Originally published on andrew.ooo — visit the original for any updates, code snippets that aged out, or follow-up posts.
TL;DR
Rmux is a from-scratch Rust rewrite of the terminal multiplexer idea, built specifically for the agentic era. It hit Show HN on May 21, 2026, posted by author shideneyu with the tagline "A programmable terminal multiplexer with a Playwright-style SDK" — and the framing landed. The pitch in one sentence: drop-in tmux compatibility (90 commands, your keybindings work), plus a typed async Rust SDK on the same daemon so agents and scripts can drive any CLI or TUI app the way Playwright drives a browser.
Key facts:
v0.2.0 released May 18, 2026 (3 days before Show HN), MIT/Apache-2.0 dual-licensed
