/**
 * Where this host keeps a run.
 *
 * A run's file name is the SHA-256 of its public run id, so an id containing a
 * separator, a leading dot, or a character this filesystem cannot spell still
 * names exactly one file directly beneath the authorized root. Hashing is also
 * what removes the need for a second registry: discovery is arithmetic on the
 * id, and there is no index to disagree with the files.
 *
 * The root and the path it produces are host arrangement, not identity. A run
 * moved to another root is the same run, which is why the run id is also stored
 * inside the database and checked against the one that was asked for.
 */
/** The lowercase hexadecimal SHA-256 of a run id's UTF-8 bytes. */
export declare function hashRunId(runId: string): string;
/** The file a run id names beneath `root`. */
export declare function workflowRunPath(root: string, runId: string): string;
/**
 * Where a fork is built while it is being proved.
 *
 * A suffix in the same namespace as the lock, and a candidate pattern of
 * `<hash>.sqlite` exactly excludes it: nothing discovers it, nothing lists it,
 * and no run id resolves to it. That is what lets a fork be assembled in full —
 * schema, run, inherited prefix, retained roots and a restored Workspace — and
 * replayed against its own filesystem before any storage the host would
 * recognize as the new run exists.
 *
 * It is scratch. Whoever creates it removes it, and one left behind by an
 * interrupted attempt is replaced rather than resumed.
 */
export declare function workflowForkStaging(root: string, runId: string): string;
/**
 * The advisory lock one run's executor holds.
 *
 * A suffix rather than a subdirectory, so every path a run occupies is derived
 * from one hash and inspection's candidate pattern — `<hash>.sqlite` exactly —
 * excludes it by construction. It is not retained run state: it is how one host
 * arranges ownership, and it may remain, empty, after the run is deleted.
 */
export declare function workflowRunLock(root: string, runId: string): string;