Function writeSnapshot

lib/gstack-decision.ts:226–230

(paths: DecisionPaths, active: ActiveDecision[])

 * O(active), not O(history).
 */
export function writeSnapshot(paths: DecisionPaths, active: ActiveDecision[]): void {
  const tmp = `${paths.snapshot}.tmp.${process.pid}`;
  writeFileSync(tmp, JSON.stringify(active), "utf-8");
  renameSync(tmp, paths.snapshot);
}

/** Read the bounded active snapshot. Returns [] if missing/corrupt (caller may rebuild). */
export function readSnapshot(paths: DecisionPaths): ActiveDecision[] {