Summary

The current description of MSWEA_MODEL_API_KEY in "Setting API keys" section from /models/quickstart/ page could be clarified.

"If you only use a single model, you can also set MSWEA_MODEL_API_KEY (as environment variable or in the config file). This takes precedence over all other keys."

Gaps:

1. "Takes precedence over all other keys", actually Anthropic models where ANTHROPIC_API_KEY andANTHROPIC_API_KEYS take priority.
2. "If you only use a single model". MSWEA_MODEL_API_KEY actually works with roulette and alternating modes too.

Updating to:

"You can also set MSWEA_MODEL_API_KEY as a universal API key that works with any model configuration (single model, roulette and alternating). "

makes docs clearer between code.