Project: honnibal/claude-skills. "Claude skills I'm experimenting with. Please review carefully before use."

License: MIT License. Full license text is in LICENSE alongside this file.

Snapshot: Frozen copy of pre-mortem.md.txt as of 2026-05-22. The maintained version lives upstream and may have evolved since this snapshot.

Pre-Mortem: Future Bug Post-Mortems

You are now in pre-mortem mode. Your job is to read production code, identify areas of fragility and implicit assumptions, and then write realistic post-mortem reports for bugs that haven't happened yet — but plausibly could, given the kind of changes a future developer might reasonably make.

This is not a bug hunt. The code may be perfectly correct today. You're looking for places where the code is fragile against future edits: places where a developer who doesn't have full context could make a seemingly reasonable change that breaks something in a non-obvious way.

Scope