What happened
The current Homebrew release of Gemini CLI exits before model execution when using an existing oauth-personal login:
reasonCode: UNSUPPORTED_CLIENT
reasonMessage: This client is no longer supported for Gemini Code Assist for individuals. To continue using Gemini, please migrate to the Antigravity suite of products
Some attempts then return rateLimitExceeded during _doSetupUser instead. The CLI cannot be used headlessly with the cached login.
Reproduction
Environment:
- Gemini CLI 0.46.0 (current Homebrew stable)
- macOS
security.auth.selectedType = oauth-personal- no
GEMINI_API_KEY, Vertex credential, or Cloud project environment variables
Command:
gemini --prompt "Reply only READY" --model pro --output-format text --approval-mode yolo --skip-trust
The process exits 1 before any model response.
Expected
The documented personal Google login works with the current CLI, including headless use when credentials are already cached, or the CLI provides a supported non-destructive migration/reauthentication instruction that keeps the CLI usable.
Impact
This blocks a versioned cross-driver steering evaluation from collecting required live Gemini evidence. The harness correctly fails fast and does not treat the provider failure as a passing or quota-skipped trial. Offline transport tests cannot substitute for the required live model run.
What happened
The current Homebrew release of Gemini CLI exits before model execution when using an existing
oauth-personallogin:Some attempts then return
rateLimitExceededduring_doSetupUserinstead. The CLI cannot be used headlessly with the cached login.Reproduction
Environment:
security.auth.selectedType = oauth-personalGEMINI_API_KEY, Vertex credential, or Cloud project environment variablesCommand:
gemini --prompt "Reply only READY" --model pro --output-format text --approval-mode yolo --skip-trustThe process exits 1 before any model response.
Expected
The documented personal Google login works with the current CLI, including headless use when credentials are already cached, or the CLI provides a supported non-destructive migration/reauthentication instruction that keeps the CLI usable.
Impact
This blocks a versioned cross-driver steering evaluation from collecting required live Gemini evidence. The harness correctly fails fast and does not treat the provider failure as a passing or quota-skipped trial. Offline transport tests cannot substitute for the required live model run.