At a glance: Google introduces Gemini Spark as an agent service, replaces the open-source Gemini CLI with Antigravity CLI, and secures Spark through isolated VMs and DLP gateways.
At I/O 2026, Google presents Gemini Spark as a personal AI agent with native integration to Gmail, Calendar, Drive, and other Google services. At the same time, the open-source Gemini CLI is being replaced by the closed Antigravity CLI.
Gemini Spark functions as a user-optimized agent based on Gemini 3.5 Flash and the Antigravity platform. Antigravity itself exists as a desktop app, CLI tool (written in Go), Python SDK (open source as a wrapper around a binary Go component), and VS Code fork. Gemini Spark integrates natively with Gmail, Calendar, Drive, Docs, Sheets, Slides, YouTube, and Google Maps.
For enterprises, Google promotes Gemini Spark with isolated execution environment on Google Cloud: each task runs in a new, strictly segregated ephemeral VM. All data traffic is routed through an Agent Gateway with Data Loss Prevention (DLP) policies, user credentials remain encrypted and are never directly exposed to the agent. This is intended to prevent sensitive data from colliding between sessions.
An open security risk remains prompt injection vulnerability. When users process sensitive information through Gemini Spark, security depends on the robustness of these safeguards — a point practitioners should verify before production use.
As of June 18, 2026, the previous open-source Gemini CLI (Apache 2.0 license, TypeScript) will no longer work with Google AI subscriptions. It is being replaced by the new closed-source Antigravity CLI. Users who rely on the CLI must migrate to this solution.
Source: ainews-dev.lumi-systems.io · Published May 20, 2026
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