The Core of a Coding Agent Is 128 Lines of Python. So I Built One From Scratch.

📰 Dev.to · Osama Ghazal

An AI engineer rebuilds the core of a coding agent (Claude Code / Cursor) from nothing — the loop, tools, permissions, and context — in ~1,300 lines of Python. Here's the whole loop, and what's actually under the hood.

Published 21 Jun 2026

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An AI engineer rebuilds the core of a coding agent (Claude Code / Cursor) from nothing — the loop, tools, permissions, and context — in ~1,300 lines of Python. Here's the whole loop, and what's actually under the hood.
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