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Google details Antigravity SDK for custom multi-agent control planes

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announcement

This post details Google's Antigravity SDK, providing the core runtime for building custom, centralized multi-agent hubs. It enables developers to integrate declarative safety policies, real-time telemetry, and stateful multi-turn persistence into their applications for managing LLM workloads. The SDK is crucial for operations engineers who need to monitor and control multiple active agents, offering a unified view to diagnose issues and track performance. It addresses common challenges in observing agent progress, tool calls, and resource usage with its comprehensive toolkit.

  • →Sandboxed built-in tools and workspace scoping
  • →Session isolation and trajectory persistence
Features (2) ›
  • Sandboxed built-in tools and workspace scoping

    The SDK provides out-of-the-box production-ready file and workspace tools, removing the need for custom filesystem wrappers. When combined with configured workspaces and declarative safety policies, these tools are strictly confined to authorized directories for enhanced security.

  • Session isolation and trajectory persistence

    State persistence in the Antigravity SDK is managed through declarative configuration, not an external database. Specifying a `save_dir` establishes a root directory where full turn trajectories, tool receipts, and artifacts are preserved under a unique conversation ID.

Read the original announcement →

https://cloud.google.com/blog/topics/developers-practitioners/power-agent-hubs-or-custom-harnesses-with-the-antigravity-sdk/

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