/**
 * Git branch detection utility
 *
 * Provides auto-detection of current git branch with fallback handling
 * for edge cases like detached HEAD and non-git repositories.
 *
 * IMPORTANT: Uses spawnSync instead of execSync to avoid WSL2 TTY/GPG hangs.
 * execSync spawns a shell which can get into weird states on WSL2.
 */
/**
 * Get the current git branch name
 *
 * @returns Current git branch name, or fallback value for edge cases
 *
 * Behavior:
 * - Returns current branch name in normal git repository
 * - Returns "detached" when HEAD is detached
 * - Returns "unknown" when not in a git repository
 * - Respects LEX_DEFAULT_BRANCH environment variable as override
 * - Respects LEX_GIT_MODE=off to skip git calls entirely
 * - Caches result for performance
 *
 * @example
 * ```ts
 * const branch = getCurrentBranch();
 * console.log(`Current branch: ${branch}`);
 * ```
 */
export declare function getCurrentBranch(): string;
/**
 * Clear the branch cache
 *
 * Useful for testing or when the branch might have changed
 * (e.g., after a checkout operation)
 */
export declare function clearBranchCache(): void;