diff --git a/.github/workflows/mu-pr-validation-pending.yml b/.github/workflows/mu-pr-validation-pending.yml
new file mode 100644
index 0000000000..d5a7c389f0
--- /dev/null
+++ b/.github/workflows/mu-pr-validation-pending.yml
@@ -0,0 +1,100 @@
+# Posts an immediate "pending" notification on a pull request
+# indicating that QEMU validation is waiting for CI to complete.
+#
+# Note: This is triggered by pull_request_target so the comment
+# appears immediately when a PR is pushed, rather than waiting
+# for CI to complete.
+#
+# Copyright (c) Microsoft Corporation.
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+##
+name: Mu QEMU PR Validation Pending
+
+on:
+  pull_request_target:
+    types:
+      - opened
+      - reopened
+      - synchronize
+    branches:
+      - release/202511
+
+permissions:
+  contents: read
+
+concurrency:
+  group: mu-qemu-pending-${{ github.event.pull_request.number }}
+  cancel-in-progress: true
+
+jobs:
+  notify-pending:
+    name: Post Pending Notification
+    runs-on: ubuntu-latest
+    steps:
+      - name: Generate GitHub App Token
+        id: app-token
+        uses: actions/create-github-app-token@v3
+        with:
+          app-id: ${{ vars.MU_ACCESS_APP_ID }}
+          private-key: ${{ secrets.MU_ACCESS_APP_PRIVATE_KEY }}
+          owner: ${{ github.repository_owner }}
+
+      - name: Update PR Comment to Pending
+        uses: actions/github-script@v8
+        with:
+          github-token: ${{ steps.app-token.outputs.token }}
+          script: |
+            const issue_number = context.issue.number;
+            const hiddenMarker = '<!-- mu-qemu-validation-result -->';
+            const marker = '*This comment was automatically generated by the Mu QEMU PR Validation workflow.*';
+
+            const comments = await github.rest.issues.listComments({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              issue_number,
+            });
+
+            const existingComment = comments.data.find((c) =>
+              c.body.includes(hiddenMarker)
+            );
+
+            const body = [
+              hiddenMarker,
+              '## :hourglass: QEMU Validation Pending',
+              '',
+              'QEMU validation is pending on successful CI completion.',
+              '',
+              '> **Note:** Any previous results are available in this comment\'s edit history.',
+              '',
+              marker,
+            ].join('\n');
+
+            if (existingComment) {
+              await github.rest.issues.updateComment({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                comment_id: existingComment.id,
+                body,
+              });
+            } else {
+              await github.rest.issues.createComment({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                issue_number,
+                body,
+              });
+            }
+
+      - name: Set Pending Commit Status
+        uses: actions/github-script@v8
+        with:
+          github-token: ${{ steps.app-token.outputs.token }}
+          script: |
+            await github.rest.repos.createCommitStatus({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              sha: '${{ github.event.pull_request.head.sha }}',
+              state: 'pending',
+              description: 'Waiting for CI to complete',
+              context: 'Mu QEMU PR Validation',
+            });
diff --git a/.github/workflows/mu-pr-validation-post.yml b/.github/workflows/mu-pr-validation-post.yml
new file mode 100644
index 0000000000..7d563b09de
--- /dev/null
+++ b/.github/workflows/mu-pr-validation-post.yml
@@ -0,0 +1,30 @@
+# Posts final results after the Mu QEMU PR Validation
+# workflow completes. Downloads metadata and updates
+# the PR comment and commit status with the final
+# outcome.
+#
+# Copyright (c) Microsoft Corporation.
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+##
+name: Mu QEMU PR Validation Post
+
+on:
+  workflow_run:
+    workflows: ["Mu QEMU PR Validation"]
+    types: ["completed"]
+
+permissions:
+  contents: read
+  actions: read
+
+jobs:
+  post-results:
+    name: Post Validation Results
+    uses: microsoft/mu_devops/.github/workflows/MuPrValidationPost.yml@add_mu_pr_val_workflow_e2e_val
+    with:
+      app-id: ${{ vars.MU_ACCESS_APP_ID }}
+      conclusion: ${{ github.event.workflow_run.conclusion }}
+      head-sha: ${{ github.event.workflow_run.head_sha }}
+      triggering-run-id: ${{ github.event.workflow_run.id }}
+    secrets:
+      private-key: ${{ secrets.MU_ACCESS_APP_PRIVATE_KEY }}
diff --git a/.github/workflows/mu-pr-validation.yml b/.github/workflows/mu-pr-validation.yml
new file mode 100644
index 0000000000..9cff89b172
--- /dev/null
+++ b/.github/workflows/mu-pr-validation.yml
@@ -0,0 +1,132 @@
+# Runs QEMU-based platform validation on pull requests.
+#
+# Triggered by the completion of the "CLANGPDB Package CI" workflow.
+#
+# Gathers PR metadata and calls the reusable MuPrValidation workflow in
+# mu_devops to build and boot mu_basecore changes on QEMU Q35 and SBSA.
+#
+# Copyright (c) Microsoft Corporation.
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+##
+name: Mu QEMU PR Validation
+
+on:
+  workflow_run:
+    workflows: ["CLANGPDB Package CI"]
+    types: ["completed"]
+
+concurrency:
+  group: mu-qemu-pr-${{ github.event.workflow_run.head_branch }}
+  cancel-in-progress: true
+
+permissions:
+  actions: read
+  contents: read
+  pull-requests: read
+
+jobs:
+  prepare:
+    runs-on: ubuntu-latest
+    name: Gather PR Metadata
+    if: |
+      github.event.workflow_run.conclusion == 'success' &&
+      github.event.workflow_run.event == 'pull_request'
+    outputs:
+      pr_number: ${{ steps.pr-info.outputs.pr_number }}
+      skip: ${{ steps.pr-info.outputs.skip }}
+      skip_reason: ${{ steps.pr-info.outputs.skip_reason }}
+    steps:
+      - name: Get PR Information
+        id: pr-info
+        shell: bash
+        env:
+          GH_TOKEN: ${{ github.token }}
+          HEAD_SHA: ${{ github.event.workflow_run.head_sha }}
+          HEAD_REF: ${{ github.event.workflow_run.head_branch }}
+          HEAD_REPO: ${{ github.event.workflow_run.head_repository.full_name }}
+        run: |
+          owner="${HEAD_REPO%%/*}"
+          pr_number=$(gh api "repos/${GITHUB_REPOSITORY}/pulls" \
+            --method GET -f state=open -f head="${owner}:${HEAD_REF}" \
+            --jq '.[0].number')
+
+          if [[ -z "$pr_number" || "$pr_number" == "null" ]]; then
+            echo "::notice::No open PR found for head $owner:$HEAD_REF."
+            echo "skip=true" >> "$GITHUB_OUTPUT"
+
+            closed_pr_json=$(gh api "repos/${GITHUB_REPOSITORY}/pulls" \
+              --method GET -f state=closed -f head="${owner}:${HEAD_REF}" \
+              -f sort=updated -f direction=desc -f per_page=1 \
+              --jq '.[0] | select(. != null) | {number, merged: (.merged_at != null)}')
+
+            if [[ -n "$closed_pr_json" ]]; then
+              closed_pr_number=$(echo "$closed_pr_json" | jq -r '.number')
+              closed_pr_merged=$(echo "$closed_pr_json" | jq -r '.merged')
+
+              echo "pr_number=$closed_pr_number" >> "$GITHUB_OUTPUT"
+
+              if [[ "$closed_pr_merged" == "true" ]]; then
+                echo "::notice::PR #$closed_pr_number was merged before validation started."
+                echo "skip_reason=merged" >> "$GITHUB_OUTPUT"
+              else
+                echo "::notice::PR #$closed_pr_number was closed before validation started."
+                echo "skip_reason=closed" >> "$GITHUB_OUTPUT"
+              fi
+            else
+              echo "::notice::No PR (open or closed) found for head $owner:$HEAD_REF."
+              echo "skip_reason=branch_unavailable" >> "$GITHUB_OUTPUT"
+            fi
+
+            exit 0
+          fi
+
+          echo "skip=false" >> "$GITHUB_OUTPUT"
+
+          echo "::group::PR Information"
+          echo "  - PR Number: $pr_number"
+          echo "  - Head SHA:  $HEAD_SHA"
+          echo "  - Head Ref:  $HEAD_REF"
+          echo "  - Source:    $HEAD_REPO"
+          echo "::endgroup::"
+
+          echo "pr_number=$pr_number" >> "$GITHUB_OUTPUT"
+
+  upload-skip-metadata:
+    name: Upload Skip Metadata
+    runs-on: ubuntu-latest
+    needs: [prepare]
+    if: needs.prepare.outputs.skip == 'true' && needs.prepare.outputs.pr_number != ''
+    steps:
+      - name: Create Skip Metadata
+        shell: bash
+        run: |
+          mkdir -p metadata
+          cat > metadata/pr-metadata.json <<EOF
+          {
+            "pr_number": ${{ needs.prepare.outputs.pr_number }},
+            "skipped": true,
+            "skip_reason": "${{ needs.prepare.outputs.skip_reason }}"
+          }
+          EOF
+
+      - name: Upload PR Metadata
+        uses: actions/upload-artifact@v7
+        with:
+          name: mu-qemu-pr-metadata
+          path: metadata/pr-metadata.json
+
+  qemu-pr-validation:
+    name: Run Mu QEMU Validation
+    needs: [prepare]
+    if: needs.prepare.result == 'success' && needs.prepare.outputs.skip != 'true'
+    uses: microsoft/mu_devops/.github/workflows/MuPrValidation.yml@add_mu_pr_val_workflow_e2e_val
+    with:
+      app-id: ${{ vars.MU_ACCESS_APP_ID }}
+      caller-ref: ${{ github.event.workflow_run.head_sha }}
+      caller-repo: ${{ github.repository }}
+      caller-repo-name: mu_basecore
+      head-sha: ${{ github.event.workflow_run.head_sha }}
+      pr-number: ${{ fromJSON(needs.prepare.outputs.pr_number) }}
+      submodule-path: MU_BASECORE
+    secrets:
+      private-key: ${{ secrets.MU_ACCESS_APP_PRIVATE_KEY }}