Google is replacing Gemini CLI with Antigravity CLI, a Go-based multi-agent terminal tool; free and Pro/Ultra users must migrate by June 18, 2026.
Key Takeaways
Antigravity CLI is built in Go for faster execution and supports asynchronous multi-agent workflows without blocking the terminal session.
It shares a unified agent harness with the Antigravity 2.0 desktop app, so core agent improvements propagate to both surfaces automatically.
Core Gemini CLI features carry over as Antigravity equivalents: Agent Skills, Hooks, Subagents, and Extensions become Antigravity plugins.
Enterprise users on Code Assist Standard/Enterprise or Google Cloud licenses keep existing access unchanged; the June 18 cutoff applies only to individual, free, Pro, and Ultra users.
Gemini Code Assist for GitHub also loses new installs on June 18, with request serving ending shortly after.
Hacker News Comment Review
The open-source-to-closed-source regression is the sharpest technical objection: Gemini CLI was Apache 2 licensed with an active repo; the Antigravity CLI repo currently holds only a README and a demo GIF, with open-sourcing described as only a possibility.
Binary inspection by one commenter surfaced undocumented internals including a Chrome DevTools Protocol/Playwright client, macOS Seatbelt sandbox, Sentry crash reporting, Unleash feature flags, and a SKILL.md convention mirroring Anthropic’s approach.
Early adopters report geo-blocking and account eligibility errors blocking signup, and one hands-on user hit a sandbox misconfiguration where network access was granted but DNS via mdnsresponder was broken.
Notable Comments
@simonw: Confirms Gemini CLI was Apache 2 open source; Antigravity CLI repo has no code yet, only a README and animated gif.
@mccoyb: Binary reverse engineering reveals CDP/Playwright client, Seatbelt sandbox with Node/v8 specifics, Sentry, Unleash, and a SKILL.md system.
