Branch review canvas

Build a canvas that presents the requested diff reorganized for reviewer comprehension, not in file-tree order. For a prose teaching walkthrough, use pr-walkthrough instead.

Prerequisites

Read ~/.cursor/skills-cursor/canvas/SKILL.md first. Component and hook shapes: ~/.cursor/skills-cursor/canvas/sdk/index.d.ts and siblings — read, do not guess.

Comparison base

• Use @branch, @commit, or another explicit Cursor diff reference when supplied — do not re-discover range with git.
• Else use the checked-out branch against main; if absent, try master.
• If PR metadata exists, prefer the PR's base branch.
• If the base is still unclear, ask once — do not guess silently.

Gather the diff

When git is needed (no explicit diff reference):