| name | nano-banana-prompting |
| description | This skill should be used when crafting prompts for Nano Banana Pro (Gemini image generation). Use when users want help writing image generation prompts, need guidance on prompt structure, or want to optimize their prompts for better results. |
Nano Banana Prompting
Interactive prompt crafting for Nano Banana Pro image generation. This skill guides users through a structured process to create effective prompts by clarifying intent and applying proven techniques.
Workflow
Step 1: Gather Reference Materials
Before asking questions, check if the user has provided:
- Reference images - Photos to use for character consistency, style, or composition
- Existing prompts - Previous attempts to improve upon
- Visual references - Screenshots or examples of desired output
If reference materials are available, this affects which techniques apply (e.g., Reference Role Assignment, Character Consistency).
Step 2: Clarify Intent with Questions
Use the AskUserQuestion tool to understand the user's goal. Ask questions in batches of 2-4, focusing on the most important aspects first.
Core Questions (always ask)
-
Output Type - What kind of image?
- Photo/realistic
- Illustration/artistic
- Infographic/educational
- Product shot/commercial
- UI mockup/design
-
Subject - Who or what is the main focus?
- Person (with or without reference)
- Object/product
- Scene/environment
- Concept/abstract
Technique-Specific Questions (based on answers)
If Photo/Realistic:
- What era or camera style? (modern DSLR, 1990s film, 2000s digital)
- Specific lighting? (golden hour, studio, flash)
- Aspect ratio needed? (16:9, 9:16, 1:1)
If Reference Images Provided:
- What role for each image? (pose, style, color palette, background)
- Should character identity be preserved?
- Combine images or use as style reference?
If Text Needed:
- What text should appear?
- What font style? (serif, sans-serif, handwritten)
- Where should text be placed?
If Educational/Infographic:
- What concept to explain?
- Target audience level?
- Should it include labels, arrows, flow?
Step 3: Determine Prompt Style
Based on user responses, select the appropriate prompt format from references/guide.md:
| User Need | Recommended Style |
|---|
| Simple, quick generation | Narrative Prompt (Technique 1) |
| Precise control over details | Structured Prompt (Technique 2) |
| Era-specific aesthetic | Vibe Library + Photography Terms (Techniques 3-4) |
| Magazine/poster with text | Physical Object Framing (Technique 5) |
| Conceptual/interpretive | Perspective Framing (Technique 6) |
| Diagram/infographic | Educational Imagery (Technique 7) |
| Editing existing image | Image Transformation (Technique 8) |
| Multiple views/panels | Multi-Panel Output (Technique 9) |
| Multiple reference images | Reference Role Assignment (Technique 12) |
Step 4: Generate the Prompt
Construct the prompt by:
- Loading
references/guide.md to access technique details
- Applying relevant techniques based on Step 3 selection
- Cross-checking against guide examples for proper formatting
- Including negative prompts if needed (Technique 10)
- Specifying aspect ratio/resolution if required (Technique 11)
Prompt Construction Checklist
Step 5: Present and Iterate
Present the generated prompt to the user with:
- The prompt - Ready to use
- Technique explanation - Why this structure was chosen
- Variation suggestions - Alternative approaches to try
Offer to refine based on feedback.
Step 6: Generate the Image
After the user is satisfied with the prompt, recommend using the nano-banana skill to generate the actual image. Inform the user:
"Your prompt is ready! Would you like me to generate the image now? I can use the nano-banana skill to create it."
If the user agrees, invoke the nano-banana skill with the crafted prompt.
Quick Reference: Technique Selection
User wants... → Use Technique...
─────────────────────────────────────────────────────
Simple description → 1 (Narrative)
Detailed control → 2 (Structured YAML/JSON)
Specific era look → 3 (Vibe Library)
Professional photo style → 4 (Photography Terms)
Magazine/poster → 5 (Physical Object Framing)
"How X sees Y" → 6 (Perspective Framing)
Educational diagram → 7 (Educational Imagery)
Edit existing image → 8 (Image Transformation)
Multiple panels in one → 9 (Multi-Panel)
Exclude something → 10 (Negative Prompts)
Specific dimensions → 11 (Aspect Ratio)
Multiple reference images → 12 (Reference Roles)
Same character across images → 13 (Character Consistency)
Merge multiple images → 14 (Image Blending)
Enhance/restore image → 15 (Upscaling)
Translate text in image → 16 (Translation)
Resources
references/
guide.md - Complete prompting guide with 16 techniques, examples, and patterns. Load this file when constructing prompts to access specific technique details and examples.
