/**
 * Clean up a stale branch (both remote and local).
 * Safe to delete both since no PR exists for this branch.
 *
 * Returns true if cleanup succeeded or should continue, false if should skip GHSA.
 */
export declare function cleanupStaleBranch(branch: string, ghsaId: string, cwd: string): Promise<boolean>;
/**
 * Clean up branches after PR creation failure.
 * Safe to delete both remote and local since no PR was created.
 */
export declare function cleanupFailedPrBranches(branch: string, cwd: string): Promise<void>;
/**
 * Clean up local branch after successful PR creation.
 * Keeps remote branch - PR needs it to be mergeable.
 */
export declare function cleanupSuccessfulPrLocalBranch(branch: string, cwd: string): Promise<void>;
/**
 * Clean up branches in catch block after unexpected error.
 * Safe to delete both remote and local since no PR was created.
 */
export declare function cleanupErrorBranches(branch: string, cwd: string, remoteBranchExists: boolean): Promise<void>;
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