Adaptive difficulty now tells you when your path changes
Finishing a chapter that adapts your remaining path now shows a notice explaining the change, and your progress signals are captured reliably even on flaky connections.
Adaptive difficulty used to work silently: acing or struggling through a chapter re-banded the rest of your path with no explanation, and the difficulty labels just looked different on the next visit. The adaptation is now visible and more dependable.
- Completing a chapter that shifts your remaining chapters up or down a difficulty level now shows a notice explaining what changed and why.
- Your chapter performance is recorded server-side the moment you complete a step, so your readiness profile updates even if your connection drops before the browser can report it.
- Flashcard deck scores now count toward your demonstrated readiness, so acing a deck genuinely moves your profile.
- Completing the same chapter twice (for example after a connection retry) no longer double-adjusts the difficulty of your remaining path.
- Generation hiccups now fall back to your existing lesson content instead of an error page.