/**
 * Remove Takumi Guard proxy URLs from the nearest enclosing bun.lock.
 *
 * Bun writes the workspace root's lockfile even when an install runs from a child package. In a
 * Git checkout the search climbs to that root; without a checkout boundary it inspects only the
 * starting directory so it cannot rewrite an unrelated ancestor's lockfile. The proxy is
 * install-time policy rather than repository state: an empty resolved slot still makes Bun use the
 * configured default registry.
 *
 * @returns The normalized lockfile path, or undefined when no change was needed.
 */
export declare function normalizeBunLockfile(startDirPath: string): string | undefined;