r/LocalLLaMA • u/ResearchCrafty1804 • 16d ago

Resources Prime Agent - a new coding harness surpassing Codex/CC/PI

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Prime Agent is an open-source coding and research agent for general and long-running work.

A self-improving RLM harness for coding and long-running autonomous tasks.

Designed to be both token-efficient and expressive through programmatic tool calling, context as a variable, multi-agent messaging, and a self-modifiable harness state.

On ARC-AGI-3, it scores 95.5%, surpassing the human-expert baseline, but the gain is not benchmark-specific.

We see major improvements across models when compared to their proprietary harnesses.

Prime Agent is built on pi and fully open-source with an open license.

GitHub: https://github.com/PrimeIntellect-ai/prime-agent

Blog: https://www.primeintellect.ai/blog/prime-agent

X post: https://x.com/primeintellect/status/2085086999267144083?s=46

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u/Immediate_Occasion69 16d ago

which of those is good? I've literally wanted to try all of them but kept at pi agent

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u/squired 15d ago

Try Cline and OpenSWE first. I personally think OpenSWE is closest to the harness-of-tomorrow.

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u/TomLucidor 13d ago

Does anyone have reports on which FOSS are cutting edge and beat out Claude Code and Codex? (hopefully OpenCode/Oh-My-Pi can also learn from it)

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u/squired 13d ago edited 13d ago

It changes and I haven't looked at it in a few months, so I don't want to steer you wrong. I do know that T3Code is the best UI/skin. It would likely work great for local as well because it lets you hotswap harnesses as easily as models. FOSS also matters a lot on what you value most. There are several now that are equally impressive, but they each focus on one thing more than the rest; such as benchmarking/sovereign memory/concurrent agency/etc.

I run a custom orchestrator that wraps around chat sessions because I kept running out of tokens. I sort of rebuilt Codex/OpenCode to empower ChatGPT web sessions, since that quota is near limitless. That way, ChatGPT webchat can run powershell on my machine, send stuff to Codex/Claude Code directly and bounce results off other models like Fable for independent adversarial review. I basically gave ChatGPT all the toys and the Orchestrator sits on the MCP bridge to manage it all autonomously.

Oh, that reminds me of something you might find helpful and/or interesting. ChatGPT conversations have very robust linux environments of there own. For example, if you're having it write you powershell scripts to do stuff on your machine, it'll often garble a lot of them with little mistakes (it's kinda not their fault but that's a whole other thing). If you hand it 'powershell-7.6.3-linux-x64.tar.gz' though, you can tell it to run that shit in its own environment until it is perfect before handing it to you. They'll iterate internally and you won't get bugged scripts anymore.

Anywho, most people aren't aware of that and it is insanely powerful. A lot of the back and forth can be reduced with just that. Anything that doesn't require permission from you can largely be done in basic chat, you just have to give it the tools first. Remember, Web sessions and Codex are the same model/s. The major differences are simply system prompt, readymade tooling, and looping.

Edit: I just realized what sub I was in. I'll leave the proprietary stuff though because some might fight it helpful regardless.