/**
 * Guidance for errors raised when nothing registered a platform
 * implementation. Injected by the platform entry points at import time, so
 * the core never has to detect the runtime it is executing in.
 */
/**
 * Replaces the remediation advice in "nothing registered" errors with
 * something the platform entry point knows to be actionable.
 */
export declare function setPlatformSetupHint(hint: string): void;
/** @param subject - What is missing, e.g. "voice session setup strategy". */
export declare function missingRegistrationError(subject: string): Error;
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