Codeship doesn't support YAML confguration file, does it? I can't find any document about it on their Docs page.
I try to put some file like codeship.yml or your_config.yml in my repo but it doesn't work.
P/S: I know that CircleCI, TravisCI and others support YAML file, i.e circle.yml and .travis.yml.
Codeship doesn't (yet) support configuration via a YAML file. The next iteration of our platform will have this feature, in the meantime you'd need to extract your commands in shell script and call that script via the UI.