GitHub - cased/supersonic: Streamlined GitHub PR automation for modern applications in Python, with a high-level and extremely customizable API.

Supersonic

Streamlined GitHub PR automation for modern applications. Supersonic is a high-level API for creating and managing Pull Requests, designed specifically for AI and SaaS applications that need to propose changes to user repositories.

Why Supersonic?

Modern AI and SaaS applications often need to propose changes to user repositories—whether it's AI-suggested improvements, automated documentation updates, or configuration changes. However, creating Pull Requests programmatically through the GitHub API can be complex and error-prone.

Supersonic solves this:

Simple, High-Level API: Create PRs with a single function call, using files or plain text content
Safe Defaults: All changes are created as PRs, allowing users to review before merging
Enterprise Ready: Full support for GitHub Enterprise and custom base URLs
Excessively customizable: Full control over PR creation, set draft mode, reviewers, labels, etc.
Best for apps, useful for scripts too: Plug it into your SaaS app and delight your users. Or automate internal workflows.

Common use cases:

AI applications suggesting code improvements
Documentation generators keeping docs in sync with code
Configuration management tools proposing config updates
Any service that needs to propose changes to user repositories

We use this at Cased to support our DevOps automations.

Installation

# Using pip with uv (recommended)
uv pip install supersonic

# Development installation
git clone https://github.com/cased/supersonic
cd supersonic

uv venv && source .venv/bin/activate
uv pip install -r requirements-dev.txt
uv pip install -e .

Quick Start

Easiest Start

First an idea of what Supersonic can do.

Say you just want to create a PR to update a file. You can do this with create_pr_from_content, just by providing the content and the upstream file path where you want the content to go.

from supersonic import Supersonic

my_supersonic = Supersonic("your-github-token")

# Create a PR to update a file
pr_url = my_supersonic.create_pr_from_content(
    repo="user/repo",
    content="print('hello world')",
    upstream_path="hello.py"
)

print(f"Created PR: {pr_url}")

Working with Files and Content

Supersonic provides four main ways to create PRs, each designed for different use cases. You can customize everything with keyword arguments, demonstrated below.

1. Single File Updates (`create_pr_from_file`)

When you have a local file that you want to propose as a change:

pr_url = my_supersonic.create_pr_from_file(
    repo="user/repo",
    local_file_path="local/config.json",  # Path to your local file
    upstream_path="config/settings.json",  # Where it should go in the repo
    title="Update configuration",  # Optional
    base_branch="develop"  # Optional, customize target branch
)

This is ideal for:

Uploading configuration files
Proposing documentation changes from local files
Any single-file updates where you have the file locally

2. Single Content Updates (`create_pr_from_content`)

When you have content in memory that you want to propose as a change:

pr_url = my_supersonic.create_pr_from_content(
    repo="user/repo",
    content="print('hello')",  # The actual content
    upstream_path="src/hello.py",  # Where to put it in the repo
    title="Add hello script",  # Optional
    description="Adds a simple hello world script",  # Optional
    draft=False,  # Optional, create as draft PR
    labels=["enhancement"],  # Optional labels
    reviewers=["username"]  # Optional reviewers
)

This is perfect for:

Generated content (e.g., from AI)
Content manipulated in memory
Simple text changes without needing a file

3. Multiple Content Updates (`create_pr_from_multiple_contents`)

Use when you have multiple pieces of content in memory to update at once. Now contents is a dictionary, with the key being the upstream file path, and the value being the content. You can pass multiple keys, one for each file.

pr_url = my_supersonic.create_pr_from_multiple_contents(
    repo="user/repo",
    contents={
        "config/settings.json": '{"debug": true}',
        "README.md": "# Updated Docs\n\nNew content here"
    },
    title="Update configuration and docs",  # Optional
    description="""
    This PR includes two changes:
    1. Updated debug settings
    2. Refreshed documentation
    """,  # Optional
    labels=["config", "docs"],  # Optional
    reviewers=["your-tech-lead", "somebody-else"]  # Optional
)

Great for:

Batch updates to multiple files
Generated content for multiple files
Configuration changes across services
Documentation updates across multiple files

4. Multiple File Updates (`create_pr_from_files`)

Use if you have multiple local files to propose as changes. You use files here, which is a dictionary mapping local file paths to your desired upstream file paths.

pr_url = my_supersonic.create_pr_from_files(
    repo="user/repo",
    files={
        "local/config.json": "config/settings.json",
        "local/README.md": "docs/README.md"
    },
    title="Update configs and docs",
    labels=["configuration", "documentation"]
)

Use for:

Bulk file uploads and updates
Multi-file configuration changes
Documentation updates from local files
Any scenario where you have multiple local files to propose

Common Options

All PR creation methods accept these common options:

title: Custom PR title
description: Detailed PR description
draft: Create as draft PR (default: False)
labels: List of labels to add, e.g. ["enhancement", "bugfix"]
reviewers: List of GitHub usernames to request review from
base_branch: Target branch (default: main)
auto_merge: Enable auto-merge (default: False)
merge_strategy: How to merge ("merge", "squash", "rebase")

Pull Request Configuration

Basic Usage

# Configure PR options as keyword arguments
pr_url = my_supersonic.create_pr_from_content(
    repo="user/repo",
    content="print('hello')",
    upstream_path="src/hello.py",
    title="Add hello script",
    description="Adds a hello world script",
    base_branch="main",
    draft=False,
    labels=["enhancement"],
    reviewers=["username"]
)

Using PRConfig with `create_pr`

For more control and reusability, use the PRConfig class directly with create_pr.

from supersonic import PRConfig

config = PRConfig(
    title="Update configuration",  # Optional, defaults to "Automated changes"
    description="""
    This PR updates the configuration file with new settings.
    
    Changes:
    - Updated API endpoints
    - Added new feature flags
    """,  # Optional, supports markdown
    base_branch="main",
    draft=False,
    labels=["automated"],
    reviewers=["user1", "user2"],
    team_reviewers=["team1"],
    merge_strategy="squash",  # "merge", "squash", or "rebase"
    delete_branch_on_merge=True,
    auto_merge=False
)

my_supersonic = Supersonic("your-github-token")
pr_url = my_supersonic.create_pr(
    repo="user/repo",
    changes={"config.json": new_config_content},
    config=config
)

Enterprise Usage

supersonic = Supersonic({
    "github_token": "your-token",
    "base_url": "https://github.your-company.com/api/v3",
    "app_name": "your-tool",
    "default_pr_config": {
        "base_branch": "main",
        "draft": False,
        "labels": ["automated"],
        "merge_strategy": "squash",
        "delete_branch_on_merge": True
    }
})

Configuration

Full Configuration Options

You can optionally use a configuration dictionary when creating a Supersonic instance. Only the GitHub token is required, and there are many options.

config = {
    # Required
    "github_token": "your-token",
    
    # Optional
    "base_url": "https://api.github.com",  # For GitHub Enterprise
    "app_name": "your-app-name",
    
    # Default PR Configuration
    "default_pr_config": {
        "title": "Automated Update",  # Optional
        "description": "Changes proposed by Supersonic",  # Optional
        "base_branch": "main",
        "draft": False,
        "labels": ["automated"],
        "reviewers": [],
        "team_reviewers": [],
        "auto_merge": False,
        "merge_strategy": "squash",
        "delete_branch_on_merge": True
    }
}

my_supersonic_with_config = Supersonic(config)

Use Cases

AI-Powered Code Improvements

Perfect for AI applications that suggest code improvements. Supersonic makes it easy to turn AI suggestions into pull requests:

def handle_improvement_request(repo: str, file_path: str, user_prompt: str):
    # Your AI logic to generate improvements
    improved_code = ai.improve_code(user_prompt)
    
    # Create PR with improvements
    my_supersonic = Supersonic(config)
    pr_url = my_supersonic.create_pr_from_content(
        repo=repo,
        content=improved_code,
        upstream_path=file_path,
        title=f"AI: {user_prompt[:50]}...",
        description="""
        AI-suggested improvements based on code analysis.
        Please review the changes carefully.
        """,
        draft=True,  # Let users review AI changes
        labels=["ai-improvement"],
        reviewers=["tech-lead"]
    )
    return pr_url

Automated Documentation Updates

Keep documentation in sync with code changes:

def update_api_docs(repo: str, api_changes: Dict[str, Any]):
    # Generate updated docs
    docs = {
        "docs/api/endpoints.md": your_app.generate_endpoint_docs(api_changes),
        "docs/api/types.md": your_app.generate_type_docs(api_changes),
        "README.md": your_app.update_quickstart(api_changes)
    }
    
    # Create PR with all doc updates
    my_supersonic = Supersonic(config)
    pr_url = my_supersonic.create_pr_from_files(
        repo=repo,
        files=docs,
        title="Update API documentation",
        description="""
        # API Documentation Updates
        
        Automatically generated documentation updates based on API changes.
        """,
        labels=["documentation"],
        reviewers=["docs-team"],
        team_reviewers=["api-team"]
    )
    return pr_url

Configuration Management

Manage customer configurations through PRs:

def update_customer_config(customer_id: str, new_settings: Dict):
    repo = f"customers/{customer_id}/config"
    config_json = json.dumps(new_settings, indent=2)
    
    my_supersonic = Supersonic(config)
    pr_url = my_supersonic.create_pr_from_content(
        repo=repo,
        content=config_json,
        upstream_path="settings.json",
        title="Update customer configuration",
        description=f"""
        Configuration updates for customer {customer_id}
        
        Changes:
        {format_changes(new_settings)}
        """,
        reviewers=[f"@{customer_id}-admin"],  # Auto-assign customer admin
        labels=["config-change"],
        auto_merge=True,  # Enable auto-merge if tests pass
        merge_strategy="squash"
    )
    return pr_url

Development

Setup

# Clone repository
git clone https://github.com/cased/supersonic
cd supersonic

# Create a new virtual environment
uv venv

# Install dependencies
uv pip install -r requirements-dev.txt
uv pip install -e .

# Run tests
uv run pytest

Other implementations

Check out hypersonic for the Typescript version.

License

MIT License - see LICENSE file for details.