diff --git a/.github/workflows/compiler_warnings.yaml b/.github/workflows/compiler_warnings.yaml
new file mode 100644
index 00000000..185f025c
--- /dev/null
+++ b/.github/workflows/compiler_warnings.yaml
@@ -0,0 +1,222 @@
+name: Report Compiler Warnings
+
+on:
+  pull_request: {}
+
+permissions:
+  pull-requests: write
+  contents: read
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number }}
+  cancel-in-progress: true
+
+jobs:
+  warnings:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          # Clone the repo to a subdirectory, so we can initialize the Zephyr
+          # workspace in the parent directory.
+          path: zephyr-workspace/open-earable-v2
+
+      - name: Cache/Install APT Packages
+        uses: awalsh128/cache-apt-pkgs-action@latest
+        with:
+          packages: ccache git cmake ninja-build gperf ccache dfu-util device-tree-compiler wget python3-dev python3-pip python3-setuptools python3-tk python3-wheel xz-utils file make gcc gcc-multilib g++-multilib libsdl2-dev libmagic1
+          version: 1.0
+          execute_install_scripts: true
+
+      - name: Cache PIP Packages
+        uses: actions/cache@v4
+        with:
+          path: ~/.cache/pip
+          key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}
+          restore-keys: |
+            ${{ runner.os }}-pip-
+
+      - name: Install West
+        run: pip3 install west
+
+      - name: Install Zephyr SDK
+        run: |
+          wget -q https://github.com/zephyrproject-rtos/sdk-ng/releases/download/v0.17.0/zephyr-sdk-0.17.0_linux-x86_64_minimal.tar.xz
+          tar xf zephyr-sdk-0.17.0_linux-x86_64_minimal.tar.xz -C ~/
+          ~/zephyr-sdk-0.17.0/setup.sh -c -t arm-zephyr-eabi
+
+      - name: Initialize Zephyr Workspace
+        run: |
+          cd zephyr-workspace
+          west init -l open-earable-v2
+          west update --narrow -o=--depth=1
+          pip3 install -r zephyr/scripts/requirements.txt
+
+      - name: Register Custom Boards
+        run: |
+          mkdir -p $(pwd)/workflow-board-temp
+          cp -R $(pwd)/zephyr-workspace/open-earable-v2/boards $(pwd)/workflow-board-temp/boards
+
+          mkdir -p $(pwd)/workflow-board-temp/boards/arm
+          cp -R -f $(pwd)/workflow-board-temp/boards/teco/* $(pwd)/workflow-board-temp/boards/arm/ || true
+          rm -f -R $(pwd)/workflow-board-temp/boards/teco
+
+          cp -R -f $(pwd)/workflow-board-temp/boards/* $(pwd)/zephyr-workspace/zephyr/boards
+
+      - name: Cache ~/.cache/ccache
+        uses: actions/cache@v4
+        with:
+          path: ~/.cache/ccache
+          key: ccache-warnings-v1-${{ runner.os }}-${{ hashFiles('zephyr-workspace/open-earable-v2/west.yml') }}
+          restore-keys: |
+            ccache-warnings-v1-${{ runner.os }}-
+
+      - name: Build with Extended Compiler Warnings
+        continue-on-error: true
+        timeout-minutes: 15
+        id: warning-build
+        env:
+          EXTRA_CFLAGS: -Wextra -Wshadow
+          EXTRA_CXXFLAGS: -Wextra -Wshadow
+        run: |
+          set -o pipefail
+          cd zephyr-workspace
+          west build \
+            --build-dir build-warnings \
+            --board openearable_v2/nrf5340/cpuapp \
+            --pristine=always open-earable-v2 \
+            -- -DFILE_SUFFIX="fota" \
+            2>&1 | tee warning-build.log
+
+      - name: Collect Compiler Warnings
+        if: always()
+        continue-on-error: true
+        id: compiler-warnings
+        run: |
+          mkdir -p workflow-board-temp
+          warning_report="workflow-board-temp/compiler-warnings.txt"
+          project_warning_report="workflow-board-temp/project-compiler-warnings.txt"
+          configuration_warning_report="workflow-board-temp/configuration-warnings.txt"
+
+          if [ -f zephyr-workspace/warning-build.log ]; then
+            sed -E 's/\x1B\[[0-9;]*[mK]//g' zephyr-workspace/warning-build.log \
+              | grep -Ei '(^|[[:space:]])warning:' \
+              > "$warning_report" || true
+          else
+            touch "$warning_report"
+          fi
+
+          grep '/zephyr-workspace/open-earable-v2/' "$warning_report" \
+            | sed -E 's#^.*/zephyr-workspace/open-earable-v2/##' \
+            | awk '!seen[$0]++' \
+            > "$project_warning_report" || true
+
+          grep -Ei '^[[:space:]]*(---[[:space:]]*)?warning:' "$warning_report" \
+            | awk '!seen[$0]++' \
+            > "$configuration_warning_report" || true
+
+          warning_count=$(wc -l < "$warning_report" | tr -d ' ')
+          project_warning_count=$(wc -l < "$project_warning_report" | tr -d ' ')
+          configuration_warning_count=$(wc -l < "$configuration_warning_report" | tr -d ' ')
+
+          echo "count=$warning_count" >> "$GITHUB_OUTPUT"
+          echo "project_count=$project_warning_count" >> "$GITHUB_OUTPUT"
+          echo "configuration_count=$configuration_warning_count" >> "$GITHUB_OUTPUT"
+          echo "Collected $warning_count warning(s): $project_warning_count unique project and $configuration_warning_count unique configuration warning(s)."
+
+      - name: Upload Complete Compiler Warning Report
+        if: always()
+        continue-on-error: true
+        uses: actions/upload-artifact@v4
+        id: warning-artifact-upload
+        with:
+          name: compiler-warnings
+          path: workflow-board-temp/compiler-warnings.txt
+
+      - name: Prepare PR Comment
+        if: always()
+        continue-on-error: true
+        env:
+          WARNING_BUILD_OUTCOME: ${{ steps.warning-build.outcome }}
+          TOTAL_WARNING_COUNT: ${{ steps.compiler-warnings.outputs.count }}
+          PROJECT_WARNING_COUNT: ${{ steps.compiler-warnings.outputs.project_count }}
+          CONFIGURATION_WARNING_COUNT: ${{ steps.compiler-warnings.outputs.configuration_count }}
+          WARNING_REPORT_URL: ${{ steps.warning-artifact-upload.outputs.artifact-url }}
+        run: |
+          comment="workflow-board-temp/compiler-warnings-comment.md"
+          project_warning_report="workflow-board-temp/project-compiler-warnings.txt"
+          configuration_warning_report="workflow-board-temp/configuration-warnings.txt"
+          touch "$project_warning_report" "$configuration_warning_report"
+
+          {
+            echo "## Compiler warnings"
+            echo
+
+            if [ "$WARNING_BUILD_OUTCOME" = "success" ]; then
+              echo "The extended-warning build completed successfully."
+            elif [ "$WARNING_BUILD_OUTCOME" = "failure" ]; then
+              echo "The extended-warning build failed; this report may be incomplete."
+            else
+              echo "The extended-warning build did not run."
+            fi
+
+            echo
+            if [ "$WARNING_BUILD_OUTCOME" = "skipped" ]; then
+              echo "### Project compiler warnings: unavailable"
+            elif [ "${PROJECT_WARNING_COUNT:-0}" -eq 0 ]; then
+              echo "### Project compiler warnings: none"
+            else
+              echo "### Project compiler warnings: $PROJECT_WARNING_COUNT"
+              echo
+              echo "<details open>"
+              echo "<summary>Show project warnings</summary>"
+              echo
+              echo '```text'
+              head -n 100 "$project_warning_report"
+              echo '```'
+              echo
+              if [ "$PROJECT_WARNING_COUNT" -gt 100 ]; then
+                echo "Showing the first 100 unique project warnings."
+                echo
+              fi
+              echo "</details>"
+            fi
+
+            if [ "$WARNING_BUILD_OUTCOME" != "skipped" ]; then
+              echo
+              if [ "${CONFIGURATION_WARNING_COUNT:-0}" -eq 0 ]; then
+                echo "### Configuration and security warnings: none"
+              else
+                echo "### Configuration and security warnings: $CONFIGURATION_WARNING_COUNT"
+                echo
+                echo "<details>"
+                echo "<summary>Show configuration warnings</summary>"
+                echo
+                echo '```text'
+                head -n 50 "$configuration_warning_report"
+                echo '```'
+                echo
+                echo "</details>"
+              fi
+
+              echo
+              if [ -n "$WARNING_REPORT_URL" ]; then
+                echo "The [complete warning report]($WARNING_REPORT_URL) contains all ${TOTAL_WARNING_COUNT:-0} warning lines, including warnings from Zephyr and other dependencies."
+              else
+                echo "The complete warning report artifact could not be uploaded."
+              fi
+            fi
+
+            echo
+            echo "[View the warning workflow run](${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }})"
+          } > "$comment"
+
+          cat "$comment" >> "$GITHUB_STEP_SUMMARY"
+
+      - name: Comment Compiler Warnings on PR
+        if: always()
+        continue-on-error: true
+        uses: thollander/actions-comment-pull-request@v3
+        with:
+          file-path: workflow-board-temp/compiler-warnings-comment.md
+          comment-tag: compiler-warnings