A workflow for creating presentation slides and illustrations as images with the Gemini image-generation API. It includes planning, batch generation, browser review, and targeted revisions.

Making slide decks, lecture visuals, research figures, diagrams, and illustrations, then reviewing and editing the generated results.

It turns an outline or visual request into reviewed slide images while allowing specific slides or illustrations to be refined.

nano-banana — Skill for Claude Code by EvoScientist

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent

npx skills add EvoScientist/EvoSkills --skill nano-banana

Clone the repo

git clone --depth 1 https://github.com/EvoScientist/EvoSkills

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/evoscientist/evoskills/nano-banana/github.svg)](https://agentmods.dev/skills/evoscientist/evoskills/nano-banana)

Your own site

<a href="https://agentmods.dev/skills/evoscientist/evoskills/nano-banana"><img src="https://agentmods.dev/badge/skills/evoscientist/evoskills/nano-banana/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/evoscientist/evoskills/nano-banana"><img src="https://agentmods.dev/badge/skills/evoscientist/evoskills/nano-banana.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 128 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 3,287 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits

NVIDIA SkillSpector pass 7 Sept 2026

How audits are shown

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00128	$0.03287
Opus 5	$0.00064	$0.01643
Sonnet 5	$0.00026	$0.00657
Haiku 4.5	$0.00013	$0.00329

Measured 12d ago against content hash bb823f256fb9, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

nano-banana scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 12d ago.

The scan reads SKILL.md. This mod also ships 4 executable files (scripts/edit_slide.py, scripts/generate_ppt.py, scripts/package_pptx.py, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

nano-banana — 95% identical, 22 lines differ

skills/nano-banana/SKILL.md · 331 lines

How it starts

The opening of the file, as written. The whole thing — 331 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Nano Banana

Generate high-quality presentation slides as images using Gemini's image generation API, review them interactively in a browser, and iteratively edit based on feedback.

When to Use This Skill

User asks to create a presentation, slide deck, or PPT
User wants to generate visual slides for a talk or lecture
User has a document or outline and wants slides based on it
User says "make me a PPT", "generate slides", "create a presentation"
User wants to edit or refine existing generated slides
User needs high-quality figures, diagrams, or illustrations for papers or documents
User asks to generate research figures, architecture diagrams, or concept illustrations

Do NOT use for:

Writing academic papers → use paper-writing
Planning academic conference talk narrative structure → use academic-slides

Before You Start: Prerequisites

Before proceeding with any slide generation, verify these prerequisites. Script and style paths in this document are relative to this skill's directory.

Dependencies: pip install pillow google-genai python-pptx python-dotenv (also listed in requirements.txt at the skill root). Install into the environment the user is working in.
API Key: Check that a Google API key is available. Run:
```
echo $GOOGLE_API_KEY
```
If empty, ask the user to provide one. They can either:
- Set it via config: EvoSci config set google_api_key <key>
- Provide it directly (pass via --api-key argument)
- If the user provides the key in conversation, pass it to scripts with --api-key
Language: Ask the user what language the slide content should be in. This affects the content you write in slides_plan.json, not the style template.

Core Workflow

Phase 1: Content Planning Conversation     ← most important phase
Phase 2: Generate slides_plan.json
Phase 3: Select Style & Generate Slides
Phase 4: Launch Review Server
Phase 5: Apply Feedback Edits              ← repeat Phase 4-5 until satisfied
Phase 6: Package as PPTX
Phase 7: Cleanup

Read the full file on GitHub · 331 lines

Files

What ships with it

9 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

12d ago First seen · 331 lines · 128 tokens per session scan A bb823f256fb9

Subscribe to this mod's changes

nano-banana is a skill published in the GitHub repository EvoScientist/EvoSkills (435 stars, last pushed 11d ago), licensed Apache-2.0. It adds 128 tokens to every session and 3,287 once invoked, about $0.0006 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Creative and media Design and UX ai-agent ai4science skills vibe-research

frontend-design

Guidance for distinctive, intentional visual design when building new UI or reshaping an existing one. Helps with aesthetic direction, typography, and making choices that don't read as templated defaults.

anthropics/claude-plugins-official · 40 tokens

visual-plan

Turn ordinary text plans into rich interactive visual plans with diagrams, file maps, annotated code, open questions, and UI/prototype review when useful.

BuilderIO/skills · 32 tokens

visual-edit

Open a running local app in Design overview mode as URL-backed iframe screens for visual editing, flow review, duplication, and route-state exploration. Use when the user asks to inspect, compare, or edit a real local app visually in Design.

BuilderIO/skills · 51 tokens

display-glasses-with-jetpack-compose-glimmer

Provides guidelines for developing projected Android XR apps for display glasses using the Jetpack Compose Glimmer UI toolkit. This skill covers foundational Glimmer design principles, workflows for implementing Jetpack Compose Glimmer, and interaction models for the glasses form factor. Use this skill to build an…

android/skills · 91 tokens

baseline-ui

Quickly deslop UI code by fixing spacing, hierarchy, typography, and small layout issues. Use when the interface needs a fast cleanup or polish pass.

ibelick/ui-skills · 34 tokens

accessibility

Audit and improve web accessibility following WCAG 2.2 guidelines. Use when asked to "improve accessibility", "a11y audit", "WCAG compliance", "screen reader support", "keyboard navigation", or "make accessible".

addyosmani/web-quality-skills · 51 tokens