import { type SceneDocumentData } from "@skenora/contracts";
import type { EventPublisher } from "@skenora/events";
import type { ResourceResolver } from "@skenora/resources";
import type { RuntimeEventMap } from "./runtime-events.js";
export interface LoadDocumentOptions {
    signal?: AbortSignal;
    /** Strict rolls the complete projection back; best-effort keeps valid models. */
    modelLoadPolicy?: "strict" | "best-effort";
}
export interface RuntimeDocumentProjectionContext {
    readonly generation: number;
    readonly signal?: AbortSignal;
    readonly modelLoadPolicy: NonNullable<LoadDocumentOptions["modelLoadPolicy"]>;
    isCurrent(): boolean;
}
export type RuntimeDocumentProjector = (document: Readonly<SceneDocumentData>, resources: ResourceResolver, context: RuntimeDocumentProjectionContext) => Promise<boolean>;
/**
 * Owns document load generations, validation, lifecycle events, and rollback.
 * The injected projector owns only Babylon projection details.
 */
export declare class RuntimeDocumentCoordinator {
    #private;
    constructor(events: EventPublisher<RuntimeEventMap>, resetProjection: () => void, project: RuntimeDocumentProjector, preflight?: (document: Readonly<SceneDocumentData>) => void);
    /** Advances only after valid input is accepted; invalid replacement leaves it unchanged. */
    get generation(): number;
    load(input: Readonly<SceneDocumentData>, resources: ResourceResolver, options?: LoadDocumentOptions): Promise<void>;
    dispose(): void;
}
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