import type { Session } from '../../types/api';
export interface ThreadCompactModeInput {
    /** Callers that always want the compact renderer (looper orchestrator UI). */
    forceCompact?: boolean;
    sessionType?: Session['sessionType'];
    /** `preferences.compactThread` — the user-facing "compact thread" toggle. */
    compactThreadPreference: boolean;
}
export interface ThreadCompactMode {
    /** Drives the row model: exploratory parts collapse to activity lines. */
    compact: boolean;
    /** Lets a narrow thread use compact *density* without compact rendering. */
    responsiveCompact: boolean;
}
/**
 * Single source of truth for how the compact-thread preference reaches the
 * thread rows. Kept as plain logic so the preference → row-variant path is
 * testable without mounting the virtualized list.
 */
export declare function resolveThreadCompactMode({ forceCompact, sessionType, compactThreadPreference, }: ThreadCompactModeInput): ThreadCompactMode;
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