mirror of
https://github.com/Memo-2023/mana-monorepo.git
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35f4bd48de
- mana-image-gen: change default port from 3025 to 3026 to avoid conflict with mana-llm
- Dashboard widgets (12): replace APP_URLS.{app}.dev/prod with internal route paths (/todo, /calendar, etc.)
and remove target="_blank" since all apps are now internal routes in the unified app
- Home page: use goto() for internal apps, keep window.open() only for external apps (matrix, arcade)
- AppRow: remove unused APP_URLS import
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
192 lines
4.4 KiB
Markdown
192 lines
4.4 KiB
Markdown
# CLAUDE.md - Mana Image Generation Service
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## Service Overview
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AI image generation microservice using FLUX.2 klein 4B model via flux2.c:
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- **Port**: 3026
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- **Framework**: Python + FastAPI
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- **Model**: FLUX.2 klein 4B (Black Forest Labs)
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- **Backend**: flux2.c (Pure C, MPS accelerated)
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## Features
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- **Sub-second generation** on Apple Silicon (M4)
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- **Memory efficient**: ~4-5 GB RAM usage (memory-mapped weights)
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- **Apache 2.0 license**: Commercially usable
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- **4 sampling steps**: Optimized for speed
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- **1024x1024 default resolution**
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## Commands
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```bash
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# Setup (installs flux2.c + downloads model)
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./setup.sh
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# Development
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source .venv/bin/activate
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FLUX_BINARY=/opt/flux2/flux FLUX_MODEL_DIR=/opt/flux2/model \
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uvicorn app.main:app --host 0.0.0.0 --port 3026 --reload
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# Production
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../../scripts/mac-mini/setup-image-gen.sh
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# Test
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curl http://localhost:3026/health
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curl -X POST http://localhost:3026/generate \
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-H "Content-Type: application/json" \
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-d '{"prompt": "A cat in space"}' | jq
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```
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## File Structure
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```
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services/mana-image-gen/
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├── app/
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│ ├── __init__.py
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│ ├── main.py # FastAPI endpoints
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│ └── flux_service.py # flux2.c subprocess wrapper
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├── setup.sh # Setup script
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├── requirements.txt
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├── CLAUDE.md
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└── README.md
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```
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## API Endpoints
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| Endpoint | Method | Purpose |
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|----------|--------|---------|
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| `/health` | GET | Health check |
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| `/models` | GET | Model info |
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| `/generate` | POST | Generate image |
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| `/images/{filename}` | GET | Serve generated image |
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| `/images/{filename}` | DELETE | Delete image |
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| `/cleanup` | POST | Clean old images |
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## Generate Request
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```json
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{
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"prompt": "A beautiful sunset over mountains",
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"width": 1024,
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"height": 1024,
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"steps": 4,
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"seed": -1,
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"output_format": "png"
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}
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```
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## Generate Response
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```json
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{
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"success": true,
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"image_url": "/images/abc123.png",
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"prompt": "A beautiful sunset over mountains",
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"width": 1024,
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"height": 1024,
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"steps": 4,
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"seed": 42,
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"generation_time": 0.85
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}
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```
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## Environment Variables
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| Variable | Default | Description |
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|----------|---------|-------------|
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| `PORT` | `3026` | Service port |
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| `FLUX_BINARY` | `/opt/flux2/flux` | Path to flux2.c binary |
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| `FLUX_MODEL_DIR` | `/opt/flux2/model` | Path to model weights |
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| `DEFAULT_STEPS` | `4` | Default sampling steps |
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| `DEFAULT_WIDTH` | `1024` | Default image width |
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| `DEFAULT_HEIGHT` | `1024` | Default image height |
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| `GENERATION_TIMEOUT` | `120` | Timeout in seconds |
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| `MAX_PROMPT_LENGTH` | `2000` | Max prompt chars |
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| `CORS_ORIGINS` | (production URLs) | CORS config |
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## Model Details
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### FLUX.2 klein 4B
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- **Parameters**: 4 billion
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- **License**: Apache 2.0 (commercial use allowed)
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- **Download size**: ~16 GB
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- **RAM usage**: ~4-5 GB (memory-mapped)
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- **Optimal steps**: 4 (distilled model)
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- **Release**: January 2026
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## Integration with Other Apps
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The service is designed to be used by:
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- **Picture App** (`apps/picture/`) - AI image generation platform
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- **Chat App** (`apps/chat/`) - Inline image generation
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- **Matrix Bots** - Image generation via chat commands
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- **API Gateway** - Public API access
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### Example Integration (TypeScript)
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```typescript
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const response = await fetch('http://localhost:3026/generate', {
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method: 'POST',
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headers: { 'Content-Type': 'application/json' },
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body: JSON.stringify({
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prompt: 'A futuristic city at night',
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width: 1024,
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height: 1024,
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}),
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});
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const result = await response.json();
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const imageUrl = `http://localhost:3026${result.image_url}`;
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```
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## Dependencies
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- `fastapi` - Web framework
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- `uvicorn` - ASGI server
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- `pillow` - Image processing
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- `flux2.c` - Native binary (installed separately)
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## Performance
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On Mac Mini M4 (16 GB):
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| Resolution | Steps | Time |
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|------------|-------|------|
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| 512x512 | 4 | ~0.3s |
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| 1024x1024 | 4 | ~0.8s |
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| 1024x1024 | 8 | ~1.5s |
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## Troubleshooting
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### flux2.c not found
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```bash
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# Verify installation
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ls -la /opt/flux2/flux
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# Reinstall
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sudo rm -rf /opt/flux2
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./setup.sh
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```
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### Model not found
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```bash
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# Check model directory
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ls -la /opt/flux2/model/
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# Re-download
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cd /opt/flux2/src
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./download-model.sh /opt/flux2/model
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```
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### Out of memory
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- Reduce resolution to 512x512
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- Close other applications
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- The 16 GB Mac Mini should handle 1024x1024 fine
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### Slow generation
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- Ensure MPS build was used: `make mps`
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- Check Metal GPU is being used
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- Reduce steps (4 is optimal for klein)
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