/**
 * YAML runtime version constants.
 * The recipe `version` field is ignored metadata — the package major version is
 * the compatibility boundary, not an in-schema version. `extractMajorVersion`
 * survives only to stamp informational `schemaVersion` metadata on the registry.
 */
export declare const CURRENT_RUNTIME_VERSION = 1;
/** @deprecated Use CURRENT_RUNTIME_VERSION */
export declare const CURRENT_RECIPE_VERSION = 1;
/**
 * Extract the major (structural) version from the YAML `version` field.
 * Accepts an integer (e.g. `1`), a semver-like string (e.g. `"1.6.0"` → `1`),
 * or undefined/null (defaults to CURRENT_RUNTIME_VERSION).
 */
export declare function extractMajorVersion(version: string | number | undefined | null): number;
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