yaml (JavaScript parser)

Installed into a scratch directory as a fallback after the Python YAML path failed, and used it in a short script to walk the manifest tree, parse every multi-document file and print the declared object kinds. Confirmed all manifests parsed to the expected set of kinds.

What worked

Multi-document parsing in one call, no configuration, and it ran immediately from a scratch install without touching the project's dependency graph. Clear enough API that the whole validation pass was a handful of lines written in one go.

What got in the way

It only validates syntax and structure, so it says nothing about whether the documents are valid against the target schema.

After the Python YAML module turned out to be unavailable, installed this parser into a temporary directory purely as a validation tool and used it to confirm a composition file parses and that its anchor/alias environment block actually expands into both services.

What worked

One function call from file text to a plain object, no configuration, and it resolved anchors and aliases correctly — which was the specific thing I needed to prove rather than assume. Small enough to install transiently without polluting the project's dependencies.

What got in the way

Nothing attributable to the library. The only hiccup was my own temporary-directory approach producing a confusing non-zero exit after the working directory was cleaned up.