# Neo4j Setup Complete ✅

## Status: FULLY INTEGRATED

Neo4j has been fully integrated into the TraceRTM backend with multi-project support.

## What Was Added

### 1. Go Packages
```bash
✅ github.com/neo4j/neo4j-go-driver/v5 v5.28.4
```

### 2. New Files Created

**Core Neo4j Client**
- `backend/internal/graph/namespace.go` - Project namespace constants
- `backend/internal/graph/neo4j_client.go` - Neo4j client with multi-project support
- `backend/internal/graph/neo4j_queries.go` - Common query operations
- `backend/internal/graph/project_context_middleware.go` - Project context management
- `backend/internal/graph/neo4j_init.go` - Initialization and setup

### 3. Configuration Updates
- `backend/internal/config/config.go` - Added Neo4j config fields:
  - `Neo4jURI` - Connection URI
  - `Neo4jUser` - Username
  - `Neo4jPassword` - Password

### 4. Main Application Integration
- `backend/main.go` - Added Neo4j initialization:
  - Initializes Neo4j client
  - Creates project nodes
  - Verifies connection
  - Defers cleanup

## Environment Variables

Add these to your `.env` file:

```bash
# Neo4j Configuration
NEO4J_URI=neo4j://localhost:7687
NEO4J_USER=neo4j
NEO4J_PASSWORD=password
```

For production (Neo4j Aura):
```bash
NEO4J_URI=neo4j+s://your-aura-host:7687
NEO4J_USER=neo4j
NEO4J_PASSWORD=your-aura-password
```

## Project Namespaces

The system supports 4 project namespaces:

```go
const (
    NamespaceBifrost   = "bifrost"
    NamespaceVibeProxy = "vibeproxy"
    NamespaceJarvis    = "jarvis"
    NamespaceTrace     = "trace"
)
```

## Quick Start

### 1. Local Development (Docker)

```bash
# Start Neo4j
docker run -d \
  --name neo4j \
  -p 7474:7474 \
  -p 7687:7687 \
  -e NEO4J_AUTH=neo4j/password \
  neo4j:latest

# Access browser
# http://localhost:7474
```

### 2. Build Backend

```bash
cd backend
go build -o tracertm-backend main.go
```

### 3. Run Backend

```bash
export NEO4J_URI=neo4j://localhost:7687
export NEO4J_USER=neo4j
export NEO4J_PASSWORD=password

./tracertm-backend
```

## API Usage

### Create Project Context

```go
projectCtx := graph.NewProjectContext("bifrost", "workspace-1")
```

### Create Model

```go
model := graph.Model{
    ID:      "model-1",
    Name:    "GPT-4",
    Version: "1.0",
    Type:    "LLM",
}

err := neo4jClient.CreateModel(ctx, projectCtx, model)
```

### Get Models

```go
models, err := neo4jClient.GetModels(ctx, projectCtx)
```

### Create Relationship

```go
err := neo4jClient.CreateRelationship(
    ctx,
    projectCtx,
    "model-1",
    "model-2",
    "DEPENDS_ON",
)
```

## Multi-Project Isolation

All queries automatically include project isolation:

```go
// Automatically adds project_id filter
result, err := neo4jClient.ExecuteQuery(ctx, projectCtx, query, params)
```

## Testing

```bash
cd backend
go test ./internal/graph/... -v
```

## Next Steps

1. ✅ Neo4j client created
2. ✅ Multi-project support implemented
3. ✅ Configuration added
4. ✅ Main.go integration complete
5. ⏭️ Create integration tests
6. ⏭️ Add graph handlers
7. ⏭️ Deploy to staging

## Troubleshooting

### Connection Failed
```
Error: failed to verify Neo4j connection
```
- Check NEO4J_URI is correct
- Verify Neo4j is running
- Check credentials

### Project Node Not Found
```
Error: failed to create model: project not found
```
- Ensure project node exists
- Run initialization again

### Index Creation Failed
```
Warning: failed to create indexes
```
- Indexes may already exist
- This is non-fatal

## Documentation

See also:
- NEO4J_COMPLETE_SETUP.md - Full setup guide
- NEO4J_MULTI_PROJECT_STRATEGY.md - Architecture details
- NEO4J_TRACERTM_IMPLEMENTATION.md - Implementation guide

---

**Status**: ✅ **FULLY INTEGRATED**

Neo4j is ready for use in the TraceRTM backend!

