/**
 * Pure `.gitignore` rendering for transactional Init planning.
 *
 * Every customer filesystem mutation is materialized through the authored
 * transaction only after the fixed promotion journal is durable.
 */
/** Pure byte renderer for Init's managed `.gitignore` entry. */
export declare function renderGitignore(existing: string | undefined): {
    readonly content: string;
    readonly changed: boolean;
};
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