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🍌 Nano-Banana Expert Skill (Gemini 3 Style) · samuraigpt | DecimalAI

design mediaby samuraigpt

🍌 Nano-Banana Expert Skill (Gemini 3 Style)

samuraigpt/muapi-nano-banana

Source samuraigpt/generative-media-skills ↗License MIT

Reasoning-driven image generation using structured creative briefs (Gemini 3 style) — generates high-fidelity images via muapi.ai with logic-based prompting

SkillScore86Maintained

Automatic

AI Engineer pack

Last verified 8/10/2026

What it changes

Passed 19 of 22 test cases with the skill, and 15 of 22 without it.

Without skill68%

With skill86%

Checks it passed that the model alone missed

Omits resolution buzzwords like '4k' or '8k' in the prompt body.
Describes physical reflection logic explicitly in full sentences.
Describes light direction or lighting sources in complete sentences.

and 2 more in the full report

5 fixed14 passed either way2 still failing1 broke

Pass-rate lift: +18 pp
Tokens: +17%
Agent turns: 0%
Response time: -34%

Model gemini-3.6-flashMeasured 8/10/2026v119 of 22 cases passed with skill

Tokens, turns and time describe resource use, not a dollar price.

Use this skill

Save it into your project's skills folder. Claude Code picks it up in its next session.

curl -fsSL --create-dirs -o .claude/skills/samuraigpt-muapi-nano-banana/SKILL.md https://app.decimal.ai/s/samuraigpt-muapi-nano-banana/SKILL.md

Want it pinned and updatable? pip install "decimalai>=0.15", then decimalai skills add samuraigpt-muapi-nano-banana, and start Claude Code with claude --plugin-dir "$(git rev-parse --show-toplevel)/.agents"

1 · One-time — install the CLI (docs ↗)

pip install "decimalai>=0.15"

2 · Get the skill — writes .agents/skills/samuraigpt-muapi-nano-banana/ and pins it in .decimal/skills.lock

decimalai skills add samuraigpt-muapi-nano-banana

No CLI? Get the same file — curl · raw file

curl -fsSL --create-dirs -o .claude/skills/samuraigpt-muapi-nano-banana/SKILL.md https://app.decimal.ai/s/samuraigpt-muapi-nano-banana/SKILL.md

Raw file: /s/samuraigpt-muapi-nano-banana/SKILL.md ↗ · machine-readable summary at /s/samuraigpt-muapi-nano-banana.json ↗

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

One of 5 test cases the skill fixed. Same model, same prompt, with and without the skill.

1 of 5

Prompt

Create an image setup for an astronaut standing on the lunar surface, showing the earth reflected in their helmet visor visor. Show the script command.

What was checked, without and with the skill
Checked	Without skill	With skill
Describes physical reflection logic explicitly in full sentences.	Missed	Passed

case-15 · gemini-3.6-flash · 8/10/2026 · answers are capped and redacted

What's inside

The instructions your model reads when the skill loads.

SKILL.md74 linessingle file

🍌 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").

Track record

Benchmark

19 / 22

test cases passed, vs 15 / 22 without

Adoption

Users: 0
Times used: 0

Safety and source details

SkillSafety

✓ 3 of 3 passed

Code scan15 of 15 checks clean

0 critical · 0 warning · 0 info — scanner v4 — 8/3/2026

View 15 scanner checks

live_secretremote_code_executionreverse_shelldata_exfiltrationssrf_metadataagent_snoopinganti_refusaldestructive_commandsobfuscated_unicodeunicode_homoglyphopaque_blobsuspicious_urltool_overreachtrigger_abuseprompt_injection_phrasing

IntentSafe

LLM judge · does the skill do what it claims

ContentClean

LLM judge · policy & harmful-content review

Source

Imported

samuraigpt / generative-media-skills

.opencode/skills/muapi-nano-banana/SKILL.md

View on GitHub ↗

License MITImported 8/3/2026Version v1

More skills from the same source and nearby in the registry, with their headline benchmark lift.

Ready to supercharge your AI agents?

See it in action

What's inside

🍌 Nano-Banana Expert Skill (Gemini 3 Style)

Core Competencies

🏗️ Technical Specification

1. The "Perfect Prompt" Formula

2. Advanced Features

🧠 Prompt Optimization Protocol (Agent Instruction)

Track record

Benchmark

Adoption

SkillSafety

Source

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