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Contributing to Arcjet Examples

Thanks for helping improve the Arcjet Examples! This guide explains how to set up your environment, run examples, follow our lint/format rules, add a new example, publish it to its own repository, and keep dependencies up to date.

Table of contents

  1. Development environment
  2. Starting the examples
  3. Static analysis (formatting & linting)
  4. Adding a new example (Arcjet JS SDK)
  5. Publishing to a new repository
  6. Publishing an example (semi‑automated)
  7. Updating dependencies
  8. Helpful commands

Development environment

We recommend using the provided Dev Container. It gives you a consistent toolchain and avoids “works on my machine” issues.

Tip

You can still work locally without the devcontainer; just be sure to install the tools referenced below (e.g., Docker, Trunk).

Starting the examples

From outside the devcontainer, start all examples in watch mode:

# You'll likely need to populate the relevant .env files first
docker compose up [example-name]  # e.g. astro, deno, expressjs, etc.

When using OrbStack, each example will be reachable at:

[example-name].arcjet-examples.orb.local
# e.g. astro.arcjet-examples.orb.local

Tip

Using a different Docker provider? Ports will be auto‑assigned and examples will be served at http://localhost:<port> rather than *.arcjet-examples.orb.local. Run docker compose ps to find the assigned ports.

Static analysis (formatting & linting)

We use Trunk to manage formatting and linting.

If you’re not using the devcontainer, first install Trunk locally.

Once installed:

# Format all changed files
trunk fmt

# Lint all changed files
trunk check

Tip

If you hit Biome import‑sorting issues, stage the affected files and run:

npm run sort-staged-imports

Adding a new example (Arcjet JS SDK)

Note

These steps are for examples built with the Arcjet JS SDK.

  1. Create the project

    • Place your example in the examples/ directory.

  2. Set up the shared stylesheet

    • Copy the shared *.css files (temporarily copy from examples/astro/src/styles).

    • Install required dependencies:

      npm install @fontsource-variable/figtree @fontsource/ibm-plex-mono

    • Import styles.css using your framework’s standard method.

  3. Match the HTML structure

    • Follow the general HTML structure used by existing examples to stay consistent.

  4. Containerization

    • Add a Dockerfile and a compose.yaml in your example folder.
    • Link your example service in the root compose.yaml.

  5. (Temporary) Workspace entry

Publishing to a new repository

Once your example is merged into main, you can publish it to its own repository.

  1. Create a public GitHub repository

    • Naming: arcjet/example-[example-name]

    • Do not initialize a README, .gitignore, or license.

    • Description: An example [framework] application protected by Arcjet

    • Mark as a Template repository

    • Disable repository features you won’t need:

      • Wikis
      • Issues
      • Sponsorships
      • Discussions
      • Projects

    • Disable GitHub Actions

  2. Add the repository field to your example’s package.json

    {
  "repository": "github:arcjet/example-[example-name]"
}

Your example repository is now ready to receive code. Next, follow Publishing an example.

Publishing an example (semi‑automated)

Note

This process is currently semi‑automated. We may fully automate it with a GitHub Action & GitHub App in the future.

  1. Ensure you have main checked out and a clean working directory.

  2. Build all Docker images to validate they’re healthy (run outside the devcontainer):

    docker compose build

  3. Prepare examples for publishing:

    npm run prepare-to-publish

    This script will:

    • Shallow clone each example’s destination repo into dist/[example-name]
    • Overwrite dist/[example-name] with the current example
    • Commit any changes to the example repository
    • Prompt you to push the changes upstream

  4. When prompted, sanity‑check the changes and push.

    # Check changed files
git diff --name-only HEAD^

    Remember it's a proper (shallow) git repository! You'll only be able to see the last commit but the power of git is still there if you need it!

Updating dependencies

npm

We use npm-check-updates with a 30‑day cooldown.

  • Update Arcjet packages to the latest version:

    npx --no -- npm-check-updates --interactive --packageFile 'examples/*/package.json' --filter 'arcjet, @arcjet/*, nosecone, @nosecone/*' --target latest

  • Recursively update all dependencies to the greatest minor within cooldown:

    npx --no -- npm-check-updates --interactive --packageFile 'examples/*/package.json' --cooldown 30 --target minor

  • Recursively update all dependencies to the latest within cooldown:

    npx --no -- npm-check-updates --interactive --packageFile 'examples/*/package.json' --cooldown 30 --target @latest

Deno

Deno dependencies are currently managed manually. Open the deno-2 devcontainer and run:

cd examples/deno
deno update --interactive --latest

uv (Python)

Python dependencies are currently managed extra manually. From the python-3 devcontainer:

# Run from an example folder, e.g. examples/fastapi

# Show top-level outdated dependencies
uv tree --depth 1 --outdated | grep latest

# Show installed version of a specific package
uv tree --package <package-name>

# Update specific transitive package
uv lock --upgrade-package <package-name>

Helpful commands

Destroy all docker containers + volumes (can be relevant for dependency updates):

docker compose down -v

Rebuild all examples:

Typically if this passes without error, everything is working relatively well.

docker compose build --no-cache

VSCode switch devcontainer:

[COMMAND]+[P] > Dev Containers: Switch Container