Function filterByScope

lib/gstack-decision.ts:202–209

(active: ActiveDecision[], ctx: { branch?: string; issue?: string })

 * issue matches. (Recency != relevance — callers filter by scope, not just date.)
 */
export function filterByScope(active: ActiveDecision[], ctx: { branch?: string; issue?: string }): ActiveDecision[] {
  return active.filter((d) => {
    if (d.scope === "repo") return true;
    if (d.scope === "branch") return !!ctx.branch && d.branch === ctx.branch;
    if (d.scope === "issue") return !!ctx.issue && d.issue === ctx.issue;
    return false; // unknown/garbage scope: fail conservative, don't leak into every context
  });
}

/** Append a validated event atomically (single-line, concurrency-safe). */
export function appendEvent(paths: DecisionPaths, event: DecisionEvent): void {