[Feature]: Add AntiGravity support to Hermes model before Gemini CLI deprecation

[w0l4i]

Problem or Use Case

Description

Please add AntiGravity support to the Hermes model. With the upcoming deprecation/shutdown of the Gemini CLI scheduled for June 18, we urgently need this integration to ensure we can successfully log in and maintain uninterrupted usage via the AntiGravity CLI ecosystem.

Proposed Solution

Expected Behavior

• Users should be able to authenticate and log in using the Hermes model via AntiGravity.
• Full compatibility with the existing AntiGravity CLI workflows to replace the expiring Gemini CLI functionality.

Alternatives Considered

Additional Context

The Gemini CLI is going down on June 18, making this integration a high priority for users who rely on these models for daily production/workflows. Early implementation or a pre-release version before the deadline would be highly appreciated.

Feature Type

CLI improvement

Scope

Small (single file, < 50 lines)

Contribution

• I'd like to implement this myself and submit a PR

Debug Report (optional)

[teknium1]

Fixed by #50454 (merged) — #50454

Hermes now ships a native google-antigravity OAuth provider. After Google's June 18 sunset of the consumer Code Assist endpoint, the google-gemini-cli provider stopped working for free / Google One / AI Pro tiers; the new provider authenticates through Antigravity's OAuth client + scopes against the same Code Assist backend, restoring subscription-backed Gemini access.

Select it via hermes model → "Google Antigravity (OAuth)" (aliases: antigravity, antigravity-oauth, agy). It works without the agy CLI installed — the public Antigravity desktop OAuth client is baked in as a fallback. google-gemini-cli is left in place for Enterprise Code Assist users, who were unaffected by the consumer sunset.

Credit to @pmos69 (#29474) for the native provider implementation.