# User MCP Server - Resource Architecture

The user's MCP server container owns **all** conversation history, RAG, and contextual data. The platform gateway is a thin, stateless orchestrator that only holds the Anthropic API key.

## Architecture Principle

**User Container = Fat Context**
- Conversation history (PostgreSQL/SQLite)
- RAG system (embeddings, vector search)
- User preferences and custom prompts
- Trading context (positions, watchlists, alerts)
- All user-specific data

**Platform Gateway = Thin Orchestrator**
- Anthropic API key (platform pays for LLM)
- Session management (WebSocket/Telegram connections)
- MCP client connection pooling
- Tool routing (platform vs user tools)
- **Zero conversation state stored**

## MCP Resources for Context Injection

Resources are **read-only** data sources that provide context to the LLM. They're fetched before each Claude API call and embedded in the conversation.

### Standard Context Resources

#### 1. `context://user-profile`
**Purpose:** User's trading background and preferences

**MIME Type:** `text/plain`

**Example Content:**
```
User Profile:
- Trading experience: Intermediate
- Preferred timeframes: 1h, 4h, 1d
- Risk tolerance: Medium
- Focus: Swing trading with technical indicators
- Favorite indicators: RSI, MACD, Bollinger Bands
- Active pairs: BTC/USDT, ETH/USDT, SOL/USDT
```

**Implementation Notes:**
- Stored in user's database `user_preferences` table
- Updated via preference management tools
- Includes inferred data from usage patterns

---

#### 2. `context://conversation-summary`
**Purpose:** Semantic summary of recent conversation with RAG-enhanced context

**MIME Type:** `text/plain`

**Example Content:**
```
Recent Conversation Summary:

Last 10 messages (summarized):
- User asked about moving average crossover strategies
- Discussed backtesting parameters for BTC/USDT
- Reviewed risk management with 2% position sizing
- Explored adding RSI filter to reduce false signals

Relevant past discussions (RAG search):
- 2 weeks ago: Similar strategy development on ETH/USDT
- 1 month ago: User prefers simple strategies over complex ones
- Past preference: Avoid strategies with >5 indicators

Current focus: Optimizing MA crossover with momentum filter
```

**Implementation Notes:**
- Last N messages stored in `conversation_history` table
- RAG search against embeddings of past conversations
- Semantic search using user's current message as query
- ChromaDB/pgvector for embedding storage
- Summary generated on-demand (can be cached for 1-5 minutes)

**RAG Integration:**
```python
async def get_conversation_summary() -> str:
    # Get recent messages
    recent = await db.get_recent_messages(limit=50)

    # Semantic search for relevant context
    relevant = await rag.search_conversation_history(
        query=recent[-1].content,  # Last user message
        limit=5,
        min_score=0.7
    )

    # Build summary
    return build_summary(recent[-10:], relevant)
```

---

#### 3. `context://workspace-state`
**Purpose:** Current trading workspace (chart, positions, watchlist)

**MIME Type:** `application/json`

**Example Content:**
```json
{
  "currentChart": {
    "ticker": "BTC/USDT.BINANCE",
    "timeframe": "1h",
    "indicators": ["SMA(20)", "RSI(14)", "MACD(12,26,9)"]
  },
  "watchlist": ["BTC/USDT", "ETH/USDT", "SOL/USDT"],
  "openPositions": [
    {
      "ticker": "BTC/USDT",
      "side": "long",
      "size": 0.1,
      "entryPrice": 45000,
      "currentPrice": 46500,
      "unrealizedPnL": 150
    }
  ],
  "recentAlerts": [
    {
      "type": "price_alert",
      "message": "BTC/USDT crossed above $46,000",
      "timestamp": "2025-01-15T10:30:00Z"
    }
  ]
}
```

**Implementation Notes:**
- Synced from web client chart state
- Updated via WebSocket sync protocol
- Includes active indicators on current chart
- Position data from trading system

---

#### 4. `context://system-prompt`
**Purpose:** User's custom instructions and preferences for AI behavior

**MIME Type:** `text/plain`

**Example Content:**
```
Custom Instructions:
- Be concise and data-driven
- Always show risk/reward ratios
- Prefer simple strategies over complex ones
- When suggesting trades, include stop-loss and take-profit levels
- Explain your reasoning in trading decisions
```

**Implementation Notes:**
- User-editable in preferences UI
- Appended **last** to system prompt (highest priority)
- Can override platform defaults
- Stored in `user_preferences.custom_prompt` field

---

## MCP Tools for Actions

Tools are for **actions** that have side effects. These are **not** used for context fetching.

### Conversation Management
- `save_message(role, content, timestamp)` - Save message to history
- `search_conversation(query, limit)` - Explicit semantic search (for user queries like "what did we discuss about BTC?")

### Strategy & Indicators
- `list_strategies()` - List user's strategies
- `read_strategy(name)` - Get strategy code
- `write_strategy(name, code)` - Save strategy
- `run_backtest(strategy, params)` - Execute backtest

### Trading
- `get_watchlist()` - Get watchlist (action that may trigger sync)
- `execute_trade(params)` - Execute trade order
- `get_positions()` - Fetch current positions from exchange

### Sandbox
- `run_python(code)` - Execute Python code with data science libraries

---

## Gateway Harness Flow

```typescript
// gateway/src/harness/agent-harness.ts

async handleMessage(message: InboundMessage): Promise<OutboundMessage> {
  // 1. Fetch context resources from user's MCP
  const contextResources = await fetchContextResources([
    'context://user-profile',
    'context://conversation-summary',  // <-- RAG happens here
    'context://workspace-state',
    'context://system-prompt',
  ]);

  // 2. Build system prompt from resources
  const systemPrompt = buildSystemPrompt(contextResources);

  // 3. Build messages with embedded conversation context
  const messages = buildMessages(message, contextResources);

  // 4. Get tools from MCP
  const tools = await mcpClient.listTools();

  // 5. Call Claude with embedded context
  const response = await anthropic.messages.create({
    model: 'claude-sonnet-4-6',
    system: systemPrompt,  // <-- User profile + workspace + custom prompt
    messages,              // <-- Conversation summary from RAG
    tools,
  });

  // 6. Save to user's MCP (tool call)
  await mcpClient.callTool('save_message', { role: 'user', content: message.content });
  await mcpClient.callTool('save_message', { role: 'assistant', content: response });

  return response;
}
```

---

## User MCP Server Implementation (Python)

### Resource Handler

```python
# user-mcp/src/resources.py

from mcp.server import Server
from mcp.types import Resource, ResourceTemplate
import asyncpg

server = Server("dexorder-user")

@server.list_resources()
async def list_resources() -> list[Resource]:
    return [
        Resource(
            uri="context://user-profile",
            name="User Profile",
            description="Trading style, preferences, and background",
            mimeType="text/plain",
        ),
        Resource(
            uri="context://conversation-summary",
            name="Conversation Summary",
            description="Recent conversation with RAG-enhanced context",
            mimeType="text/plain",
        ),
        Resource(
            uri="context://workspace-state",
            name="Workspace State",
            description="Current chart, watchlist, positions",
            mimeType="application/json",
        ),
        Resource(
            uri="context://system-prompt",
            name="Custom System Prompt",
            description="User's custom AI instructions",
            mimeType="text/plain",
        ),
    ]

@server.read_resource()
async def read_resource(uri: str) -> str:
    if uri == "context://user-profile":
        return await build_user_profile()
    elif uri == "context://conversation-summary":
        return await build_conversation_summary()
    elif uri == "context://workspace-state":
        return await build_workspace_state()
    elif uri == "context://system-prompt":
        return await get_custom_prompt()
    else:
        raise ValueError(f"Unknown resource: {uri}")
```

### RAG Integration

```python
# user-mcp/src/rag.py

import chromadb
from sentence_transformers import SentenceTransformer

class ConversationRAG:
    def __init__(self, db_path: str):
        self.chroma = chromadb.PersistentClient(path=db_path)
        self.collection = self.chroma.get_or_create_collection("conversations")
        self.embedder = SentenceTransformer('all-MiniLM-L6-v2')

    async def search_conversation_history(
        self,
        query: str,
        limit: int = 5,
        min_score: float = 0.7
    ) -> list[dict]:
        """Semantic search over conversation history"""
        # Embed query
        query_embedding = self.embedder.encode(query).tolist()

        # Search
        results = self.collection.query(
            query_embeddings=[query_embedding],
            n_results=limit,
        )

        # Filter by score and format
        relevant = []
        for i, score in enumerate(results['distances'][0]):
            if score >= min_score:
                relevant.append({
                    'content': results['documents'][0][i],
                    'metadata': results['metadatas'][0][i],
                    'score': score,
                })

        return relevant

    async def add_message(self, message_id: str, role: str, content: str, metadata: dict):
        """Add message to RAG index"""
        embedding = self.embedder.encode(content).tolist()

        self.collection.add(
            ids=[message_id],
            embeddings=[embedding],
            documents=[content],
            metadatas=[{
                'role': role,
                'timestamp': metadata.get('timestamp'),
                **metadata
            }]
        )
```

### Conversation Summary Builder

```python
# user-mcp/src/context.py

async def build_conversation_summary(user_id: str) -> str:
    """Build conversation summary with RAG"""
    # 1. Get recent messages
    recent_messages = await db.get_messages(
        user_id=user_id,
        limit=50,
        order='desc'
    )

    # 2. Get current focus (last user message)
    last_user_msg = next(
        (m for m in recent_messages if m.role == 'user'),
        None
    )

    if not last_user_msg:
        return "No recent conversation history."

    # 3. RAG search for relevant context
    rag = ConversationRAG(f"/data/users/{user_id}/rag")
    relevant_context = await rag.search_conversation_history(
        query=last_user_msg.content,
        limit=5,
        min_score=0.7
    )

    # 4. Build summary
    summary = f"Recent Conversation Summary:\n\n"

    # Recent messages (last 10)
    summary += "Last 10 messages:\n"
    for msg in recent_messages[-10:]:
        summary += f"- {msg.role}: {msg.content[:100]}...\n"

    # Relevant past context
    if relevant_context:
        summary += "\nRelevant past discussions (RAG):\n"
        for ctx in relevant_context:
            timestamp = ctx['metadata'].get('timestamp', 'unknown')
            summary += f"- [{timestamp}] {ctx['content'][:150]}...\n"

    # Inferred focus
    summary += f"\nCurrent focus: {infer_topic(last_user_msg.content)}\n"

    return summary

def infer_topic(message: str) -> str:
    """Simple topic extraction"""
    keywords = {
        'strategy': ['strategy', 'backtest', 'trading system'],
        'indicator': ['indicator', 'rsi', 'macd', 'moving average'],
        'analysis': ['analyze', 'chart', 'price action'],
        'risk': ['risk', 'position size', 'stop loss'],
    }

    message_lower = message.lower()
    for topic, words in keywords.items():
        if any(word in message_lower for word in words):
            return topic

    return 'general trading discussion'
```

---

## Benefits of This Architecture

1. **Privacy**: Conversation history never leaves user's container
2. **Customization**: Each user controls their RAG, embeddings, prompt engineering
3. **Scalability**: Platform harness is stateless - horizontally scalable
4. **Cost Control**: Platform pays for Claude, users pay for their compute/storage
5. **Portability**: Users can export/migrate their entire context
6. **Development**: Users can test prompts/context locally without platform involvement

---

## Future Enhancements

### Dynamic Resource URIs

Support parameterized resources:
```
context://conversation/{session_id}
context://strategy/{strategy_name}
context://backtest/{backtest_id}/results
```

### Resource Templates

MCP supports resource templates for dynamic discovery:
```python
@server.list_resource_templates()
async def list_templates() -> list[ResourceTemplate]:
    return [
        ResourceTemplate(
            uriTemplate="context://strategy/{name}",
            name="Strategy Context",
            description="Context for specific strategy",
        )
    ]
```

### Streaming Resources

For large context (e.g., full backtest results), support streaming:
```python
@server.read_resource()
async def read_resource(uri: str) -> AsyncIterator[str]:
    if uri.startswith("context://backtest/"):
        async for chunk in stream_backtest_results(uri):
            yield chunk
```

---

## Migration Path

For users with existing conversation history in platform DB:

1. **Export script**: Migrate platform history → user container DB
2. **RAG indexing**: Embed all historical messages into ChromaDB
3. **Preference migration**: Copy user preferences to container
4. **Cutover**: Switch to resource-based context fetching

Platform can keep read-only archive for compliance, but active context lives in user container.
