??param([string]$Root, [switch]$AutoExport=$true)
$ErrorActionPreference='Stop'
if([string]::IsNullOrWhiteSpace($Root)){ $Root='\\DS-918\chatgpt\ChatGPT-Gouvernance-Projets' }
$reg=Join-Path $Root '_registry'
$kbJson =Join-Path $reg 'BUG_KB.json'
$kbJsonl=Join-Path (Join-Path $reg 'bug_kb') 'BUG_KB.json.txt'
$patch =Join-Path (Join-Path $reg '_patches') 'SCRIPT_PATCH_HISTORY.txt'
$rules =Join-Path $reg 'rules'
$indices=Join-Path $reg 'indices'
$snaps =Join-Path $reg 'snapshots'
$vers  =Join-Path $reg 'VERSIONS_REGISTRY.txt'
$boot  =Join-Path $reg 'bootpack'
$bootTxt=Join-Path $boot 'BOOTPACK.TXT'
if(-not ((Test-Path $kbJsonl) -or (Test-Path $kbJson))){ throw 'BOOT-PACK KB missing' }
if(-not (Test-Path $patch)){ throw 'BOOT-PACK Patch History missing' }
foreach($p in @($rules,$indices,$snaps,$vers)){ if(-not (Test-Path $p)){ throw ('Missing: '+$p) } }
$snap=Get-ChildItem $snaps -Filter 'snapshot_*.json' -File|Sort-Object LastWriteTime -Desc|Select-Object -First 1
if(-not $snap){ throw 'No snapshot_*.json' }
$times=@()
if(Test-Path $kbJsonl){ $times+=(Get-Item $kbJsonl).LastWriteTime } elseif(Test-Path $kbJson){ $times+=(Get-Item $kbJson).LastWriteTime }
$times+=(Get-Item $patch).LastWriteTime,(Get-Item $vers).LastWriteTime
$times+= (Get-ChildItem $rules -File).LastWriteTime
$times+= (Get-ChildItem $indices -File).LastWriteTime
$times+= $snap.LastWriteTime
$lastSrc=($times|Sort-Object -Desc)[0]
if((Test-Path $bootTxt) -and ((Get-Item $bootTxt).LastWriteTime -ge $lastSrc)){ return }
if($AutoExport){
  $exp=Join-Path (Join-Path $reg 'scripts') 'export_bootpack_txt_v1.1.ps1'
  if(-not (Test-Path $exp)){ throw 'export_bootpack_txt_v1.1.ps1 not found' }
  & $exp -Root $Root | Out-Null
  Set-Content -Path (Join-Path $boot '_NEED_SEND.flag') -Value (Get-Date) -Encoding UTF8
  Write-Host 'BOOTPACK.TXT re-exported. Paste it in chat to sync.'
  return
} else { throw 'BOOTPACK.TXT stale' }