Open-source vibe-testing MCP server diffs browser test runs for AI coding agents
AishwaryShrivastava · reddit · 2026-10-16
A developer released vibe-testing (MIT), an open-source MCP server born from the pain that an agent saying 'done' isn't proof a route, form or signed-in flow still works.
- Scans a web app's source for routes and controls, runs Playwright browser checks, and produces an HTML report with screenshots, request evidence and per-route pass/fail/change summaries
- The killer feature is the second run: after a code change it flags routes that regressed or recovered, so you inspect the specific flow instead of a wall of green
- Zero LLM calls inside the tool — your editor agent picks scenarios while the local runner records what happened
- Also usable via CLI; install with npx vibe-testing@latest init
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