In May they replaced the Gemini CLI with the Antigravity CLI.

https://developers.googleblog.com/an-important-update-transi...

That was sunset and replaced by Antigravity. FWIW until I abandoned it knowing the sunsetting, I was able to get good behavior out of Gemini CLI with overriding the system prompt. The default prompt crippled the harness with very poor instructions, but there was a hidden ENV to override it. Replacing it with Claude Code like prompts based on the model selected, it ran at a much higher intelligence level full stack with significantly less errors.

There is no Gemini CLI anymore, nor you can use Gemini with your own harness unless you pay per-token.

Honestly, it's platform dependent and "OK" at best, "Mediocre" at worst (Agy on Windows).

Gemini is great via the Chat interface and decent via Github Copilot.

I honestly hate it via Antigravity CLI because their sandboxing system frankly doesn't work. Every other harness has mastered "don't ask me if you're working in this one directory and using common commands". Agy instead either tries to pull a global elevation or wants every tedious variation of a command string whitelisted. Madness - circa 2023.

Agy _really_ needs to make the out-of-the-box experience cleaner and hassle-free. Heck, even Grok CLI "just works".

This may reflect a global mind-shift from "approve and validate everything" to "just do the stuff and only ask permission if it's outside the folder or a command that actually requires elevation". Maybe that's not for everyone, but for those that do want to perform unattended agentic work -- Agy is painful.

It was superseded by the antigravity CLI.

it is antigravity now. It is ok