import type { ModelContext, ModelContextWithResources, ResourceDescriptor } from './types.js';
/**
 * Install the resource extension onto a `document.modelContext` object. Safe to
 * call repeatedly: the second call is a no-op. Mutates `mc` in place and returns
 * it typed with the resource surface.
 */
export declare function installResourceExtension(mc: ModelContext): ModelContextWithResources;
/**
 * Producer-side convenience: register a live-state resource on
 * `document.modelContext` without casting. Equivalent to
 * `document.modelContext.registerResource(...)` but SSR-safe (a no-op when no
 * model context is present). Returns an unregister function.
 */
export declare function registerResource<T = unknown>(resource: ResourceDescriptor<T>): () => void;
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