Function mergeHooksSettings

src/utils/plugins/pluginLoader.ts:1855–1880

* Merge two HooksSettings objects

(
  base: HooksSettings | undefined,
  additional: HooksSettings,
)

 * Merge two HooksSettings objects
 */
function mergeHooksSettings(
  base: HooksSettings | undefined,
  additional: HooksSettings,
): HooksSettings {
  if (!base) {
    return additional
  }

  const merged = { ...base }

  for (const [event, matchers] of Object.entries(additional) as [
    string,
    HookMatcher[],
  ][]) {
    if (!merged[event as keyof HooksSettings]) {
      merged[event as keyof HooksSettings] = matchers
    } else {
      // Merge matchers for this event
      const existing = ((merged[event as keyof HooksSettings] as unknown) ??
        []) as HookMatcher[]
      merged[event as keyof HooksSettings] = [...existing, ...matchers]
    }
  }

  return merged
}

/**
 * Shared discovery/policy/merge pipeline for both load modes.