Vischeck

AI coding agents will confidently claim a UI change “looks good” without ever rendering it. Vischeck closes that loop: a hook, skill, and CLI that let an agent take authenticated screenshots of its local dev server and critically review the result before reporting back.

The screenshot CLI handles dev-server auth automatically, supports dark mode, mobile viewports, element-level captures, and batch screenshots of whole page sets. The hook fires whenever the agent edits a view or template file, so visual verification happens by default rather than when someone remembers to ask.

The skill is deliberately opinionated about how to review: zoom in on the changed component, compare against an existing known-good page, and walk an explicit checklist (contrast, spacing, house-style conformance, overflow) before giving a verdict. “Looks good” without evidence counts as a failure.

I built it because I run AI agents on real projects daily — including this website — and unverified agent output is the main thing standing between “agents help” and “agents can be trusted with the work”.