harnext Desktop
Download harnext
for the desktop.
The full harness as a desktop app — run agents in isolated worktrees, tune the evaluator loop, and preview your work live. Free and open source.
First launch on an unsigned build
The apps aren't code-signed yet, so the OS will warn the first time. Once past it, they open normally.
- macOS — if Gatekeeper blocks it, right-click the app → Open, then confirm. Or run
xattr -dr com.apple.quarantine /Applications/harnext.app. - Windows — SmartScreen may appear: click More info → Run anyway.
- Linux — make the AppImage executable:
chmod +x harnext-desktop-*.AppImage, then run it.