enabledPlugins in settings.json does not activate Desktop 'Anpassen' skills in VS Code slash commands

Summary

Skills shown in Claude Desktop "Anpassen" panel (cloud-based) and plugins from the local marketplace folder (~/.claude/plugins/marketplaces/) appear to be two separate systems that don't synchronize.

Steps to reproduce

1. Open Claude Desktop → Anpassen → Skills
2. Enable a skill via toggle (e.g. "web-artifacts-builder")
3. Check settings.json → not updated automatically
4. Manually add to settings.json: "web-artifacts-builder@claude-plugins-official": true
5. Open VS Code → type "/" → skill does NOT appear

Expected behavior

Skills enabled in the "Anpassen" panel should sync to settings.json AND appear in VS Code slash commands.

Actual behavior

• Toggle in "Anpassen" has no effect on settings.json
• Manually adding to settings.json only works if the skill exists locally in ~/.claude/plugins/marketplaces/claude-plugins-official/plugins/
• Skills visible in Desktop "Anpassen" that are NOT in the local folder (e.g. web-artifacts-builder) cannot be activated for VS Code at all

Environment

• OS: Windows 11
• Claude Desktop + Claude Code VS Code Extension