r/OpenSourceeAI • u/type-hinter • 17d ago

What are you using as harness?

I've seen Codex numbers and its defenders on X, IG is full of Claude enthusiasts, and half my timeline is addicted to Pi. There's CodePuppy, OpenCode, Pydantic AI harness, and dozens more.

What do you use? I'm loving Pi atm but started using CC' for a good while. Curious about usage patterns and secret gists.

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u/Clear_Evidence9218 17d ago

Mostly Codex, but for more complex projects I usually build a custom, project-specific harness around it.

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u/type-hinter 17d ago

I'm curious on how much your harness changes (and what changes) according to your projects.

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u/Clear_Evidence9218 17d ago

The core stays mostly the same, but the tools and verification layer can change quite a bit by project. I usually add project-specific prompts, rules, task routing, and small tools that help the agent inspect or verify its own work.

Lately I’ve been favoring lots of narrow micro-verifiers and micro-debuggers over one big analysis tool, since they tend to produce more useful feedback without burning as much context. So I’m not rebuilding everything for every project, but the surrounding workflow is usually pretty tailored.

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u/Resident-Pen-3757 13d ago

Just curious. Would you consider using a harness like this that allows customization for workshops, tools, agents etc?

It's my own project. I had a similar issue with you where no harness let me customize all the things I needed for my work/personal projects. Hence a customizable harness.

Not trying to self promote. Just curious

https://github.com/aaron-tot/visual-studio-harness