Make ServiceType can be extended without modify package/core

[fibonacci998]

Is your feature request related to a problem? Please describe.

Currently, when someone want to create a new service, they must add new type as string to enum ServiceType in packages/core/src/types.

Describe the solution you'd like

I want to add new service type in my new plugin without modify enum ServiceType in package core. In some case they import packages/cores from node-modules, so they can not edit that enum

Describe alternatives you've considered

May be remove that enum, so that getService function in packages/core/src/runtime.ts we can use

getService<T extends Service>(service: string)

instead of

getService<T extends Service>(service: ServiceType)

[tcm390]

hi @fibonacci998 I'm aware of this issue as well and have outlined my thoughts in #2348. So for custom services (not part of plugin-node), we want to avoid touching the core code or core types. Instead, we can let each custom service register whichever methods it needs, and then external code can invoke those methods through a function in runtime.ts.

For example, if I need to call the web search service from the image plugin, I could do:

const latestNews = await runtime.callServiceMethod(
            "web_search",
            "search",
            "latest news on AI Agents",
            {limit: 5, includeImages: true}
); 

What do you think of this approach?

[fibonacci998]

That's ok for me, all I need to do is avoiding edit packages/core when create new service @tcm390

[tcm390]

Sorry I pasted the wrong PR: here is the correct one: #2348