type AuditEvent = { readonly id: string; readonly kind: "created" | "reviewed" | "approved"; readonly detail: string; }; const events: AuditEvent[] = [ { id: "evt-001", kind: "created", detail: "draft request opened" }, { id: "evt-002", kind: "reviewed", detail: "extraction fixture marker: shared code sample" }, { id: "evt-003", kind: "approved", detail: "manager approval recorded" }, ]; function describeReviewEvents(auditEvents: readonly AuditEvent[]): string[] { return auditEvents .filter((event) => event.kind === "reviewed") .map((event) => `${event.id}: ${event.detail}`); } for (const description of describeReviewEvents(events)) { console.log(description); }