challenge-specific immersive room
Harden cache invalidation plan
A focused WebXR-ready arena for this mission, with spoken commands, real safe-judge controls, Genie voice coaching, and fallback 3D for normal browsers.
Checkingkeyboard fallbackSYSTEM DESIGN MINI
Open classic workspaceBooting immersive renderer
Immersive Answer Stream
Checking
Immersive Control Deck
Support status
Checking WebXR support...
Challenge board focused
Say: Read the problem
Say: Give me a hint
Say: Run tests
Rank Signal
Level 5Terminal Rookie
2840
XP
410
Coins
6
Streak
Latest Checks
Run tests from the control deck or say “Run tests” to populate this panel.
Genie is in VR voice mode. Ask for a short hint, error explanation, or progress readout.
Open Next ChallengeGenie Mentor Core
VR Voice protocol / contextual guardrails active
Progressive hints
Failed-test aware
Solution guarded
Mission: system-design-hard-cache-invalidation0 attempts0 failed tests0 hints used
Progressive hint depth
Genie: Genie online. I use your mission, attempts, failed tests, hints, and path context to coach the next rep without dumping answers first.