DurableAgent providers, avoiding deps, syntax ideas

[lawsonoates]

I recently opened a PR to add openrouter support as a provider. Wrapping each provider with 'use step' individually with the added deps seems unnecessary.

Idea: Integrate directly into DurableAgent

Add the 'use step' function to DurableAgent implementation with the provider as an arg. The resulting syntax would look like:

import { openrouter } from '@openrouter/ai-sdk-provider';

const agent = new DurableAgent({
  model: openrouter('anthropic/claude-haiku-4.5'),
  ...
});

Lmk your thoughts!

I am fairly new to the codebase so if there is a feature coming up where each provider needs own config or I overlooked something lmk :)