Claude Code Plugin /verify: Automated Browser Testing from Your Plan

If you've ever watched Claude Code confidently report "done, all requirements implemented" and then found a missing button or skipped form step, you're not alone. A Reddit user built /verify — an open-source (MIT) plugin for Claude Code that automates browser-based acceptance testing from your plan file, not your code.

Why a Plan, Not Code?

The key insight: Claude doesn't always follow the plan. Static review tools like CodeRabbit catch syntax and style issues, but they won't catch that a button is missing or a form step was skipped. /verify opens a real browser and literally clicks through the requirements.

Installation

/plugin marketplace add opslane/verify
/plugin install opslane-verify@opslane-verify-marketplace

Setup (One-Time)

Run /verify-setup. It auto-detects your dev server port from package.json and .env* files, indexes your routes, and creates a .verify/ folder in your project.

Usage

/verify path/to/plan.md

This runs the plan against your app. Under the hood, it uses the Playwright MCP to drive a real browser. Once verification finishes, it opens report.html in a browser with a pass/fail breakdown per check, complete with screenshots. A machine-readable verdicts.json is also generated.

Repo: github.com/opslane/opslane

It's very early-stage, so the author is looking for feedback.