-skills, explained and optimized by Latchkey.

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Source: jezweb/claude-skills.github/workflows/skill-lint.ymlLicense MITView source

What it does

This is the Lint skills workflow from the jezweb/claude-skills repository, a real project running GitHub Actions. It is shown here with attribution under its MIT license.

Below, Latchkey shows a faster, safer version produced by its optimization engine.

The workflow

workflow (.yml)

name: Lint skills

on:
  pull_request:
    paths:
      - 'plugins/**/skills/**/SKILL.md'
      - 'bin/skill-lint'

jobs:
  lint:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      - name: Detect changed skills
        id: changed
        run: |
          CHANGED=$(git diff --name-only ${{ github.event.pull_request.base.sha }} ${{ github.sha }} | grep 'SKILL.md' || true)
          if [ -z "$CHANGED" ]; then
            echo "No SKILL.md files changed"
            echo "skip=true" >> "$GITHUB_OUTPUT"
          else
            echo "Changed skills:"
            echo "$CHANGED"
            echo "skip=false" >> "$GITHUB_OUTPUT"
            # Convert to space-separated directory list
            DIRS=$(echo "$CHANGED" | xargs -I{} dirname {} | sort -u | tr '\n' ' ')
            echo "dirs=$DIRS" >> "$GITHUB_OUTPUT"
          fi

      - name: Run skill-lint
        if: steps.changed.outputs.skip != 'true'
        run: ./bin/skill-lint ${{ steps.changed.outputs.dirs }}

The same workflow, on Latchkey

Removes redundant runs and caps runaway jobs. Added and changed lines are highlighted.

name: Lint skills
 
on:
  pull_request:
    paths:
      - 'plugins/**/skills/**/SKILL.md'
      - 'bin/skill-lint'
 
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true
 
jobs:
  lint:
    timeout-minutes: 30
    runs-on: latchkey-small
    steps:
      - uses: actions/checkout@v4
 
      - name: Detect changed skills
        id: changed
        run: |
          CHANGED=$(git diff --name-only ${{ github.event.pull_request.base.sha }} ${{ github.sha }} | grep 'SKILL.md' || true)
          if [ -z "$CHANGED" ]; then
            echo "No SKILL.md files changed"
            echo "skip=true" >> "$GITHUB_OUTPUT"
          else
            echo "Changed skills:"
            echo "$CHANGED"
            echo "skip=false" >> "$GITHUB_OUTPUT"
            # Convert to space-separated directory list
            DIRS=$(echo "$CHANGED" | xargs -I{} dirname {} | sort -u | tr '\n' ' ')
            echo "dirs=$DIRS" >> "$GITHUB_OUTPUT"
          fi
 
      - name: Run skill-lint
        if: steps.changed.outputs.skip != 'true'
        run: ./bin/skill-lint ${{ steps.changed.outputs.dirs }}

What changed

Run on Latchkey managed runners with one line (runs-on), which apply the fixes below automatically and self-heal transient failures. This example uses latchkey-small; pick the runner size that fits the job.
Cancel superseded runs when a branch or PR gets a newer push.
Add a job timeout so a hung step cannot burn hours of runner time.

This workflow runs 1 job per trigger. On Latchkey the same minutes cost up to 58% less than GitHub-hosted, with zero queue time.

Actions used in this workflow

actions/checkout