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The Output tab streams Mux’s backend logs in real time — useful for diagnosing tool failures, MCP server issues, or unexpected behavior.

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Opening the Output tab

Open the command palette with Ctrl+Shift+P (⌘+Shift+P on macOS). Type > to switch to command mode, then run Show Output. This opens the Output tab in the right sidebar. You can also press F4 to open the command palette directly in command mode (prefilled with >), then run Show Output. To close it, open command mode again (> or F4) and run Hide Output.

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Filtering by level

A dropdown at the top of the Output tab filters logs by minimum severity: debug, info, warn, or error. The default is info. Your selection is persisted across sessions.

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Clearing logs

The trash icon clears all log entries — both in the UI and on disk. This is useful when you want a clean slate before reproducing an issue.

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Opening the raw log file

The Open Log File command (also in the command palette) opens the underlying log file in your system’s default viewer. Useful when you need to search, copy, or share the full log output.