chore: integrate AI development platform into HLL Vietnam project

scripts/codex-runner.ps1

@@ -0,0 +1,83 @@
+param(
+    [int]$PollIntervalSeconds = 30
+)
+
+Write-Host "HLL Vietnam Codex worker started..."
+
+$lockFile = "ai/worker.lock"
+
+function Test-WorkerProcessActive {
+    param(
+        [string]$LockFilePath
+    )
+
+    if (-not (Test-Path $LockFilePath)) {
+        return $false
+    }
+
+    $lockContent = Get-Content $LockFilePath -ErrorAction SilentlyContinue | Select-Object -First 1
+    $workerPid = 0
+
+    if ([int]::TryParse(($lockContent -as [string]), [ref]$workerPid) -and $workerPid -gt 0) {
+        try {
+            Get-Process -Id $workerPid -ErrorAction Stop | Out-Null
+            return $true
+        }
+        catch {
+            return $false
+        }
+    }
+
+    return $false
+}
+
+while ($true) {
+    if (Test-Path $lockFile) {
+        if (Test-WorkerProcessActive -LockFilePath $lockFile) {
+            Write-Host "Worker already running. Waiting..."
+            Start-Sleep -Seconds $PollIntervalSeconds
+            continue
+        }
+
+        Write-Host "Stale worker lock detected. Removing it."
+        Remove-Item $lockFile -Force -ErrorAction SilentlyContinue
+    }
+
+    $pendingTasks = Get-ChildItem "ai/tasks/pending" -Filter *.md -ErrorAction SilentlyContinue
+
+    if (-not $pendingTasks) {
+        Write-Host "No pending tasks found."
+        Start-Sleep -Seconds $PollIntervalSeconds
+        continue
+    }
+
+    if (-not (Get-Command codex -ErrorAction SilentlyContinue)) {
+        Write-Host "Codex CLI not found. Install and authenticate Codex before running the worker."
+        exit 1
+    }
+
+    Set-Content -Path $lockFile -Value "$PID" -NoNewline
+
+    try {
+        $startTime = Get-Date
+        codex "Follow AGENTS.md, read the platform context in ai/, and process the pending tasks without acting outside task scope."
+        $codexExitCode = $LASTEXITCODE
+        $duration = [math]::Round(((Get-Date) - $startTime).TotalSeconds, 2)
+
+        if ($codexExitCode -eq 0) {
+            Add-Content "ai/system-metrics.md" "$(Get-Date -Format s) | worker-cycle | $duration sec | success | codex-runner"
+
+            if (Test-Path "scripts/run-integration-tests.ps1") {
+                powershell -ExecutionPolicy Bypass -File "scripts/run-integration-tests.ps1"
+            }
+        }
+        else {
+            Add-Content "ai/system-metrics.md" "$(Get-Date -Format s) | worker-cycle | $duration sec | failed($codexExitCode) | codex-runner"
+        }
+    }
+    finally {
+        Remove-Item $lockFile -Force -ErrorAction SilentlyContinue
+    }
+
+    Start-Sleep -Seconds $PollIntervalSeconds
+}