Branch By Abstraction

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" summary

Branch By Abstraction is a concrete technique for trunk‑based development: introduce an abstraction + toggle, implement both old and new implementations in the mainline, keep every commit build‑green, add unit tests for each implementation, and flip the toggle when the new path is fully tested. It lets long, multi‑release migrations (message format and bus changes at a bank; a C++→Java rewrite at an airline) be pausable and resumable, avoids noisy merges from long‑lived branches, and permits safe removal of the old code after a successful rollout.

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" chapters (12)

1. 0:00Start
2. 3:28Trunk Based Development facilitates lots reca
3. 5:10Bad Branching Models /2 (recap)
4. 10:35Big to change thing - our intenton
5. 11:39Big to change thing - our fear
6. 12:41Big to change thing - our nightmare
7. 14:47Reminder of the nightmare
8. 15:40Idealized life on the trunk
9. 17:53The big change in trunk alongside regular work
10. 18:56Branch by Abstraction - first commits
11. 20:43What other devs see at the start
12. 21:49Part way through, for the dev doing the BbA we

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