diff --git a/.github/workflows/agents-81-gate-followups.yml b/.github/workflows/agents-81-gate-followups.yml
index 29f48680..ef976f89 100644
--- a/.github/workflows/agents-81-gate-followups.yml
+++ b/.github/workflows/agents-81-gate-followups.yml
@@ -434,7 +434,7 @@ jobs:
           echo "$metrics_json" >> keepalive-metrics.ndjson
 
       - name: Upload keepalive metrics artifact
-        uses: actions/upload-artifact@v7
+        uses: actions/upload-artifact@v6
         with:
           name: keepalive-metrics
           path: keepalive-metrics.ndjson
@@ -630,6 +630,7 @@ jobs:
         with:
           sparse-checkout: |
             .github/scripts/prompt_injection_guard.js
+            .github/scripts/github-rate-limited-wrapper.js
             .github/scripts/github-api-with-retry.js
             .github/scripts/token_load_balancer.js
             .github/scripts/agent_registry.js
@@ -1269,7 +1270,7 @@ jobs:
           PY
 
       - name: Upload metrics artifact
-        uses: actions/upload-artifact@v7
+        uses: actions/upload-artifact@v6
         with:
           name: agents-autofix-metrics
           path: autofix-metrics.ndjson
diff --git a/.github/workflows/agents-auto-pilot.yml b/.github/workflows/agents-auto-pilot.yml
index b36f0387..ab62deac 100644
--- a/.github/workflows/agents-auto-pilot.yml
+++ b/.github/workflows/agents-auto-pilot.yml
@@ -3154,7 +3154,7 @@ jobs:
       # ── Upload auto-pilot metrics for weekly aggregation ───────────
       - name: Upload auto-pilot metrics
         if: always()
-        uses: actions/upload-artifact@v7
+        uses: actions/upload-artifact@v6
         continue-on-error: true
         with:
           name: autopilot-metrics-${{ github.run_id }}-${{ github.run_attempt }}
diff --git a/.github/workflows/agents-autofix-loop.yml b/.github/workflows/agents-autofix-loop.yml
index 3bc4d461..c1db1ac4 100644
--- a/.github/workflows/agents-autofix-loop.yml
+++ b/.github/workflows/agents-autofix-loop.yml
@@ -930,7 +930,7 @@ jobs:
           PY
 
       - name: Upload metrics artifact
-        uses: actions/upload-artifact@v7
+        uses: actions/upload-artifact@v6
         with:
           name: agents-autofix-metrics
           path: autofix-metrics.ndjson
diff --git a/.github/workflows/agents-keepalive-loop.yml b/.github/workflows/agents-keepalive-loop.yml
index 707d2673..629e598f 100644
--- a/.github/workflows/agents-keepalive-loop.yml
+++ b/.github/workflows/agents-keepalive-loop.yml
@@ -383,7 +383,7 @@ jobs:
           steps.evaluate.outputs.action == 'run' ||
           steps.evaluate.outputs.action == 'fix' ||
           steps.evaluate.outputs.action == 'conflict'
-        uses: actions/upload-artifact@v7
+        uses: actions/upload-artifact@v6
         with:
           name: keepalive-task-appendix-${{ steps.evaluate.outputs.pr_number }}
           path: /tmp/keepalive-artifacts/task-appendix.txt
@@ -952,7 +952,7 @@ jobs:
           echo "$metrics_json" >> keepalive-metrics.ndjson
 
       - name: Upload keepalive metrics artifact
-        uses: actions/upload-artifact@v7
+        uses: actions/upload-artifact@v6
         with:
           name: keepalive-metrics
           path: keepalive-metrics.ndjson
diff --git a/.github/workflows/agents-weekly-metrics.yml b/.github/workflows/agents-weekly-metrics.yml
index fd25d131..bbff26bf 100644
--- a/.github/workflows/agents-weekly-metrics.yml
+++ b/.github/workflows/agents-weekly-metrics.yml
@@ -160,7 +160,7 @@ jobs:
           python scripts/aggregate_agent_metrics.py
 
       - name: Upload weekly summary
-        uses: actions/upload-artifact@v7
+        uses: actions/upload-artifact@v6
         with:
           name: agent-weekly-metrics
           path: agent-weekly-metrics.md
diff --git a/.github/workflows/maint-coverage-guard.yml b/.github/workflows/maint-coverage-guard.yml
index 98363ced..18eb8efd 100644
--- a/.github/workflows/maint-coverage-guard.yml
+++ b/.github/workflows/maint-coverage-guard.yml
@@ -186,7 +186,7 @@ jobs:
 
       - name: Download coverage trend artifact
         if: ${{ steps.discover.outputs.run_id }}
-        uses: actions/download-artifact@v8
+        uses: actions/download-artifact@v7
         continue-on-error: true
         with:
           name: gate-coverage-trend
@@ -196,7 +196,7 @@ jobs:
 
       - name: Download coverage payload artifact
         if: ${{ steps.discover.outputs.run_id }}
-        uses: actions/download-artifact@v8
+        uses: actions/download-artifact@v7
         continue-on-error: true
         with:
           name: gate-coverage