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
The macOS build is signed and notarized — it opens normally. The Windows and Linux builds aren't code-signed yet, so the OS may warn the first time. Once past it, they open normally.
- Windows — SmartScreen may appear: click More info → Run anyway.
- Linux — make the AppImage executable:
chmod +x harnext-desktop-*.AppImage, then run it.