export interface HistoricalAttachment {
    readonly displayName: string;
    readonly fileRef: string;
}
interface ContentLike {
    readonly type: string;
    readonly text?: string;
    readonly [key: string]: unknown;
}
export interface AttachmentLinkProjection {
    readonly content: readonly ContentLike[];
    readonly attachments: readonly HistoricalAttachment[];
}
interface StoredHistoryEntry {
    readonly component: unknown;
    readonly options: {
        readonly key?: string;
        readonly priority?: number;
        readonly locale?: string;
    };
    readonly registrant?: string;
}
export interface HistorySlotRegistry {
    entries(name: string): readonly StoredHistoryEntry[];
    inject(name: "conversation.chat.node", callback: () => () => void): () => void;
    register(options: Record<string, unknown>, component: unknown): () => void;
}
export interface HistoricalAttachmentMetadata {
    readonly displayName: string;
    readonly detectedType: string;
    readonly size: number;
}
export type HistoricalAttachmentResolver = (sessionId: string, fileRef: string) => Promise<HistoricalAttachmentMetadata>;
export declare function projectAttachmentLinks(content: readonly ContentLike[]): AttachmentLinkProjection;
export declare function installAttachmentHistoryProjection(slots: HistorySlotRegistry, resolve?: HistoricalAttachmentResolver): () => void;
export {};