Register rights affirmation check

[fallintodusk]

License and provenance

• I have authority to submit every first-party portion under the component
  license assigned by the root LICENSE.
• I identified copied material, generated code, templates, dependencies,
  datasets, and assets, including their exact upstream terms.
• I retained applicable copyright, attribution, license, and proprietary
  notices.
• I separated or excluded anything with unknown or incompatible terms.

This affirmation is not a copyright assignment or consent to future
relicensing.

Verification

• I ran the smallest relevant checks and listed any checks not run.
• I updated the owning stable documentation for changed public contracts.