feat(aircoding): AirCoding V2 baseline — deterministic multi-agent architecture

Forked from OpenCode v1.17.4 with multi-agent system:
- 5 agents: aircoding, scheduler, worker, architect, reviewer
- Deterministic DAG scheduling engine (coordinator_tick)
- Tool whitelists as hard enforcement
- AirCoding validation plugin
- V1 requirements: C4 docs, ADR, AGENTS.md, debug-log.md
- Design documents in docs/

script/sign-windows.ps1

@@ -0,0 +1,70 @@
+param(
+  [Parameter(ValueFromRemainingArguments = $true)]
+  [string[]] $Path
+)
+
+$ErrorActionPreference = "Stop"
+
+if (-not $Path -or $Path.Count -eq 0) {
+  throw "At least one path is required"
+}
+
+if ($env:GITHUB_ACTIONS -ne "true") {
+  Write-Host "Skipping Windows signing because this is not running on GitHub Actions"
+  exit 0
+}
+
+$vars = @{
+  endpoint = $env:AZURE_TRUSTED_SIGNING_ENDPOINT
+  account = $env:AZURE_TRUSTED_SIGNING_ACCOUNT_NAME
+  profile = $env:AZURE_TRUSTED_SIGNING_CERTIFICATE_PROFILE
+}
+
+if ($vars.Values | Where-Object { -not $_ }) {
+  Write-Host "Skipping Windows signing because Azure Artifact Signing is not configured"
+  exit 0
+}
+
+$moduleVersion = "0.5.8"
+$module = Get-Module -ListAvailable -Name TrustedSigning | Where-Object { $_.Version -eq [version] $moduleVersion }
+
+if (-not $module) {
+  try {
+    Install-PackageProvider -Name NuGet -MinimumVersion 2.8.5.201 -Force -Scope CurrentUser | Out-Null
+  }
+  catch {
+    Write-Host "NuGet package provider install skipped: $($_.Exception.Message)"
+  }
+
+  Install-Module -Name TrustedSigning -RequiredVersion $moduleVersion -Force -Repository PSGallery -Scope CurrentUser
+}
+
+Import-Module TrustedSigning -RequiredVersion $moduleVersion -Force
+
+$files = @($Path | ForEach-Object { Resolve-Path $_ -ErrorAction SilentlyContinue } | Select-Object -ExpandProperty Path -Unique)
+
+if (-not $files -or $files.Count -eq 0) {
+  throw "No files matched the requested paths"
+}
+
+$params = @{
+  Endpoint                         = $vars.endpoint
+  CodeSigningAccountName           = $vars.account
+  CertificateProfileName           = $vars.profile
+  Files                            = ($files -join ",")
+  FileDigest                       = "SHA256"
+  TimestampDigest                  = "SHA256"
+  TimestampRfc3161                 = "http://timestamp.acs.microsoft.com"
+  ExcludeEnvironmentCredential     = $true
+  ExcludeWorkloadIdentityCredential = $true
+  ExcludeManagedIdentityCredential = $true
+  ExcludeSharedTokenCacheCredential = $true
+  ExcludeVisualStudioCredential    = $true
+  ExcludeVisualStudioCodeCredential = $true
+  ExcludeAzureCliCredential        = $false
+  ExcludeAzurePowerShellCredential = $true
+  ExcludeAzureDeveloperCliCredential = $true
+  ExcludeInteractiveBrowserCredential = $true
+}
+
+Invoke-TrustedSigning @params