/**
 * Returns true if the file's first line contains '// custom' (case-insensitive).
 */
export declare function hasCustomMarker(filePath: string): boolean;
/**
 * Read the .planu-do-not-heal allowlist from projectRoot/planu/.
 * Returns a Set of relative file names (e.g. 'conventions.json').
 */
export declare function readDoNotHealList(projectRoot: string): Set<string>;
/**
 * Returns true if the file is in the .planu-do-not-heal allowlist.
 */
export declare function isInAllowlist(filePath: string, allowlist: Set<string>): boolean;
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