Upload images to GitHub (gh-image)

GitHub has no public API for image uploads — the web UI uses an internal endpoint that mints user-attachments URLs scoped to the repo's visibility. gh-image (MIT, © drogers0) replicates that flow as a gh CLI extension, so you can upload from the terminal and get a ready-to-embed ![name](url) back.

This skill drives gh-image and then embeds the result into a PR/issue/comment.

Prerequisites — verify these before uploading

Run these checks; only act on the ones that fail.

1. gh CLI installed & authenticated