- emit start and finish events from the concurrent sync worker pool
- show elapsed time, a progress bar, active repositories, result counts, and the latest result
- retain failures, skips, protected branches, and divergence warnings after the run
- focus the first failed repository and add f to cycle through repositories requiring attention
- add progress and summary tests, document the new controls, and set version 0.3.1
- replace the POSIX shell fixture with a compiled Go helper named hub or hub.exe
- prepend the helper directory to PATH in TestMain so tests cannot invoke an installed hub binary
- add PowerShell build, install, and Windows path examples to the README
- ignore the generated stack-sync.exe binary
- discover nested Git repositories and skip dependency and build directories
- add scan and sync commands with root, exclude, jobs, timeout, JSON, strict, and confirmation options
- block detached heads, missing remotes, active Git operations, and dirty worktrees
- exclude nested repositories from their parent's dirty-worktree check
- recheck repository safety before running hub sync
- add discovery, safety, sync, JSON, and output tests
- set the embedded version to 0.1.1 and document installation and usage