export type FloorSpan = {
    readonly start: number;
    readonly end: number;
};
export type FloorLocation = {
    readonly kind: "found";
    readonly span: FloorSpan;
} | {
    readonly kind: "absent";
} | {
    readonly kind: "refused";
    readonly reason: string;
};
export declare function isRewritable(sourcePath: string): boolean;
/**
 * Locates the floor value as a byte span so the caller can splice it. Nothing
 * outside the span is re-emitted: a serializer round-trip would preserve the
 * comment a blocked reader needs and still refold every other line
 * (project-map:DLT-028).
 */
export declare function locateFloor(text: string): FloorLocation;
export declare function withFloorRaised(text: string, span: FloorSpan, release: string): string;