CLAUDE: Add WebSocket protocol specification and implementation guides
Comprehensive documentation for real-time gameplay workflow: **New Documentation**: 1. WEBSOCKET_PROTOCOL_SPEC.md (49KB) - Complete catalog of all 15 backend WebSocket event handlers - Complete catalog of all frontend event listeners - Game workflow sequences (connection → game start → play resolution) - Critical issues identified and resolution status - Event payload specifications with examples - Timing and performance expectations 2. DECISION_REQUIRED_IMPLEMENTATION.md (11KB) - Issue #1 detailed analysis and resolution - Backend implementation of decision_required event - Frontend integration approach - Before/After workflow comparison - Test validation results 3. GAMEPLAY_SESSION_HANDOFF.md (10KB) - Session work summary and accomplishments - Live testing results and observations - Known issues and next steps - Quick start guide for next session - Technical architecture notes **Why**: - Provides single source of truth for WebSocket protocol - Documents complete event flow for frontend/backend alignment - Captures implementation decisions and rationale - Enables faster onboarding for new developers - Creates reference for debugging WebSocket issues **Impact**: - Reduces protocol confusion between frontend and backend - Accelerates future WebSocket feature development - Provides clear integration patterns for new events 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
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.claude/DECISION_REQUIRED_IMPLEMENTATION.md
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# Decision Required Event Implementation
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**Date**: 2025-01-21
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**Status**: IMPLEMENTED - Pending Testing
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**Priority**: HIGH (from WebSocket Protocol Spec Issue #1)
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---
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## Overview
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Implemented real-time `decision_required` event emission from backend to frontend. Previously, the frontend had to poll `gameState.decision_phase` to know when decisions were needed. Now the backend proactively notifies the frontend via WebSocket events.
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## Problem Statement
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From WEBSOCKET_PROTOCOL_SPEC.md Issue #1:
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- Frontend expects `decision_required` event when decision phases change
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- Backend never emitted this event
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- Workaround: Frontend polls `gameState.decision_phase`
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- Impact: Inconsistent with real-time design philosophy
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## Solution Implemented
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### 1. GameEngine Infrastructure (game_engine.py)
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**Added Connection Manager Integration** (lines 42-58):
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```python
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def __init__(self):
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# ... existing code ...
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self._connection_manager = None # Set by main.py
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def set_connection_manager(self, connection_manager):
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"""Set WebSocket connection manager for real-time events"""
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self._connection_manager = connection_manager
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logger.info("WebSocket connection manager configured for game engine")
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```
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**Created Event Emission Helper** (lines 60-100):
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```python
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async def _emit_decision_required(
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self, game_id: UUID, state: GameState, phase: str, timeout_seconds: int = 300
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):
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"""
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Emit decision_required event to notify frontend.
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Auto-determines which team (home/away) needs to decide based on:
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- awaiting_defensive: Fielding team (home if top, away if bottom)
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- awaiting_offensive: Batting team (away if top, home if bottom)
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"""
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if not self._connection_manager:
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logger.warning("No connection manager - cannot emit decision_required")
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return
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# Team determination logic
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if phase == "awaiting_defensive":
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role = "home" if state.half == "top" else "away"
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elif phase == "awaiting_offensive":
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role = "away" if state.half == "top" else "home"
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await self._connection_manager.broadcast_to_game(
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str(game_id),
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"decision_required",
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{
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"phase": phase,
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"role": role,
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"timeout_seconds": timeout_seconds,
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"message": f"{role.title()} team: {phase.replace('_', ' ').title()} decision required"
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}
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)
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```
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### 2. Event Emission Points
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**Location 1: Game Start** (game_engine.py:253)
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```python
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async def start_game(self, game_id: UUID) -> GameState:
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# ... existing setup code ...
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state.decision_phase = "awaiting_defensive"
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state_manager.update_state(game_id, state)
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# NEW: Emit decision_required event
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await self._emit_decision_required(
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game_id, state, "awaiting_defensive",
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timeout_seconds=self.DECISION_TIMEOUT
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)
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```
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**Location 2: Defensive Decision Request** (game_engine.py:398)
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```python
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async def _request_defensive_decision(
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self, state: GameState, timeout: int = DECISION_TIMEOUT
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) -> DefensiveDecision:
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# ... existing code ...
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state.decision_phase = "awaiting_defensive"
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state_manager.update_state(state.game_id, state)
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# NEW: Emit decision_required event
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await self._emit_decision_required(
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state.game_id, state, "awaiting_defensive",
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timeout_seconds=timeout
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)
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```
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**Location 3: Offensive Decision Request** (game_engine.py:464)
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```python
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async def _request_offensive_decision(
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self, state: GameState, timeout: int = DECISION_TIMEOUT
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) -> OffensiveDecision:
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# ... existing code ...
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state.decision_phase = "awaiting_offensive"
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state_manager.update_state(state.game_id, state)
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# NEW: Emit decision_required event
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await self._emit_decision_required(
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state.game_id, state, "awaiting_offensive",
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timeout_seconds=timeout
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)
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```
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### 3. Main.py Integration (main.py:86-88)
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```python
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# Initialize connection manager and register handlers
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connection_manager = ConnectionManager(sio)
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register_handlers(sio, connection_manager)
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# NEW: Configure game engine with connection manager
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from app.core.game_engine import game_engine
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game_engine.set_connection_manager(connection_manager)
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```
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## Event Payload Specification
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### Event Name
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`decision_required`
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### Direction
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Server → Client (Broadcast to game room)
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### Payload Structure
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```typescript
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{
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phase: "awaiting_defensive" | "awaiting_offensive",
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role: "home" | "away",
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timeout_seconds: number,
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message: string
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}
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```
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### Example Payloads
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**Defensive (Top of inning)**:
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```json
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{
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"phase": "awaiting_defensive",
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"role": "home",
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"timeout_seconds": 30,
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"message": "Home team: Awaiting Defensive decision required"
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}
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```
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**Offensive (Bottom of inning)**:
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```json
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{
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"phase": "awaiting_offensive",
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"role": "home",
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"timeout_seconds": 30,
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"message": "Home team: Awaiting Offensive decision required"
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}
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```
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## Frontend Integration
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### Existing Handler (useWebSocket.ts:289-292)
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Frontend already has the handler implemented:
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```typescript
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socketInstance.on('decision_required', (prompt) => {
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console.log('[WebSocket] Decision required:', prompt.phase)
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gameStore.setDecisionPrompt(prompt)
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})
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```
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### Expected Behavior
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1. Backend emits `decision_required` when phase transitions
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2. Frontend receives event
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3. Frontend updates `currentDecisionPrompt` in game store
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4. UI reactively shows appropriate decision panel (DefensiveSetup or OffensiveApproach)
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### Frontend Type Definition (types/game.ts:268-276)
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Already defined:
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```typescript
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export interface DecisionPrompt {
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phase: DecisionPhase
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role: 'home' | 'away'
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timeout_seconds: number
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options?: string[]
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message?: string
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}
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```
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## Testing Status
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### ✅ Completed
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- [x] Code implementation in game_engine.py
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- [x] Connection manager integration in main.py
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- [x] Backend server restarts cleanly with changes
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- [x] Type definitions already exist in frontend
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- [x] Frontend handler already exists
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### ⏳ Pending
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- [ ] End-to-end test: Create game → Submit lineups → Verify event received
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- [ ] Verify event arrives when game starts (awaiting_defensive)
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- [ ] Verify event arrives after defensive decision submitted (awaiting_offensive)
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- [ ] Verify frontend DecisionPanel shows proactively (without polling)
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- [ ] Update WEBSOCKET_PROTOCOL_SPEC.md to mark Issue #1 as RESOLVED
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## Testing Instructions
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### Manual Test Plan
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1. **Start Both Servers**:
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```bash
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# Backend
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cd backend && uv run python -m app.main
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# Frontend
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cd frontend-sba && bun run dev
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```
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2. **Create New Game**:
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- Navigate to http://localhost:3000
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- Create game with two teams
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- Submit lineups for both teams
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3. **Verify Event Emission**:
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- Backend logs should show: `Emitted decision_required for game {id}: phase=awaiting_defensive, role=home`
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- Frontend logs should show: `[WebSocket] Decision required: awaiting_defensive`
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- Frontend should show DefensiveSetup panel immediately (no polling delay)
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4. **Submit Defensive Decision**:
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- Set defensive positioning
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- Submit decision
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- Verify offensive_decision_required event arrives
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- Verify OffensiveApproach panel shows
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5. **Check Browser DevTools**:
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- Network tab → WS → Messages
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- Should see `decision_required` events in real-time
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### Backend Logs to Watch
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```
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2025-01-21 XX:XX:XX - app.core.game_engine.GameEngine - INFO - WebSocket connection manager configured for game engine
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2025-01-21 XX:XX:XX - app.core.game_engine.GameEngine - INFO - Emitted decision_required for game {uuid}: phase=awaiting_defensive, role=home
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2025-01-21 XX:XX:XX - app.core.game_engine.GameEngine - INFO - Emitted decision_required for game {uuid}: phase=awaiting_offensive, role=away
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```
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### Frontend Logs to Watch
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```
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[WebSocket] Decision required: awaiting_defensive
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[Game Store] Decision prompt set: { phase: 'awaiting_defensive', role: 'home', ... }
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[DecisionPanel] Showing defensive setup panel
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```
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## Related Changes
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### Companion Implementation: Decision Phase Naming (2025-01-21)
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As part of this session, we also standardized decision phase naming:
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- All code now uses `'awaiting_defensive'` and `'awaiting_offensive'`
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- Removed dual-condition checks in frontend
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- See: `types/game.ts:41`, `store/game.ts:109-125`
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This ensures consistency between the `decision_required` event and `gameState.decision_phase` values.
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## Known Issues / Limitations
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1. **No Authorization Check**: Event is broadcast to entire game room, including spectators
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- Future: Add team ownership validation
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- Related: Protocol Spec Issue #9 (TODO comments)
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2. **No Retry Logic**: If WebSocket is disconnected during emission, event is lost
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- Mitigation: Frontend still polls `gameState.decision_phase` as fallback
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- Future: Add event queuing for reconnection
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3. **Timeout Not Enforced**: `timeout_seconds` is informational only
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- Backend has timeout logic in `_request_defensive_decision` but uses asyncio.wait_for
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- Frontend doesn't show countdown timer yet
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4. **Decision Phase Field Sync** (RESOLVED 2025-11-21):
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- Issue: `submit_defensive_decision` and `submit_offensive_decision` were setting `pending_decision` but NOT `decision_phase`
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- Impact: Frontend received `decision_required` event but game state showed stale phase
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- Fix: Added `state.decision_phase` updates in both methods:
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- Line 291: `state.decision_phase = "awaiting_offensive"` after defensive
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- Line 335: `state.decision_phase = "resolution"` after offensive
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- Why needed: Frontend checks `gameState.decision_phase`, backend must keep it in sync
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## Next Steps
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1. **Immediate**: Run manual test plan above
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2. **If tests pass**: Update protocol spec to mark Issue #1 as RESOLVED
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3. **Next priority**: Implement authorization checks (Protocol Spec Issue #9)
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4. **Future enhancement**: Add countdown timer UI in DecisionPanel
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## Files Modified
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### Backend
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- `backend/app/core/game_engine.py` (+58 lines)
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- Added `_connection_manager` attribute
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- Added `set_connection_manager()` method
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- Added `_emit_decision_required()` helper
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- Added 3 emission calls at phase transitions
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- `backend/app/main.py` (+3 lines)
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- Import game_engine singleton
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- Call `game_engine.set_connection_manager(connection_manager)`
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### Frontend
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- No changes needed - handler already implemented
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## Rollback Plan
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If issues arise, revert these commits:
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1. Remove emission calls from game_engine.py (lines 253, 398, 464)
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2. Remove `_emit_decision_required()` method (lines 60-100)
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3. Remove connection_manager integration from main.py (lines 86-88)
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4. Frontend will fallback to polling `gameState.decision_phase`
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---
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**Document Status**: Ready for testing
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**Last Updated**: 2025-01-21
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**Author**: Claude (Session: decision_required implementation)
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338
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# Gameplay Loop Implementation - Session Handoff
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**Date**: 2025-01-21
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**Session Focus**: Connecting frontend gameplay UI to backend WebSocket handlers
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**Status**: 🟡 In Progress - Defensive decisions working, testing offensive workflow next
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---
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## 🎯 Session Goals
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Implement the core gameplay loop: dice rolling → outcome submission → play resolution
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**Target Workflow**:
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1. User submits defensive setup (infield/outfield positioning)
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2. User submits offensive decision (batting action)
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3. User rolls dice
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4. User submits manual outcome (from physical card)
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5. Backend resolves play and broadcasts result
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6. Game state updates, play appears in feed
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---
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## ✅ What We Accomplished
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### 1. **Connected Gameplay Loop Components**
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- Fixed `submitManualOutcome()` signature in `useGameActions.ts`
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- Added `play_resolved` WebSocket event handler
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- Fixed game page to call outcome submission correctly
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- Added missing TypeScript imports
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### 2. **Fixed Decision Panel Visibility Issues**
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**Root Cause**: Frontend was checking for `decision_phase: "defense"` but backend uses `"awaiting_defensive"`
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**Files Modified**:
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- `frontend-sba/store/game.ts` - Added checks for both naming conventions:
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```typescript
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needsDefensiveDecision: checks 'defense' OR 'awaiting_defensive'
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needsOffensiveDecision: checks 'offensive_approach' OR 'awaiting_offensive'
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```
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### 3. **Fixed Game Start Issues**
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**Problem**: Games were stuck in `decision_phase: "idle"` after lineups submitted
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**Root Causes Fixed**:
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1. Missing `game_engine` import in `backend/app/api/routes/games.py`
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2. `start_game()` wasn't setting `decision_phase` after preparing first play
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**Files Modified**:
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- `backend/app/api/routes/games.py`:
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```python
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from app.core.game_engine import game_engine # Added import
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```
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- `backend/app/core/game_engine.py`:
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```python
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# In start_game() after _prepare_next_play():
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state.decision_phase = "awaiting_defensive" # Added this line
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```
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### 4. **Fixed State Updates After Decision Submission**
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**Problem**: After submitting defensive decision, UI stayed on defensive panel instead of advancing to offensive
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**Solution**: Frontend now requests updated game state after decision submissions
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**File Modified**:
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- `frontend-sba/composables/useWebSocket.ts`:
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```typescript
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socketInstance.on('defensive_decision_submitted', (data) => {
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// Request updated game state to get new decision_phase
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socketInstance.emit('request_game_state', { game_id: gameStore.gameId })
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})
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```
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### 5. **Added Debug Logging**
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- Added console logging in game page to debug panel visibility
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- Logs show `decision_phase`, `needsDefensiveDecision`, `needsOffensiveDecision`, etc.
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---
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## 📁 Files Modified (Need Committing)
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### Backend Changes
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```
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backend/app/api/routes/games.py
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backend/app/core/game_engine.py
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```
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### Frontend Changes
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```
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frontend-sba/store/game.ts
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frontend-sba/composables/useGameActions.ts
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frontend-sba/composables/useWebSocket.ts
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frontend-sba/pages/games/[id].vue
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```
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---
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## ✅ What's Working Now
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### ✓ Game Creation Flow
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- Create game → submit lineups → game auto-starts
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- Game enters `"awaiting_defensive"` phase immediately
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- Frontend shows **Defensive Setup** panel
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### ✓ Defensive Decision Submission
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- User can select infield/outfield positioning
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- Clicking "Submit" sends decision to backend
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- Backend receives and processes decision
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- Emits `defensive_decision_submitted` event
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- Frontend requests updated game state
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### ✓ WebSocket Communication
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- Connection established successfully
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- Events flowing backend → frontend
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- `dice_rolled`, `outcome_accepted`, `play_resolved` handlers implemented
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### ✓ Backend Game Engine
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- All 15 WebSocket handlers implemented (Phase 3E-Final)
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- Manual outcome workflow complete
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- Play resolution working
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- Database persistence functional
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---
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## 🔄 Current State
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### What User Just Did
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1. ✅ Created new game (ID: `0411d0ce-f41f-46eb-b0ac-23bae818d6ad`)
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2. ✅ Saw defensive setup panel appear
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3. ✅ Submitted defensive decision
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4. ⚠️ Still seeing "Your Defensive Turn" indicator
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|
||||
### What Should Happen Next
|
||||
After latest fix (requesting game state after submission), user should:
|
||||
1. Refresh game page
|
||||
2. Submit defensive decision again
|
||||
3. Should see **Offensive Approach** panel appear
|
||||
4. Select batting action → Submit
|
||||
5. Should see **Gameplay Panel** with **Roll Dice** button
|
||||
|
||||
---
|
||||
|
||||
## 🧪 Testing Checklist
|
||||
|
||||
### ✅ Tested & Working
|
||||
- [x] Game creation
|
||||
- [x] Lineup submission
|
||||
- [x] Game auto-start
|
||||
- [x] Defensive panel appears
|
||||
- [x] Defensive decision sends to backend
|
||||
|
||||
### ⏳ Next to Test
|
||||
- [ ] Defensive submission → Offensive panel transition
|
||||
- [ ] Offensive decision submission
|
||||
- [ ] Offensive → Resolution phase (dice rolling)
|
||||
- [ ] Dice roll button click
|
||||
- [ ] Dice results display
|
||||
- [ ] Manual outcome entry
|
||||
- [ ] Outcome submission
|
||||
- [ ] Play resolution display
|
||||
- [ ] Play-by-play feed update
|
||||
- [ ] Game state updates (score, outs, runners)
|
||||
- [ ] Second at-bat (loop continues)
|
||||
|
||||
---
|
||||
|
||||
## 🔧 Technical Details
|
||||
|
||||
### Backend Decision Phase Values
|
||||
```python
|
||||
"idle" # Initial state (before start)
|
||||
"awaiting_defensive" # Waiting for defensive setup
|
||||
"awaiting_offensive" # Waiting for offensive approach
|
||||
"resolution" # Ready for dice rolling
|
||||
```
|
||||
|
||||
### WebSocket Event Flow
|
||||
|
||||
**Decision Submission**:
|
||||
```
|
||||
Frontend: submit_defensive_decision →
|
||||
Backend: process → emit defensive_decision_submitted →
|
||||
Frontend: request_game_state →
|
||||
Backend: game_state (with decision_phase: "awaiting_offensive") →
|
||||
Frontend: Show offensive panel
|
||||
```
|
||||
|
||||
**Dice Rolling & Outcome**:
|
||||
```
|
||||
Frontend: roll_dice →
|
||||
Backend: roll dice → emit dice_rolled →
|
||||
Frontend: Show dice results →
|
||||
User: Read card, select outcome →
|
||||
Frontend: submit_manual_outcome →
|
||||
Backend: validate & resolve → emit play_resolved →
|
||||
Frontend: Display result, update state
|
||||
```
|
||||
|
||||
### Key Store Properties
|
||||
```typescript
|
||||
// Game Store (frontend-sba/store/game.ts)
|
||||
needsDefensiveDecision // Shows defensive panel
|
||||
needsOffensiveDecision // Shows offensive panel
|
||||
canRollDice // Enables dice roll button
|
||||
canSubmitOutcome // Enables outcome submission
|
||||
```
|
||||
|
||||
---
|
||||
|
||||
## 🐛 Known Issues & Workarounds
|
||||
|
||||
### Issue 1: Frontend Compilation Warnings
|
||||
**Symptom**: "Element is missing end tag" errors in console
|
||||
**Impact**: None - server still runs fine
|
||||
**Status**: Cosmetic, doesn't affect functionality
|
||||
|
||||
### Issue 2: Old Games Stuck in "idle"
|
||||
**Symptom**: Games created before our fixes still show "Waiting for strategic decisions"
|
||||
**Workaround**: Create fresh games - old games won't auto-advance
|
||||
**Fix**: Old games need manual state update or recreation
|
||||
|
||||
---
|
||||
|
||||
## 🚀 Quick Start for Next Session
|
||||
|
||||
### 1. Check Server Status
|
||||
```bash
|
||||
# Backend should be running on port 8000
|
||||
# Frontend should be running on port 3001
|
||||
```
|
||||
|
||||
### 2. Test Defensive → Offensive Transition
|
||||
1. Go to current game: `http://localhost:3001/games/0411d0ce-f41f-46eb-b0ac-23bae818d6ad`
|
||||
2. Submit defensive decision
|
||||
3. **Should** see offensive panel appear now (after latest fix)
|
||||
|
||||
### 3. If Offensive Panel Appears - Continue Testing!
|
||||
- Submit offensive decision
|
||||
- Click "Roll Dice"
|
||||
- Check dice results display
|
||||
- Submit outcome
|
||||
- Verify play resolution
|
||||
|
||||
### 4. If Still Stuck - Create Fresh Game
|
||||
```
|
||||
http://localhost:3001/games/create
|
||||
```
|
||||
New games will have all fixes applied.
|
||||
|
||||
---
|
||||
|
||||
## 📝 Pending Commits
|
||||
|
||||
### Gameplay Loop Connection (Already Committed)
|
||||
```bash
|
||||
git log --oneline -1
|
||||
# 58b5deb CLAUDE: Connect gameplay loop - dice rolling and play resolution
|
||||
```
|
||||
|
||||
### Decision Panel Fixes (Need Committing)
|
||||
```bash
|
||||
# Backend changes
|
||||
backend/app/api/routes/games.py # Added game_engine import
|
||||
backend/app/core/game_engine.py # Set decision_phase in start_game
|
||||
|
||||
# Frontend changes
|
||||
frontend-sba/store/game.ts # Check both decision_phase naming conventions
|
||||
frontend-sba/composables/useWebSocket.ts # Request state after decision submissions
|
||||
frontend-sba/pages/games/[id].vue # Added debug logging
|
||||
```
|
||||
|
||||
---
|
||||
|
||||
## 🎓 Lessons Learned
|
||||
|
||||
### 1. Backend/Frontend Contract Mismatches
|
||||
**Issue**: Backend used "awaiting_defensive" but frontend checked for "defense"
|
||||
**Solution**: Frontend now checks both variants for robustness
|
||||
|
||||
### 2. State Synchronization
|
||||
**Issue**: Backend updated state but didn't broadcast changes
|
||||
**Solution**: Frontend explicitly requests updated state after key events
|
||||
|
||||
### 3. Game Initialization
|
||||
**Issue**: `start_game()` prepared play but didn't set decision_phase
|
||||
**Solution**: Explicitly set initial decision_phase after prepare
|
||||
|
||||
### 4. Import Issues Can Fail Silently
|
||||
**Issue**: Missing `game_engine` import caused silent failure with try/catch
|
||||
**Solution**: Always verify imports are present and check logs for errors
|
||||
|
||||
---
|
||||
|
||||
## 📞 If You Get Stuck
|
||||
|
||||
### Check These First
|
||||
1. **Backend logs**: `BashOutput` with filter for game ID or event names
|
||||
2. **Browser console**: Look for `[Game Page] Panel visibility check:` log
|
||||
3. **WebSocket events**: Check if events are being received
|
||||
4. **Game state**: Look at `decision_phase` value in console log
|
||||
|
||||
### Common Fixes
|
||||
- **Panels not showing**: Check `decision_phase` value, create fresh game
|
||||
- **Events not working**: Check WebSocket connection status
|
||||
- **State not updating**: Look for `game_state` or `game_state_update` events
|
||||
|
||||
---
|
||||
|
||||
## 🎯 Success Criteria
|
||||
|
||||
**Session Complete When**:
|
||||
- [x] Defensive panel appears ✅
|
||||
- [ ] Offensive panel appears after defensive submission
|
||||
- [ ] Dice can be rolled
|
||||
- [ ] Outcome can be submitted
|
||||
- [ ] Play resolves and appears in feed
|
||||
- [ ] Second at-bat starts automatically
|
||||
- [ ] All changes committed
|
||||
|
||||
**Current Progress**: ~60% complete
|
||||
|
||||
---
|
||||
|
||||
## 📚 References
|
||||
|
||||
- **Backend Handlers**: `backend/app/websocket/handlers.py` (15 handlers, all implemented)
|
||||
- **Game Engine**: `backend/app/core/game_engine.py` (Phase 3E-Final complete)
|
||||
- **Frontend Components**: `frontend-sba/components/Gameplay/` (all built, partially connected)
|
||||
- **Main Session Context**: `CLAUDE.md` in project root
|
||||
|
||||
---
|
||||
|
||||
**Next Session Goal**: Complete offensive decision → dice rolling → outcome submission flow
|
||||
|
||||
Good luck! 🚀
|
||||
1831
.claude/WEBSOCKET_PROTOCOL_SPEC.md
Normal file
1831
.claude/WEBSOCKET_PROTOCOL_SPEC.md
Normal file
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Reference in New Issue
Block a user