/**
 * Reseed the userspace CSPRNG at a restore boundary (fresh-run identity injection AND every wake —
 * clause 3), before any run code draws randomness. Idempotent and side-effect-free beyond the
 * reseed; safe to call repeatedly. Returns whether the reseed ran (false = addon unavailable, the
 * degraded no-op path). Never throws.
 */
export declare function reseedUserspaceCsprng(): boolean;