chore(release): 4.65.1 [skip ci]

## [4.65.1](https://github.com/antialias/soroban-abacus-flashcards/compare/v4.65.0...v4.65.1) (2025-10-22)

### Bug Fixes

* **complement-race:** use sendMove with correct parameters for position updates ([06cd94b](06cd94b24c))

CHANGELOG.md

@@ -1,3 +1,24 @@
+## [4.65.1](https://github.com/antialias/soroban-abacus-flashcards/compare/v4.65.0...v4.65.1) (2025-10-22)
+
+
+### Bug Fixes
+
+* **complement-race:** use sendMove with correct parameters for position updates ([06cd94b](https://github.com/antialias/soroban-abacus-flashcards/commit/06cd94b24cdd9dbd36fb5800c9ba7be194f7eed0))
+
+## [4.65.0](https://github.com/antialias/soroban-abacus-flashcards/compare/v4.64.2...v4.65.0) (2025-10-22)
+
+
+### Features
+
+* **complement-race:** implement position broadcasting for ghost trains ([c5fba5b](https://github.com/antialias/soroban-abacus-flashcards/commit/c5fba5b7dd0f36fd3bbe596409e01b0d3dbd4fbe))
+
+## [4.64.2](https://github.com/antialias/soroban-abacus-flashcards/compare/v4.64.1...v4.64.2) (2025-10-22)
+
+
+### Bug Fixes
+
+* **complement-race:** use individual player positions for ghost trains ([00dc4b1](https://github.com/antialias/soroban-abacus-flashcards/commit/00dc4b1d06a4e1763deb16333a298145cafd9187))
+
 ## [4.64.1](https://github.com/antialias/soroban-abacus-flashcards/compare/v4.64.0...v4.64.1) (2025-10-22)
 
 

apps/web/src/app/arcade/complement-race/components/RaceTrack/GhostTrain.tsx

@@ -47,10 +47,10 @@ export function GhostTrain({ player, trainPosition, trackGenerator, pathRef }: G
   const hasLoggedRef = useRef(false)
   useEffect(() => {
     if (!hasLoggedRef.current && trainTransform.opacity > 0) {
-      console.log('[GhostTrain] rendering:', player.name)
+      console.log('[GhostTrain] rendering:', player.name, 'at position:', trainPosition.toFixed(1))
       hasLoggedRef.current = true
     }
-  }, [trainTransform.opacity, player.name])
+  }, [trainTransform.opacity, player.name, trainPosition])
 
   // Don't render if position data isn't ready
   if (trainTransform.opacity === 0) {

apps/web/src/app/arcade/complement-race/components/RaceTrack/SteamTrainJourney.tsx

@@ -217,7 +217,13 @@ export function SteamTrainJourney({
   // Log only when otherPlayers count changes
   useEffect(() => {
     console.log('[SteamTrainJourney] otherPlayers count:', otherPlayers.length)
-  }, [otherPlayers.length])
+    if (otherPlayers.length > 0) {
+      console.log(
+        '[SteamTrainJourney] ghost positions:',
+        otherPlayers.map((p) => `${p.name}: ${p.position.toFixed(1)}`).join(', ')
+      )
+    }
+  }, [otherPlayers.length, otherPlayers])
 
   if (!trackData) return null
 
@@ -285,7 +291,7 @@ export function SteamTrainJourney({
           <GhostTrain
             key={player.id}
             player={player}
-            trainPosition={trainPosition} // For now, use same position calculation
+            trainPosition={player.position} // Use each player's individual position
             trackGenerator={trackGenerator}
             pathRef={pathRef}
           />

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

@@ -564,6 +564,32 @@ export function ComplementRaceProvider({ children }: { children: ReactNode }) {
     }
   }, [multiplayerState.currentRoute, compatibleState.style, multiplayerState.passengers.length])
 
+  // Broadcast position to server for multiplayer ghost trains
+  useEffect(() => {
+    if (!compatibleState.isGameActive || compatibleState.style !== 'sprint' || !localPlayerId) {
+      return
+    }
+
+    // Send position update every 200ms
+    const interval = setInterval(() => {
+      sendMove({
+        type: 'UPDATE_POSITION',
+        playerId: localPlayerId,
+        userId: viewerId || '',
+        data: { position: clientPosition },
+      } as ComplementRaceMove)
+    }, 200)
+
+    return () => clearInterval(interval)
+  }, [
+    compatibleState.isGameActive,
+    compatibleState.style,
+    clientPosition,
+    localPlayerId,
+    viewerId,
+    sendMove,
+  ])
+
   // Keep lastLogRef for future debugging needs
   // (removed debug logging)
 

apps/web/src/arcade-games/complement-race/Validator.ts

@@ -97,6 +97,9 @@ export class ComplementRaceValidator
       case 'UPDATE_INPUT':
         return this.validateUpdateInput(state, move.playerId, move.data.input)
 
+      case 'UPDATE_POSITION':
+        return this.validateUpdatePosition(state, move.playerId, move.data.position)
+
       case 'CLAIM_PASSENGER':
         return this.validateClaimPassenger(
           state,
@@ -397,6 +400,39 @@ export class ComplementRaceValidator
     return { valid: true, newState }
   }
 
+  private validateUpdatePosition(
+    state: ComplementRaceState,
+    playerId: string,
+    position: number
+  ): ValidationResult {
+    if (state.gamePhase !== 'playing') {
+      return { valid: false, error: 'Game not in playing phase' }
+    }
+
+    const player = state.players[playerId]
+    if (!player) {
+      return { valid: false, error: 'Player not found' }
+    }
+
+    // Validate position is a reasonable number (0-100)
+    if (typeof position !== 'number' || position < 0 || position > 100) {
+      return { valid: false, error: 'Invalid position value' }
+    }
+
+    const newState: ComplementRaceState = {
+      ...state,
+      players: {
+        ...state.players,
+        [playerId]: {
+          ...player,
+          position,
+        },
+      },
+    }
+
+    return { valid: true, newState }
+  }
+
   // ==========================================================================
   // Sprint Mode: Passenger Management
   // ==========================================================================

apps/web/src/arcade-games/complement-race/types.ts

@@ -143,6 +143,7 @@ export type ComplementRaceMove = BaseGameMove &
     // Playing phase
     | { type: 'SUBMIT_ANSWER'; data: { answer: number; responseTime: number } }
     | { type: 'UPDATE_INPUT'; data: { input: string } } // Show "thinking" indicator
+    | { type: 'UPDATE_POSITION'; data: { position: number } } // Sprint mode: sync train position
     | { type: 'CLAIM_PASSENGER'; data: { passengerId: string; carIndex: number } } // Sprint mode: pickup
     | { type: 'DELIVER_PASSENGER'; data: { passengerId: string } } // Sprint mode: delivery
 

package.json

@@ -1,6 +1,6 @@
 {
   "name": "soroban-monorepo",
-  "version": "4.64.1",
+  "version": "4.65.1",
   "private": true,
   "description": "Beautiful Soroban Flashcard Generator - Monorepo",
   "workspaces": [