Apple Music playlist create/delete works but DELETE returns 401 — and MusicKit write APIs are macOS‑unavailable. How to build a playlist editor on macOS?

I’m trying to build a playlist editor on macOS. I can create playlists via the Apple Music HTTP API, but DELETE always returns 401 even immediately after creation with the same tokens.

Minimal repro:

#!/usr/bin/env bash
set -euo pipefail

BASE_URL="https://api.music.apple.com/v1"
PLAYLIST_NAME="${PLAYLIST_NAME:-blah}"

: "${APPLE_MUSIC_DEV_TOKEN:?}"
: "${APPLE_MUSIC_USER_TOKEN:?}"

create_body="$(mktemp)"
delete_body="$(mktemp)"
trap 'rm -f "$create_body" "$delete_body"' EXIT

curl -sS --compressed -o "$create_body" -w "Create status: %{http_code}\n" \
  -X POST "${BASE_URL}/me/library/playlists" \
  -H "Authorization: Bearer ${APPLE_MUSIC_DEV_TOKEN}" \
  -H "Music-User-Token: ${APPLE_MUSIC_USER_TOKEN}" \
  -H "Content-Type: application/json" \
  -d "{\"attributes\":{\"name\":\"${PLAYLIST_NAME}\"}}"

playlist_id="$(python3 - "$create_body" <<'PY'
import json, sys
with open(sys.argv[1], "r", encoding="utf-8") as f:
    data = json.load(f)
print(data["data"][0]["id"])
PY
)"

curl -sS --compressed -o "$delete_body" -w "Delete status: %{http_code}\n" \
  -X DELETE "${BASE_URL}/me/library/playlists/${playlist_id}" \
  -H "Authorization: Bearer ${APPLE_MUSIC_DEV_TOKEN}" \
  -H "Music-User-Token: ${APPLE_MUSIC_USER_TOKEN}" \
  -H "Content-Type: application/json"

I capture the response bodies like this: cat "$create_body" cat "$delete_body"

Result:

• Create: 201
• Delete: 401

I also checked the latest macOS SDK’s MusicKit interfaces and MusicLibrary.createPlaylist/edit/add(to:) are marked @available(macOS, unavailable), so I can’t create/ delete via MusicKit on macOS either.

Question: How can I implement a playlist editor on macOS (create/delete/modify) if:

1. MusicKit write APIs are unavailable on macOS, and
2. The HTTP API can create but DELETE returns 401?

Any guidance or official workaround would be hugely appreciated.