perf(onboard): operationalize profiling traces for latency diagnosis

.github/actions/upload-nemoclaw-traces/action.yaml

@@ -0,0 +1,25 @@
+# SPDX-FileCopyrightText: Copyright (c) 2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+# SPDX-License-Identifier: Apache-2.0
+
+name: upload-nemoclaw-traces
+description: Upload NemoClaw Chrome trace JSON files generated by NEMOCLAW_TRACE_DIR.
+
+inputs:
+  name:
+    description: Artifact name
+    required: true
+  path:
+    description: Trace file or directory path
+    required: false
+    default: /tmp/nemoclaw-traces
+
+runs:
+  using: composite
+  steps:
+    - name: Upload NemoClaw profiling traces
+      uses: actions/upload-artifact@v4
+      with:
+        name: ${{ inputs.name }}
+        path: ${{ inputs.path }}
+        if-no-files-found: ignore
+        retention-days: 14

.github/workflows/e2e-branch-validation.yaml

@@ -322,6 +322,7 @@ jobs:
               'set +e
                mkdir -p /tmp/nc-debug
                cp /tmp/nemoclaw-onboard.log /tmp/nc-debug/ 2>/dev/null || true
+               cp -a /tmp/nemoclaw-traces /tmp/nc-debug/ 2>/dev/null || true
                timeout 15s openshell sandbox list  > /tmp/nc-debug/sandbox-list.txt 2>&1
                timeout 15s openshell gateway status > /tmp/nc-debug/gateway-status.txt 2>&1
                timeout 15s docker ps -a             > /tmp/nc-debug/docker-ps.txt 2>&1
@@ -331,6 +332,31 @@ jobs:
               "${INSTANCE}:/tmp/nc-debug.tar.gz" brev-debug-bundle/ 2>/dev/null || true
           ls -la brev-debug-bundle/ || true
 
+      - name: Collect Brev profiling traces
+        if: always()
+        continue-on-error: true
+        run: |
+          INSTANCE="e2e-pr-${{ inputs.pr_number || github.run_id }}"
+          mkdir -p brev-traces
+          brev refresh >/dev/null 2>&1 || true
+          ssh -o StrictHostKeyChecking=no -o LogLevel=ERROR \
+              -o ConnectTimeout=10 "${INSTANCE}" \
+              'test -d /tmp/nemoclaw-traces && tar -C /tmp -czf /tmp/nemoclaw-traces.tar.gz nemoclaw-traces || true' || true
+          scp -o StrictHostKeyChecking=no -o LogLevel=ERROR \
+              "${INSTANCE}:/tmp/nemoclaw-traces.tar.gz" brev-traces/ 2>/dev/null || true
+          if [ -f brev-traces/nemoclaw-traces.tar.gz ]; then
+            tar -C brev-traces -xzf brev-traces/nemoclaw-traces.tar.gz
+          fi
+
+      - name: Upload NemoClaw profiling traces
+        if: always()
+        uses: actions/upload-artifact@v4
+        with:
+          name: nemoclaw-traces-e2e-branch-validation
+          path: brev-traces/nemoclaw-traces
+          if-no-files-found: ignore
+          retention-days: 14
+
       - name: Upload Brev debug bundle on failure
         if: failure()
         uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1

.github/workflows/macos-e2e.yaml

@@ -91,6 +91,7 @@ jobs:
           NEMOCLAW_ACCEPT_THIRD_PARTY_SOFTWARE: "1"
           NEMOCLAW_RECREATE_SANDBOX: "1"
           NEMOCLAW_SANDBOX_NAME: "e2e-macos"
+          NEMOCLAW_TRACE_DIR: /tmp/nemoclaw-traces/macos-e2e
         run: bash test/e2e/test-full-e2e.sh
 
       - name: Explain skipped full E2E
@@ -99,6 +100,13 @@ jobs:
           echo 'Skipping macOS full E2E because Docker is unavailable on this runner.'
           echo 'The workflow still validated the NemoClaw build on macOS (Apple Silicon).'
 
+      - name: Upload NemoClaw profiling traces
+        if: always()
+        uses: ./.github/actions/upload-nemoclaw-traces
+        with:
+          name: nemoclaw-traces-macos-e2e
+          path: /tmp/nemoclaw-traces/macos-e2e
+
       - name: Upload logs on failure
         if: failure()
         uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1