nano-banana-pro
Installation
SKILL.md
nano-banana-pro — single-image generator via OpenRouter
Generates one PNG from a text prompt (optionally seeded with an input
image for editing). Used by meta-short-drama for per-shot first-frame
generation, but standalone for any single-image request.
Inputs (with:)
| key | required | default | notes |
|---|---|---|---|
prompt |
yes | — | Plain English prompt. Append --ar 9:16 etc. as text. |
filename |
yes | — | Output path. Relative resolves against process cwd. |
aspect_ratio |
no | 1:1 |
One of 1:1, 3:2, 2:3, 4:3, 3:4, 16:9, 9:16. |
image_size |
no | 1K |
1K, 2K, 4K. Higher = slower + costlier. |
model |
no | google/gemini-3.1-flash-image-preview |
Any OpenRouter image-capable model. |
max_retries |
no | 0 |
Compatibility budget used only for a failure proven to occur before a paid submit. Provider responses and ambiguous transport failures always stop. |
fallback_model |
no | "" |
Compatibility fallback used only after a proven safe pre-submit failure. It is never selected in response to a provider result or ambiguous paid POST. |
placeholder_on_fail |
no | no |
yes / no. When every model refuses, write a 720x1280 solid-colour PNG with a "Scene placeholder" label so a downstream merge step still has a file in this slot. |