🍌 Nano-Banana Expert Skill (Gemini 3 Style)
A specialized skill for AI Agents to leverage "Reasoning-Driven" image generation.
Based on the advanced prompting architecture of Google's Gemini 3 (Nano Banana Pro), this skill moves beyond keyword stuffing to structured, logic-based creative briefs.
Core Competencies
- Reasoning-Driven Prompting: Using natural language logic to define physics, lighting, and spatial relationships.
- Structured Creative Briefs: Implementing the "Perfect Prompt" formula:
Subject + Action + Context + Composition + Lighting.
- Text Rendering Precision: Explicitly defining typography and signifiers for legible text integration.
- Contextual Grounding: Using "Search Grounding" logic (simulated) to anchor generations in real-world accuracy.
🏗️ Technical Specification
1. The "Perfect Prompt" Formula
| Component |
Description |
Example |
| Subject |
Detailed entity description |
"A stoic robot barista with exposed copper wiring" |
| Action |
Dynamic interaction |
"Pouring a latte art leaf with mechanical precision" |
| Context |
Environment & Atmosphere |
"Inside a neon-lit cyberpunk cafe at midnight" |
| Composition |
Camera & Lens choice |
"Close-up, 85mm lens, f/1.8 aperture" |
| Lighting |
Mood & Direction |
"Volumetric blue rim light, warm cafe glow" |
| Style |
Aesthetic anchor |
"Cinematic, photorealistic, 4K production value" |
2. Advanced Features
- Negative Constraint Logic: Instead of "no blurry," use "Ensure sharp focus on the subject's eyes."
- Identity Consistency: (Simulated) "Maintain consistent facial structure across variations."
- Text Integration: Use double quotes for specific text:
The sign reads "OPEN 24/7".
🧠 Prompt Optimization Protocol (Agent Instruction)
Before calling the script, the Agent MUST rewrite the user's prompt into a logic-driven Reasoning Brief:
- NO KEYWORD SOUP: Remove "8k, masterpiece, ultra-detailed." Use full, descriptive sentences.
- PHYSICAL CONSISTENCY: Describe how elements interact (e.g., "The light from the crystal shards casts caustic patterns across the obsidian floor").
- TEXT PRECISION: If the user wants text, define it precisely:
featuring a sign that says "STORE NAME" in a weathered serif font.
- OPTICAL DIRECTIVES: Specify lens behavior: Shallow Depth of Field (f/1.8), Macro Lens, Anamorphic Flare.
🚀 Protocol: Using Nano-Banana
Step 1: Define the Creative Logic
Provide the agent with a subject and a specific scenario.
Step 2: Invoke the Script
The generate-nano-art.sh script translates the logic into a structured Gemini 3-style prompt.
# Generating a reasoning-driven image
bash scripts/generate-nano-art.sh \
--subject "a glass chess piece" \
--action "shattering into liquid shards" \
--context "on a obsidian table" \
--style "macro photography"
⚠️ Constraints & Guardrails
- No Keyword Soup: MANDATORY - Do not use "trending on artstation, masterpiece, 8k". Use natural language descriptions.
- Physics Logic: Ensure the prompt describes physically possible lighting and reflection interactions.
- Full Sentences: The model parses relationships; use "light reflecting off the water" instead of "water, reflection".
⚙️ Implementation Details
This skill applies a "Logic Wrapper" around the core/media/generate-image.sh primitive, converting fragmented inputs into a coherent, reasoning-ready narrative prompt.
1---2name: muapi-nano-banana3description: Reasoning-driven image generation using structured creative briefs (Gemini 3 style) — generates high-fidelity images via muapi.ai with logic-based prompting4---56# 🍌 Nano-Banana Expert Skill (Gemini 3 Style)78**A specialized skill for AI Agents to leverage "Reasoning-Driven" image generation.**9Based on the advanced prompting architecture of Google's Gemini 3 (Nano Banana Pro), this skill moves beyond keyword stuffing to structured, logic-based creative briefs.1011## Core Competencies12131. **Reasoning-Driven Prompting**: Using natural language logic to define physics, lighting, and spatial relationships.142. **Structured Creative Briefs**: Implementing the "Perfect Prompt" formula: `Subject + Action + Context + Composition + Lighting`.153. **Text Rendering Precision**: Explicitly defining typography and signifiers for legible text integration.164. **Contextual Grounding**: Using "Search Grounding" logic (simulated) to anchor generations in real-world accuracy.1718---1920## 🏗️ Technical Specification2122### 1. The "Perfect Prompt" Formula2324| Component | Description | Example |25| :--- | :--- | :--- |26| **Subject** | Detailed entity description | "A stoic robot barista with exposed copper wiring" |27| **Action** | Dynamic interaction | "Pouring a latte art leaf with mechanical precision" |28| **Context** | Environment & Atmosphere | "Inside a neon-lit cyberpunk cafe at midnight" |29| **Composition** | Camera & Lens choice | "Close-up, 85mm lens, f/1.8 aperture" |30| **Lighting** | Mood & Direction | "Volumetric blue rim light, warm cafe glow" |31| **Style** | Aesthetic anchor | "Cinematic, photorealistic, 4K production value" |3233### 2. Advanced Features34- **Negative Constraint Logic**: Instead of "no blurry," use "Ensure sharp focus on the subject's eyes."35- **Identity Consistency**: (Simulated) "Maintain consistent facial structure across variations."36- **Text Integration**: Use double quotes for specific text: `The sign reads "OPEN 24/7"`.3738---3940## 🧠 Prompt Optimization Protocol (Agent Instruction)4142**Before calling the script, the Agent MUST rewrite the user's prompt into a logic-driven Reasoning Brief:**43441. **NO KEYWORD SOUP**: Remove "8k, masterpiece, ultra-detailed." Use full, descriptive sentences.452. **PHYSICAL CONSISTENCY**: Describe how elements interact (e.g., "The light from the crystal shards casts caustic patterns across the obsidian floor").463. **TEXT PRECISION**: If the user wants text, define it precisely: `featuring a sign that says "STORE NAME" in a weathered serif font`.474. **OPTICAL DIRECTIVES**: Specify lens behavior: *Shallow Depth of Field (f/1.8)*, *Macro Lens*, *Anamorphic Flare*.4849---5051## 🚀 Protocol: Using Nano-Banana5253### Step 1: Define the Creative Logic54Provide the agent with a subject and a specific scenario.5556### Step 2: Invoke the Script57The `generate-nano-art.sh` script translates the logic into a structured Gemini 3-style prompt.5859```bash60# Generating a reasoning-driven image61bash scripts/generate-nano-art.sh \62 --subject "a glass chess piece" \63 --action "shattering into liquid shards" \64 --context "on a obsidian table" \65 --style "macro photography"66```6768---6970## ⚠️ Constraints & Guardrails7172- **No Keyword Soup**: **MANDATORY** - Do not use "trending on artstation, masterpiece, 8k". Use natural language descriptions.73- **Physics Logic**: Ensure the prompt describes *physically possible* lighting and reflection interactions.74- **Full Sentences**: The model parses relationships; use "light reflecting off the water" instead of "water, reflection".7576---7778## ⚙️ Implementation Details79This skill applies a "Logic Wrapper" around the `core/media/generate-image.sh` primitive, converting fragmented inputs into a coherent, reasoning-ready narrative prompt.
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