/** Protocol constants (SPEC.md §1.2, §9 are normative). */
/** Latest SSP2 envelope wire version emitted by current clients. */
export declare const PROTOCOL_WIRE_VERSION = 3;
/** Oldest SSP2 envelope wire version accepted. Wire version 3 changed the
 * push payload to the sparse row codec (§2.4) and the conflict record shape
 * (§6.3); versions 1 and 2 are rejected as unknown (§9). */
export declare const MINIMUM_PROTOCOL_WIRE_VERSION = 3;
/** Wire versions implemented by the reference codec, oldest first. */
export declare const SUPPORTED_PROTOCOL_WIRE_VERSIONS: readonly number[];
/** Whether the reference codec implements this exact wire version. */
export declare function isSupportedProtocolWireVersion(wireVersion: number): boolean;
/** Magic bytes opening every SSP2 sync envelope (SPEC.md §1.2). */
export declare const SYNC_PACK_MAGIC = "SSP2";