Now available as a repo: https://github.com/thinkjones/gascity-cookbook
A worked example of a multi-city, multi-provider Gas City setup: one config monorepo that runs several "cities" (agent deployments), each on a different model provider, sharing one reusable pack of config.
The trick that makes it maintainable is a tier abstraction: your agents and workflows
only ever refer to abstract tiers — fast, solid, deep — and each city binds those