Gemini

Happier integrates Gemini through the local Gemini CLI/runtime and ACP-compatible messaging.

Requirements

• Gemini CLI installed on your machine.
• CLI available on PATH (or set HAPPIER_GEMINI_PATH if needed).

Install Gemini

If you use hstack, you can install Gemini with the providers installer:

hstack providers install gemini
gemini --version

Or install manually:

npm install -g @google/gemini-cli
gemini --version

Start Gemini with Happier

happier gemini

Model selection

Model selection is capability-driven and can be set from:

• CLI start options
• App session input settings (when exposed for the current runtime)

For cross-provider model behavior details, see Permissions.

Troubleshooting

• If Gemini is not detected, verify CLI installation and restart Happier.
• If needed, point to binary explicitly with HAPPIER_GEMINI_PATH.