Agent skill

Blog Cover Generator

by Varnan-Tech in Varnan-Tech/opendirectory

A skill your agent uses when the user asks to generate a blog cover image, thumbnail, or article header.

MITAuto-check passedMedia & Creative

Install Blog Cover Generator

skills CLI
$ npx skills add Varnan-Tech/opendirectory --skill blog-cover-generator -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install Varnan-Tech/opendirectory blog-cover-generator --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/Varnan-Tech/opendirectory.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/blog-cover-image-cli .claude/skills/blog-cover-generator && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
blog-cover-generator
GitHub stars
674
Token cost
~1k tokens
SKILL.md length
412 words
Files
2
Skills in repo
61
Repo updated
First seen
Licence
MIT

At a glance

A skill your agent uses when the user asks to generate a blog cover image, thumbnail, or article header.

  • Works in 4 steps: Logo Fetching: It fetches logos from… → References: It loads curated reference… → Grounding: It has googleSearch tools… → …
  • The user asks to generate a blog cover image
  • SKILL.md covers Setup & Configuration, Usage: Generating an Image, How It Works Under the Hood and Edge Cases / Troubleshooting
  • Calls npx and npm

What it does

Blog Cover Generator is an agent skill from Varnan-Tech/opendirectory. Use when the user asks to generate a blog cover image, thumbnail, or article header. Automatically uses modern typography, brand logos, and Google Search grounding to create beautiful 16:9 images with Gemini 3.1 Flash Image Preview.

Its SKILL.md is about 1k tokens, which your agent loads only when the skill is triggered. The skill folder holds 1 other file (for example `README.md`).

It sits in Media & Creative, covering Social media graphics, Logo and visual identity and Web search. It works with Vercel. The repository describes itself as: AI Agent Skills built for Founders who hate Marketing. The licence is MIT.

When your agent uses it

  • The user asks to generate a blog cover image
  • Tasks that involve Social media graphics
  • Tasks that involve Logo and visual identity

Example prompts

  • “/blog-cover-generator”

Requirements

  • Node.js
  • A credential in YOUR_GEMINI_API_KEY

Workflow steps

4 steps, taken from the first numbered list in SKILL.md.

  1. Logo Fetching: It fetches logos from Brandfetch and processes them via sharp.
  2. References: It loads curated reference images from its examples/ directory to ensure the output is always a clean, minimalist white…
  3. Grounding: It has googleSearch tools enabled, meaning if the title relates to a recent event, Gemini can look it up before generating the…
  4. Text Enforcement: It forces Gemini to output the exact title string using typographic placement rules.

What it can do on your machine

Read from SKILL.md and the folder at commit 62e437a. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    Shell commands in SKILL.md call:

    • npx
    • npm

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md. Its commands use npx and npm, which can reach the network depending on how they are called.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Blog Cover Generator loads about 1k tokens when it runs. Until then it costs about 63 tokens; SKILL.md has 412 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~63
When it runs · the whole SKILL.md, loaded when a task matches
~1k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from Varnan-Tech/opendirectory at commit 62e437a, republished under its MIT licence (© Varnan-Tech). 412 words, ~1,006 tokens.

Download SKILL.mdSave it as .claude/skills/blog-cover-generator/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.
name
blog-cover-generator
description
Use when the user asks to generate a blog cover image, thumbnail, or article header. Automatically uses modern typography, brand logos, and Google Search grounding to create beautiful 16:9 images with Gemini 3.1 Flash Image Preview.

Blog Cover Generator Skill

This skill provides AI agents with the ability to generate stunning, minimalist, technical blog cover images using the blog-cover-image-cli. The CLI leverages Gemini 3.1 Flash Image Preview, automatically fetches brand logos from domains, uses local aesthetic reference images, and employs Google Search grounding to inject real-time context.

Setup & Configuration

Agent Pre-requisites: Before using this tool, verify it is installed. If blog-cover-cli --help fails, install it globally:

bash
npm install -g blog-cover-image-cli

If the user wants you to generate an image and you haven't set up the API key yet, you must first configure the CLI using a Gemini API Key. The CLI stores this securely via the conf package.

bash
# 1. Set your Gemini API Key (Required for image generation)
npx -p blog-cover-image-cli blog-cover-cli config set-key <YOUR_GEMINI_API_KEY>

# 2. Set your Brandfetch Client ID (Required to fetch high-res logos)
npx -p blog-cover-image-cli blog-cover-cli config set-brandfetch-id <YOUR_BRANDFETCH_CLIENT_ID>

# Check your keys (masked)
npx -p blog-cover-image-cli blog-cover-cli config get-key
npx -p blog-cover-image-cli blog-cover-cli config get-brandfetch-id

Usage: Generating an Image

When a user asks for a cover image (e.g., "Create a cover image for my blog about Vercel v0"), you should use the generate command.

bash
npx -p blog-cover-image-cli blog-cover-cli generate -t "The Title of the Blog Post" -l "example.com"
Arguments
  • -t, --title <text>: (Required) The title text to display on the cover image. Do not use excessively long titles (keep it under 3 lines of text visually).
  • -l, --logo <domain>: (Optional but recommended) The domain to fetch the brand logo from (e.g., vercel.com, google.com, cursor.com). The CLI automatically converts WebP/SVG/AVIF to PNG for compatibility.
  • -o, --output <path>: (Optional) The file path where the generated image will be saved. If omitted, the CLI automatically saves it to an output/ directory in the current working folder (e.g., ./output/vercel-cover.png).
Examples

Example 1: Cursor

bash
npx -p blog-cover-image-cli blog-cover-cli generate -t "Why Cursor is the Ultimate AI Code Editor" -l "cursor.com"

Example 2: Lovable

bash
npx -p blog-cover-image-cli blog-cover-cli generate -t "Building Apps in Minutes with Lovable" -l "lovable.dev"

Example 3: Custom Output Path

bash
npx -p blog-cover-image-cli blog-cover-cli generate -t "Mastering React in 2026" -l "reactjs.org" -o "./assets/react-cover.png"
Show full SKILL.md (176 more words)Show less

How It Works Under the Hood

As an agent, you should know what the CLI is doing so you can inform the user:

  1. Logo Fetching: It fetches logos from Brandfetch and processes them via sharp.
  2. References: It loads curated reference images from its examples/ directory to ensure the output is always a clean, minimalist white background with bold typography.
  3. Grounding: It has googleSearch tools enabled, meaning if the title relates to a recent event, Gemini can look it up before generating the image.
  4. Text Enforcement: It forces Gemini to output the exact title string using typographic placement rules.

Edge Cases / Troubleshooting

  • No API Key Error: If you see an API key error, run the config set-key command.
  • Logo Fetch Warning: If the CLI says Warning: Could not fetch logo, it will still generate the image but without the logo. You do not need to crash or stop.
  • Strict Modality Limits: Because it uses Gemini's experimental image models, generation may occasionally fail due to strict safety filters. If this happens, notify the user.

© Varnan-Tech, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 1 other file in skills/blog-cover-image-cli of Varnan-Tech/opendirectory.

  • SKILL.md
  • README.md

Open the folder on GitHubat commit 62e437a

Compare with similar skills

Blog Cover Generator next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Blog Cover Generator compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Blog Cover Generator this skillVarnan-Tech/opendirectory674—~1kAutomated safety check: PassMIT
OpenClaw Brand Identityopenclaw/clawhub9.5k—~447Automated safety check: PassMIT
Popular Web DesignsTommy-yw/RunbookHermes5461 repos~2.4kAutomated safety check: PassMIT
Brand and Design Toolkitnextlevelbuilder/ui-ux-pro-max-skill134k1 repos~3.5kAutomated safety check: PassMIT
Anthropic Brand Stylinganthropics/skills180k30 repos~559Automated safety check: PassApache-2.0
Web Asset Generatoralonw0/web-asset-generator5141 repos~6.6kAutomated safety check: PassMIT

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Works with

Questions about Blog Cover Generator

What does Blog Cover Generator do?

A skill your agent uses when the user asks to generate a blog cover image, thumbnail, or article header. Blog Cover Generator is an agent skill from Varnan-Tech/opendirectory. Use when the user asks to generate a blog cover image, thumbnail, or article header.

When should I use Blog Cover Generator?

Blog Cover Generator fits situations like: the user asks to generate a blog cover image; tasks that involve Social media graphics; tasks that involve Logo and visual identity.

How do I install Blog Cover Generator in Claude Code?

Run `npx skills add Varnan-Tech/opendirectory --skill blog-cover-generator -a claude-code`. Or copy the skill folder (skills/blog-cover-image-cli in Varnan-Tech/opendirectory) into .claude/skills/blog-cover-generator in your project. Claude Code loads it when a task matches its description.

How do I install Blog Cover Generator in Codex?

Run `npx skills add Varnan-Tech/opendirectory --skill blog-cover-generator -a codex`. Or copy the skill folder (skills/blog-cover-image-cli in Varnan-Tech/opendirectory) into .agents/skills/blog-cover-generator in your project. Codex loads it when a task matches its description.

Can I use Blog Cover Generator in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add Varnan-Tech/opendirectory --skill blog-cover-generator -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/blog-cover-generator, .gemini/skills/blog-cover-generator, .github/skills/blog-cover-generator and .opencode/skills/blog-cover-generator in your project.

What does Blog Cover Generator need to run?

Going by SKILL.md and its folder, Blog Cover Generator needs the command-line tools its instructions call (npx and npm). Our summary lists: Node.js; A credential in YOUR_GEMINI_API_KEY.

Does Blog Cover Generator access the network?

SKILL.md contains no URLs. Its commands use npx and npm, which can reach the network depending on how they are called. This is read from the text; nothing was executed.

Is Blog Cover Generator safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Blog Cover Generator use?

Blog Cover Generator is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Blog Cover Generator use?

About 1k tokens (SKILL.md is roughly 4k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Blog Cover Generator?

Skills that share tags, products or a category with Blog Cover Generator: OpenClaw Brand Identity (openclaw/clawhub, 9.5k stars), Popular Web Designs (Tommy-yw/RunbookHermes, 546 stars), Brand and Design Toolkit (nextlevelbuilder/ui-ux-pro-max-skill, 134k stars) and Anthropic Brand Styling (anthropics/skills, 180k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Blog Cover Generator?

Varnan-Tech (a GitHub organization) maintains it in Varnan-Tech/opendirectory, which has 674 GitHub stars. The repository holds 61 skills in this directory. The repository was last updated on August 16, 2026.

Source: Varnan-Tech/opendirectory on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.