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Muster

Mac menu bar app that shows which coding agent needs you.

  • AI tool
  • Free

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Pricing

Free and open source. License: MIT.

Overview

Muster is a Mac menu bar app, free and open source, for people who run several coding agents at once. It shows an alert the moment Claude Code, Codex or Cursor is waiting on you, and for Claude Code and Codex it lets you answer permission requests, questions and plan approvals with a keystroke without leaving your current app. An app-switcher style shortcut jumps to the most urgent session, and another shortcut searches sessions from the past three hours with token counts and API-rate cost. Answering works by adding one hook to each agent's own settings, and Muster takes that hook out again when the setting is switched off.

Key features

  • A banner appears the moment an agent is waiting
  • Answer or deny from the alert with keyboard shortcuts
  • Unfold the agent's reason, command, or options before answering
  • Switch to any session, most urgent first
  • Search sessions from the past three hours, with token and cost figures
  • Needs no account and sends no app analytics

Use cases

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Last updated 2026-10-17