chore(release): 4.67.3 [skip ci]

## [4.67.3](https://github.com/antialias/soroban-abacus-flashcards/compare/v4.67.2...v4.67.3) (2025-10-23)

### Bug Fixes

* **complement-race:** resolve infinite render loop in useTrackManagement ([8b4dacd](8b4dacdc98))

CHANGELOG.md

@@ -1,3 +1,17 @@
+## [4.67.3](https://github.com/antialias/soroban-abacus-flashcards/compare/v4.67.2...v4.67.3) (2025-10-23)
+
+
+### Bug Fixes
+
+* **complement-race:** resolve infinite render loop in useTrackManagement ([8b4dacd](https://github.com/antialias/soroban-abacus-flashcards/commit/8b4dacdc98cc8cb2a503b31698430ad7ffb6ef8e))
+
+## [4.67.2](https://github.com/antialias/soroban-abacus-flashcards/compare/v4.67.1...v4.67.2) (2025-10-23)
+
+
+### Performance Improvements
+
+* **complement-race:** increase train position update frequency to 60fps ([fffaf1d](https://github.com/antialias/soroban-abacus-flashcards/commit/fffaf1df1d4d55c811bf634c957691e3564470d6))
+
 ## [4.67.1](https://github.com/antialias/soroban-abacus-flashcards/compare/v4.67.0...v4.67.1) (2025-10-22)
 
 

apps/web/src/app/arcade/complement-race/hooks/useSteamJourney.ts

@@ -34,7 +34,7 @@ const MOMENTUM_DECAY_RATES = {
 
 const MOMENTUM_GAIN_PER_CORRECT = 15 // Momentum added for each correct answer
 const SPEED_MULTIPLIER = 0.15 // Convert momentum to speed (% per second at momentum=100)
-const UPDATE_INTERVAL = 50 // Update every 50ms (~20 fps)
+const UPDATE_INTERVAL = 16 // Update every 16ms (~60 fps for smooth animation)
 const GAME_DURATION = 60000 // 60 seconds in milliseconds
 
 export function useSteamJourney() {

apps/web/src/app/arcade/complement-race/hooks/useTrackManagement.ts

@@ -104,7 +104,9 @@ export function useTrackManagement({
       setDisplayPassengers(passengers)
     }
     // Otherwise, keep displaying old passengers until train resets
-  }, [passengers, displayPassengers, trainPosition, currentRoute])
+    // Note: displayPassengers is intentionally NOT in deps to avoid infinite loop
+    // (it's used for comparison, but we don't need to re-run when it changes)
+  }, [passengers, trainPosition, currentRoute])
 
   // Generate ties and rails when path is ready
   useEffect(() => {

apps/web/src/arcade-games/complement-race/Provider.tsx

@@ -365,7 +365,7 @@ export function ComplementRaceProvider({ children }: { children: ReactNode }) {
   const MOMENTUM_GAIN_PER_CORRECT = 15
   const MOMENTUM_LOSS_PER_WRONG = 10
   const SPEED_MULTIPLIER = 0.15 // momentum * 0.15 = % per second
-  const UPDATE_INTERVAL = 50 // 50ms = ~20fps
+  const UPDATE_INTERVAL = 16 // 16ms = ~60fps for smooth animation
 
   // Transform multiplayer state to look like single-player state
   const compatibleState = useMemo((): CompatibleGameState => {
@@ -486,7 +486,12 @@ export function ComplementRaceProvider({ children }: { children: ReactNode }) {
     if (multiplayerState.gamePhase !== 'playing') {
       hasInitializedPositionRef.current = false
     }
-  }, [multiplayerState.gamePhase, multiplayerState.config.style, multiplayerState.players, localPlayerId])
+  }, [
+    multiplayerState.gamePhase,
+    multiplayerState.config.style,
+    multiplayerState.players,
+    localPlayerId,
+  ])
 
   // Initialize game start time when game becomes active
   useEffect(() => {
@@ -636,7 +641,7 @@ export function ComplementRaceProvider({ children }: { children: ReactNode }) {
 
     console.log('[POS_BROADCAST] Starting position broadcast interval')
 
-    // Send position update every 100ms for smoother ghost trains (reads from refs to avoid restarting interval)
+    // Send position update every 16ms (~60fps) for smoother ghost trains (reads from refs to avoid restarting interval)
     const interval = setInterval(() => {
       const currentPos = clientPositionRef.current
       broadcastCountRef.current++
@@ -659,7 +664,7 @@ export function ComplementRaceProvider({ children }: { children: ReactNode }) {
         userId: viewerId || '',
         data: { position: currentPos },
       } as ComplementRaceMove)
-    }, 100)
+    }, 16)
 
     return () => {
       console.log(`[POS_BROADCAST] Stopping interval (sent ${broadcastCountRef.current} updates)`)

package.json

@@ -1,6 +1,6 @@
 {
   "name": "soroban-monorepo",
-  "version": "4.67.1",
+  "version": "4.67.3",
   "private": true,
   "description": "Beautiful Soroban Flashcard Generator - Monorepo",
   "workspaces": [