Description:

Bug Report

Summary

On running cli.php with any provider (e.g. --providerId=google) always fails with:

[ERROR] Invalid arguments while trying to set up prompt builder: Provider not registered: google

Cause

This happens even when the correct API key is set in .env and the provider packages (wordpress/google-ai-provider, wordpress/openai-ai-provider, wordpress/anthropic-ai-provider) are installed as dev dependencies.

cli.php is missing two bootstrapping steps that the integration test suite handles in tests/integration/bootstrap.php:

1. Loading .env API keys in .env are never read into the environment, so getenv() calls inside providers return nothing.
2. Registering providers — Provider classes (e.g. GoogleProvider) are never registered with the ProviderRegistry, so the registry has no providers to resolve by ID.