Pi (experimental)

Happier can run Pi Coding Agent through the local pi CLI.

Install Pi

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

hstack providers install pi
pi --version

Or install manually:

npm install -g @mariozechner/pi-coding-agent
pi --version

Start Pi with Happier

happier pi

Local authentication in Happier

Pi does not currently expose a native interactive login flow through Happier provider settings.

Instead, Happier shows the machine-local auth state for Pi in:

• Settings → AI provider settings → Pi

Today that status is based on supported environment-backed credentials on the selected machine.

For the shared user guide, see Provider authentication.

Authentication (connected services)

Pi can reuse connected services profiles when spawned by Happier:

• openai-codex (subscription OAuth)
• openai (API key)
• claude-subscription (setup-token only) for Claude subscription auth (materialized as ANTHROPIC_OAUTH_TOKEN)
• anthropic for Anthropic API key auth (ANTHROPIC_API_KEY)

If multiple compatible profiles exist, Happier will let you pick one when starting a new session.

Important limitation:

• Pi does not currently accept Claude OAuth profiles from claude-subscription; use a Claude setup-token profile instead.

See: Connected services

Troubleshooting

If Pi is not detected:

1. Verify pi --version works.
2. Restart Happier.
3. Set HAPPIER_PI_PATH if your binary is not in PATH.