Function diffMaps

packages/cli/src/utils.ts:161–184

(
  before: Map<string, V>,
  after: Map<string, V>,
)

 * Diff two Maps — returns added, removed, and modified keys.
 */
export function diffMaps<V>(
  before: Map<string, V>,
  after: Map<string, V>,
): { added: string[]; removed: string[]; modified: string[] } {
  const added: string[] = [];
  const removed: string[] = [];
  const modified: string[] = [];

  for (const key of after.keys()) {
    if (!before.has(key)) {
      added.push(key);
    } else if (JSON.stringify(before.get(key)) !== JSON.stringify(after.get(key))) {
      modified.push(key);
    }
  }

  for (const key of before.keys()) {
    if (!after.has(key)) {
      removed.push(key);
    }
  }

  return { added, removed, modified };
}