pr-visual

Generate infographic images from pull requests using Gemini, with Nano Banana Pro and Gemini 3 Flash

'Excalidraw' style:

'Clean' style:

Installation

npx pr-visual

Or install globally:

npm install -g pr-visual

Authentication

Option 1: Google OAuth (recommended)

pr-visual login

Opens browser to authenticate with your Google account. Uses your own Gemini quota.

Option 2: API Key

export GEMINI_API_KEY=your_key_here
pr-visual

Get a key at aistudio.google.com/apikey

Usage

Interactive Mode

pr-visual

Walks you through selecting what to visualize and which style to use.

Non-Interactive Mode

# Visualize branch diff
pr-visual --mode branch --yes

# Visualize staged changes
pr-visual --mode staged --yes

# Visualize a specific commit
pr-visual --mode commit --commit abc1234 --yes

# Custom output path
pr-visual --mode branch --yes --output my-visual.png

Visual Styles

pr-visual --mode branch --style excalidraw --yes

Style	Description
clean	Corporate/PowerPoint style (default)
excalidraw	Hand-drawn whiteboard aesthetic
minimal	Simple, icon-heavy, lots of whitespace
tech	Dark mode with neon accents
playful	Colorful and fun with illustrations

Custom Prompts

Skip diff analysis and provide your own prompt:

pr-visual --prompt "Create an infographic showing a login flow" --yes
pr-visual --prompt-file my-prompt.txt --yes

GitHub Action

Automatically generate and post infographics on PRs.

Setup

1. Add GEMINI_API_KEY to your repository secrets
2. Create .github/workflows/pr-visual.yml:

name: PR Visual

on:
  pull_request:
    types: [opened, synchronize]

jobs:
  visualize:
    runs-on: ubuntu-latest
    permissions:
      contents: write
      pull-requests: write

    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - uses: gitethanwoo/pr-visual@v1
        with:
          gemini-api-key: ${{ secrets.GEMINI_API_KEY }}
          style: clean  # optional

The action will:

• Use Gemini CLI to intelligently analyze the PR (can read files for context, not just the diff)
• Generate an infographic from the analysis
• Upload it to a GitHub Release (no commits to your PR branch!)
• Post a comment with the image and a collapsible prompt/history section

CLI Reference

pr-visual [command] [options]

Commands:
  login     Login with Google OAuth
  logout    Clear stored credentials
  status    Show authentication status
  upgrade   Upgrade to the hosted version
  (none)    Generate infographic (default)

Options:
  -h, --help              Show help
  -m, --mode <mode>       Diff mode: branch, commit, staged, unstaged
  -s, --style <style>     Visual style: clean, excalidraw, minimal, tech, playful
  -p, --prompt <text>     Custom prompt (bypasses diff analysis)
  --prompt-file <path>    Read prompt from file
  -c, --commit <hash>     Commit hash (for mode=commit)
  -y, --yes               Skip confirmation prompt
  -o, --output <path>     Output file path

License

ISC