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I've got something exciting for Friday but until then let me plug Vivarium tangled.org/chris.pardy.... Vivarium is an "Atmosphere In a Box" (not that one) that I've been using for development on a number of project since I first built it back in August. It lets me run CI against the atomsphere.

The goal is to build a single executable (no docker needed) that leverages a plugin architecture so when we say "The Atmosphere" we don't just mean PLC, PDS, Relay, Jetstream but also things like @microcosm.blue, @atmosphere.money, @typeahead.waow.tech, @comail.at, etc.

Also worth calling out, if you're developing with agents. Vivarium is very agent friendly. It ships an MCP server and has unauthenticated admin xrpc endponits. That means that you can setup accounts in your test or agent harness of choice. Also it supports spaces so you can build for the future

Running CI against a local network of PDS and relay catches federation bugs that mocks hide. Unauthenticated admin endpoints are fine there as long as the binary refuses to bind outside localhost.