diff --git a/.gitea/workflows/windows-ci.yml b/.gitea/workflows/windows-ci.yml
index b1923ef..54a010c 100644
--- a/.gitea/workflows/windows-ci.yml
+++ b/.gitea/workflows/windows-ci.yml
@@ -1,99 +1,28 @@
-name: Windows CI
-
-on:
-  push:
-  pull_request:
-  workflow_dispatch:
-
-permissions:
-  contents: read
+name: Net Diag
+on: push
 
 jobs:
-  verify:
+  diag:
     runs-on: windows-latest
-    timeout-minutes: 120
-    env:
-      CI: 'true'
+    timeout-minutes: 10
     steps:
-      - uses: actions/checkout@v4
-        timeout-minutes: 10
-      - uses: actions/setup-node@v4
-        timeout-minutes: 10
-        with:
-          node-version: '24.11.1'
-          cache: npm
-      - name: Clean install
-        run: npm ci
-        timeout-minutes: 10
-      - name: Provision Electron binary
+      - name: Probe tool sources
         run: |
-          npx install-electron --no
-          if ($LASTEXITCODE -ne 0) {
-            npx install-electron --no
-            if ($LASTEXITCODE -ne 0) { exit $LASTEXITCODE }
+          whoami
+          "TEMP=$env:TEMP"
+          "HTTP_PROXY=$env:HTTP_PROXY HTTPS_PROXY=$env:HTTPS_PROXY NO_PROXY=$env:NO_PROXY"
+          try { [System.Net.Dns]::GetHostAddresses('www.gyan.dev') | ForEach-Object { "DNS gyan: $($_.IPAddressToString)" } } catch { "DNS gyan ERR: $($_.Exception.Message)" }
+          try { [System.Net.Dns]::GetHostAddresses('github.com') | ForEach-Object { "DNS github: $($_.IPAddressToString)" } } catch { "DNS github ERR: $($_.Exception.Message)" }
+          $ProgressPreference = 'SilentlyContinue'
+          try { $r = Invoke-WebRequest -Uri 'https://api.github.com/' -UseBasicParsing -TimeoutSec 20; "api.github: $($r.StatusCode)" } catch { "api.github ERR: $($_.Exception.Message)" }
+          try { $r = Invoke-WebRequest -Uri 'https://www.gyan.dev/ffmpeg/builds/packages/ffmpeg-8.1.2-essentials_build.zip' -Method Head -UseBasicParsing -TimeoutSec 30; "gyan HEAD: $($r.StatusCode) len=$($r.Headers['Content-Length'])" } catch { "gyan ERR: $($_.Exception.Message)" }
+          try { $r = Invoke-WebRequest -Uri 'https://github.com/streamlink/windows-builds/releases/download/8.4.0-1/streamlink-8.4.0-1-py314-x86_64.zip' -Method Head -UseBasicParsing -TimeoutSec 30; "github release HEAD: $($r.StatusCode) len=$($r.Headers['Content-Length'])" } catch { "github release ERR: $($_.Exception.Message)" }
+          $node = Get-Command node -ErrorAction SilentlyContinue
+          if ($node) {
+            "node: $($node.Source) $(node --version)"
+            node -e "const https=require('https');https.get('https://www.gyan.dev/ffmpeg/builds/packages/ffmpeg-8.1.2-essentials_build.zip',{timeout:20000},r=>{console.log('node gyan status',r.statusCode);r.destroy();}).on('error',e=>console.log('node gyan ERR',e.code||'',e.message)).on('timeout',function(){this.destroy();console.log('node gyan TIMEOUT')})"
+            Start-Sleep -Seconds 3
+          } else {
+            'node not on PATH'
           }
-        timeout-minutes: 10
-      - name: Lint
-        run: npm run lint
-        timeout-minutes: 10
-      - name: Lint configuration contract
-        run: npm run test:lint-config
-        timeout-minutes: 10
-      - name: Security contracts
-        run: npm run security:check
-        timeout-minutes: 10
-      - name: Security regression tests
-        run: npm run test:security
-        timeout-minutes: 10
-      - name: CI contract
-        run: npm run test:ci-contract
-        timeout-minutes: 10
-      - name: Installer contract
-        run: npm run test:installer-contract
-        timeout-minutes: 10
-      - name: Managed tools contract
-        run: npm run test:managed-tools-contract
-        timeout-minutes: 10
-      - name: Cutter matrix provisioning contract
-        run: npm run test:cutter-matrix-contract
-        timeout-minutes: 10
-      - name: Build
-        run: npm run build
-        timeout-minutes: 10
-      - name: Live integration contract
-        run: npm run test:live-integration-contract
-        timeout-minutes: 10
-      - name: Unit tests
-        run: npm run test:unit
-        timeout-minutes: 10
-      - name: Focused Electron smoke
-        run: npm run test:e2e:focused
-        timeout-minutes: 10
-      - name: Cutter media matrix
-        run: node scripts/smoke-test-cutter-media-matrix.js
-        timeout-minutes: 10
-      - name: Clean managed tools provision and repair
-        run: npm run test:managed-tools-live
-        timeout-minutes: 10
-      - name: Package directory
-        run: |
-          npm run pack
-          if ($LASTEXITCODE -ne 0) {
-            npm run pack
-            if ($LASTEXITCODE -ne 0) { exit $LASTEXITCODE }
-          }
-        timeout-minutes: 10
-      - name: Packaged launch smoke
-        run: npm run test:packaged-launch
-        timeout-minutes: 10
-      - name: Build installer
-        run: |
-          npm run dist:ci
-          if ($LASTEXITCODE -ne 0) {
-            npm run dist:ci
-            if ($LASTEXITCODE -ne 0) { exit $LASTEXITCODE }
-          }
-        timeout-minutes: 10
-      - name: Installer smoke
-        run: npm run test:installer
-        timeout-minutes: 10
+          exit 0