About Johannes Millan

I build Parallel Code, the open-source desktop workspace for running AI coding agents in parallel with git-worktree isolation. I also write the guides and product comparisons published on this site.

My work focuses on practical developer tooling: isolating agent changes, keeping generated code reviewable, and helping developers use Claude Code, Codex CLI, Gemini CLI, Copilot CLI, Antigravity CLI, and related tools without giving up their existing editor or git workflow.

Parallel Code is developed in public. You can inspect the implementation, release history, issue tracker, and contributions in the GitHub repository, or view my GitHub profile.

Editorial approach

Comparisons on this site are written by the person building Parallel Code, so they include a clear disclosure. Volatile product claims are checked against public vendor documentation and accompanied by the sources and verification date used for the comparison.