Yep, actionlint is great! I've used it successfully both to lint my own workflows, and to lint third-party workflows for (basic) security issues.
Unfortunately, it can't lint actions themselves, only workflows that call actions[1]. This is a substantial deficiency, especially for users (like me) who write and maintain a decent number of actions.
Unfortunately, it can't lint actions themselves, only workflows that call actions[1]. This is a substantial deficiency, especially for users (like me) who write and maintain a decent number of actions.
[1]: https://github.com/rhysd/actionlint/issues/46