Function computeActive

lib/gstack-decision.ts:185–195

(events: DecisionEvent[])

 * order (oldest first).
 */
export function computeActive(events: DecisionEvent[]): ActiveDecision[] {
  const retired = new Set<string>();
  for (const e of events) {
    if ((e.kind === "supersede" || e.kind === "redact") && e.supersedes) {
      retired.add(e.supersedes); // dangling target id is harmless — just a no-op
    }
  }
  return events
    .filter((e): e is ActiveDecision => e.kind === "decide" && !retired.has(e.id))
    .sort((a, b) => (a.date < b.date ? -1 : a.date > b.date ? 1 : 0));
}

/**
 * Scope filter for resurfacing: repo-scoped decisions always apply; branch-scoped