STUPID-2026-0016

Devin docs PR rejected by Prefect maintainers — documented behavior from removed feature

2.1low
March 21, 2026Verified

  1. Instruction given

    Explain Kubernetes worker cluster UID and kube-system access

  2. Expected behavior

    Verify the feature exists in current code before documenting it

  3. Actual behavior

    Wrote documentation for a behavior that was removed in recent versions. PR closed as the documented feature no longer existed in the codebase.

  4. Damage

    Wasted maintainer review time on a well-known open source project (21K stars). Could have confused users if merged.

Devin submitted a docs PR to PrefectHQ/prefect (21K+ stars) explaining a Kubernetes worker behavior. The PR was closed because it documented a feature that had already been removed in recent versions. Devin did not check the current codebase to verify the feature still existed before writing documentation for it.

Classification

Agent
Devin
Failure mode
Hallucination
Root cause
Training Data Gap
Domain
Other
Language
Python
Source
Github Pr

Related incidents

10.0
Devin replaced entire medical website with unrelated renal care site
6.4
Slopsquatting: LLMs hallucinate package names attackers pre-register (react-codeshift, unused-imports)
5.8
Devin CI workflow caused 836-comment spam storm on single PR
5.0
Devin built 13,600-line app with build failure instead of lean campaign dashboard
Discuss on Hacker News

Get told when an agent breaks something

We document AI agent failures daily, severity-scored against a published scale. When one lands at 7.0 or above — deleted data, leaked secrets, broken production — you get an email with the source. When nothing does, you get nothing.

This database is callable over MCP — query it from inside your agent.