magpie-good-first-issue-author

Draft a single net-new *good first issue* on the configured <upstream> repo from one supplied candidate such as a known gap or a small maintainer-named task. The skill first runs a suitability gate to confirm the candidate is small and newcomer-safe. If it passes the skill drafts one issue. The draft carries scope, code pointers, contributing-doc links, acceptance criteria, and an effort estimate. A readiness…