form Agent Skills & AI Rules

# Agent Instructions

Before analyzing or changing this repository, read and follow
[`CONTRIBUTING.md`](./CONTRIBUTING.md). Its contribution, development, testing,
pull request, and changeset requirements apply to AI-assisted work as well as
human-authored work.

Keep every change focused on one topic. Understand and verify all generated
code, run the required checks, and provide a concise pull request description
that follows the repository template.