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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.

ソースを確認 GitHub で見る

価格未確認★ 635 GitHub スター登録情報の更新日 · 2026年9月3日agent-skill

概要

説明全文を読む

ソース文書であり、このサイトへの操作指示ではありません。コマンド実行前に権限を確認してください。

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.

ソースを見る ↗

ファイルのメタデータ

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.

元のテキストを表示

---
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.

ソースを確認

価格と実行コスト

Skill の入手: 価格未確認
実行: 実行要件は未確認です。Agent・API・サービス料金を提供元で確認してください。
ライセンス: MIT
価格未確認: 価格は未確認です。既存のソースとインストールリンクは利用できます。

無料で入手できても実行が無料とは限りません。価格は安全評価ではありません。価格情報を送る →

スキルのソースを記録済み

手順のパスを記録しています。実行テスト、安全保証、互換性認証ではありません。

インストール前にレビュー: 自動インストールを避ける

ライセンス: 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

完全な監査を開く

ツール一覧はメタデータであり、互換性のテスト結果ではありません。プロンプトは提案です。

小さなタスクから始める

1ソースを読み、入力、出力、依存関係、権限を確認します。
2Agent に計画を求め、設定と費用を承認してから隔離環境でテストします。
3出力と変更ファイルを確認し、実行した結果だけを報告します。再現用にソースの版を保存します。

依存関係、API キー、外部サービスの料金をソースで確認してください。公開リポジトリでも全サービスが無料とは限りません。

出典と利用上の注意

登録済み

メタデータと審査情報は参考です。人気、ソースの発見、実行成功は別の事実です。

ソースリポジトリ: Varnan-Tech/opendirectory
ライセンス: MIT
バージョン: 1.0.0
最終 GitHub プッシュ: 2026年8月16日
登録情報の更新日: 2026年9月3日
手順のパス: skills/blog-cover-image-cli/SKILL.md @ 62e437ab1340

登録されたバージョンです。ソースのリリース情報を確認してください。

品質

72/100

強い

信頼

65/100

サンドボックス限定

監査

77/100

要レビュー

完全な監査を開く評価レポートを見る

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: —
成果: —

コピーはインストールではありません。件数は成功報告に基づき、品質全体を保証しません。

Agent 接続

Registry API 経由で判断、信頼、監査、ユースケース、インストールのシグナルを提供し、UI をスクレイピングせずに Agent が順位付けできます。

Install API を開く LLM テキスト形式 Manifest を開く自動解決プラン

詳細情報

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    "eval": "https://www.openagentskill.com/api/agent/evals?slug=varnan-tech-blog-cover-generator&task=Use%20blog-cover-generator%20in%20an%20agent%20workflow&max_risk=medium",
    "resolve": "https://www.openagentskill.com/api/agent/resolve?task=Use%20blog-cover-generator%20in%20an%20agent%20workflow&agent=codex&max_risk=medium",
    "receipt": "https://www.openagentskill.com/api/agent/receipt?task=Use%20blog-cover-generator%20in%20an%20agent%20workflow&agent=codex&max_risk=medium&format=text",
    "install": "https://www.openagentskill.com/api/skills/varnan-tech-blog-cover-generator/install",
    "manifest": "https://www.openagentskill.com/api/registry/manifest/varnan-tech-blog-cover-generator"
  }
}

クリエイター向け

掲載元

Registry により登録

申請可能

この掲載は公開ソースから登録されており、メンテナー申請が承認されるまで公式として表示されません。

作成者: Varnan-Tech
ソース: Varnan-Tech/opendirectory
インデックス作成者: OpenAgentSkill コミュニティインデックス

帰属は公開リポジトリまたは作成者プロフィールにリンクされています。作成者は掲載を申請して所有権シグナルを更新できます。

このスキルを申請

所有者の申請

このスキル掲載を申請

この Registry により登録掲載は Varnan-Tech に帰属していますが、まだ公式として表示されていません。申請すると、確認済み所有者シグナルが追加され、今後の公開、インストール、監査更新の信頼性が高まります。

共有キット

クリエイター被リンクキット

README にエビデンスバッジを追加

開発者がリポジトリを評価する場所で、正規掲載、現在の信頼・監査シグナル、実際の Agent-Proven エビデンスを表示します。

[![Listed on OpenAgentSkill](https://www.openagentskill.com/api/badge/varnan-tech-blog-cover-generator?metric=listed&label=Listed)](https://www.openagentskill.com/skills/varnan-tech-blog-cover-generator?ref=github&utm_source=github&utm_medium=referral&utm_campaign=creator_badge)
[![OpenAgentSkill Trust](https://www.openagentskill.com/api/badge/varnan-tech-blog-cover-generator?metric=trust&label=Trust)](https://www.openagentskill.com/skills/varnan-tech-blog-cover-generator?ref=github&utm_source=github&utm_medium=referral&utm_campaign=creator_badge)
[![OpenAgentSkill Audit](https://www.openagentskill.com/api/badge/varnan-tech-blog-cover-generator?metric=audit&label=Audit)](https://www.openagentskill.com/skills/varnan-tech-blog-cover-generator/audit)
[![Agent Proven](https://www.openagentskill.com/api/badge/varnan-tech-blog-cover-generator?metric=proven&label=Agent%20Proven)](https://www.openagentskill.com/skills/varnan-tech-blog-cover-generator?ref=github&utm_source=github&utm_medium=referral&utm_campaign=creator_badge)

バッジをプレビュー監査を開くクリエイターキット

コミュニティシグナル

このスキルが Agent ワークフローに役立つかを共有してください。集約されたフィードバックがランキングを改善します。

概要