Integration with AI SDK

[tconley1428]

What was changed

Added a new AiSDKPlugin to support running AI SDK in workflows. The plugin registers new activities for model invocation and optionally MCP tools. Workflows can then use temporalProvider to create models in workflows.

Why?

Checklist

1. Closes

2. How was this tested:
   Added a new test suite with local model coverage. AI_SDK_REMOTE_TESTS env variable is available to run against a real endpoint.

3. Any docs updates needed?

[mjameswh]

A few things:

• Prefer the function syntax rather than the const lambda form unless there's a reason for the later;
• Make a named type definition for McpClientFactory.
• Make the arg's type unknown rather than any.

Suggested change

	export const createActivities = (provider: ProviderV2, mcpClientFactory?: (_: any) => Promise<MCPClient>): object => {
	// In mcp.ts
	type McpClientFactory = (args: unknown) => Promise<MCPClient>;
	export function createActivities(provider: ProviderV2, mcpClientFactory?: McpClientFactory): object {

[mjameswh]

Should we not namespace those activities somehow, to avoid eventual conflicts with user defined activities, or those from other plugins? Could be something like e.g. __ai_temporal_invokeModel?

[tconley1428]

We didn't in Python, and it does come with the downside of being UI clutter since the name is shown there.

[mjameswh]

Is it the way you did this in Python? I mean, listTools being an activity call, which is call everytime tools() is called?

A few things that can be considered to make this more efficient:

• Cache tools after the first call
• Make listTools a local activity call instead of a regular activity;
• Extract the list of tools at bundle time and inject it as a static value into the workflow bundle (so no activity call needed to list tools).

[tconley1428]

It is one of the implementations we provided. Caching is a potential addition, but tools() is generally called once.

Extract the list of tools at bundle time and inject it as a static value into the workflow bundle (so no activity call needed to list tools).

I don't believe this is valid as the tool list is not known to be static.

[mjameswh]

See my previous comments.