Use case

AI coding agents (Claude Code, etc.) in the CLI use gh pr create / gh pr edit to create and update pull
requests. These agents can generate screenshots, charts, and visualizations during their work, but there's no way to attach images to PR descriptions via the CLI.

Today the only workaround is manually opening the browser and drag-dropping images, which breaks the efficient workflow.

Proposal

Add an --image flag (or similar) to gh pr create and gh pr edit that uploads a local image and inserts a markdown image reference into
the PR body.

Example:
gh pr create --title "Add feature" --body "See results below" --image ./chart.png

Why this matters

CLI-driven development workflows are growing fast with AI coding agents. These tools generate artifacts (plots, architecture diagrams, test result screenshots) that are valuable context for PR reviewers but currently can't be attached without leaving the terminal.