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This is for internal use by the PaaS team. Public-facing documentation is located at


We produce lots of YAML. This sets out some guidelines for how this should be formatted.

In general, follow the same formatting style as examples in the YAML spec.



Lists should be indented 2 spaces beyond the parent key. For example:

  - one
  - two
  - three

It’s worth noting that the YAML spec differs from the style that concourse generated when returning pipelines. We’ve therefore had to pick one, and have chosen to stick with the YAML spec. This is also the indentation pattern that seems to be more commonly implemented by editors.