/**
 * The single-sourced path canonicalization for ownership identity (INV-SOO-09).
 *
 * Resolves a path to a stable physical-file key: absolute (against `root` when
 * supplied, else cwd), `..`/`.`-collapsed (via `resolve`), separators normalized
 * to `/`, and case-folded on a case-insensitive filesystem. All spellings of one
 * file therefore collide, closing the rel/abs/case/`..` mismatch (CE-004).
 *
 * Symlink identity is a RECORDED RESIDUAL, not silently treated as disjoint
 * (INV-SOO-09 / fail-3): when `resolveSymlinks` is set and the path exists, the
 * realpath is folded in so `link.ts → x.ts` collides; when realpath is
 * unavailable (path absent, or FS symlink resolution out of scope) the lexical
 * canonical key is used and the unresolved case degrades to the downstream merge
 * guard rather than being asserted disjoint here.
 *
 * This is the ONLY normalization scheme for ownership identity — callers must
 * not introduce a second one (failure-mode: path-identity mismatch). It lives in
 * `audit-tools/shared` so BOTH orchestrators' ownership scheduling resolves file
 * identity identically (a remediate write-scope and an audit read-scope key the
 * same file the same way).
 */
export declare function canonicalizeFilePath(path: string, opts?: {
    root?: string;
    resolveSymlinks?: boolean;
}): string;
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