import type { ImageContent } from "@caupulican/pi-ai";
export interface StoredSessionImage {
    readonly sequence: number;
    readonly path: string;
    readonly mimeType: string;
    readonly bytes: Uint8Array;
}
export interface SessionImageStoreOptions {
    agentDir: string;
    cwd: string;
    sessionId: string;
    directory?: string;
    now?: () => number;
}
export declare function resolveSessionImageDirectory(options: SessionImageStoreOptions): string;
export declare class SessionImageStore {
    readonly directory: string;
    private readonly sessionKey;
    private readonly now;
    constructor(options: SessionImageStoreOptions);
    /** Validate and durably retain provider-neutral image content, reusing its claimed sequence only
     * when that sequence already contains the exact same bytes and normalized MIME type. */
    retainContent(content: ImageContent, preferredSequence?: number): StoredSessionImage;
    write(bytes: Uint8Array, mimeType: string): StoredSessionImage;
    read(sequence: number): StoredSessionImage | undefined;
    readLatest(): StoredSessionImage | undefined;
    resolveReferences(text: string): ImageContent[];
    private referencesLatestImage;
    private readEntry;
    private scan;
    private prune;
}
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