import { type ImageAttachmentRef } from '@deepseek-ai/dsh-attachment';
import { type SessionId as SessionIdType } from '@deepseek-ai/dsh-session';
import type { ImageGenerationQuality, ImageGenerationSize, ImageOutputFormat } from './config.ts';
declare const generationIdBrand: unique symbol;
/** Opaque identity for one image generation or edit request. */
export type GenerationId = string & {
    readonly [generationIdBrand]: true;
};
/** Brand one validated generation record id. */
export declare function GenerationId(value: string): GenerationId;
interface GenerationBase {
    id: GenerationId;
    sessionId: SessionIdType;
    createdAt: number;
    durationMs: number;
    operation: 'generate' | 'edit';
    backendId: string;
    model: string;
    prompt: string;
    sourceAttachments: ImageAttachmentRef[];
    size: ImageGenerationSize;
    quality: ImageGenerationQuality;
    outputFormat: ImageOutputFormat;
}
/** Successful image operation with its durable output attachment. */
export interface GenerationSuccess extends GenerationBase {
    status: 'success';
    outputAttachment: ImageAttachmentRef;
}
/** Failed image operation retained for the session sidebar. */
export interface GenerationFailure extends GenerationBase {
    status: 'error';
    error: string;
}
/** One persisted image generation or edit record. */
export type GenerationRecord = GenerationSuccess | GenerationFailure;
/** Session-isolated persistence for image generation and edit records. */
export declare class GenerationHistory {
    private readonly root;
    private readonly queues;
    constructor(root: string);
    /** Append one settled image operation. */
    append(record: GenerationRecord): Promise<void>;
    /** Return one session's operations newest first. */
    list(sessionId: SessionIdType): Promise<GenerationRecord[]>;
    /** Resolve one generation only inside its owning session. */
    get(sessionId: SessionIdType, id: GenerationId): Promise<GenerationRecord | undefined>;
}
export {};
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