# Playbook — Syncthing Recovery (Hydrotech Beam)

## Symptoms
- Latest run not visible on other side
- Old timestamps persist remotely
- `*.sync-conflict-*` files appear in `results/`

## Recovery steps
1. Confirm both sides point to the same folder path
2. Rescan folder in Syncthing GUI
3. Pause/resume folder if stale
4. Restart Syncthing if needed
5. Archive conflicts from active results root

## Conflict archive snippet (PowerShell)
```powershell
$ts = Get-Date -Format "yyyyMMdd_HHmmss"
$archive = ".\results\archive_conflicts_$ts"
New-Item -ItemType Directory -Path $archive -Force | Out-Null
Get-ChildItem .\results -File -Filter "*.sync-conflict-*" | Move-Item -Destination $archive
```

## Clean rerun prep snippet (PowerShell)
```powershell
$ts = Get-Date -Format "yyyyMMdd_HHmmss"
$old = ".\results\archive_before_clean_rerun_$ts"
New-Item -ItemType Directory -Path $old -Force | Out-Null

$toArchive = @("doe_results.csv","doe_summary.json","doe_run.log","history.csv","history.db","optuna_study.db")
foreach ($f in $toArchive) {
  if (Test-Path ".\results\$f") { Move-Item ".\results\$f" $old }
}
```

## Verification
- Main `results/` has only current active artifacts
- Conflict files moved to archive folder
- Remote side sees same timestamps/files