Imports, converts, and optimizes external agent skills (written for Claude Code, Cursor, or generic LLMs) into native Google Antigravity plugins and skills. Translates legacy tool references, adapts subagents to Antigravity's parallel invoke_subagent arrays, and bundles plugin manifests. Use when the user asks to "import skill", "convert skill", "port skill", "optimize skill for antigravity", or provides a GitHub URL to a Claude Code skill.