Linters
actionlint
A linter for GitHub Actions workflow files that catches syntax and expression errors.
Problem it solves
Why it exists.
It catches workflow failures before they reach a runner.
Optimized for
Where it shines.
Repositories using GitHub Actions with pull-request validation.
Use with care
Where not to use it.
Do not rely on syntax checks alone for secrets, permissions, or deployment safety.
Components
What it is made of.
- YAML parser
- Expression checks
- Shell checks
- Workflow rules
Process
How it works.
- Workflow YAML is parsed
- Expressions and job structure are checked
- Shell snippets are inspected
- Findings are reported in CI