Name the whole default
Record the model, agent, instructions, skills, tools, permissions and checks as one versioned setup, like backend-tools@18. When something regresses six months later, you can see which version produced which results.
You already version CI config, toolchains and dev environments. The coding agent setup every team shares changes just as often, usually without a version number or a test. Fullbeam gives each version a name and a benchmark.
Every result links back to the setup, the tasks and the commit it came from. If something wasn't measured, you see that too, instead of a number that looks complete.
Record the model, agent, instructions, skills, tools, permissions and checks as one versioned setup, like backend-tools@18. When something regresses six months later, you can see which version produced which results.
Run the current default and the new one on tasks from the repos they'll affect. Same starting commit, same tests, same rules for what counts as a pass.
Routine maintenance and database migrations may need different setups. Your standard can include several, each with a clear list of the work it covers, instead of one choice forced on every repo and team.
When an agent change goes wrong and someone merges the fix, that PR can become a task. The next default has to pass it before another team gets it.
Fullbeam tells you which kinds of work should move to the new version. GitOps, MDM or your internal platform still deploys it.