you only think until you have to extract some information from it. "Here is a dir full of CI job definitions, find all the ones which require extra permissions"

you only think until you have to extract some information from it. "Here is a dir full of CI job definitions, find all the ones which require extra permissions" - trivial in yaml or json or toml, could be hard to impossible for Python/nodejs. or "I am doing ci job frontend, for each job I need to get a list of inputs it takes and their description, but without doing full code checkout" - good luck doing this if your jobs are in python/nodejs. (to be fair, there are programming languages that are also severely limited and can be evaluated mostly safely, like Starlark, but I don't think they'd match your definition)