This implements sync branch integrity guards that detect when the remote
sync branch has been force-pushed since the last sync, preventing silent
data corruption.
Changes:
- Add internal/syncbranch/integrity.go with:
- CheckForcePush() - detects force-push via stored remote SHA comparison
- UpdateStoredRemoteSHA() - stores current remote SHA after successful sync
- ClearStoredRemoteSHA() - clears stored SHA when resetting
- GetStoredRemoteSHA() - retrieves stored SHA for inspection
- Update cmd/bd/sync.go to:
- Add --accept-rebase flag for non-interactive reset to remote
- Add force-push detection before sync branch pull operations
- Prompt user for confirmation when force-push detected
- Update stored remote SHA after successful sync
The implementation:
1. Tracks the remote sync branch commit SHA in config after each sync
2. On subsequent syncs, checks if stored SHA is ancestor of current remote
3. If not (force-push detected), warns user with details and prompts
4. User can accept reset or abort to investigate manually
5. --accept-rebase flag allows scripted/non-interactive recovery
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
