phase 1

docs/architecture.md

@@ -422,8 +422,36 @@ else:
 
 ---
 
+---
+
+## Future Architecture: Multi-Platform Support
+
+The current architecture is Discord-centric. A **multi-platform expansion** is planned
+to support Web and CLI interfaces while maintaining one shared Living AI core.
+
+See [Multi-Platform Expansion](multi-platform-expansion.md) for the complete design.
+
+**Planned architecture:**
+
+```
+[ Discord Adapter ] ─┐
+[ Web Adapter ] ─────┼──▶ ConversationGateway ─▶ Living AI Core
+[ CLI Adapter ] ─────┘
+```
+
+**Key changes:**
+- Extract conversation logic into platform-agnostic `ConversationGateway`
+- Add `Platform` enum (DISCORD, WEB, CLI)
+- Add `IntimacyLevel` system for behavior modulation
+- Refactor `ai_chat.py` to use gateway
+- Add FastAPI web backend
+- Add Typer CLI client
+
+---
+
 ## Next Steps
 
+- [Multi-Platform Expansion](multi-platform-expansion.md) - Web & CLI platform design
 - [Living AI System](living-ai/README.md) - Deep dive into the personality system
 - [Services Reference](services/README.md) - Detailed API documentation
 - [Database Schema](database.md) - Complete schema documentation