/**
 * Portable destination-path overlap detection for staged files.
 *
 * Two `dest` paths "overlap" when one is the same as, or a parent directory of,
 * the other (`a/b` vs `a/b/c`). Overlapping destinations make authoritative,
 * order-dependent staging ambiguous — one entry would clobber or nest inside the
 * other — so callers reject them.
 *
 * Comparison is deliberately conservative for cross-platform fixtures: path
 * separators are normalized, `.` segments dropped, and segments compared
 * case-insensitively so `Tests` and `tests/key.json` are flagged on the
 * case-insensitive filesystems (macOS, Windows) where they collide at runtime.
 */
/** Split a `dest` into comparison segments (separator-normalized, `.`-stripped). */
export declare function destSegments(dest: string): string[];
/**
 * Whether two segment lists overlap, and how. `undefined` means disjoint.
 * `"duplicate"` means the same normalized path; `"nested"` means one is an
 * ancestor of the other.
 */
export declare function segmentsOverlap(a: readonly string[], b: readonly string[]): "duplicate" | "nested" | undefined;
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