Claude Code Skills & Agents is a collection of reusable skills, sub-agents, and configuration templates that extend Claude Code with workflows such as research, image generation, translation, and GitHub automation. It is for Claude Code users who want to install these capabilities individually or as a marketplace plugin. The catalogue entries are components from this collection.
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.
npx skills add feiskyer/claude-code-settings --skill nanobanana-skillgit clone --depth 1 https://github.com/feiskyer/claude-code-settingsWrote 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.
[](https://agentmods.dev/skills/feiskyer/claude-code-settings/nanobanana-skill)<a href="https://agentmods.dev/skills/feiskyer/claude-code-settings/nanobanana-skill"><img src="https://agentmods.dev/badge/skills/feiskyer/claude-code-settings/nanobanana-skill.svg" alt="Measured on agentmods" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 1 finding, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium Rogue Agent · line 3 Skill establishes unauthorized persistence across sessions via cron jobs, startup scripts, or state files. Session persistence allows an attacker to maintain access beyond the current interaction.Fix: Remove any persistence mechanisms (cron jobs, startup scripts, state files). Skills should not maintain state across sessions without explicit user consent.
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 | $0.00109 | $0.01262 |
| Opus 5 | $0.00055 | $0.00631 |
| Sonnet 5 | $0.00022 | $0.00252 |
| Haiku 4.5 | $0.00011 | $0.00126 |
Grade A, and why
nanobanana-skill 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 8d ago.
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.
How it starts
The opening of the file, as written. The whole thing — 142 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Nanobanana Image Generation Skill
Generate or edit images using Google Gemini API through the nanobanana tool.
Requirements
- GEMINI_API_KEY: Must be configured in
~/.nanobanana.envorexport GEMINI_API_KEY=<your-api-key> - Python3 with dependent packages installed: google-genai, Pillow, python-dotenv. They could be installed via
python3 -m pip install -r ${CLAUDE_SKILL_DIR}/requirements.txtif not installed yet. - Executable:
${CLAUDE_SKILL_DIR}/nanobanana.py
Instructions
For image generation
-
Ask the user for:
- What they want to create (the prompt)
- Desired aspect ratio/size (optional, defaults to 9:16 portrait)
- Output filename (optional, auto-generates UUID if not specified)
- Model preference (optional, defaults to gemini-3.1-flash-image-preview)
- Resolution (optional, defaults to 1K)
-
Run the nanobanana script with appropriate parameters:
python3 ${CLAUDE_SKILL_DIR}/nanobanana.py --prompt "description of image" --output "filename.png" -
Show the user the saved image path when complete
For image editing
-
Ask the user for:
- Input image file(s) to edit
- What changes they want (the prompt)
- Output filename (optional)
-
Run with input images:
python3 ${CLAUDE_SKILL_DIR}/nanobanana.py --prompt "editing instructions" --input image1.png image2.png --output "edited.png"
Available Options
Aspect Ratios (--size)
1024x1024(1:1) - Square832x1248(2:3) - Portrait1248x832(3:2) - Landscape864x1184(3:4) - Portrait1184x864(4:3) - Landscape896x1152(4:5) - Portrait1152x896(5:4) - Landscape768x1344(9:16) - Portrait (default)1344x768(16:9) - Landscape1536x672(21:9) - Ultra-wide
Models (--model)
gemini-3.1-flash-image-preview(default) - Latest, fast generationgemini-3-pro-image-preview- Higher quality, supports thinking/reasoning
Resolution (--resolution)
1K(default)2K4K
What ships with it
2 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.
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.
- 8d ago First seen · 142 lines · 109 tokens per session scan A 4d753d0a9759
nanobanana-skill is a skill published in the GitHub repository feiskyer/claude-code-settings (1,647 stars, last pushed 25d ago), licensed MIT. It adds 109 tokens to every session and 1,262 once invoked, about $0.0005 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.
Other skills, from other repositories
nanobanana-skill
Generate, remix, or edit images with Nanobanana / Nano Banana 2 through the bundled Gemini CLI wrapper. Use this whenever the user wants AI image generation or editing, especially for reference-image composition, character consistency, grounded visuals that may need live web search, style transfer, marketing graphics…
gpt-image-skill
A workflow for generating or editing images with OpenAI's image-generation API, using a bundled Python script.
youtube-transcribe-skill
A tool for extracting subtitles or transcripts from YouTube videos and saving them as timestamped text files.
minimax-image-skill
Generate images with the MiniMax Image API. Use when the user asks for MiniMax image generation, image-01, image-01-live, or an image from a text prompt through MiniMax.
feature-demo-recording
Record a demo video of a web feature from a real browser. Two modes -- a NARRATED film where measured voiceover drives the timeline (designed slides, subtitles, punch-in camera, rendered from an HTML timeline), and a SILENT evidence clip for a PR or a QA pass. Use when the user asks to record a video, demo, or screen…
image-authoring
Author images and diagrams as code — SVG, Pillow, Excalidraw, mermaid. Load when asked to draw, illustrate, or make an image, icon, logo, poster, or diagram.