adb install -r doesn't kill your app, so your screenshot is a lie
Reinstalling over a running app can leave the old composition on screen. A screenshot taken without a force-stop cannot say which build drew it.
testing
29 posts
An agent that installs the app and looks at the screen
The capture loop that makes an on-device claim checkable: force-stop, install, launch, capture, hash. Why the order is load-bearing and what it cannot see.
A verification step that can pass while the bug is present is not a verification step
Static checks read what was written; the defect lives in what was drawn. Four artifacts that passed every gate this session and failed the moment someone looked.
An agent that checks the page itself
Giving an agent a real browser removes the slowest loop in web debugging. The first thing that breaks is not your selectors — it is that a headless browser is refused at the edge.
A test that cannot fail is not a test. Mine passed twice.
A RED test fixture that passed because a comment explaining the omission contained the omitted string. The failure mode is generic: any test whose input mentions what it removes.