Blinkdiff checks every app screen on every pull request

Why it surfaced

Blinkdiff turns a short YAML journey into a CI check: it launches an installed build, walks through taps and text entry on a simulator, captures checkpoints, and comments on the pull request with baseline, current, and diff screenshots. Intended changes can be approved with a `/blinkdiff approve` comment.

A visual testing tool for native and React Native iOS and macOS apps that drives declared flows, compares screenshots with repository baselines, and reports changes in GitHub.