Summary

• add --watch to reloadable review commands like diff, show, stash show, patch, and difftool
• introduce shared watch helpers to determine whether an input can be reopened and to detect source changes
• auto-reload watched sessions in place while preserving shell state, and document/test the new workflow

Details

• reject unsupported watch inputs up front, including stdin-backed patch input and --agent-context -
• reuse shared Git arg builders so watch-mode polling tracks the exact same Git patch text the loader renders
• show watch on in the status bar when auto-refresh is active

Testing

• bun run typecheck
• bun test
• bun run test:tty-smoke