test(packages): enforce MCPorter policy

scripts/tests/test-shell-packages.ps1

@@ -55,6 +55,7 @@ foreach ($shell in @('powershell','bash')) {
         }
         $docFile = if ($client -eq 'codex') { 'AGENTS.md' } else { 'CLAUDE.md' }
         $docContent = Get-Content -LiteralPath (Join-Path $package $docFile) -Raw
+        if ($docContent -notmatch [regex]::Escape('Use MCP services only through the `mcporter` CLI.')) { throw "$package must require MCPorter for MCP services" }
         if (([regex]::Matches($docContent, [regex]::Escape('Apply instructions in this order'))).Count -ne 1) { throw "$client-$shell must embed the priority rule exactly once" }
         if ($client -eq 'codex' -and $docContent -match 'Always load and apply `rules/general\.md`') { throw "$package must not still instruct loading general.md by path" }
         if ($client -eq 'claude' -and (Test-Path (Join-Path $package 'rules/general.md'))) { throw 'Claude must not automatically load a second copy of general rules.' }