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validate-workflow

@mvillmow/ProjectOdyssey
8
0

Validate GitHub Actions workflow files for syntax, best practices, and correctness. Use before committing workflow changes or when workflows fail.

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SKILL.md

name validate-workflow
description Validate GitHub Actions workflow files for syntax, best practices, and correctness. Use before committing workflow changes or when workflows fail.
mcp_fallback none
category ci

CI Workflow Validation Skill

Validate GitHub Actions workflow files for correctness.

When to Use

  • Creating new workflow
  • Modifying existing workflow
  • Workflow syntax errors
  • Before committing workflow changes

Quick Reference

# List workflows
gh workflow list

# View workflow details
gh workflow view <workflow-name>

# Validate YAML
yamllint .github/workflows/*.yml

# Lint with actionlint
actionlint .github/workflows/*.yml

Validation Methods

1. GitHub CLI

# View workflow
gh workflow view deploy.yml

# List all workflows
gh workflow list

# Get workflow metadata
gh api repos/owner/repo/actions/workflows

2. actionlint

pip install actionlint
actionlint .github/workflows/*.yml

3. yamllint

yamllint .github/workflows/*.yml

Common Issues

Issue Example Fix
Syntax error on: [push pull_request] Add comma: on: [push, pull_request]
Invalid action version uses: actions/checkout@v99 Use valid version: @v4
Missing required field Job missing runs-on Add runs-on: ubuntu-latest
Invalid context ${{ job.status }} in wrong place Move to correct context

Workflow Checklist

  • Valid YAML syntax
  • on trigger configured correctly
  • All jobs have runs-on
  • All steps have run or uses
  • Action versions are specific (not @main)
  • All secrets/vars available
  • Timeouts set appropriately
  • Permissions configured correctly

Best Practices

name: Quality Check
on: [push, pull_request]

jobs:
  quality:
    runs-on: ubuntu-latest
    timeout-minutes: 10
    permissions:
      contents: read
    steps:
      - uses: actions/checkout@v4      # Specific version
      - uses: actions/cache@v3
        with:
          path: ~/.cache/pip
          key: ${{ runner.os }}-pip

      - run: just pre-commit-all

Validation Workflow

# 1. Edit workflow
vim .github/workflows/test.yml

# 2. Validate YAML
yamllint .github/workflows/test.yml

# 3. Lint with actionlint
actionlint .github/workflows/test.yml

# 4. Review in GitHub
gh workflow view test.yml

# 5. Commit if valid
git add .github/workflows/test.yml
git commit -m "ci: update workflow"

Error Handling

Error Fix
"Invalid YAML" Fix YAML syntax errors
"Unknown action" Check action name and version
"Missing field" Add required fields (run, uses, etc.)
"Invalid context" Use correct context expression syntax

Configuration Files

  • .pre-commit-config.yaml - Pre-commit hooks
  • .github/workflows/ - Workflow definitions
  • actionlint config - Action linting rules

References