/**
 * Ensures .gitignore ignores .lyse/ contents while keeping baseline.json
 * trackable. Git cannot re-include a file under an excluded *directory*, so we
 * use the contents-form `.lyse/*` and migrate any legacy `.lyse/` line.
 * No-op outside a git repo.
 */
export declare function ensureLyseGitignore(repoRoot: string): Promise<void>;