Documentation & guides
Set up Critter, find answers, and explore ways to review your interface work.
Documentation
Set up Critter in your project
Install Critter to browse HTML prototypes, Vite apps, and static Next.js pages across Git commits, then compare UI versions in your browser.
Supported projects and limitations
Check Critter compatibility with HTML prototypes, Vite, static Next.js exports, multiple projects, environment variables, and historical UI snapshots.
Design iteration with a coding agent
Use Critter with your existing coding agent to review Git commits, bookmark the versions worth keeping, and compare grouped UI alternatives.
Troubleshoot Critter setup and previews
Diagnose HTML paths and assets, dev server and framework build failures, environment variables, highlights, viewer reuse, and applying design alternatives in Critter.
Workflow guides
Compare UI versions from Git commits
Use Critter to open earlier versions of your interface, compare two Git commits side by side, and inspect changes in the browser.
Explore design alternatives with coding agents
Keep different UI directions available with Git branches and worktrees, Critter's included agent skill, and grouped browser comparisons.
Get back a feature your agent dropped
A Solar Commons walkthrough showing how Critter finds the version where a feature still worked, shows exactly what changed, and keeps alternative UI directions side by side.