arcade-mcp/CONTRIBUTING.md
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<!-- CURSOR_SUMMARY -->
> [!NOTE]
> **Medium Risk**
> Touches authentication/login flow, credentials-file permissions, and
subprocess lifecycle behavior across platforms; while mostly defensive,
regressions could impact login or process management on Windows/macOS
runners.
> 
> **Overview**
> Improves Windows/cross-platform reliability across the CLI and MCP
server: OAuth login now binds the callback server to `127.0.0.1`, avoids
slow loopback reverse-DNS, adds a configurable callback timeout
(`--timeout` + env default), and opens URLs via a Windows-friendly
`_open_browser` to avoid flashing console windows.
> 
> Centralizes CLI output via a shared `console` that forces UTF-8 on
Windows, standardizes UTF-8 file reads/writes throughout, tightens
credentials-file permissions on Windows using `icacls`, and adds shared
Windows subprocess helpers for **no-window** process creation and
graceful termination (used by `deploy`, MCP reload, and usage-tracking
worker).
> 
> Updates client configuration UX/robustness (Windows AppData resolution
via `platformdirs`, Cursor config path fallbacks + compatibility writes,
overwrite warnings, absolute `uv` path for GUI clients, safer path
display) and improves `deploy` child-process handling to avoid
pipe-buffer deadlocks while giving better debug-aware error messages.
> 
> Expands CI to run tests on Linux/Windows/macOS, adds a no-auth CLI
integration workflow, disables usage tracking in toolkits CI, and adds
extensive regression tests for Windows signals, subprocess cleanup,
UTF-8, and config-path edge cases; bumps `arcade-core` to `4.4.2` and
`arcade-mcp-server` to `1.17.2` (with updated dependency pin).
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# Contributing to `arcade-mcp`
Contributions are welcome, and they are greatly appreciated!
Every little bit helps, and credit will always be given.
You can contribute in many ways:
# Types of Contributions
## Report Bugs
Report bugs at https://github.com/ArcadeAI/arcade-mcp/issues
If you are reporting a bug, please include:
- Your operating system name and version.
- Any details about your local setup that might be helpful in troubleshooting.
- Detailed steps to reproduce the bug.
## Fix Bugs
Look through the GitHub issues for bugs.
Anything tagged with "bug" and "help wanted" is open to whoever wants to implement a fix for it.
## Implement Features
Look through the GitHub issues for features.
Anything tagged with "enhancement" and "help wanted" is open to whoever wants to implement it.
## Write Documentation
Arcade could always use more documentation, whether as part of the official docs, in docstrings, or even on the web in blog posts, articles, and such.
## Submit Feedback
The best way to send feedback is to file an issue at https://github.com/ArcadeAI/arcade-mcp/issues.
If you are proposing a new feature:
- Explain in detail how it would work.
- Keep the scope as narrow as possible, to make it easier to implement.
- Remember that this is a volunteer-driven project, and that contributions
are welcome :)
# Get Started!
Ready to contribute? Here's how to set up `arcade-mcp` for local development.
Please note this documentation assumes you already have `uv` and `Git` installed and ready to go.
1. Fork the `arcade-mcp` repo on GitHub.
2. Clone your fork locally:
```bash
cd <directory_in_which_repo_should_be_created>
git clone git@github.com:YOUR_GITHUB_USERNAME/arcade-mcp.git
```
3. Now we need to install the environment. Navigate into the directory
```bash
cd arcade-mcp
```
Create your virtual environment
```bash
uv venv --python 3.11.6
```
4. Install the development environment and dependencies:
```bash
# Install all packages and development dependencies via uv workspace
uv sync --extra all --extra dev
# Install pre-commit hooks for code quality
uv run pre-commit install
```
Or use the convenient Makefile command that does both:
```bash
make install
```
The uv workspace will automatically handle installing all lib packages in the correct dependency order.
5. Create a branch for local development:
```bash
git checkout -b name-of-your-bugfix-or-feature
```
Now you can make your changes locally.
6. Don't forget to add test cases for your added functionality to the `libs/tests` directory.
7. When you're done making changes, check that your changes pass the formatting tests.
```bash
make check
```
Now, validate that all unit tests are passing:
```bash
make test
```
8. You can also run tests for specific components:
```bash
# Test all lib packages
make test
```
9. The CI/CD pipeline will run additional checks across different Python versions, so local testing with a single version is usually sufficient.
10. Commit your changes and push your branch to GitHub:
```bash
git add .
git commit -m "Your detailed description of your changes."
git push origin name-of-your-bugfix-or-feature
```
11. Submit a pull request through the GitHub website.
# Pull Request Guidelines
Before you submit a pull request, check that it meets these guidelines:
1. The pull request should include tests.
2. If the pull request adds functionality, the [docs](https://github.com/ArcadeAI/docs) should be updated.
3. If making contributions to multiple servers (i.e. Google and Slack, etc.), submit a separate pull request for each.
This helps us segregate the changes during the review process making it more efficient.