One AI editor was 1.1 GB installed and 3 GB in data

The new agent editors are VS Code descendants or Electron apps with an AI agent built in. The installed app is large, but the data they build up afterwards is larger, and none of it is visible in /Applications.

Where Devin's 3 GB went

Cache, logs, cached data and crash dumps came to 1.35 GB here, all safe to remove and all rebuilt only as needed. The logs alone were larger than many whole apps.

Check yours

for d in Devin Kiro Antigravity Cursor Windsurf Code; do
  p="$HOME/Library/Application Support/$d"
  [ -d "$p" ] && du -sh "$p"/* 2>/dev/null | sort -h | tail -6
done

A cleanup that keeps your setup

# Quit the app first
cd ~/Library/Application\ Support/Devin
rm -rf Cache CachedData Crashpad logs

Leave User and anything named globalStorage or workspaceStorage: they are your settings and per-project state. Stuck update downloads are covered in ShipIt folders, and why these apps are big to begin with in Electron apps taking up space. The terminal agents are in AI coding tools taking up space.