Auto-detect auth mode from base URL: - openrouter.ai, api.openai.com → Bearer token - api.riotpiao.com → apikey header - localhost → no auth Explicit override via with_auth_mode()
Auto-detect auth mode from base URL: - openrouter.ai, api.openai.com → Bearer token - api.riotpiao.com → apikey header - localhost → no auth Explicit override via with_auth_mode()