head to head · open source
ux-ui-agent-skills vs openharness
ux-ui-agent-skills has 1,481 GitHub stars, 157 forks, 6 open issues and last shipped 12 days ago. openharness has 993 stars, 83 forks, 40 open issues and last shipped today. ux-ui-agent-skills leads on adoption by 49% (1,481 vs 993 stars). ux-ui-agent-skills is written in JavaScript under MIT; openharness is written in C under MIT. ux-ui-agent-skills has attracted 11% as many forks as stars, openharness 8%. openharness was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 2 topic tags (ai-agents, claude-code), so they are genuine substitutes rather than adjacent tools.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| ux-ui-agent-skills | openharness | |
|---|---|---|
| GitHub stars | ★ 1.5K | ★ 993 |
| License | MIT | MIT |
| Written in | JavaScript | C |
| Last push | 2026-09-16 | 2026-09-28 |
| Forks | ⑂ 157 | ⑂ 83 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick ux-ui-agent-skills if
- You weight community size — 1.5K stars and counting
- You want the MIT license terms
- Your stack matches JavaScript
- You value the larger contributor base for long-term maintenance
pick openharness if
- You want the openharness feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches C
- You evaluated both and openharness fits your workflow better
About ux-ui-agent-skills
ux ui agent skills is an MIT licensed kit of structured instructions, design tokens, runnable skills and 138 brand grade design systems that turns Claude into a senior design architect, aimed at product engineers, design system maintainers and design to code teams who need accessible, token driven interface output generated inside their own project.
read the full ux-ui-agent-skills overview →
About openharness
OpenHarness is MIT licensed open source software and hardware, written in C, that gives people who build with coding agents one place to run those agents alongside domain tools and live viewers for work beyond software — CAD parts, circuit boards, data analysis, and video.
read the full openharness overview →
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Frequently asked questions
Is ux-ui-agent-skills or openharness more popular?
ux-ui-agent-skills has 1,481 GitHub stars and openharness has 993. ux-ui-agent-skills has the larger community by that measure.
Are ux-ui-agent-skills and openharness free?
Both are open source. ux-ui-agent-skills is licensed under MIT and openharness under MIT. Neither carries a licence fee.
What is the difference between ux-ui-agent-skills and openharness?
ux-ui-agent-skills is written in JavaScript and openharness in C. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, ux-ui-agent-skills or openharness?
Choose ux-ui-agent-skills if you want the larger community (1,481 stars) or its MIT licence terms. Choose openharness if its feature set, stack or MIT licence fits better. Both are self-hostable.