I've been working on my own private harness for the past 8 months, and I've been collecting ideas from such repos I've stumbled upon.

I've been working on my own private harness for the past 8 months, and I've been collecting ideas from such repos I've stumbled upon. pi-tmux is one such example (seems to be archived now) which inspired me to use tmux as communication layer and provide visibility of subagents of multiple models in their native harnesses [1]. There's also herdr, which is not 0-stars, but is super interesting but lesser known project [2]. This also has interesting substrates to allow agent coordination. None of these are harnesses per se, but they're pointing towards clear gaps in existing harnesses. For example, we've known for a while now that compounding knowledge of different class of models achieves better performance. Why is there no harness where this is a native functionality? And there's no harness where subagents are first class citizens both in terms of capabilities and UX. [1] https://github.com/offline-ant/pi-tmux [2] https://github.com/ogulcancelik/herdr

Posted by gck1 on Jul 1, 2026, 8:47 PM

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• ux (Software)

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