is

new Config("gcp").Require("project")

a reasonable way to grab the project id out of config when needed? Are there downsides to this approach?

Generally speaking, provider config should be available through the ‘config’ module of any given provider, e.g.

Gcp.Config.Project

should be “just there”, so you can always use that as a shorthand. There’s also nothing wrong w/ your approach of explicitly reading from the config itself.

that's super helpful, thank you!