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Developer's co-founder submits untested 5,000-line AI-generated PR

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GoKawiil Brief

A software developer recounts that their business partner used an AI coding assistant to build an entire payments backend module in a single day, then submitted a 5,236-line pull request without testing it. The developer found the endpoints didn't actually work and that documentation was riddled with obvious AI-generated filler, while missing critical details like where to obtain API keys.

Why It Matters

GoKawiil's interpretation of the reporting above, not reported fact.

The incident highlights a growing risk in software teams as AI coding tools speed up output but can create a false sense of completeness, encouraging developers to skip verification steps like running and testing code. It's a cautionary tale about over-reliance on AI assistants eroding basic engineering discipline and collaboration between technical co-founders.

Key Takeaways
Worth a Look

The Pragmatic Programmer: 20th Anniversary Edition — When a 5,000-line untested PR lands in your review queue, this classic is the gift that keeps on giving. Hunt and Thomas cover testing discipline, honest documentation, and taking responsibility for the code you ship "vibe-coded" or not. A great desk copy for any team hashing out how AI-assisted work gets reviewed.

See The Pragmatic Programmer: 20th Anniversary Edition on Amazon → Affiliate link — we may earn a commission on purchases, at no extra cost to you. Product picked by AI based on this article; it is not a tested recommendation.

Source: ycj.bearblog.dev, 2026-09-08

Published there as: “My business partner sent a 5K vibe-coded PR that he didn't even test”

Read the original report → The summary and analysis above are GoKawiil's own, written from reporting by the source above. Facts and quotes belong to the original publisher.