I just built my own coding harness, just like Claude Code. (100% open-source)
A harness is the code wrapped around an LLM. The model only decides the next step, and the harness handles everything else, planning, tools, memory, and safety.
In simple words model acts as the brain and the harness provides the hands.
A coding harness is that same wrapper pointed at a codebase. It turns a plain text generator into something that reads files, edits code, runs tests, and fixes real bugs.
Here's everything that went into mine:
- the core agent loop
- file tools that double as external memory
- planning for long-running tasks
- subagents that work in their own context
- sandboxed execution in a throwaway VM
- human-in-the-loop approval
- persistent memory and checkpointing
The whole thing is built on CrewAI, a 100% open-source framework.
I also wrote an article on this. It covers everything that goes into building a coding harness, the agent loop, planning, subagents, sandboxing, memory, and checkpointing, built step by step.
The article is quoted below.
OpenDesign Motion udah rilis, open source
Alternatif open source buat Claude Motion. Bikin motion video pakai agent dan model apa aja, gak wajib Opus 5.5.
Video launch ini juga dibikin full di OpenDesign.
https://t.co/Jip2xdyNXP
Bakal lo pakai buat bikin konten apa? 👇🏻
#Claude Code ile yeni projem üzerine çalışıyorum. Opus 5.5 çalışıyorum. Skia ile 2D tasarımları yapıyoruz. Oyun akışı ve bölüm tasarımları Claude ilenortak yapıyoruz.
Oyunu #iOS için tasarlıyorum. Bakalım nasıl olacak. İlk ön görüler iyi olacak gibi. Yine ilerledikçe paylaşırım.
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THIS IS F**KING GOLD
475 VIDEO DEMOS BUILT WITH CLAUDE OPUS 5.5 IN ONE GITHUB REPO
Motion graphics, explainers, 3D scenes, and even games, all made with HTML, Canvas, SVG, and Three.js.
The crazy part? Every demo comes with its original prompt and source post, so you can pick any one and try recreating it yourself.
475 examples to learn from and experiment with.
Repo in the comments 👇🏻
We've been keeping something under wraps.
A new project. A different experience. And a lot more than meets the eye.
OneUI 9.5 Widgets.
A few people will get to experience it first.
Should we open the doors? 👀
17 skills para redes sociales en claude!
100% GRATIS y open source.
✓ aprende tu voz con 3-5 textos tuyos
✓ 6 hooks por post
✓ 24-40 ideas de contenido de golpe
✓ carruseles, infografías y miniaturas de youtube
✓ guiones de reels
te dejo el link de la repo por aquí 🙇🏻♂️
→ https://t.co/8QCzeLYlgv