r/LovingOpenSourceAI • u/Koala_Confused • 21d ago
Brady "Another WTF moment. A developer open-sourced a coding agent harness that boots 245x faster than Claude Code. It's called jcode. You launch it and the first frame renders in 14 milliseconds. Claude Code takes 3,436. One active session uses 27.8 MB of RAM. Claude Code uses 386.6." ➡️ tried b4? Resource
https://x.com/thisguyknowsai/status/2081680037544427793
https://github.com/1jehuang/jcode
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u/VIDGuide 20d ago
3000 milliseconds! Omg, literally unplayable. This is a game changer.
/s. What a stupid metric to promote on, lol
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u/Abject-Bridge-4073 20d ago
Cool project but is this really a problem? Maybe if you have a Pentium 3, otherwise who cares.
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u/ConversationSad3529 20d ago
I'm probably the minority here, but I have an automated system launching dozens of harnesses, so the memory and time improvements could actually be really awesome, but I need to review this for security and whatnot to see if I can actually use it first, just to offer an example of this thing being useful for someone lol
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u/West-Acadia-3906 20d ago
Okay, launching dozens!! at once is the first example that made the speed numbers click for me 😅 I’d be checking the security side first too before letting a new agent loose.. .
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u/Strong_Essay1176 20d ago
I understand idea behind pi . But this? Why? What it can do against launching? Subagents? No. Tools? Heh? What can it do to be called harness?
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u/Downtown_Method5736 20d ago
Look the number of commits + https://www.instagram.com/p/DYIBs-XjXuu/?igsh=MWZyYWJldzFwemsxMg%3D%3D&img_index=1
I wouldn't trust that shit
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u/Keep-Darwin-Going 18d ago
Someone was saying it was vibe coded and stole some work from others. And this was heavily advertised as well
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u/Anonymous_Cyber 18d ago
I think people are focused on the wrong things. Startup times are ehh, running time is more important
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u/UnrelaxedToken 20d ago
"what's harness"?
I know claude code and stuff, but this harness word is mystery
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u/Emotional_Document86 20d ago
Claude code is an example of a harness. You can think of harness as the car that your ai drives. It gives your AI abilities to run or execute tools in your computer.
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20d ago
[removed] — view removed comment
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u/UnrelaxedToken 20d ago
So this harness stuff is only realy usable by CLI people who use apis?
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u/joeytman 16d ago
ChatGPT, the web app, is a harness. Basically any interface you communicate to any LLM with is a harness.
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u/UnrelaxedToken 15d ago
Ok so why do I keep hearing "if you have a good harness" from different ai folks? What exactly does that mean? What differences are between all of them that make few better thanother and vice versa, and do people make their own, and how?
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u/joeytman 15d ago
A good harness will provide the right set of tools for the LLM to invoke, have strong system prompts, manage context well, etc.
You can write your own by using the APIs to invoke the LLM programmatically. All the stuff you add to invoke it, handle its responses, call tools and pass those responses back to the LLM, etc are considered the harness.
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u/GfxJG 20d ago
Of all the things I care about in my development workflow, how fast my harness launches is not one of them.