Test local web apps and fix errors in one session
Claude Code with Claude in Chrome writes code, opens localhost, clicks through the UI, reads console errors and fixes them without the developer touching the browser.
Done withClaude CodeClaude in Chrome
- What they did
- The Claude in Chrome extension is connected to Claude Code with `claude --chrome` or `/chrome`. It shares the developer's real Chrome session, including logins, and new domains need approval once. Asked to add a dashboard table filter, Claude wrote the component, opened the page and tried the filter. It spotted that the URL query params weren't updating, fixed the router logic, and confirmed the fix with a reload.
- How it went
- The filter example took three iterations with no browser work from the developers. The setup is limited to a developer's own workstation: it needs a visible Chrome window, so no CI or headless runs, and it works in Chrome and Edge only.
- Worth knowing
- Browser interaction uses a lot of tokens, about 7.7% of context per interaction. The authors call API pricing a money pit and say a Max subscription is needed for heavy use.
Try it yourself with Claude Code
Start my app locally with [start command], then open it in Chrome at [localhost URL] and click through [feature or flow]. Read the browser console and network errors, find the cause in the code, and fix it. Repeat until the flow works with no console errors. Then summarize what you changed. Don't commit or push anything without asking me.
2 more accounts of this
Source: test-lab.ai · Undated
Five of these in your inbox every morning
The best things people got an AI agent to do, each with the prompt to try it.
More like this
Turn tickets into merged pull requests
Pulls tasks from GitHub Issues or Linear, then runs Claude Code or Codex in isolated Kubernetes pods to carry each one through to a PR.
Draft a tax filing from bank statements with Claude Code
A roundup of user reports, including one who had Claude Code draft a tax filing from bank statements and invoices, and another who organized 1,400 screenshots.
Migrate a SaaS from AWS to DigitalOcean
A developer used Claude Code as a pair programmer for provisioning, database seeding, SSL, DNS cutover and production debugging, finishing in about four hours with zero downtime by his account.
- Claude
Build a C compiler with a team of parallel agents
Anthropic's engineering write-up on tasking Opus 4.6 agent teams with building a C compiler.
Build and test a simple endpoint project with Devin
A reviewer had Devin set up a project, write code, install dependencies, test endpoints and add error handling in about 4 minutes on a simple task.
Build a booking and payment app for tattoo artists
A former programmer used Replit Agent over a weekend to build a booking app with calendar, Google OAuth, Stripe deposits and notifications, though time zones and UI needed back-and-forth.