Bring Your Own Key
Shelley uses exe.dev's built-in LLM Gateway by default, but you can use your own API keys instead. When creating a new conversation, bring up the models menu by choosing "Add / Remove Models..." in the models drop-down.
The workflow for common providers like Anthropic, OpenAI, and Gemini is
straight-forward. If you have a z.ai coding subscription (as opposed to the
per-token endpoint), use the coding endpoint
https://api.z.ai/api/coding/paas/v4.