Antigravity agent 09-2026 changes built-in tools, 05-2026 shuts down October 5

Google released antigravity-preview-09-2026, replacing antigravity-preview-05-2026. Tool parameters move to PascalCase and file edits use line-range replacements. The 05-2026 version shuts down on October 5, 2026.

Who is affected:

Apps that run the Antigravity agent with local tools or that parse its function_call steps.

Action needed:

Update the agent string and adapt any code that handles the built-in tool calls.