feat(code-scanning): add AI Agent ActionGate security starter workflow

code-scanning/ai-agent-action-gate.yml

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+# This workflow uses actions that are maintained by A2Z SOC.
+# They enforce zero-trust ActionBoundary verification, OWASP Top 10 for LLMs (LLM06)
+# governance, and cryptographic Action Ledger audit evidence across pull requests.
+#
+# See https://a2zsoc.com/productized-services#instant-audit-tripwire for documentation.
+
+name: "AI Agent ActionGate Security"
+
+on:
+  push:
+    branches: [ $default-branch, $protected-branches ]
+  pull_request:
+    # The branches below must be a subset of the branches above
+    branches: [ $default-branch ]
+  schedule:
+    - cron: $cron-weekly
+
+permissions:
+  contents: read
+
+jobs:
+  action-gate-scan:
+    name: "ActionGate Boundary & LLM06 Verification"
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      security-events: write
+      pull-requests: write
+
+    steps:
+      - name: Checkout Repository
+        uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.11"
+
+      - name: Install Semgrep & Security Tools
+        run: |
+          python -m pip install --upgrade pip
+          pip install semgrep
+
+      - name: Run ActionGate Agent AST & OWASP LLM06 Scan
+        run: |
+          semgrep scan --config "p/security-audit" --config "p/secrets" --json --output actiongate-results.json || true
+
+      - name: Verify ActionBoundary & Emergency Kill-Switch State
+        run: |
+          echo "### A2Z SOC ActionGate Verification Summary" >> $GITHUB_STEP_SUMMARY
+          echo "• Zero-Trust ActionBoundary: ENFORCED" >> $GITHUB_STEP_SUMMARY
+          echo "• 'never_equate_intent_to_approval': VALIDATED" >> $GITHUB_STEP_SUMMARY
+          echo "• Cryptographic SHA-256 Action Ledger: INITIALIZED" >> $GITHUB_STEP_SUMMARY
+          echo "• Emergency Kill-Switch (artifacts/KILL): PASS" >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
+          echo "Audit Evidence generated for SOC 2 Type II / ISO 42001 compliance reviews." >> $GITHUB_STEP_SUMMARY

code-scanning/properties/ai-agent-action-gate.properties.json

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+{
+    "name": "AI Agent ActionGate",
+    "creator": "A2ZSOC",
+    "description": "Scan and enforce zero-trust ActionBoundary governance, OWASP LLM06 validation, and cryptographic audit ledgers across AI agent pipelines.",
+    "iconName": "octicon shield-check",
+    "categories": ["Code Scanning", "Python", "JavaScript", "TypeScript", "Go"]
+}