Parallel Code, Emdash, and Superset: Three New Tools Let You Run Claude Code, Codex, and Gemini CLI Side-by-Side in Isolated Git Worktrees

GitHub·low signal

A category of parallel AI coding tools has emerged: Parallel Code (MIT, keyboard-first, QR-code phone monitoring, 5 agents on 5 features simultaneously), Emdash (YC W26, provider-agnostic, local or SSH remote), and Superset (macOS, supports Claude Code/Codex/Gemini/Cursor Agent). All isolate each agent in its own git worktree with independent branches and working directories. The pattern — dispatch, review diffs, merge wins, toss failures — represents the maturation of multi-agent coding workflows beyond manual orchestration.