Google Antigravity gets a first-party AG-UI integration for file, shell, subagent and approval workflows
On November 3, CopilotKit formally announced `ag-ui-antigravity`. The adapter maps Antigravity text, reasoning, tool, and subagent steps into AG-UI events so CopilotKit, Slack, Teams, and other AG-UI frontends can stream the work with A2UI, frontend tools, shared state, attachments, and human approval. The accompanying Repo Doctor shows an end-to-end path for fixing CI, rendering diffs and test results, and pausing risky steps.
Why it matters
The integration connects a stateful agent runtime with real file and shell authority to a visible, approvable product surface. It shows AG-UI becoming a governance boundary between agent computers and host applications, while also making clear that streaming visibility and approval cards are only part of the control plane: workspace isolation, duplicate calls, session recovery, and side effects remain shared adapter and host responsibilities.
A closer look
Antigravity runs a Go localharness subprocess, while the Python adapter connects over WebSocket and translates steps into AG-UI 1.0 events. Sessions share harness processes. A human-interrupted turn can span several AG-UI runs, so the adapter preserves the iterator, event translator, and frontend-tool results to avoid retranslating and re-executing the same call after resume. The official 0.2.1 package reports 315 unit tests and 19 live Gemini checks on September 30 against google-antigravity 0.1.9: 15 passed and four were cut short by free-tier 429 or Gemini 503 errors. The November announcement marks first-party integration, documentation, Dojo, and OpenBot/Repo Doctor productization; adapter 0.2.1 had already shipped on October 6.
Who this is for
Platform, security, and product engineering teams bringing coding agents, agent computers, CI repair, or long-running workflows into web, Slack, Teams, and generative UI surfaces.
Original sources
- CopilotKit launch posts, official adapter package, cookbook and Google Antigravity SDK ↗www.copilotkit.ai
- Repo Doctor cookbook ↗docs.copilotkit.ai
- Google Antigravity SDK repository ↗github.com
- ag_ui_antigravity 0.2.1 package and verification status ↗pypi.org
- CopilotKit launch overview and OpenBot/Repo Doctor ↗www.copilotkit.ai
Revisions & corrections (1)
— Merge the November 3 launch posts, package verification record, cookbook and official SDK source into one dated first-party AG-UI integration event while preserving the adapter's earlier October release date.