Updated handoff playbook: README, env, twelve-minute video
README, env sample, twelve-minute Loom. Boring on purpose.
A client engineer cloned the repo, ran compose, and the twin actually opened. We wrote the checklist down so we wouldn’t forget what worked: README in a known place, env template committed, CI green, and a twelve-minute video for cold start plus the two ways it usually breaks.
If we can’t hit that bar, we don’t get to call the sprint “done.” Sounds uptight; saves an incredible amount of Slack archaeology.