How do I test AI-generated code on a pull request?

Add a pull_request GitHub Action that validates the diff. Static analysis and unit tests help but miss user-visible regressions. An autonomous agent like DevAssure O2 reads the PR, generates behavioural E2E tests, runs them in a browser, and posts a check — without you authoring Playwright specs.

Why does asking Cursor to write tests not fix vibe-coded PRs?

The coding agent and the test author share the same assumptions. Tests often assert what the model intended, not what the running app does. PR-level testing needs an independent agent that evaluates the change cold, like a user would.

Is this different from CodeRabbit or AI code review?

Yes. Review tools analyse source. A testing agent exercises the deployed or preview app — catching broken checkout flows, wrong totals, and missing validation that never appear as obvious diff comments.

Does DevAssure O2 work with Cursor and GitHub together?

Yes. Install the Invisible (QA) Agent from Open VSX in Cursor for pre-push feedback, then add devassure-ai/devassure-action@v1 on pull_request. Same O2 agent in the IDE and CI.

What preview URL does O2 need for a vibe-coded PR?

A reachable staging or Vercel preview URL for that PR branch — the same URL you would manually click through. O2 drives the app in a browser; it does not merge code without a running environment.

2 posts tagged with "Vibe Coding"

Why Your Vibe-Coded PR Keeps Breaking Production in 2026 (And How to Catch It Before Merge)

Divya Manohar

Co-Founder and CEO, DevAssure

Short answer

Vibe-coded PRs break production because speed outruns validation: the diff looks fine in review, but behaviour regresses. Fix it at the pull request with an agent that tests the running app on each PR — not with more AI-written unit tests or line-by-line review alone.

You merged on Friday. Checkout looked fine in the diff. By Monday, support tickets say promo codes stop applying after a failed payment retry.

The PR was 400 lines, mostly written by Cursor in an afternoon. Two approvals. Green CI — because unit tests passed and nobody had an E2E check for that path.

The Vibe Coding Quality Gap: Why AI-Generated Code Needs a Testing Agent, Not More Tests

Divya Manohar

Co-Founder and CEO, DevAssure

TL;DR

Vibe coding ships features in minutes - but AI-generated code has 1.7× more production issues than hand-written code, and asking the same AI to write tests repeats the same blind spots. The fix is not more tests; it is an independent testing agent that reads each PR cold. DevAssure O2 validates vibe-coded diffs at PR speed with zero scripts to maintain.

Last week I watched a developer build an entire payment integration in 35 minutes using Cursor.

User authentication. Stripe checkout. Webhook handling. Invoice generation. All wired up and functional.

In 2023, that is a week-long sprint. In 2026, it is a Tuesday morning before standup.

Then we ran DevAssure's O2 Agent on the PR.

Focus on the merge gate? Read the companion: Why your vibe-coded PR keeps breaking production — the handoff from coding agent to CI, not the quality-gap theory.