Checks are best shared using packages.
We recommend prefixing packages intended for open source or community use with commonality-checks. This will allow for a shorter path when configuring them in your project configuration.

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Static checks

Checks that don’t require any configuration can be added to your project by adding the them to directly to your project configuration file.
sorted-dependencies.js
export default {
  name: 'sorted-dependencies',
  message: 'Dependencies must be sorted',
  validate: () => {
    // ...validation logic
  }
}
We recommend exporting static checks as separate entry points in your package.json.
package.json
{
  "name": "commonality-checks-myname",
  "exports": {
    "./has-code": "./has-code.js"
  }
}
Checks can then be configured using the full package name or shorthand if prefixed with commonality-checks.
.commonality/config.json
{
  "checks": {
    "*": [
      "commonality-checks-myname/sorted-dependencies",
      "myname/sorted-dependencies"
    ]
  }
}

​
Composed checks

Checks that are designed to be configured by the user can be exported as functions.
has-script.js
export const hasScript = (name, value) => ({
  name: 'has-script',
  message: `package.json must have script "${name}" with value "${value}"`,
  validate: () => {
    // ...validation logic
  }
});
These checks can be exported from as named exports from a single file.
index.js
export * from './has-script.js'
Composed checks can then be exported from package’s main entry point.
package.json
{
  "name": "commonality-checks-myname",
  "main": "index.js",
  "exports": {
    ".": "./index.js"
  }
}
Developers can then configure these checks and export them as static checks locally in their projects or as packages to standardize a toolchain across an organization.
.commonality/has-build-script.ts
import { hasScript }

export default {
  name: 'has-build-script',
  message: 'Package must have standard build script',
  validate
}