- Add plugins/viz-platform/ directory structure
- Create .claude-plugin/plugin.json with metadata
- Create .mcp.json pointing to viz-platform MCP server
- Create hooks/hooks.json with SessionStart hook
- Create symlink to mcp-servers/viz-platform
- Add plugin to marketplace.json
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>