Playback Webview Debugging

Playback WebView Debugging

Use this skill when playback, auth recovery, queue sync, or hidden WebView state diverges from the native Swift state.

When To Use It

• Playback starts, stops, or advances unexpectedly
• Auth looks stale and API calls return 401/403
• WebView metadata drifts from the native queue
• You need to inspect JavaScript bridge events or DOM/player state

Runtime Workflow

1. Reproduce with the packaged app or Scripts/compile_and_run.sh.
2. Use Xcode Console filters to watch runtime logs: subsystem:Kaset category:player subsystem:Kaset category:auth
3. In debug builds, verify webView.isInspectable = true, then inspect the player WebView with Safari Web Inspector.
4. To simulate auth expiry, delete __Secure-3PAPISID via Safari Web Inspector storage tools and trigger an authenticated API call.
5. If auth cookies or headers look suspicious, run swift run api-explorer auth and compare against the exported cookie state.

Landmarks

• docs/testing.md
• docs/playback.md
• Sources/Kaset/Views/MiniPlayerWebView.swift
• Sources/Kaset/Views/SingletonPlayerWebView+ObserverScript.swift
• Sources/Kaset/Views/SingletonPlayerWebView+NavigationState.swift
• Sources/Kaset/Views/SingletonPlayerWebView+QueueInjection.swift
• Sources/Kaset/Services/Player/PlayerService.swift
• Sources/Kaset/Services/Player/PlayerService+WebPlaybackIdentity.swift
• Sources/Kaset/Services/Player/PlayerService+WebQueueSync.swift
• Sources/Kaset/Services/Player/PlayerService+QueueNavigationRecovery.swift
• Sources/Kaset/Services/WebKit/WebKitManager.swift