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blog-cover-generator

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.

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Precio sin confirmar★ 635 Estrellas de GitHubRegistro actualizado · 3 sept 2026agent-skill

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Documentación de origen, no instrucciones para este sitio. Revisa los permisos antes de ejecutar comandos.

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:

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.

# 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.

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

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

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

npx -p blog-cover-image-cli blog-cover-cli generate -t "Mastering React in 2026" -l "reactjs.org" -o "./assets/react-cover.png"

How It Works Under the Hood

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

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

Ver fuente ↗

Metadatos del archivo

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.

Ver texto original

---
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"
```

## 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.

Revisar el código fuente

Precio y costes de ejecución

Obtener el skill: Precio sin confirmar
Ejecutarlo: Requisitos sin confirmar. Consulta los costes del agente, API y servicios en la fuente.
Licencia: MIT
Precio sin confirmar: No hemos confirmado el precio. Los enlaces existentes al código y a la instalación siguen disponibles.

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Fuente del skill registrada

La ruta de instrucciones está registrada. No implica pruebas de ejecución, seguridad ni compatibilidad.

Revisar antes de instalar: Evitar instalación automática

Licencia: MIT

Dependency or permission surface needs review
Permission surface may require sandboxing
Quality score needs review
Permission surface needs review: secrets or environment access, shell or command execution
Dependency/runtime risk: command execution surface, credential or environment access
Permission surface: secrets or environment access, shell or command execution

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Empieza con una tarea pequeña

1Lee la fuente y confirma entradas, resultados, dependencias y permisos.
2Pide un plan al agente. Aprueba la configuración y los costes antes de probar en un entorno aislado.
3Comprueba resultados y archivos modificados. Informa solo de lo ejecutado y conserva la revisión de la fuente.

Consulta dependencias, claves API y costes externos en la fuente. Un repositorio público no implica servicios gratuitos.

Fuente y notas de uso

Indexado

Los metadatos y revisiones son orientativos. Popularidad, descubrimiento y ejecución correcta son hechos distintos.

Repositorio fuente: Varnan-Tech/opendirectory
Licencia: MIT
Versión: 1.0.0
Último push de GitHub: 16 ago 2026
Registro actualizado: 3 sept 2026
Ruta de instrucciones: skills/blog-cover-image-cli/SKILL.md @ 62e437ab1340

Versión declarada en el registro; consulta las versiones de la fuente.

Calidad

72/100

Sólido

Confianza

65/100

Solo sandbox

Auditoría

77/100

Requiere revisión

Abrir auditoría completa Ver informe de evaluación

Dependency or permission surface needs review
Permission surface may require sandboxing
Quality score needs review
Permission surface needs review: secrets or environment access, shell or command execution
Dependency/runtime risk: command execution surface, credential or environment access
Permission surface: secrets or environment access, shell or command execution

Verified installs: —
Resultados: —

Copiar no es instalar. Los recuentos requieren un informe de instalación correcta, no garantizan calidad general.

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Más detalles

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Creador: Varnan-Tech
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Esta ficha Indexado por Registry se atribuye a Varnan-Tech, pero aún no está marcada como oficial. Reclámala para añadir una señal de propietario verificado y hacer más fiables futuras actualizaciones de lanzamiento, instalación y auditoría.

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