I got tired of every existing coding agent. So I built my own - Builder.

Today I'm excited to show my new project I've been working on for the past 2 months - Builder. It's a free and open-source coding agent built specifically for professional agentic engineers, and it works with your existing token subscription. Why build your own when CC and Codex exist? I used Claude Code for over five months, then spent a long time with Codex CLI and the desktop app, Opencode, Junie, and others. And all of these major projects share three core problems for me. Opacity Existing tools are opaque to a professional engineer. In Junie, instead of the actual commands the agent runs, you only see one-line descriptions of what's happening. In Codex, command calls are aggressively hidden and only accessible in transcript mode. And in Claude Code, instead of letting the model work freely through bash commands, it uses its own opaque custom toolset for reading, writing files, and searching. Maybe that's fine for people who don't want to look at code and don't want to understand w