First public release of the premortem skill for Claude Code.
A structured premortem session — finds in 10–15 minutes the holes in a concrete plan, launch, hire, or decision that would otherwise show up only after the failure.
What's inside
- Four-phase session: pre-flight context sync → silent multi-agent scan (3 parallel helpers, 6 angles) → live dialog with strategic options per hole → atomic persist with history snapshots
- Built-in: outside view (Kahneman & Lovallo 2003), bias scan with 6 items from the Kahneman/Lovallo/Sibony HBR 2011 checklist, conditional reverse-premortem (Klein 2025)
- Persistent history: re-run after a month, see which holes closed / got worse / are new
- 104 tests covering the deterministic CLI mechanics
Install
git clone https://github.com/AndyShaman/premortem.git
cd premortem
./install.shSee README.md for full docs.