import type { WakeState, Phase } from './types.js';
/**
 * Check if the current phase should advance based on elapsed time.
 * Automatically transitions ACTIVE → VIGIL when heartbeat is stale.
 * Returns the (possibly updated) phase.
 */
declare function checkAndAdvancePhase(state: WakeState): Phase;
/** Milliseconds remaining before VIGIL triggers. Negative if already past. */
declare function msUntilVigil(state: WakeState): number;
/** Whether the given phase allows will modifications. */
declare function canModifyWill(phase: Phase): boolean;
/** Whether the given phase allows beneficiary data access. */
declare function canAccessData(phase: Phase): boolean;
/** Validate a phase transition is legal. */
declare function isValidTransition(from: Phase, to: Phase): boolean;
export { checkAndAdvancePhase, msUntilVigil, canModifyWill, canAccessData, isValidTransition };