Harness engineering: a self-evolving feature loop in 312 lines of bash
The article describes a self-evolving automation system called harness-loop, built in 312 lines of bash, that manages AI-driven feature development by looping Claude code generation with feedback and failure handling. It emphasizes the importance of a robust 'harness' to guide AI models toward reliable outcomes by managing context, progress tracking, and halting conditions. The system uses the filesystem as state storage, relies on iterative learning, and includes safeguards to prevent infinite loops and quota exhaustion.
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try { if(localStorage) { let currentUser = localStorage.getItem('current_user'); if (currentUser) { currentUser = JSON.parse(currentUser); if (currentUser.id === 3890666) { document.getElementById('article-show-container').classList.add('current-user-is-article-author'); } } } } catch (e) { console.error(e); } Tufail Khan Posted on Apr 30 • Originally published at tufail.dev Harness engineering: a self-evolving feature loop in 312 lines of bash #claudecode #bash #aicoding #agents Repo: github.com/tufailkhan45/harness-loop — one bash script, drop into any spec-driven repo. Originally published on: tufail.dev/blog/harness-engineering-self-evolving-loop Most posts about Claude Code talk about prompts.
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