difftree

Pointer to difftree's install/setup skill, which lives in the companion difftree-action repo. Fires when someone in the difftree repo says "install difftree", "set up difftree", "add difftree to my CI", "add PR diff-tree comments", or "set up difftree-action". It does not install or configure anything itself — it routes to the canonical difftree-action-setup skill at github.com/smorinlabs/difftree-action (which installs the CLI and scaffolds the PR workflow) and points at this repo's README for a plain local `cargo install difftree`.