Teaching Google Antigravity to Paint: A Stateful Image-Editing Skill Built on Gemini's Interactions API and MCP

Short summary

nb2lite-skill-agy wraps Google's gemini-3.1-flash-lite-image model in a FastMCP server and packages it as an Antigravity CLI skill, enabling stateful image generation and editing. The Interactions API preserves visual context across turns so you can say 'add a lantern' instead of re-prompting the entire scene. The server exposes four MCP tools (generate, edit, edit-local, and list) and handles interaction ID chaining, aspect ratio constraints, and thinking-level validation.

• •Google's NB2Lite model supports stateful image editing via the Interactions API, preserving visual context across turns
• •The project packages this as an MCP server plus an Antigravity CLI skill, enabling iterative image editing within coding agent sessions
• •MCP standardizes tool access so one server works with any MCP-capable client without per-client integration glue

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