diff --git a/.github/workflows/post-deployment-health-check.yml b/.github/workflows/post-deployment-health-check.yml
new file mode 100644
index 000000000000..eb05ec91d811
--- /dev/null
+++ b/.github/workflows/post-deployment-health-check.yml
@@ -0,0 +1,170 @@
+name: Post-Deployment Health Check
+
+on:
+  workflow_run:
+    workflows:
+      - "Build and deploy"
+      - "Build and deploy testing"
+    types:
+      - completed
+  workflow_dispatch:
+    inputs:
+      target_url:
+        description: 'Target URL to health check'
+        required: true
+        type: choice
+        options:
+          - https://www.pulumi.com
+          - https://www.pulumi-test.io
+        default: 'https://www.pulumi.com'
+      environment:
+        description: 'Environment name (for Slack notifications)'
+        required: true
+        type: choice
+        options:
+          - production
+          - testing
+        default: 'production'
+
+permissions:
+  contents: read
+
+env:
+  ESC_ACTION_OIDC_AUTH: true
+  ESC_ACTION_OIDC_ORGANIZATION: pulumi
+  ESC_ACTION_OIDC_REQUESTED_TOKEN_TYPE: urn:pulumi:token-type:access_token:organization
+  ESC_ACTION_ENVIRONMENT: github-secrets/pulumi-docs
+  ESC_ACTION_EXPORT_ENVIRONMENT_VARIABLES: false
+
+jobs:
+  health-check:
+    name: Run post-deployment health checks
+    runs-on: ubuntu-latest
+    if: ${{ github.event.workflow_run.conclusion == 'success' || github.event_name == 'workflow_dispatch' }}
+    outputs:
+      url: ${{ steps.target.outputs.url }}
+      environment: ${{ steps.target.outputs.environment }}
+      slack_channel: ${{ steps.target.outputs.slack_channel }}
+
+    steps:
+      - name: Determine target environment
+        id: target
+        run: |
+          if [[ "${{ github.event_name }}" == "workflow_dispatch" ]]; then
+            echo "url=${{ inputs.target_url }}" >> $GITHUB_OUTPUT
+            echo "environment=${{ inputs.environment }}" >> $GITHUB_OUTPUT
+            if [[ "${{ inputs.environment }}" == "production" ]]; then
+              echo "slack_channel=docs-ops" >> $GITHUB_OUTPUT
+            else
+              echo "slack_channel=docs-ops-test" >> $GITHUB_OUTPUT
+            fi
+          elif [[ "${{ github.event.workflow_run.name }}" == "Build and deploy" ]]; then
+            echo "url=https://www.pulumi.com" >> $GITHUB_OUTPUT
+            echo "environment=production" >> $GITHUB_OUTPUT
+            echo "slack_channel=docs-ops" >> $GITHUB_OUTPUT
+          else
+            echo "url=https://www.pulumi-test.io" >> $GITHUB_OUTPUT
+            echo "environment=testing" >> $GITHUB_OUTPUT
+            echo "slack_channel=docs-ops-test" >> $GITHUB_OUTPUT
+          fi
+
+      - name: Run health checks
+        run: |
+          #!/bin/bash
+          set -e
+
+          BASE_URL="${{ steps.target.outputs.url }}"
+          FAILED=0
+
+          echo "🏥 Post-Deployment Health Check"
+          echo "Target: $BASE_URL"
+          echo ""
+
+          # Function to check endpoint returns 200
+          check_endpoint() {
+            local path="$1"
+            local name="$2"
+            local url="${BASE_URL}${path}"
+
+            status=$(curl -s -o /dev/null -w "%{http_code}" -L "$url")
+            if [[ "$status" == "200" ]]; then
+              echo "✅ $name: $status"
+            else
+              echo "❌ $name: Expected 200, got $status"
+              FAILED=1
+            fi
+          }
+
+          # Function to check redirect
+          check_redirect() {
+            local path="$1"
+            local expected_location="$2"
+            local name="$3"
+            local url="${BASE_URL}${path}"
+
+            # Get status and location without following redirects
+            response=$(curl -s -o /dev/null -w "%{http_code}|%{redirect_url}" "$url")
+            status="${response%%|*}"
+            location="${response##*|}"
+
+            if [[ "$status" == "301" ]] && [[ "$location" =~ $expected_location ]]; then
+              echo "✅ $name: $status → $location"
+            else
+              echo "❌ $name: Expected 301 to match '$expected_location', got $status → $location"
+              FAILED=1
+            fi
+          }
+
+          echo "Testing endpoints..."
+          check_endpoint "/" "Homepage"
+          check_endpoint "/docs" "Docs landing"
+          check_endpoint "/registry" "Registry landing"
+          check_endpoint "/docs/reference/pkg/nodejs/pulumi/pulumi/" "Node.js SDK"
+          check_endpoint "/docs/reference/pkg/python/pulumi/" "Python SDK"
+          check_endpoint "/docs/reference/pkg/dotnet/Pulumi/Pulumi.html" ".NET SDK"
+          check_endpoint "/docs/reference/pkg/java/" "Java SDK"
+          check_endpoint "/docs/iac/get-started/" "Getting started"
+          check_endpoint "/docs/cli/commands/" "CLI reference"
+
+          echo ""
+          echo "Testing Lambda@Edge redirects..."
+          check_redirect "/docs/intro/cloud-providers/aws/" "/registry/packages/aws/" "Cloud provider redirect"
+          check_redirect "/docs/reference/pkg/nodejs/pulumi/aws/" "/docs/reference/pkg/aws/\\?language=nodejs" "Node.js SDK redirect"
+
+          echo ""
+          echo "=================================================="
+          if [[ $FAILED -eq 0 ]]; then
+            echo "✅ All health checks passed!"
+            exit 0
+          else
+            echo "❌ Some health checks failed!"
+            exit 1
+          fi
+
+  notify:
+    name: Send Slack notification on failure
+    runs-on: ubuntu-latest
+    needs: [health-check]
+    if: failure()
+
+    steps:
+      - name: Fetch secrets from ESC
+        id: esc-secrets
+        uses: pulumi/esc-action@v1
+
+      - name: Send Slack notification
+        uses: docker://sholung/action-slack-notify:v2.3.0
+        env:
+          SLACK_CHANNEL: ${{ needs.health-check.outputs.slack_channel || 'docs-ops' }}
+          SLACK_COLOR: "#F54242"
+          SLACK_MESSAGE: |
+            🚨 Post-deployment health check failed for ${{ needs.health-check.outputs.environment || 'production' }}
+
+            Workflow: ${{ github.event.workflow_run.html_url }}
+            Deployment: ${{ github.event.workflow_run.name }}
+            Commit: ${{ github.event.workflow_run.head_sha }}
+
+            Check the workflow logs for details: ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}
+          SLACK_USERNAME: docsbot
+          SLACK_WEBHOOK: ${{ steps.esc-secrets.outputs.SLACK_WEBHOOK_URL }}
+          SLACK_ICON: https://www.pulumi.com/logos/brand/avatar-on-white.png
diff --git a/BUILD-AND-DEPLOY.md b/BUILD-AND-DEPLOY.md
index 0b0e4a700375..499f27f98b88 100644
--- a/BUILD-AND-DEPLOY.md
+++ b/BUILD-AND-DEPLOY.md
@@ -2134,6 +2134,51 @@ Video recordings archived in GitHub Actions artifacts on failure.
 
 **Typical Duration:** 3-5 minutes
 
+### Post-Deployment Health Checks
+
+After Pulumi updates complete, automated health checks validate the deployed site using curl-based tests.
+
+**Workflow:** `.github/workflows/post-deployment-health-check.yml`
+
+**Implementation:** Inline bash script using curl (no external dependencies or repository checkout required)
+
+**What it checks:**
+
+- Core pages (homepage, docs, registry)
+- SDK documentation endpoints (Node.js, Python, .NET, Java)
+- High-traffic documentation pages
+- Lambda@Edge redirect functionality
+
+**When it runs:**
+
+- Automatically after `build-and-deploy.yml` or `testing-build-and-deploy.yml` completes successfully
+- Can be manually triggered via GitHub Actions UI
+- Can be scheduled (add `schedule` trigger to workflow)
+
+**On failure:**
+
+- Dedicated Slack notification sent to #docs-ops (production) or #docs-ops-test (testing)
+- Notification includes deployment info, commit SHA, and link to logs
+- Health check workflow marked as failed in GitHub Actions
+- Deployment workflow remains marked as successful (separation of concerns)
+
+### Local testing
+
+```bash
+# Test individual endpoint
+curl -s -o /dev/null -w "%{http_code}\n" -L https://www.pulumi.com/docs
+
+# Test redirect
+curl -s -o /dev/null -w "%{http_code}|%{redirect_url}\n" https://www.pulumi.com/docs/intro/cloud-providers/aws/
+```
+
+### Adding new checks
+
+Edit `.github/workflows/post-deployment-health-check.yml` and add calls to:
+
+- `check_endpoint` function for page availability checks (expects 200 status)
+- `check_redirect` function for Lambda@Edge redirect tests (expects 301 with location match)
+
 ### Example Program Testing
 
 **Purpose:** Validate that all code examples are functional