Letta MCP Server

# Letta MCP Server - Coverage Summary

**Date:** 2025-10-18
**SDK Version:** v0.1.3 (commit: a901dc65)
**Framework:** TurboMCP v2.0.0-rc.3

---

## Quick Status

| Component | Status | Coverage | Notes |
|-----------|--------|----------|-------|
| **SDK Integration** | ✅ Complete | 91% (79/87) | All critical endpoints ready |
| **Tool Handlers** | 🟡 In Progress | 7% (6/87 ops) | Only agent_advanced partial |
| **HTTP Transport** | ❌ Not Started | 0% | Needs TurboMCP port |
| **Testing** | ❌ Not Started | 0% | Awaiting tool completion |

---

## Tool Implementation Status

### ✅ Partial (1 tool)
```
letta_agent_advanced: 6/22 operations (27%)
├─ ✅ create_agent
├─ ✅ get_agent
├─ ✅ list_agents
├─ ✅ delete_agent
├─ ✅ attach_tools
├─ ✅ detach_tools
└─ ❌ 16 operations pending (update, messages, memory, etc.)
```

### ❌ Not Started (6 tools)
```
letta_file_folder_ops:   0/8  operations (SDK: 8/8   ✅ 100%)
letta_memory_unified:    0/15 operations (SDK: 14/15 ✅ 93%)
letta_tool_manager:      0/13 operations (SDK: ~10/13 ⚠️ 77%)
letta_source_manager:    0/15 operations (SDK: 13/15 ✅ 87%)
letta_job_monitor:       0/4  operations (SDK: ~3/4  ⚠️ 75%)
letta_mcp_ops:           0/10 operations (SDK: 0/10  ❌ Custom)
```

---

## Implementation Priority

### 🔴 **Phase 1: Critical (Week 1)**
**Focus:** Core agent and file operations

1. **letta_file_folder_ops** (8 operations)
   - **Effort:** 1 day
   - **SDK Ready:** ✅ Yes (100%)
   - **Why Critical:** File management fundamental feature
   - **Files to Create:**
     - `letta-server/src/tools/file_folder_ops.rs`

2. **Complete letta_agent_advanced** (16 operations remaining)
   - **Effort:** 2-3 days
   - **SDK Ready:** ✅ Mostly (14/16 confirmed)
   - **Why Critical:** Agent management is core functionality
   - **Files to Modify:**
     - `letta-server/src/tools/agent_advanced.rs`

**Total Operations:** 24 operations (28% of total)
**Total Time:** 3-4 days

---

### 🟠 **Phase 2: Core Features (Week 2)**
**Focus:** Memory and tool management

3. **letta_memory_unified** (15 operations)
   - **Effort:** 2 days
   - **SDK Ready:** ✅ Yes (93%)
   - **Why Important:** Memory is core to agent functionality
   - **Files to Create:**
     - `letta-server/src/tools/memory_unified.rs`

4. **letta_tool_manager** (13 operations)
   - **Effort:** 2-3 days
   - **SDK Ready:** ⚠️ Needs verification (77%)
   - **Why Important:** Tool management for agent capabilities
   - **Files to Create:**
     - `letta-server/src/tools/tool_manager.rs`

**Total Operations:** 28 operations (32% of total)
**Total Time:** 4-5 days

---

### 🟢 **Phase 3: Extended Features (Week 3)**
**Focus:** Sources and jobs

5. **letta_source_manager** (15 operations)
   - **Effort:** 2 days
   - **SDK Ready:** ✅ Yes (87%)
   - **Why Useful:** Document/data source management
   - **Files to Create:**
     - `letta-server/src/tools/source_manager.rs`

6. **letta_job_monitor** (4 operations)
   - **Effort:** 0.5 days
   - **SDK Ready:** ⚠️ Needs verification (75%)
   - **Why Useful:** Background job tracking
   - **Files to Create:**
     - `letta-server/src/tools/job_monitor.rs`

**Total Operations:** 19 operations (22% of total)
**Total Time:** 2-3 days

---

### 🔵 **Phase 4: Infrastructure (Week 4)**
**Focus:** Production readiness

7. **HTTP Transport**
   - **Effort:** 3-4 days
   - **Why Critical:** Production deployment requirement
   - **Features:**
     - Streamable HTTP with SSE
     - Session management
     - CORS support
     - Health endpoints
   - **Files to Create:**
     - `letta-server/src/transports/http.rs`

8. **Testing & Validation**
   - **Effort:** 2-3 days
   - **Coverage Target:** 80%+
   - **Test Types:**
     - Unit tests per operation
     - Integration tests with mock Letta
     - End-to-end with real Letta instance
     - Performance benchmarks

**Total Time:** 5-7 days

---

### ⚪ **Phase 5: Advanced (Future)**
**Focus:** MCP-to-MCP operations

9. **letta_mcp_ops** (10 operations)
   - **Effort:** 5-7 days
   - **SDK Ready:** ❌ No (custom implementation)
   - **Why Deferred:** Complex, not essential for core functionality
   - **Note:** Can operate without this initially

**Total Operations:** 10 operations (11% of total)

---

## Coverage by Numbers

### Overall Tool Coverage
```
Implemented:   6/87 operations (6.9%)
SDK Ready:    74/87 operations (85%)
Pending:      81/87 operations (93%)
```

### SDK Endpoint Coverage
```
Complete (100%):      15 endpoints (File Sessions, Folders)
Excellent (90%+):     35 endpoints (Memory, Source, Messages)
Good (75-89%):        14 endpoints (Agents)
Unknown (<75%):       15 endpoints (Tools, Jobs)
Not Applicable:       10 endpoints (MCP custom)
```

### Implementation Velocity Targets
```
Week 1 (Phase 1):  24 operations → 30/87 total (34%)
Week 2 (Phase 2):  28 operations → 58/87 total (67%)
Week 3 (Phase 3):  19 operations → 77/87 total (89%)
Week 4 (Phase 4):  HTTP Transport + Testing
```

---

## File Structure

```
letta-server/
├── src/
│   ├── main.rs                    ✅ Entry point (exists)
│   ├── lib.rs                     ✅ Server core (exists)
│   ├── tools/
│   │   ├── mod.rs                 ⏳ Tool registry (needs update)
│   │   ├── agent_advanced.rs      🟡 Partial (6/22)
│   │   ├── file_folder_ops.rs     ❌ NEW (0/8)
│   │   ├── memory_unified.rs      ❌ NEW (0/15)
│   │   ├── tool_manager.rs        ❌ NEW (0/13)
│   │   ├── source_manager.rs      ❌ NEW (0/15)
│   │   ├── job_monitor.rs         ❌ NEW (0/4)
│   │   └── mcp_ops.rs             ⚪ FUTURE (0/10)
│   └── transports/
│       └── http.rs                ❌ NEW (TurboMCP)
├── Cargo.toml                     ✅ Dependencies configured
└── README.md                      ⏳ Needs update
```

---

## Dependencies

### Already Configured ✅
```toml
[dependencies]
turbomcp = { version = "2.0.0-rc.3", features = ["full"] }
letta = { git = "https://github.com/oculairmedia/letta-rs.git", branch = "add-missing-endpoints" }
tokio = { version = "1.47", features = ["full"] }
serde = { version = "1.0", features = ["derive"] }
serde_json = "1.0"
anyhow = "1.0"
thiserror = "2.0"
tracing = "0.1"
```

### May Need to Add
```toml
axum = "0.7"              # For HTTP transport
tower = "0.5"             # Middleware for axum
tower-http = "0.5"        # CORS, session management
uuid = { version = "1.0", features = ["v4", "serde"] }  # Session IDs
```

---

## Success Criteria

### Minimal Viable Product (MVP)
- ✅ SDK integration complete (91%)
- ⏳ Core tools implemented (agent, file, memory)
- ⏳ HTTP transport working
- ⏳ Basic testing coverage (50%+)

**Timeline:** 2-3 weeks

### Production Ready
- ✅ SDK integration complete (91%)
- ⏳ All tools implemented (except MCP ops)
- ⏳ HTTP transport with sessions
- ⏳ Comprehensive testing (80%+)
- ⏳ Performance benchmarks met
- ⏳ Documentation complete

**Timeline:** 3-4 weeks

### Feature Complete
- ✅ SDK integration complete (91%)
- ⏳ All tools implemented (including MCP ops)
- ⏳ Advanced HTTP features (streaming, SSE)
- ⏳ 100% test coverage
- ⏳ Performance optimizations
- ⏳ Production deployment guide

**Timeline:** 5-6 weeks

---

## Key Metrics

### Performance Targets
```
Startup Time:     < 500ms  (Node.js: ~2s)
Memory (Idle):    < 50MB   (Node.js: ~80MB)
Request Latency:  -30% vs Node.js
Throughput:       100 concurrent requests
```

### Quality Targets
```
Test Coverage:    80%+
Clippy Warnings:  0
Documentation:    All public APIs
Type Safety:      100% (no unsafe, no unwrap in prod)
```

---

## Next Steps

1. **Today:** Implement `letta_file_folder_ops` (8 operations)
2. **This Week:** Complete `letta_agent_advanced` (16 operations)
3. **Next Week:** Implement `letta_memory_unified` and `letta_tool_manager`
4. **Week 3:** Complete remaining tools and HTTP transport
5. **Week 4:** Testing, documentation, deployment

**See IMPLEMENTATION_ROADMAP.md for detailed plan**