Swap the model

model on createAgent and createAgentHandler is a provider config or any AI SDK LanguageModel:

model: { provider: 'openai-compatible', baseUrl: 'https://openrouter.ai/api/v1', apiKey, model: 'z-ai/glm-5.3-flash' }
model: { provider: 'anthropic', model: 'claude-sonnet-5' }        // ANTHROPIC_API_KEY
model: { provider: 'ollama', model: 'qwen3:8b' }                   // localhost:11434
model: { provider: 'zerosignal', model: 'qwen3:8b' }               // zs-proxy on localhost:8080, no key

Nothing in the package reads the environment; the web agent’s route maps its env vars onto this option in one place. Example: examples/agent-http.ts.