/** Parse the @cortex-hook-version stamp from hook source, or null if absent/malformed. */
export declare function parseHookVersion(src: string): string | null;
/**
 * Keep version-stamped hooks in HOOKS_DIR in sync with the shipped defaults.
 *
 * A default hook that carries an `// @cortex-hook-version YYYY.M.D` stamp is (re)written into
 * HOOKS_DIR whenever the shipped stamp is newer than the deployed one. A missing or unstamped
 * deployed copy counts as oldest, so legacy installs are brought under management on first run.
 * Unmanaged defaults (no stamp) are left to init's copy-if-missing (deployHooks/safeCopy) and are
 * never touched here. Idempotent and crash-safe via atomicWrite.
 *
 * `opts` exists for tests; production calls it with no args (real DEFAULTS_DIR/HOOKS_DIR).
 * Returns the list of hook filenames that were updated.
 */
export declare function syncManagedHooks(opts?: {
    srcDir?: string;
    dstDir?: string;
}): Promise<string[]>;