[Bug] minimax-music-gen requires retired mmx music commands

Summary

The minimax-music-gen skill currently instructs agents to run mmx music generate, but current mmx-cli releases no longer expose any music resource. As a result, a fresh installation of the official skill and its documented prerequisite cannot generate music.

Reproduction

npx skills add minimax-ai/skills@minimax-music-gen -y
npm install -g mmx-cli

mmx --version
# mmx 1.0.24

mmx music generate \
  --instrumental \
  --prompt "Instrumental R&B background music" \
  --quiet --non-interactive --dry-run

Actual result:

{
  "error": {
    "code": 2,
    "message": "Unknown command: mmx music generate Instrumental R&B background music",
    "hint": "mmx --help"
  }
}

mmx --help lists text, speech, image, video, search, vision, quota, config, file, etc., but not music. The same absence is present in [email protected].

Root cause / upstream context

Music support was intentionally removed from the CLI and SDK in MiniMax-AI/cli#239 because the corresponding Music APIs were being sunset:

• https://github.com/MiniMax-AI/cli/pull/239
• Removal commit: https://github.com/MiniMax-AI/cli/commit/1b53953ebff127fc980b088f995661aac2c844db

The last npm CLI release that still exposes mmx music generate appears to be [email protected]. However, pinning that old CLI does not seem like a safe long-term workaround because it targets APIs that upstream explicitly says are being sunset.

The skill still documents mmx music generate, mmx music cover, music-2.6-free, and music-cover-free, so its current workflow conflicts with the supported CLI surface.

Expected behavior

A freshly installed official skill should either:

1. use a currently supported MiniMax music-generation API/tool, or
2. clearly mark the skill as unavailable/retired and stop instructing agents to install mmx-cli and invoke removed commands.

Suggested fix

• If a replacement MiniMax music endpoint/tool exists, migrate the skill to it and add a tested version/compatibility check.
• Otherwise, deprecate/archive minimax-music-gen (and any dependent playlist/buddy music skills) so agents do not route music requests to a guaranteed Unknown command failure.
• Avoid recommending [email protected] unless the retired endpoints are explicitly confirmed to remain supported.

Environment

• minimax-ai/skills main branch, skills/minimax-music-gen/SKILL.md
• [email protected] (npm latest during reproduction)
• Also checked [email protected]: no music resource
• Node.js 24, Windows 11