I've used JSON schema a fair bit for config files for provisioning infrastructure and its been great. For example I have a kubernetes clusters JSON file cleanly

I've used JSON schema a fair bit for config files for provisioning infrastructure and its been great. For example I have a kubernetes clusters JSON file cleanly schematized which specs all the clusters I need (node pools, metadata etc), which I generate TS types from using 'json-schema-to-typescript', and then just iterate over these in pulumi. All I need to do is update the JSON file to update my infra, and the coding experience is brilliant with pretty much complete type safety.