CircleCI has a CLI, you can `circleci config validate` (or something like that) and it will check that what you wrote is valid YAML and that it's a valid Circle

CircleCI has a CLI, you can `circleci config validate` (or something like that) and it will check that what you wrote is valid YAML and that it's a valid CircleCI config (so syntaxical and semantic validation). Very useful, one of the many thing that make me prefer Circle over the other solutions I tried (Travis, Jenkins and a couple other I forget)