declare const MARKER_START = "<!-- loopgraph:managed:start -->";
declare const MARKER_END = "<!-- loopgraph:managed:end -->";
export type UpsertOutcome = "created" | "appended" | "replaced" | "unchanged";
export interface UpsertResult {
    outcome: UpsertOutcome;
}
/**
 * Idempotent managed-section upsert (Proposal 013 B1).
 *
 * - Both markers present → replace content between them, preserve content outside.
 * - File exists but no markers → append a new managed block.
 * - File does not exist → create with markers wrapping the body.
 * - Content identical → return "unchanged", no disk write.
 *
 * The body is always stored between markers. User content outside the markers
 * is never touched.
 */
export declare function upsertManagedSection(filePath: string, body: string): Promise<UpsertResult>;
export { MARKER_START, MARKER_END };
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