{
  "context": "Tests whether the agent follows memory-safety patterns for UIViewController including block-based Timer API with weak capture, delegate declared with AnyObject constraint and stored as weak, deinit logging, super calls in lifecycle methods, re-captured [weak self] in nested stored closures, and NotificationCenter observer removal in deinit.",
  "type": "weighted_checklist",
  "checklist": [
    {
      "name": "Timer block-based API",
      "description": "Timer is created using Timer.scheduledTimer(withTimeInterval:repeats:block:) — NOT the target-selector form Timer(target:selector:userInfo:repeats:) or Timer.scheduledTimer(timeInterval:target:selector:userInfo:repeats:)",
      "max_score": 12
    },
    {
      "name": "Timer weak self capture",
      "description": "The Timer block captures [weak self] in its capture list",
      "max_score": 10
    },
    {
      "name": "Timer invalidated in viewWillDisappear",
      "description": "timer?.invalidate() (or equivalent) is called inside an override of viewWillDisappear(_:) — NOT in deinit or viewDidDisappear",
      "max_score": 12
    },
    {
      "name": "deinit log statement",
      "description": "The class contains a deinit block with at least one print() or os_log/Logger statement inside it",
      "max_score": 8
    },
    {
      "name": "super in lifecycle overrides",
      "description": "Every overridden UIViewController lifecycle method (viewDidLoad, viewWillAppear, viewDidAppear, viewWillDisappear, viewDidDisappear, etc.) calls super",
      "max_score": 8
    },
    {
      "name": "Delegate AnyObject constraint",
      "description": "StopwatchDelegate protocol declaration includes ': AnyObject' (or the equivalent class keyword) as a constraint",
      "max_score": 10
    },
    {
      "name": "Delegate stored as weak",
      "description": "The delegate property is declared as 'weak var delegate: StopwatchDelegate?' — marked weak, optional, and uses the correct type",
      "max_score": 10
    },
    {
      "name": "Escaping closures use [weak self]",
      "description": "All escaping closure literals (stored callbacks, completion handlers, notification blocks) capture [weak self] rather than a strong reference to self",
      "max_score": 8
    },
    {
      "name": "Nested closure re-captures [weak self]",
      "description": "When a stored inner closure is created inside an escaping outer closure, the inner closure's capture list independently captures [weak self] — it does NOT rely solely on a guard-let self from the outer closure scope",
      "max_score": 12
    },
    {
      "name": "NotificationCenter observer removed in deinit",
      "description": "If NotificationCenter observers are registered using the block-based API (addObserver(forName:object:queue:using:)), the returned observer token is removed (removeObserver) inside deinit",
      "max_score": 10
    }
  ]
}