nano-banana-prompting

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)

1. Output Type - What kind of image?
2. Photo/realistic
3. Illustration/artistic
4. Infographic/educational
5. Product shot/commercial
6. UI mockup/design

1. Subject - Who or what is the main focus?
2. Person (with or without reference)
3. Object/product
4. Scene/environment
5. 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:

1. Loading references/guide.md to access technique details
2. Applying relevant techniques based on Step 3 selection
3. Cross-checking against guide examples for proper formatting
4. Including negative prompts if needed (Technique 10)
5. Specifying aspect ratio/resolution if required (Technique 11)

Prompt Construction Checklist

• [ ] Subject clearly defined
• [ ] Action/pose specified (if applicable)
• [ ] Location/background described
• [ ] Style/aesthetic anchored
• [ ] Technical specs included (aspect ratio, lighting, camera)
• [ ] Text integration specified (if needed)
• [ ] Negative prompts added (if needed)
• [ ] Reference image roles assigned (if using references)

Step 5: Present and Iterate

Present the generated prompt to the user with:

1. The prompt - Ready to use
2. Technique explanation - Why this structure was chosen
3. 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.