coder/mux v0.16.1

on GitHub

GPT-5.3-Codex

We’re releasing this off-cycle to make GPT-5.3-Codex broadly available to users. Support is enabled via our new ChatGPT plan settings at Settings → Providers → OpenAI.

As of now, GPT-5.3-Codex ranks #3 on Terminal Bench with a strong showing on the Terminal Bench leaderboard.

Chat Sharing

You can now share a full transcript of your chat via an end-to-end encrypted link.
Right-click the workspace and select “Share transcript.”

Here’s a sample chat.

Misc.

This release includes several additional improvements:

• Workspace chats are now append-only on disk, preserving history prior to compaction.
• In this release, you can view up to one compaction back; full paging support is coming soon (including mux.md sharing).
• The SSH runtime now uses remote worktrees, making new workspaces and forks much faster.
• Skill load errors now appear directly in the workspace’s skill badge.
• mux run now supports sub-agents.
  • Invoke via bun x mux run or npx mux run.