Steve Yegge def4cf4efa Add sync branch integrity guards for force-push detection (bd-hlsw.4) ...

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>

2025-12-30 17:07:25 -08:00

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