export declare const MAX_DIGEST_CHARS = 4000;
export interface DigestTask {
    id: string;
    title: string;
    assignee: string;
    status: string;
}
export interface DigestInput {
    role: string;
    generation: number;
    previous: {
        tasks: number;
        tokens: number;
        cap: {
            tasks?: number;
            tokens?: number;
        };
        reason: 'tasks' | 'tokens';
    };
    tasks: DigestTask[];
    /** Rotations in a row after which no task finished. */
    stalled: number;
    budget: {
        usd: number;
        maxUsd?: number;
        tokens: number;
        maxTokens?: number;
    };
}
/** The digest, never longer than `maxChars`. */
export declare function buildRotationDigest(input: DigestInput, maxChars?: number): string;
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