import type { AttachmentStore } from '@wrongstack/core/types';
/** Maximum number of retained attachment previews. */
export declare const TOKEN_PREVIEWS_MAX_ENTRIES = 64;
/** Maximum characters retained for one attachment preview. */
export declare const TOKEN_PREVIEW_MAX_CHARS: number;
/** Maximum content lines retained before the truncation marker. */
export declare const TOKEN_PREVIEW_MAX_LINES = 6;
/** Maximum characters retained across all attachment previews. */
export declare const TOKEN_PREVIEWS_MAX_CHARS: number;
/** Maximum UTF-8 bytes inlined for a text-file mention. Larger files remain
 * attachable as path references with an explicit read-until-EOF contract. */
export declare const TEXT_FILE_ATTACHMENT_INLINE_MAX_BYTES: number;
export interface TokenPreviewBudget {
    maxEntries?: number | undefined;
    maxChars?: number | undefined;
    maxPreviewChars?: number | undefined;
    maxPreviewLines?: number | undefined;
}
/** Build an independent, hard-capped display preview from canonical content. */
export declare function createTokenPreview(value: string, maxChars?: number, maxLines?: number): string;
/**
 * LRU map of attachment token → bounded display preview. Canonical full
 * content remains exclusively in AttachmentStore and is resolved on demand.
 */
export declare class TokenPreviewStore {
    private readonly map;
    private totalChars;
    private readonly maxEntries;
    private readonly maxChars;
    private readonly maxPreviewChars;
    private readonly maxPreviewLines;
    constructor(budget?: TokenPreviewBudget);
    get size(): number;
    get chars(): number;
    get(token: string): string | undefined;
    has(token: string): boolean;
    set(token: string, value: string): void;
    delete(token: string): boolean;
    clear(): void;
    keysOldestFirst(): string[];
    private evict;
}
/** Resolve text/file tokens from the canonical store without caching payloads. */
export declare function resolveAttachmentTokens(text: string, attachments: AttachmentStore): Promise<string>;
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