Function definePlugin

packages/core/sdk/src/plugin.ts:803–835

(
  authorFactory: (
    options?: TOptions,
  ) => PluginSpec<TId, TExtension, TStore, TExtensionService, THandlersLayer, TGroup>,
)

// eslint-disable-next-line @typescript-eslint/ban-types
export function definePlugin<
  TId extends string,
  TExtension extends object,
  TStore,
  TOptions extends object = {},
  // eslint-disable-next-line @typescript-eslint/no-explicit-any
  TExtensionService extends Context.Service<any, any> | undefined = undefined,
  // eslint-disable-next-line @typescript-eslint/no-explicit-any
  THandlersLayer extends Layer.Layer<any, any, any> = Layer.Layer<unknown, never, never>,
  TGroup extends HttpApiGroup.Any = HttpApiGroup.Any,
>(
  authorFactory: (
    options?: TOptions,
  ) => PluginSpec<TId, TExtension, TStore, TExtensionService, THandlersLayer, TGroup>,
): ConfiguredPlugin<TId, TExtension, TStore, TOptions, TExtensionService, THandlersLayer, TGroup> {
  return (options) => {
    const {
      storage: storageOverride,
      ...rest
    }: {
      storage?: (deps: StorageDeps) => TStore;
      [key: string]: unknown;
    } = options ?? {};

    const hasAuthorOptions = Object.keys(rest).length > 0;
    const spec = authorFactory(hasAuthorOptions ? (rest as TOptions) : undefined);

    return {
      ...spec,
      storage: storageOverride ?? spec.storage,
    };
  };
}

// ---------------------------------------------------------------------------
// AnyPlugin / PluginExtensions — type-level glue for the Executor surface.