diff --git a/.github/dependabot.yml b/.github/dependabot.yml
index 2df162d89..8221219aa 100644
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@@ -38,4 +38,4 @@ updates:
     open-pull-requests-limit: 10
     labels:
       - "dependencies"
-      - "github-actions"
+      - "area: ci-cd"
diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index 27c5b540f..54616541d 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -32,8 +32,8 @@ jobs:
           - python
     steps:
       - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
-      - uses: github/codeql-action/init@99df26d4f13ea111d4ec1a7dddef6063f76b97e9 # v4.37.0
+      - uses: github/codeql-action/init@db488ddef3bf6cb639b32c2e9a7c0a7ea8271d28 # v4.37.8
         with:
           languages: ${{ matrix.language }}
-      - uses: github/codeql-action/autobuild@99df26d4f13ea111d4ec1a7dddef6063f76b97e9 # v4.37.0
-      - uses: github/codeql-action/analyze@99df26d4f13ea111d4ec1a7dddef6063f76b97e9 # v4.37.0
+      - uses: github/codeql-action/autobuild@db488ddef3bf6cb639b32c2e9a7c0a7ea8271d28 # v4.37.8
+      - uses: github/codeql-action/analyze@db488ddef3bf6cb639b32c2e9a7c0a7ea8271d28 # v4.37.8
diff --git a/.github/workflows/ossf-scorecard.yml b/.github/workflows/ossf-scorecard.yml
index 2a4b6eaa9..dd7c2270c 100644
--- a/.github/workflows/ossf-scorecard.yml
+++ b/.github/workflows/ossf-scorecard.yml
@@ -8,6 +8,10 @@ on:
     branches:
       - develop
       - main
+  pull_request:
+    branches:
+      - develop
+      - main
 
 permissions: read-all
 
@@ -27,13 +31,13 @@ jobs:
         with:
           persist-credentials: false
       - uses: ossf/scorecard-action@4eaacf0543bb3f2c246792bd56e8cdeffafb205a # v2.4.3
-        if: github.ref == format('refs/heads/{0}', github.event.repository.default_branch)
+        if: github.event_name == 'pull_request' || github.ref == format('refs/heads/{0}', github.event.repository.default_branch)
         with:
           results_file: results.sarif
           results_format: sarif
           publish_results: ${{ github.ref == format('refs/heads/{0}', github.event.repository.default_branch) }}
       - uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
-        if: github.ref == format('refs/heads/{0}', github.event.repository.default_branch)
+        if: github.event_name == 'pull_request' || github.ref == format('refs/heads/{0}', github.event.repository.default_branch)
         with:
           name: ossf-scorecard-results
           path: results.sarif
@@ -41,7 +45,7 @@ jobs:
   scorecard-sarif-upload:
     name: scorecard-sarif-upload
     needs: analysis
-    if: github.ref == format('refs/heads/{0}', github.event.repository.default_branch)
+    if: github.event_name == 'pull_request' || github.ref == format('refs/heads/{0}', github.event.repository.default_branch)
     runs-on: ubuntu-latest
     permissions:
       actions: read
@@ -63,7 +67,7 @@ jobs:
         with:
           persist-credentials: false
           path: trusted-scorecard-scripts
-          ref: ${{ github.ref_name }}
+          ref: ${{ github.event_name == 'pull_request' && github.event.pull_request.base.sha || github.ref_name }}
       - uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8.0.1
         with:
           name: ossf-scorecard-results
@@ -79,6 +83,6 @@ jobs:
           python3 trusted-scorecard-scripts/scripts/checks/normalize_scorecard_sarif.py
           scorecard-sarif/results.sarif
           normalized-scorecard-results.sarif
-      - uses: github/codeql-action/upload-sarif@99df26d4f13ea111d4ec1a7dddef6063f76b97e9 # v4.37.0 peeled commit; SHA pinning retained as supply-chain attack mitigation.
+      - uses: github/codeql-action/upload-sarif@db488ddef3bf6cb639b32c2e9a7c0a7ea8271d28 # v4.37.8 peeled commit; SHA pinning retained as supply-chain attack mitigation.
         with:
           sarif_file: normalized-scorecard-results.sarif
diff --git a/.github/workflows/trivy.yml b/.github/workflows/trivy.yml
index d79ec32e1..db6c3db87 100644
--- a/.github/workflows/trivy.yml
+++ b/.github/workflows/trivy.yml
@@ -48,7 +48,7 @@ jobs:
           skip-dirs: 'services/analysis-engine/.venv'
           trivyignores: ./.trivyignore
       - name: Upload Trivy scan results to GitHub Security tab
-        uses: github/codeql-action/upload-sarif@99df26d4f13ea111d4ec1a7dddef6063f76b97e9 # v4.37.0 peeled commit; SHA pinning retained as supply-chain attack mitigation.
+        uses: github/codeql-action/upload-sarif@db488ddef3bf6cb639b32c2e9a7c0a7ea8271d28 # v4.37.8 peeled commit; SHA pinning retained as supply-chain attack mitigation.
         if: always()
         with:
           sarif_file: trivy-results.sarif
diff --git a/services/analysis-engine/tests/test_codeql_action_version_contract.py b/services/analysis-engine/tests/test_codeql_action_version_contract.py
new file mode 100644
index 000000000..6e225686d
--- /dev/null
+++ b/services/analysis-engine/tests/test_codeql_action_version_contract.py
@@ -0,0 +1,22 @@
+"""Regression contract for coordinated CodeQL Action component upgrades."""
+
+from __future__ import annotations
+
+import re
+from pathlib import Path
+
+REPO_ROOT = Path(__file__).resolve().parents[3]
+CODEQL_WORKFLOW = REPO_ROOT / ".github" / "workflows" / "codeql.yml"
+CODEQL_ACTION_PATTERN = re.compile(
+    r"github/codeql-action/(?:init|autobuild|analyze)@([0-9a-f]{40})\s+#\s+(v[0-9.]+)"
+)
+
+
+def test_codeql_job_uses_one_action_release() -> None:
+    """Require init, autobuild, and analyze to use one reviewed CodeQL release."""
+    workflow = CODEQL_WORKFLOW.read_text(encoding="utf-8")
+    action_refs = CODEQL_ACTION_PATTERN.findall(workflow)
+
+    assert len(action_refs) == 3
+    assert len({sha for sha, _version in action_refs}) == 1
+    assert len({version for _sha, version in action_refs}) == 1
diff --git a/services/analysis-engine/tests/test_codeql_upload_sarif_version_contract.py b/services/analysis-engine/tests/test_codeql_upload_sarif_version_contract.py
new file mode 100644
index 000000000..523c548b1
--- /dev/null
+++ b/services/analysis-engine/tests/test_codeql_upload_sarif_version_contract.py
@@ -0,0 +1,23 @@
+"""Regression contracts for CodeQL SARIF uploader provenance comments."""
+
+from __future__ import annotations
+
+from pathlib import Path
+
+REPO_ROOT = Path(__file__).resolve().parents[3]
+EXPECTED_SHA = "db488ddef3bf6cb639b32c2e9a7c0a7ea8271d28"
+EXPECTED_VERSION = "v4.37.8"
+UPLOAD_SARIF_REF = (
+    f"github/codeql-action/upload-sarif@{EXPECTED_SHA} # {EXPECTED_VERSION} peeled commit;"
+)
+WORKFLOWS = (
+    REPO_ROOT / ".github" / "workflows" / "ossf-scorecard.yml",
+    REPO_ROOT / ".github" / "workflows" / "trivy.yml",
+)
+
+
+def test_upload_sarif_sha_and_version_comment_move_together() -> None:
+    """Keep each immutable SARIF uploader pin paired with its reviewed release label."""
+    for workflow in WORKFLOWS:
+        contents = workflow.read_text(encoding="utf-8")
+        assert contents.count(UPLOAD_SARIF_REF) == 1
diff --git a/services/analysis-engine/tests/test_dependabot_label_contract.py b/services/analysis-engine/tests/test_dependabot_label_contract.py
new file mode 100644
index 000000000..4fad611ee
--- /dev/null
+++ b/services/analysis-engine/tests/test_dependabot_label_contract.py
@@ -0,0 +1,17 @@
+"""Regression contract for Dependabot's configured repository labels."""
+
+from __future__ import annotations
+
+from pathlib import Path
+
+REPO_ROOT = Path(__file__).resolve().parents[3]
+DEPENDABOT_CONFIG = REPO_ROOT / ".github" / "dependabot.yml"
+
+
+def test_github_actions_updates_use_repository_ci_cd_taxonomy() -> None:
+    """Keep GitHub Actions updates on an existing CI/CD taxonomy label."""
+    config = DEPENDABOT_CONFIG.read_text(encoding="utf-8")
+    github_actions = config.split('package-ecosystem: "github-actions"', maxsplit=1)[1]
+
+    assert '- "area: ci-cd"' in github_actions
+    assert '- "github-actions"' not in github_actions
diff --git a/services/analysis-engine/tests/test_scorecard_pr_code_scanning_contract.py b/services/analysis-engine/tests/test_scorecard_pr_code_scanning_contract.py
new file mode 100644
index 000000000..3d03fd0df
--- /dev/null
+++ b/services/analysis-engine/tests/test_scorecard_pr_code_scanning_contract.py
@@ -0,0 +1,30 @@
+"""Regression contract for OpenSSF Scorecard evidence on pull-request heads."""
+
+from __future__ import annotations
+
+from pathlib import Path
+
+REPO_ROOT = Path(__file__).resolve().parents[3]
+WORKFLOW = REPO_ROOT / ".github" / "workflows" / "ossf-scorecard.yml"
+DEFAULT_BRANCH_GUARD = "github.ref == format('refs/heads/{0}', github.event.repository.default_branch)"
+PR_OR_DEFAULT_BRANCH = f"github.event_name == 'pull_request' || {DEFAULT_BRANCH_GUARD}"
+PR_SAFE_TRUSTED_REF = (
+    "ref: ${{ github.event_name == 'pull_request' && "
+    "github.event.pull_request.base.sha || github.ref_name }}"
+)
+
+
+def test_scorecard_produces_pr_code_scanning_evidence_without_pr_publishing() -> None:
+    """Keep PR SARIF coverage while publishing only trusted default-branch runs."""
+    contents = WORKFLOW.read_text(encoding="utf-8")
+
+    assert "pull_request_target:" not in contents
+    assert "  pull_request:\n    branches:\n      - develop\n      - main\n" in contents
+    assert contents.count(f"if: {PR_OR_DEFAULT_BRANCH}") == 3
+    publish_lines = [
+        line.strip()
+        for line in contents.splitlines()
+        if line.strip().startswith("publish_results:")
+    ]
+    assert publish_lines == [f"publish_results: ${{{{ {DEFAULT_BRANCH_GUARD} }}}}"]
+    assert PR_SAFE_TRUSTED_REF in contents