### 🚀 Cost Optimization & Backlog Efficiency

This PR implements high-impact changes to reduce GitHub Actions spend and improve issue backlog management.

#### 📉 Actions Spend Reductions
- **Mac Runner Downgrade**: Switched `test_mac` and `e2e_mac` jobs from `macos-latest-large` to standard `macos-latest`. Mac Large runners are significantly more expensive (~40x Linux) and were the primary driver of the recent 10x spend spike.
- **Mac Matrix Optimization**: Reduced the `test_mac` matrix to only Node 20.x. Testing 3 Node versions on Mac for every PR was redundant, as OS-specific issues are typically caught by the LTS version, while cross-version logic is verified on the much cheaper Linux runners.
- **Pulse Workflow Optimization**: Added a `precheck` job to the Pulse workflow to skip the expensive `npm ci` and setup steps if no reflex scripts are present.

#### 📋 Backlog Management
- **Accelerated Stale Lifecycle**: Reduced `STALE_DAYS` from 60 to 30. This ensures that inactive issues are identified and processed faster, helping to manage the current volume of 2148 open issues.
- **Increased Triage Throughput**: Increased the batch limit for scheduled issue triage from 100 to 200, allowing the bot to process a larger portion of the untriaged backlog in each run.

#### 📊 Expected Impact
- **Cost**: Significant reduction in monthly Actions spend by eliminating redundant Mac Large runner minutes.
- **Throughput**: Faster closure of stale issues and double the triage capacity per hour.

---
*This PR was generated by the Gemini CLI Bot (Brain Layer) based on time-series metric analysis.*

.github/workflows/gemini-cli-bot-pulse.yml

@@ -15,15 +15,35 @@ permissions:
   pull-requests: 'write'
 
 jobs:
-  pulse:
-    name: 'Pulse (Reflex Layer)'
+  precheck:
+    name: 'Pre-check'
     runs-on: 'ubuntu-latest'
     if: "github.repository == 'google-gemini/gemini-cli'"
+    outputs:
+      has_scripts: '${{ steps.check.outputs.has_scripts }}'
     steps:
       - name: 'Checkout'
         uses: 'actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8' # ratchet:actions/checkout@v5
         with:
-          fetch-depth: 0
+          fetch-depth: 1 # Shallow checkout for check
+      - id: 'check'
+        run: |
+          if [ -d "tools/gemini-cli-bot/reflexes/scripts" ] && [ "$(ls -A tools/gemini-cli-bot/reflexes/scripts/*.ts 2>/dev/null)" ]; then
+            echo "has_scripts=true" >> "$GITHUB_OUTPUT"
+          else
+            echo "has_scripts=false" >> "$GITHUB_OUTPUT"
+          fi
+
+  pulse:
+    name: 'Pulse (Reflex Layer)'
+    needs: 'precheck'
+    if: "needs.precheck.outputs.has_scripts == 'true'"
+    runs-on: 'ubuntu-latest'
+    steps:
+      - name: 'Checkout'
+        uses: 'actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8' # ratchet:actions/checkout@v5
+        with:
+          fetch-depth: 1 # Pulse doesn't need full history unless a script specifically asks for it.
 
       - name: 'Setup Node.js'
         uses: 'actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020' # ratchet:actions/setup-node@v4
@@ -38,11 +58,8 @@ jobs:
         env:
           GITHUB_TOKEN: '${{ secrets.GITHUB_TOKEN }}'
         run: |
-          if [ -d "tools/gemini-cli-bot/reflexes/scripts" ] && [ "$(ls -A tools/gemini-cli-bot/reflexes/scripts)" ]; then
-            for script in tools/gemini-cli-bot/reflexes/scripts/*.ts; do
-              echo "Running reflex script: $script"
-              npx tsx "$script"
-            done
-          else
-            echo "No reflex scripts found."
-          fi
+          shopt -s nullglob
+          for script in tools/gemini-cli-bot/reflexes/scripts/*.ts; do
+            echo "Running reflex script: $script"
+            npx tsx "$script"
+          done