Why? We needed it.

Why really? The agent that wrote your code is the worst judge of it.

What? Every coding-agent CLI (Claude Code, Codex, Gemini, Qwen, Vibe) reads your diff so you don't have to (you weren't going to). Read-only, in parallel; you stay in your agent, it makes the call.

How? One tiny script that installs, updates, and runs all the agents for you, on Windows, macOS, and Linux. No setup, no server, no MCP.

SETUP

Paste this into Claude Code, Codex, or your coding agent of choice:

Create a "/postmortemthis" skill to review whatever we are working on. To do this we'll use https://github.com/Softeria/postmortemthis/releases/latest/download/postmortemthis.cmd, which runs one prompt across several coding agents at once. Run it as `echo "..." | sh postmortemthis.cmd`.

Then, before the real postmortem, run /postmortemthis.