diffpane: real-time diff viewer for monitoring Goose file changes

[Astro-Han]

Built a TUI tool that runs in a split pane next to Goose CLI. It snapshots HEAD when you start it, then watches the repo and auto-scrolls to whatever the agent just changed.

The main thing it solves: you don't have to keep running git diff to see what happened. Changes show up as they're written, scoped to the current session only.

brew install Astro-Han/tap/diffpane
# or
go install github.com/Astro-Han/diffpane@latest

https://github.com/Astro-Han/diffpane