diff --git a/.github/workflows/strix-changed-path-quality-ci.yml b/.github/workflows/strix-changed-path-quality-ci.yml
index 31924910a..3521836e8 100644
--- a/.github/workflows/strix-changed-path-quality-ci.yml
+++ b/.github/workflows/strix-changed-path-quality-ci.yml
@@ -10,6 +10,8 @@ on:
       - "docs/doctoring/strix-legal-git-paths.md"
       - "docs/doctoring/strix-model-behavior-error.md"
       - "docs/doctoring/strix-quality-timeout-fixtures.md"
+      - "docs/doctoring/strix-dependency-manifest-trigger.md"
+      - "requirements-strix-ci-hashes.txt"
       - "scripts/ci/strix_quick_gate.sh"
       - "scripts/ci/test_strix_quick_gate.sh"
       - "tests/test_strix_changed_path_policy.py"
@@ -73,3 +75,21 @@ jobs:
           python -m compileall -q tests/test_strix_changed_path_policy.py tests/test_strix_model_behavior_error.py tests/test_strix_nvidia_nim_not_found_fallback.py tests/test_strix_workflow_dependency_hashes.py tests/test_strix_quality_timeout_fixture_budget.py
           bash -n scripts/ci/strix_quick_gate.sh
           git diff --exit-code
+
+      - name: Set up production Strix lock Python
+        uses: actions/setup-python@5fda3b95a4ea91299a34e894583c3862153e4b97 # v7.0.0
+        with:
+          python-version: "3.13"
+
+      - name: Preflight exact hashed Strix dependency closure
+        env:
+          PIP_DISABLE_PIP_VERSION_CHECK: "1"
+          PIP_NO_INPUT: "1"
+        shell: bash --noprofile --norc -e -o pipefail {0}
+        run: |
+          python -m pip install \
+            --dry-run \
+            --ignore-installed \
+            --no-deps \
+            --require-hashes \
+            -r requirements-strix-ci-hashes.txt
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 453691d4f..93104bcb1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -55,6 +55,9 @@ Semantic Versioning where the repository publishes a release.
 
 ### Fixed
 
+- Bound the Strix changed-path quality gate to the complete production hash
+  lock and mirrored production's deliberate `--no-deps` security-override
+  boundary without rejecting source distributions that production accepts.
 - Restored the hourly organization commercial-readiness loop after five
   consecutive startup failures caused by its mandatory but unprovisioned
   `PR_REVIEW_MERGE_TOKEN`. Protected scheduled jobs now prefer that maintainer
diff --git a/docs/doctoring/strix-dependency-manifest-trigger.md b/docs/doctoring/strix-dependency-manifest-trigger.md
new file mode 100644
index 000000000..7d01041b8
--- /dev/null
+++ b/docs/doctoring/strix-dependency-manifest-trigger.md
@@ -0,0 +1,32 @@
+# Strix dependency-manifest quality trigger
+
+## Incident and buyer impact
+
+`requirements-strix-ci-hashes.txt` is executable supply-chain input for the
+organization-required Strix gate. The permanent changed-path quality
+workflow did not list that file. A Dependabot lock-only pull request could
+therefore merge without running the Strix install, policy, shell-regression,
+and full-suite contract.
+
+## Decision
+
+Add the exact repository-root manifest path to
+`.github/workflows/strix-changed-path-quality-ci.yml` and bind it with
+`test_strix_workflow_reruns_when_dependency_manifest_changes`. The same gate
+uses production Python 3.13 to perform a hash-enforced dry-run of every pinned
+lock entry. It mirrors production's deliberate `--no-deps` boundary because
+the reviewed `cryptography==50.0.0` security override is newer than the range
+declared by `strix-agent==1.5.3`; every installed entry is still version- and
+hash-pinned. The preflight permits source distributions because production
+does too, so it does not invent a stricter platform contract. Scanner models,
+credentials, timeouts, and result semantics are unchanged.
+
+## References
+
+National Institute of Standards and Technology. (2024). *Cybersecurity
+supply chain risk management practices for systems and organizations*
+(NIST Special Publication 800-161 Rev. 1).
+https://doi.org/10.6028/NIST.SP.800-161r1
+
+Open Source Security Foundation. (2025). *SLSA specification version 1.2*.
+https://slsa.dev/spec/v1.2/
diff --git a/tests/test_strix_workflow_dependency_hashes.py b/tests/test_strix_workflow_dependency_hashes.py
index e2509c18b..dbdc74548 100644
--- a/tests/test_strix_workflow_dependency_hashes.py
+++ b/tests/test_strix_workflow_dependency_hashes.py
@@ -40,6 +40,33 @@ def test_strix_workflow_reruns_when_hash_contract_changes() -> None:
     assert '      - "tests/test_strix_workflow_dependency_hashes.py"' in workflow
 
 
+def test_strix_workflow_reruns_when_dependency_manifest_changes() -> None:
+    """Changing the Strix dependency lock must trigger its install contract."""
+    workflow = WORKFLOW.read_text(encoding="utf-8")
+
+    assert (ROOT / "requirements-strix-ci-hashes.txt").is_file()
+    assert '      - "requirements-strix-ci-hashes.txt"' in workflow
+    assert '      - "docs/doctoring/strix-dependency-manifest-trigger.md"' in workflow
+
+
+def test_strix_workflow_preflights_dependency_manifest_hashes() -> None:
+    """The specialized gate resolves the production lock with enforced hashes."""
+
+    workflow = WORKFLOW.read_text(encoding="utf-8")
+    preflight = workflow.split(
+        "      - name: Preflight exact hashed Strix dependency closure\n", 1
+    )[1].split("\n      - name:", 1)[0]
+
+    assert 'python-version: "3.13"' in workflow
+    assert "python -m pip install \\" in preflight
+    assert "--dry-run \\" in preflight
+    assert "--ignore-installed \\" in preflight
+    assert "--no-deps \\" in preflight
+    assert "--only-binary=:all:" not in preflight
+    assert "--require-hashes \\" in preflight
+    assert "-r requirements-strix-ci-hashes.txt" in preflight
+
+
 def test_strix_workflow_rejects_branch_selected_manual_dispatch() -> None:
     """Central executable workflows load no branch-selected manual source."""
     workflow = WORKFLOW.read_text(encoding="utf-8")