What I look for in an oncall handoff

I used to add a layer of abstraction the first time I saw a pattern repeat. Now I wait for the third. The waiting is uncomfortable, but the abstractions that survive that wait tend to last.

I trust monorepos more in the second year than I did in the first. Most of the early friction goes away once the tooling catches up.

There's a kind of premature optimization that comes from imagining a future team. "What if someone needs to swap this out?" Often, no one does.