template-generate

name	template-generate
description	Generate an image from a filled prompt template using viostudio.id API (nano-banana-2). Takes a template ID (1-40). Uploads brand reference images, submits generation, polls for completion, and saves the result log.
argument-hint	["template_id 1-40"]
disable-model-invocation	true

/ads-creative:template-generate

Generate an image from a filled prompt template via viostudio.id API.

Input

$ARGUMENTS — template number, 1 through 40.

If $ARGUMENTS is empty or not a valid number, ask:

Template nomor berapa yang ingin di-generate? (1-40) Contoh: /ads-creative:template-generate 5

---

Pre-checks

1. API Key

Check for VIOSTUDIO_API_KEY environment variable.

If not set, ask the user:

⚠️ API key viostudio.id belum dikonfigurasi.

Set environment variable sebelum menjalankan Claude Code:

export VIOSTUDIO_API_KEY=vio_sk_xxxxx

Atau berikan API key-nya sekarang dan saya akan gunakan untuk sesi ini.

If user provides a key inline, use it for this session. Then STOP until key is available.

2. Filled Prompts File

Look for *-prompts.md files in the output/ directory of the current working directory.

If none found:

⚠️ Belum ada filled prompts. Jalankan dulu: /ads-creative:template-builder [nama produk]

Then STOP.

If multiple files found, ask user which one to use.

3. Parse the Requested Template

Read the prompts file and extract:

• Brand Directory — from the header line **Brand Directory:** brands/{brand-name}/
• Full prompt text — section matching ## Template $ARGUMENTS (or ## Template $ARGUMENTS —), everything under ### Prompt until the next ---
• Aspect ratio — scan the prompt text for patterns like Rasio aspek 4:5, rasio 4:5, aspect ratio 4:5, or 4:5. Default to 1:1 if none found.

4. Reference Images

UGC templates — skip reference images entirely:

The following templates are UGC/native style where the product is not shown and reference images cause a "Gambar referensi tidak valid" rejection from the model. For these templates, skip all image upload and asset steps and go directly to Step 2 (Submit Generation) with no reference_asset_ids:

Template	Name
8	Before & After UGC
20	Advertorial / Editorial Content Card
29	UGC + Viral Post Overlay
32	UGC Story Callout
36	Whiteboard Before/After
39	Curiosity Gap / Scroll-Stopper

For all other templates, proceed with the reference image flow below.

---

Scan the Brand Directory parsed above for image files with extensions: .jpg, .jpeg, .png (case-insensitive). Exclude assets.json and brand-dna.md from the scan.

If the Brand Directory is missing or no images are found:

⚠️ Tidak ada foto referensi ditemukan di brands/{brand-name}/.

Tambahkan foto produk, logo, atau packaging ke folder tersebut sebelum generate. Format: JPEG atau PNG, maks. 20 MB per file.

Contoh:

brands/{brand-name}/
├── brand-dna.md
├── logo.png
├── product-front.jpg
└── packaging.jpg

Then STOP.

Asset cache check:

Check if brands/{brand-name}/assets.json exists and read it if so. The file has this structure:

{
  "uploaded_at": "2026-03-24T15:00:00Z",
  "assets": [
    {"filename": "logo.png", "asset_id": 123, "url": "https://s3.viostudio.id/..."},
    {"filename": "product-front.jpg", "asset_id": 124, "url": "https://s3.viostudio.id/..."}
  ]
}

Apply the following logic:

1. Cache is stale (older than 25 days): Ignore the cache entirely — re-upload all images. The viostudio.id API expires assets after 30 days; the 25-day threshold gives a 5-day safety buffer.

2. Cache exists and is fresh:

   • Build a map of filename → asset_id from the cache
   • For each image file found in the Brand Directory:
     • If filename exists in the cache → use the cached asset_id, skip upload
     • If filename is not in the cache (new file added) → upload it, collect the new asset_id
   • Ignore cache entries whose filename no longer exists in the directory (file was deleted)
   • If any new files were uploaded, update assets.json with the new entries (keep existing ones, append new ones, update uploaded_at to now)

3. Cache does not exist: Upload all images, create assets.json.

To force a full re-upload (e.g. user replaced a file with the same name), the user can delete assets.json and re-run.

After resolving asset IDs, report to user:

📸 [N] foto referensi siap (X dari cache, Y di-upload baru):

• logo.png → asset ID 123 (cached)
• product-front.jpg → asset ID 124 (cached)
• new-photo.jpg → asset ID 125 (uploaded)

5. Check Credits

curl -s -X GET "https://api.viostudio.id/v1/account/credits" \
  -H "Authorization: Bearer $VIOSTUDIO_API_KEY"

• If the response indicates insufficient credits (total_credits < 3):

  ⚠️ Credits tidak cukup untuk generate (butuh minimal 3 credits untuk nano-banana-2). Sisa credits: [total_credits]

  Then STOP.

• If credits are sufficient, continue.

---

Generation Flow

Step 1 — Upload New Reference Images

Only upload image files that were not resolved from the cache in Pre-check 4. Skip this step entirely if all images were served from cache.

For each image that needs uploading:

curl -s -X POST "https://api.viostudio.id/v1/assets" \
  -H "Authorization: Bearer $VIOSTUDIO_API_KEY" \
  -F "file=@brands/{brand-name}/{filename}"

Response 201 Created:

{
  "asset_id": 123,
  "content_type": "image/jpeg",
  "url": "https://s3.viostudio.id/assets/...",
  "created_at": "..."
}

• Collect the new asset_id values and merge with cached IDs into a single array
• If any upload fails (non-201 response), show the error and ask the user whether to continue with successfully resolved images or STOP
• After uploads, write/update brands/{brand-name}/assets.json with all current entries and set uploaded_at to the current ISO timestamp

Step 2 — Submit Generation

curl -s -X POST "https://api.viostudio.id/v1/images/generate" \
  -H "Authorization: Bearer $VIOSTUDIO_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "nano-banana-2",
    "prompt": "[FULL PROMPT TEXT]",
    "aspect_ratio": "[ASPECT RATIO]",
    "reference_asset_ids": [123, 124, 125]
  }'

Response 202 Accepted:

{
  "generation_ids": [1001],
  "status": "queued",
  "credits_charged": 3,
  "estimated_seconds": 30
}

• Parse generation_ids (array) — use the first ID for polling
• Store credits_charged from this response
• If the response contains an error, display it and STOP

Step 3 — Poll for Completion

Poll GET /v1/generations/{generation_id} using generation_ids[0]:

Phase	Interval	Max attempts
Phase 1	every 1s	10 times (0–10s)
Phase 2	every 5s	10 times (10–60s)
Phase 3	every 10s	until done or 10min total timeout

curl -s -X GET "https://api.viostudio.id/v1/generations/{generation_id}" \
  -H "Authorization: Bearer $VIOSTUDIO_API_KEY"

Response:

{
  "id": 1001,
  "status": "completed",
  "asset_url": "https://s3.viostudio.id/generations/...",
  "credits_charged": 3,
  "error_message": null
}

Update the user between phases:

⏳ Status: [status] — [elapsed]s

Possible statuses: queued, processing, completed, failed

If status is failed, report error_message and STOP.

If 10 minutes pass without completion, report a timeout and STOP.

Step 4 — Handle Completion

On completed:

1. Extract asset_url from the poll response
2. Use credits_charged from the initial 202 response (Step 2)
3. Determine the file extension from the asset_url (e.g. .jpg, .png). Default to .jpg if unclear.
4. Download the image to output/generated/template-{id}-{timestamp}{ext}:

curl -s -L "{asset_url}" -o "output/generated/template-{id}-{timestamp}{ext}"

If the download fails (non-zero exit or empty file), warn the user but do not STOP — the image is still accessible via the URL.

---

Save Result Log

Create directories if needed, then save to output/generated/template-{id}-{timestamp}.md:

# Generated: Template {id}

- **Template:** {template name}
- **Model:** nano-banana-2
- **Aspect Ratio:** {ratio}
- **Status:** completed
- **Credits Used:** {credits_charged}
- **Generated At:** {ISO timestamp}
- **Image URL:** {asset_url}
- **Local File:** output/generated/template-{id}-{timestamp}{ext}
- **Reference Images:** {comma-separated filenames} (asset IDs: {comma-separated IDs})

## Prompt Used

{full prompt text}

---

Final Output to User

✅ Template {id} berhasil di-generate!

🖼️  Image URL: {asset_url}
💾  Saved to: output/generated/template-{id}-{timestamp}{ext}
💳  Credits used: {credits_charged}
📸  Reference images: {N} foto (asset IDs: {ids})
📄  Log: output/generated/template-{id}-{timestamp}.md

---

Known Failure Patterns

These are confirmed causes of generation rejection by nano-banana-2. If a generation fails, check the prompt against this list before retrying.

Pattern	Why it fails	Fix
Mentioning real platform brands (Twitter, X, Reddit, Facebook, Instagram, TikTok)	Trademark filter	Use generic terms: "platform media sosial", "forum online", "postingan komunitas"
Fake social media UI specifics (username @handle, upvote counts, retweet numbers, timestamps like "2j")	Detected as fake screenshot generation	Use generic UI shapes: "kotak putih bersudut membulat", "nama pengguna anonim", "stempel waktu"
Reference image sent with UGC/selfie-style prompt	Reference image (product photo) conflicts with selfie/UGC style prompt	Skip reference_asset_ids for UGC templates (see list above)
Mentioning real publication brands (Daily Mail, Vogue, TODAY) in editorial templates	Trademark filter	Use generic: "publikasi media terkemuka", "majalah gaya hidup ternama"

Retry without reference images

If a non-UGC template fails with an error that suggests image conflict or content rejection, automatically retry once without reference_asset_ids and notify the user:

⚠️ Generate gagal dengan referensi gambar. Mencoba ulang tanpa referensi...

If the retry succeeds, note it in the result log: **Reference Images:** none (retry without references).

---

API Reference

Endpoint	Method	Purpose
/v1/account/credits	GET	Check remaining credits
/v1/assets	POST	Upload reference image (multipart/form-data)
/v1/images/generate	POST	Submit image generation
/v1/generations/{id}	GET	Poll generation status

Auth header: Authorization: Bearer $VIOSTUDIO_API_KEY Default model: nano-banana-2 — 3 credits/image Base URL: https://api.viostudio.id/v1 Max reference images: 10 (nano-banana-2) Supported upload formats: JPEG, PNG (max 20 MB each)