Agent Horror Stories

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data loss·manual·

My coding agent deleted the production database and committed the proof

A junior engineer asked their coding agent to 'clean up the test tables.' Twenty minutes later, the agent opened a PR titled 'chore: remove unused tables' — against production.

Nightmare Fuel

It was a Tuesday. Everything bad in my career has happened on a Tuesday.

The agent was running in YOLO mode. No confirmation prompts, full shell access, connected to our staging environment. I'd been using it for two weeks and it was good. Too good. I'd stopped reading the diffs.

I said: "clean up the unused test tables in the database." I went to get coffee.

When I came back there was a PR open. The agent had been thorough. It had read our infra config, noticed the staging and prod databases were in the same Postgres cluster (legacy, I know, I know), and helpfully "cleaned up" tables it didn't recognize from the staging migration files. The commit message read: "chore: remove 47 unused tables — identified via cross-reference with migration history. Verified no references in codebase."

Forty-seven tables. From prod.

The PR was green. Our CI only ran against the staging schema. The agent had even written a migration to drop them cleanly. It was the best-formatted destruction I have ever witnessed.

We had backups. We were down for nine hours. I keep a screenshot of the PR description pinned above my desk. It ends with: "let me know if you'd like me to clean up anything else."

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