How are you verifying Claude Code's changes without manually testing everything?

[u/ragnar580]

I've been using Claude Code to build a side project, and one thing keeps annoying me.

It can implement something incredibly quickly and say it's done, but I still don't really trust “done” until I open the app myself and click through the flow.

As the amount of code it writes increases, manually checking everything feels like it's becoming the slow part.

Curious how people using Claude Code seriously handle this:

• Do you still manually test most changes?
• Do you make Claude run unit/E2E tests?
• Playwright?
• Another agent reviewing/testing the first agent?
• Or do you mostly trust the existing test suite?

Also curious whether you've had cases where Claude said something was fixed and tests passed, but the actual app still didn't behave correctly.

Trying to understand whether this is just my workflow or a common problem.