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[FEATURE] Support /desktop session handoff on Windows ARM64 #83437

Description

@rlandry-lang

Feature request

Support the /desktop (alias /app) CLI-to-desktop session handoff on Windows ARM64.

Current behavior

On Windows 11 ARM64 (Snapdragon X2 Elite), Claude Code CLI 2.1.220, typing /desktop returns:

Unknown command: /desktop

The commands reference (https://code.claude.com/docs/en/commands.md) documents the command as: "Continue the current session in the Claude Code Desktop app. Requires macOS or x64 Windows and a Claude subscription. Alias: /app" — so ARM64 Windows appears intentionally excluded.

Why this matters

  • The Claude Desktop app itself already ships a Windows ARM64 installer, so the handoff target exists on this platform; only the CLI command is missing.
  • Windows-on-ARM hardware (Snapdragon X Elite / X2 Elite laptops) is an actively growing user base.

Environment

  • Claude Code CLI: 2.1.220 (npm, current at time of filing)
  • OS: Windows 11 Home 10.0.28000, ARM64 (Snapdragon X2 Elite - X2E88100)
  • Claude Desktop app: installed (ARM64 build)
  • Git for Windows: 2.54.0 (arm64 build)

Expected behavior

/desktop transfers the current CLI session to the installed ARM64 Claude Desktop app, as it does on macOS and x64 Windows.

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