/**
 * SID naming guard. Enforces the "two-axis" convention from spec §0:
 * session id: YYYY-MM-DD-session-<3-6 chars lowercase alnum>
 * change id: kebab-case
 *
 * Spec §8.7 — bare forms (sid-3 / sid-h / sid-r / unknown-sid) are
 * blocked at write time, NOT tolerated. After slice
 * bare sids are now rejected by callers using `assertValidSessionId`
 * instead.
 */
export declare const SID_FORMAT_DESCRIPTION = "<YYYY-MM-DD>-session-<3-6 chars lowercase alnum>, e.g. 2026-06-11-session-abc123";
export declare function isValidSessionId(sid: string): boolean;
export declare function isValidChangeId(cid: string): boolean;
export declare function isBareSid(name: string): boolean;
export declare function assertValidSessionId(sid: string): void;
export declare function assertValidChangeId(cid: string): void;