Test AI-generated code before it reaches your users
When an agent writes the code, a second agent should check it before it hits main. BugBrain explores what Cursor, Copilot, or Claude Code just built, gates the pull request, and runs right from your editor over MCP, so AI-generated code gets tested the way a human diff would.
- AI writes more code than any human can review line by line.
- AI-generated code fails in different places than hand-written code, and old QA habits miss them.
- Merging fast feels productive until a generated diff quietly breaks a flow.
A second agent to check the first
Coding agents ship diffs faster than review can keep up, and the failure modes are new: plausible-looking code that breaks an untested path, a changed API contract, a flow that no longer works end to end. The fix is not more manual review, it is an agent whose whole job is to test what the coding agent produced.
How BugBrain tests AI-generated code
BugBrain reads the pull request, works out which user-facing areas the diff touches, and explores those flows on the preview deploy like a real user. It posts an advisory GitHub check with the bugs it found and the evidence to reproduce them. And with the MCP server installed, you can kick off a run and read the results without leaving Cursor, Copilot, or Claude Code.
What you get
- Diff-aware exploration of the flows a change touches
- A pre-merge GitHub check that gates introduced regressions
- Run QA from your AI editor over MCP (npx -y @bugbrain/mcp)
- Verified bugs with evidence, not a wall of scanner noise
Frequently asked questions
How do you test AI-generated code?
Treat the diff like any risky change: explore the flows it touches on a preview deploy, gate the pull request on introduced regressions, and verify findings with evidence. BugBrain automates that pass so a coding agent’s output is checked before it merges.
Does it work with Cursor, Copilot, and Claude Code?
Yes. Install the BugBrain MCP server with npx -y @bugbrain/mcp and you can start runs and read issues from inside those editors. The pull-request gate works through a GitHub check.
Does this replace code review?
No. It complements review by testing behavior. Review reads the code; BugBrain checks that the running app still works after the change.
See it on your own app
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