17 posts tagged with "CI/CD"

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.

For a decade, the testing industry rallied behind a simple mantra: shift left.

Find bugs earlier. Test sooner. Put quality in the hands of developers.

The theory was sound. A bug caught in development costs roughly 10× less than one found in production. Move testing to the left of the timeline, and you save money, ship faster, and improve quality.

But here is what actually happened:

Every team that adopted vibe coding eventually hits the same wall: code ships faster, but validation does not keep up. This post is the implementation manual for closing that gap on every pull request.

Cursor changed the default for how features get built. What has not changed is that untested code still breaks production — it just gets there faster.

For twenty years, automated testing meant writing more code. That era is ending — and most teams haven't noticed yet.

The first automated test I ever wrote was in Playwright. It was 2012. It launched a browser, filled in a login form, and checked that the dashboard loaded. It passed. I felt like a wizard.

More than a decade later, the fundamental contract hasn't changed. To test software, you write more software. You describe, in code, what your code is supposed to do. Then you maintain that second codebase forever.

We've built entire careers, conferences, certifications, and consultancies on this premise. Selenium. Cypress. Playwright. Test pyramids. BDD. Page object models. The whole apparatus rests on a single assumption: humans must specify, in writing, what to test.

That assumption is quietly dying.