BSN-Chatsystem/docs/nanobanana-skill.md

---
name: nanobanana-image-gen
description: Bilder per NanoBanana API generieren — Text-to-Image + Image-to-Image (Brettspiel-Cover + Prompt) für BSN-News-Artikel
version: 1.0.0
category: creative
metadata:
  hermes:
    tags: [nanobanana, image-generation, bsn, article-images, midjourney-alternative]
    base_url: https://api.nanobananaapi.ai
    token_env: NANOBANANA_API_KEY
    docs: https://docs.nanobananaapi.ai
---

# NanoBanana Image Generation — BSN News

> **API:** https://api.nanobananaapi.ai
> **Docs:** https://docs.nanobananaapi.ai
> **Auth:** `Authorization: Bearer <API_KEY>` (in `~/.hermes/profiles/cody/.env` als `NANOBANANA_API_KEY`)
> **Modelle:** NanoBanana AI (Basis), NanoBanana 2 (empfohlen), NanoBanana Pro

---

## API-Referenz

### POST /api/v1/nanobanana/generate-2 (empfohlen)

```json
{
  "prompt": "Text-Prompt (max 20.000 Zeichen)",
  "imageUrls": ["https://...brettspiel-cover.jpg"],  // [] für Text-to-Image
  "aspectRatio": "16:9",   // 1:1|1:4|2:3|3:2|3:4|4:3|4:5|5:4|9:16|16:9|21:9|auto
  "resolution": "2K",      // 1K|2K|4K
  "googleSearch": false,   // Web-Grounding für Akkuratesse
  "outputFormat": "jpg",   // png|jpg
  "callBackUrl": ""        // Optional, für async
}
```

**Response:** `{"code": 200, "msg": "success", "data": {"taskId": "abc123"}}`

### GET /api/v1/nanobanana/record-info?taskId=abc123

**Response (fertig):**
```json
{
  "code": 200,
  "data": {
    "status": "SUCCESS",
    "imageUrls": ["https://cdn.nanobananaapi.ai/result/abc123_0.jpg"],
    "prompt": "...",
    "taskId": "abc123"
  }
}
```

**Status-Werte:** `PENDING` → warten, `SUCCESS` → fertig, `FAILED` → Fehler

### POST /api/v1/nanobanana/generate (Basis-Modell)

```json
{
  "prompt": "...",
  "type": "TEXTTOIAMGE",   // TEXTTOIAMGE|IMAGETOIAMGE
  "numImages": 1,          // 1-4
  "imageUrls": [],
  "callBackUrl": ""
}
```

---

## BSN-Use-Cases

### 1. Artikel-Header-Bild aus Prompt

```bash
curl -s -X POST "https://api.nanobananaapi.ai/api/v1/nanobanana/generate-2" \
  -H "Authorization: Bearer $(bsn-secrets get bsn/nanobanana-key)" \
  -H "Content-Type: application/json" \
  -d '{
    "prompt": "Professional board game photography of Catan, hexagonal tiles, wooden pieces, warm lighting, 4K product shot style",
    "aspectRatio": "16:9",
    "resolution": "2K",
    "imageUrls": [],
    "outputFormat": "jpg"
  }'
```

### 2. Brettspiel-Cover veredeln (Image-to-Image)

```bash
curl -s -X POST "https://api.nanobananaapi.ai/api/v1/nanobanana/generate-2" \
  -H "Authorization: Bearer $(bsn-secrets get bsn/nanobanana-key)" \
  -H "Content-Type: application/json" \
  -d '{
    "prompt": "Transform this board game cover into a cinematic movie poster style, dramatic lighting, epic composition, keep the game title and theme",
    "imageUrls": ["https://example.com/catan-cover.jpg"],
    "aspectRatio": "2:3",
    "resolution": "2K",
    "outputFormat": "jpg"
  }'
```

### 3. Polling bis zum Ergebnis (Python)

```python
import time, requests, json

API_KEY = subprocess.run(["bsn-secrets","get","bsn/nanobanana-key"], capture_output=True, text=True).stdout.strip()
HEADERS = {"Authorization": f"Bearer {API_KEY}", "Content-Type": "application/json"}

# Task starten
resp = requests.post("https://api.nanobananaapi.ai/api/v1/nanobanana/generate-2", headers=HEADERS, json={
    "prompt": prompt,
    "imageUrls": image_urls if image_urls else [],
    "aspectRatio": aspect_ratio,
    "resolution": resolution,
    "outputFormat": output_format,
}).json()

task_id = resp["data"]["taskId"]

# Pollen
for _ in range(30):  # max 5 Minuten
    time.sleep(10)
    r = requests.get(f"https://api.nanobananaapi.ai/api/v1/nanobanana/record-info?taskId={task_id}", headers=HEADERS).json()
    if r["data"]["status"] == "SUCCESS":
        return r["data"]["imageUrls"]
    elif r["data"]["status"] == "FAILED":
        raise Exception("Generation failed")

raise TimeoutError("Timeout after 5 minutes")
```

---

## Prompt-Engineering für Brettspiele

### Gute Prompts (funktionieren):
- `"Professional product photography of [SPIELNAME] board game, box art, cinematic lighting, 4K resolution, clean background"`
- `"A family playing [SPIELNAME] at a wooden table, warm candlelight, cozy atmosphere, lifestyle photography"`
- `"Transform this board game cover into a [STIL] style poster, keep title and key art elements"`

### Aspect-Ratio-Guide:
| Zweck | Ratio |
|---|---|
| Header-Bild (News) | 16:9 |
| Thumbnail | 1:1 |
| Instagram/Story | 9:16 |
| Cover-Reproduktion | 2:3 (Standard-Brettspiel-Box) |
| Breitformat-Banner | 21:9 |

### Styles für Brettspiel-Bilder:
- `product shot style` — clean, wie Amazon-Produktbilder
- `lifestyle photography` — Menschen spielen am Tisch
- `cinematic movie poster` — dramatisch, episch
- `flat lay top-down` — von oben, alle Komponenten sichtbar
- `watercolor illustration` — künstlerisch, handgemalt

---

## API-Key-Management

Der API-Key wird als Secret via `bsn-secrets` gespeichert:
```bash
echo "nb_api_key..." | bsn-secrets set bsn/nanobanana-key
```

Abruf: `bsn-secrets get bsn/nanobanana-key`

**Key beziehen:** https://nanobananaapi.ai/api-key

---

## Kosten

- Credit-basiertes System — vor Nutzung Credits prüfen:
```bash
curl -s "https://api.nanobananaapi.ai/api/v1/common/account-credits" \
  -H "Authorization: Bearer $(bsn-secrets get bsn/nanobanana-key)"
```

## Pitfalls

- **Task ist asynchron** — `POST` gibt sofort `taskId` zurück, Ergebnis erst nach 10-60s via GET
- **NICHT blockierend warten** — Pollen mit 10s Intervallen, max 30 Versuche
- **`imageUrls: []` für Text-to-Image** — Leeres Array, nicht weglassen
- **Prompt-Länge max 20K** bei generate-2, weniger bei generate
- **Aspect-Ratio als String** `"16:9"` — nicht als Float
- **Status-Check:** Immer `r["data"]["status"]` prüfen — nicht `r["code"]`