diff --git a/.github/workflows/daily-codex-analysis.yml b/.github/workflows/daily-codex-analysis.yml
index 433a8963..ef955a13 100644
--- a/.github/workflows/daily-codex-analysis.yml
+++ b/.github/workflows/daily-codex-analysis.yml
@@ -41,6 +41,8 @@ jobs:
       PIP_DISABLE_PIP_VERSION_CHECK: "1"
       TRADINGAGENTS_SITE_DIR: ${{ github.workspace }}\site
       TRADINGAGENTS_ARCHIVE_DIR: ${{ vars.TRADINGAGENTS_ARCHIVE_DIR }}
+      CODEX_BINARY: ${{ vars.CODEX_BINARY }}
+      CODEX_HOME: ${{ vars.CODEX_HOME }}
     steps:
       - name: Check out repository
         uses: actions/checkout@v4
@@ -60,7 +62,68 @@ jobs:
           python -m pip install -e .
           if ($LASTEXITCODE) { exit $LASTEXITCODE }
 
+      - name: Resolve Codex runtime
+        if: ${{ github.event.inputs.site_only != 'true' }}
+        run: |
+          function Test-CodexCandidate {
+            param([string]$Candidate)
+
+            if ([string]::IsNullOrWhiteSpace($Candidate) -or -not (Test-Path $Candidate)) {
+              return $false
+            }
+
+            try {
+              & $Candidate --version | Out-Null
+              return ($LASTEXITCODE -eq 0)
+            } catch {
+              Write-Warning "Codex candidate failed: $Candidate :: $($_.Exception.Message)"
+              return $false
+            }
+          }
+
+          $candidates = [System.Collections.Generic.List[string]]::new()
+
+          if (-not [string]::IsNullOrWhiteSpace($env:CODEX_BINARY)) {
+            $candidates.Add($env:CODEX_BINARY)
+          }
+
+          $candidates.Add((Join-Path $env:USERPROFILE ".codex\.sandbox-bin\codex.exe"))
+
+          Get-ChildItem -Path "C:\Users\*\.codex\.sandbox-bin\codex.exe" -ErrorAction SilentlyContinue |
+            Sort-Object LastWriteTime -Descending |
+            ForEach-Object { $candidates.Add($_.FullName) }
+
+          Get-ChildItem -Path "C:\Users\*\.vscode\extensions\openai.chatgpt-*\bin\windows-x86_64\codex.exe" -ErrorAction SilentlyContinue |
+            Sort-Object LastWriteTime -Descending |
+            ForEach-Object { $candidates.Add($_.FullName) }
+
+          $resolvedBinary = $null
+          foreach ($candidate in $candidates) {
+            if (Test-CodexCandidate $candidate) {
+              $resolvedBinary = $candidate
+              break
+            }
+          }
+
+          if (-not $resolvedBinary) {
+            throw "Could not find a usable Codex binary. Set the CODEX_BINARY repository variable or install Codex for the runner service account."
+          }
+
+          Add-Content -Path $env:GITHUB_ENV -Value "CODEX_BINARY=$resolvedBinary"
+          Write-Host "Resolved Codex binary: $resolvedBinary"
+
+          $resolvedHome = $env:CODEX_HOME
+          if ([string]::IsNullOrWhiteSpace($resolvedHome) -and $resolvedBinary -like "*.codex\.sandbox-bin\codex.exe") {
+            $resolvedHome = Split-Path (Split-Path $resolvedBinary -Parent) -Parent
+          }
+
+          if (-not [string]::IsNullOrWhiteSpace($resolvedHome)) {
+            Add-Content -Path $env:GITHUB_ENV -Value "CODEX_HOME=$resolvedHome"
+            Write-Host "Using CODEX_HOME: $resolvedHome"
+          }
+
       - name: Verify Codex login and model availability
+        if: ${{ github.event.inputs.site_only != 'true' }}
         run: |
           $workspaceDir = Join-Path $env:GITHUB_WORKSPACE ".codex-preflight"
           $script = @(