Google Antigravity CLI v1.1.5 adds an /effort command to adjust reasoning effort on the fly, letting you balance latency against answer depth. The redesigned model picker now groups models by base variant and shows effort badges in the status line. The settings panel is now scrollable for easier navigation. SDK v0.1.8 switches to Gemini 3.6 Flash as the default model and adds custom subagent instructions support. Pydantic argument coercion now happens automatically for tool calls, with configurable retry logic and improved local agent stability.