I thought I saw somewhere you could add a path filter in pants.toml for a custom python resolve instead of adding resolve= to BUILD files. Is that possible/are there docs? Maybe I'm misremembering...

I'm not entirely sure I understand what you're asking for. But if you want some part of your repo to use a particular resolve, you can provide a default value for the

resolve=

field on all targets using

__defaults__

. https://www.pantsbuild.org/2.20/docs/using-pants/key-concepts/targets-and-build-files#field-default-values

__defaults__(all=dict(resolve="my-resolve"))

Not what I was thinking but that's equally as helpful