Banana Studio Generate

Banana Studio Generate

Use this skill when you need to generate images through the Banana Studio backend instead of calling a model provider directly.

What it does

• Sends pw directly on backend requests
• Uses the same direct pw auth path as the Studio frontend, via x-banana-pw
• Calls POST /api/generate/stream with the same request shape as the frontend
• Supports prompt-only runs
• Supports storyboard-file runs that generate each cell separately and render captions with the tool via POST /api/export/professional-preview
• Storyboard layouts are customizable; the bundled markdown files are examples, not fixed presets
• In storyboard mode, the script automatically chooses the closest supported image aspect ratio for each cell based on canvas size and row/column layout, which reduces export-time cropping
• Supports the same request fields the frontend sends:
  • prompt
  • modelId
  • imageOptions.aspectRatio
  • imageOptions.imageSize
  • imageOptions.layoutRows
  • imageOptions.layoutColumns
  • layoutGuideImage
  • referenceImages
• Supports reference images from either local file paths or remote http(s) image URLs

Default workflow

Run the bundled script at scripts/banana_studio_generate.mjs:

node /absolute/path/to/banana_studio_generate.mjs --prompt "A banana astronaut on the moon"

For captioned storyboard exports, pass --storyboard-file:

node /absolute/path/to/banana_studio_generate.mjs \
  --storyboard-file /abs/path/jingyesi-4-panel.md

If you need a different layout than the file's default, override it explicitly:

node /absolute/path/to/banana_studio_generate.mjs \
  --storyboard-file /abs/path/jingyesi-4-panel.md \
  --layout-rows 4 \
  --layout-columns 1

For prompt-only usage, set a default pw once:

export BANANA_STUDIO_PW="your-pw"

You can also put a local .env file beside SKILL.md and scripts/:

BANANA_STUDIO_PW=your-pw
BANANA_STUDIO_API_BASE_URL=http://127.0.0.1:23001

Optional env vars:

export BANANA_STUDIO_API_BASE_URL="http://127.0.0.1:3001"
export BANANA_STUDIO_PW="your-pw"

Common variants

Override pw explicitly:

node /absolute/path/to/banana_studio_generate.mjs \
  --prompt "A banana astronaut on the moon" \
  --pw "test-banana"

Pass frontend-style options directly:

node /absolute/path/to/banana_studio_generate.mjs \
  --prompt "A vertical comic about a banana detective" \
  --pw "test-banana" \
  --model-id "nano-banana-2" \
  --aspect-ratio "1:8" \
  --image-size "2K" \
  --layout-rows 7 \
  --layout-columns 1

Attach local images by file path:

node /absolute/path/to/banana_studio_generate.mjs \
  --prompt "Use the references for style and character design" \
  --pw "test-banana" \
  --reference-image /abs/path/ref-1.png \
  --reference-image /abs/path/ref-2.jpg \
  --layout-guide /abs/path/layout-guide.png

Attach remote reference images by URL:

node /absolute/path/to/banana_studio_generate.mjs \
  --prompt "Use the portrait as the character reference" \
  --pw "test-banana" \
  --reference-image "https://cdn.example.com/libai.png"

Send an exact frontend-compatible payload:

node /absolute/path/to/banana_studio_generate.mjs \
  --pw "test-banana" \
  --payload-file /abs/path/payload.json

payload.json can contain the same JSON shape the frontend posts to /api/generate/stream.

Storyboard markdown format:

---
title: 静夜思四格
globalStylePrompt: 中国古典水墨插画，唐风卧房夜景，月色柔和，留白克制，统一人物形象与服饰
canvasWidth: 1080
canvasHeight: 1440
layoutRows: 2
layoutColumns: 2
aspectRatio: 3:4
imageSize: 1K
---
| row | column | content | caption |
| --- | --- | --- | --- |
| 1 | 1 | 古代卧房，木床与窗棂，皎洁月光洒在床前，诗人刚刚醒来，神情安静 | 床前明月光 |
| 1 | 2 | 地面被月光照亮，如同覆着一层清霜，诗人低头凝视地面，室内静谧清冷 | 疑是地上霜 |
| 2 | 1 | 诗人缓缓举头望向窗外明月，夜空澄净，月轮高悬，构图清朗 | 举头望明月 |
| 2 | 2 | 诗人低头沉思故乡，神情含蓄克制，背景隐约浮现远方家园与夜色意象 | 低头思故乡 |

Vertical 1x4 example:

assets/jingyesi-1x4.md

Layout notes

• Storyboard layout is customizable; you are not limited to the bundled examples.
• assets/jingyesi-4-panel.md and assets/jingyesi-1x4.md are only example templates.
• You can create your own storyboard file with any reasonable layoutRows, layoutColumns, canvas size, panel content, and captions.
• You can also override a storyboard file's default layout at runtime with --layout-rows and --layout-columns.

Output

The script:

• streams backend status to stderr
• saves the generated image under ./storage/skill-runs/... by default
• writes a result.json summary beside the image
• in storyboard mode, writes a captioned final result.png rendered by the tool instead of relying on the model to paint text
• also writes a zip asset package beside the image, including result.png, result.json, request.payload.json, and extracted reference/layout images
• prints a concise JSON summary to stdout

Notes

• If --pw is omitted, the script reads BANANA_STUDIO_PW.
• If BANANA_STUDIO_PW is also omitted, the script loads .env from the skill directory and reads BANANA_STUDIO_PW.
• If --api-base-url is omitted, the script reads BANANA_STUDIO_API_BASE_URL and falls back to http://127.0.0.1:3001.
• The local skill config uses standard dotenv / .env format with KEY=value entries such as BANANA_STUDIO_PW=....
• The script defaults to modelId: "nano-banana-2" and frontend-like image defaults when you do not provide them.
• --reference-image and --layout-guide accept either a local file path or a remote image URL.
• In payload.json, referenceImages and layoutGuideImage may be passed as embedded frontend-style objects, local paths, or remote image URLs.
• When the user asks for per-panel captions, prefer --storyboard-file so captions are rendered by the tool and the generated images themselves can stay text-free.
• In storyboard mode, the script derives a near-matching cell aspect ratio from canvasWidth / layoutColumns and canvasHeight / layoutRows, then adds a prompt hint to keep the subject inside a safe area so final export cropping is reduced.
• In storyboard mode, --layout-rows and --layout-columns override the file's layout and reflow cells by order, which avoids accidental 2x2/1x4 mismatches.
• If storyboard coordinates fall outside the configured layout or collide, the script now throws an error instead of silently clamping them.
• The printed result JSON includes assetPackagePath so callers can return a downloadable zip together with result.png and result.json.
• When the user gives a reference image URL in natural language, treat it as a referenceImages input rather than leaving it only inside the prompt text.
• When Codex uses this skill, resolve scripts/banana_studio_generate.mjs relative to the skill directory instead of assuming a repo-local skills/ folder.