banner-creator

A tool for creating AI-generated banners, such as headers or cover images, in formats for sites and social networks.

In plain words
What is it for?
Use it to discuss a banner’s format and style, generate options, revise them, and crop them for specific platforms.
Why use it?
It helps produce banner variations and adapt one design to the different shapes required by GitHub, Twitter, LinkedIn, and similar platforms.

Plugin for Claude Code

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.

Claude Code
/plugin marketplace add ReScienceLab/opc-skills
agentmods
npx agentmods add plugins/resciencelab/opc-skills/banner-creator
Clone the repo
git clone --depth 1 https://github.com/ReScienceLab/opc-skills

Made for: Claude Code.

Per session not measured What this adds to a session before it is invoked.
When invoked not measured The manifest loads nothing itself; its 1 skill cost 57 tokens a session between them.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Security

Grade A, and why

banner-creator 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 3d 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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

skills/banner-creator/.claude-plugin/plugin.json · 27 lines

What it actually says

{
  "name": "banner-creator",
  "version": "1.0.0",
  "description": "Create banners using AI image generation. Discuss format/style, generate variations, iterate with user feedback, crop to target ratio for GitHub, Twitter, LinkedIn, etc.",
  "author": {
    "name": "ReScienceLab"
  },
  "homepage": "https://github.com/ReScienceLab/opc-skills/tree/main/skills/banner-creator",
  "repository": "https://github.com/ReScienceLab/opc-skills",
  "license": "MIT",
  "keywords": [
    "banner",
    "header",
    "hero image",
    "cover image",
    "create banner",
    "github banner",
    "twitter header",
    "readme banner"
  ],
  "skills": [
    "./SKILL.md"
  ],
  "commands": [
    "./scripts/"
  ]
}
Contents

What it installs

The manifest is a name and a version. 1 skill travel with it, and installing the plugin installs all of them — 57 tokens a session between them. Each is measured on its own page, and each can be installed alone.

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.

  1. 3d ago First seen · 27 lines scan A 9707e575235a

Subscribe to this mod's changes

banner-creator is a plugin published in the GitHub repository ReScienceLab/opc-skills (1,747 stars, last pushed yesterday), licensed Apache-2.0. Its token cost is not measured: this kind of file is read by the harness, not the model. 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.

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