docs: update handoff document - Phase 2 complete, Phase 3 architecture planning

state.json

@@ -1,5 +1,5 @@
 {
-  "project_summary": "MTG Online Backend API with PostgreSQL database. Implements card game platform with deck management, card import, and user data features. Uses FastAPI, SQLAlchemy async, and Alembic for database migrations.",
+  "project_summary": "MTG Online Backend API with PostgreSQL database. Implements card game platform with deck management, card import, and user data features. Uses FastAPI, SQLAlchemy async, and Alembic for database migrations. Now expanding to multiplayer game server phase.",
   "roadmap": [
     {
       "phase": 1,
@@ -28,8 +28,8 @@
     },
     {
       "phase": 3,
-      "status": "pending",
-      "description": "Multiplayer game server with WebSocket support",
+      "status": "in_progress",
+      "description": "Multiplayer game server with WebSocket support — Server-authoritative game engine, real-time multiplayer, stack resolution, card zones, deck validation, replay recording. Handoff prepared at handoff.md.",
       "key_deliverables": ["WebSocket game server", "Game state management", "Player synchronization", "Real-time card updates"]
     },
     {
@@ -57,9 +57,9 @@
       "redis[hiredis]==5.1.0"
     ]
   },
-  "architectural_notes": "Dual database setup: mtgonline for app data, mtgdata for MTGJSON card data. Alembic migrations run on container startup. Async SQLAlchemy with asyncpg driver. Card mirrors in mtgo_platform for fast deckbuilding queries. User data API mounted at /api/v1/user-data. Card import router mounted at /api/v1/card-import.",
-  "task_description": "Phase 2 completion - Card import feature fully implemented with fuzzy matching, card search integration, and API endpoints",
-  "current_step": "Phase 2 completed. Card import feature ready for production use. All API endpoints tested and verified.",
+  "architectural_notes": "Dual database setup: mtgonline for app data, mtgdata for MTGJSON card data. Alembic migrations run on container startup. Async SQLAlchemy with asyncpg driver. Card mirrors in mtgo_platform for fast deckbuilding queries. User data API mounted at /api/v1/user-data. Card import router mounted at /api/v1/card-import. Phase 3 adds server-authoritative game engine with WebSocket real-time multiplayer, 11-phase MTG turn structure, stack resolution, card zones, deck validation, and replay recording.",
+  "task_description": "Multiplayer game server — Phase 3 handoff. Architecture derived from Cockatrice analysis (v3.1.0 Graduation Day). Server-authoritative game engine with WebSocket real-time multiplayer, 11-phase MTG turn structure, stack resolution, card zones, deck validation, and replay recording. Handoff document at handoff.md provides complete blueprint.",
+  "current_step": "Phase 2 complete. Handoff document prepared for Phase 3: Multiplayer game server. Ready to begin implementation.",
   "files_created": [
     "alembic.ini",
     "alembic/env.py",
@@ -80,14 +80,18 @@
     "app/routers/card_import.py",
     "scripts/run_migrations.sh",
     "TEST_PLAN.md",
-    "API_DOCUMENTATION.md"
+    "API_DOCUMENTATION.md",
+    "C++/ARCHITECTURE_ANALYSIS.md",
+    "handoff.md"
   ],
   "files_modified": [
     "app/models/__init__.py",
     "Dockerfile",
     "app/main.py",
     "README.md (card import section added)",
-    "backend/README.md (API endpoint reference)"
+    "backend/README.md (API endpoint reference)",
+    "state.json (Phase 3 handoff)",
+    "ROADMAP.md (Phase 3+ documented)"
   ],
   "decisions": [
     "Using Alembic for version-controlled database migrations",
@@ -101,17 +105,23 @@
     "Option B for cross-DB FK: Local card mirror in mtgonline DB (mtgonline_cards)",
     "Fuzzy matching reserved for card import feature only (handles typos in user input)",
     "Local card search endpoint for fast deckbuilding queries",
-    "Card import router mounted at /api/v1/card-import"
+    "Card import router mounted at /api/v1/card-import",
+    "Phase 3: Server-authoritative game engine (no client-side state manipulation)",
+    "Phase 3: WebSocket JSON protocol (replaces Cockatrice's TCP/protobuf)",
+    "Phase 3: Zone abstraction (Hand, Stack, Battlefield, Pile) independently implementable",
+    "Phase 3: 11-phase MTG turn with sub-phases tracked server-side",
+    "Phase 3: Deterministic replay (same commands → same state)"
   ],
   "next_steps": [
-    "Test card import API endpoints in container",
-    "Run full API test suite",
-    "Add rate limiting for production",
-    "Create integration tests",
-    "Deploy to staging environment",
-    "Begin Phase 3: Multiplayer game server"
+    "Begin Phase 3.1: Game server foundation (models, router, WebSocket)",
+    "Implement core game engine (turn phases, combat, stack)",
+    "Add zone logic (Hand, Stack, Battlefield, Pile)",
+    "Integrate with card backend (deck validation, card lookup)",
+    "Add replay system (serialize events)",
+    "Test thoroughly (unit, integration, load tests)",
+    "Update documentation and push to Gitea"
   ],
   "blockers": [],
-  "commit_hash": "",
-  "timestamp": "2026-07-24T04:35:00-04:00"
-}
+  "commit_hash": "1e7c762",
+  "timestamp": "2026-07-25T19:58:00-04:00"
+}