diff --git a/docs/workflow-adoption-model.md b/docs/workflow-adoption-model.md
index 38ce0ff..91888f6 100644
--- a/docs/workflow-adoption-model.md
+++ b/docs/workflow-adoption-model.md
@@ -109,3 +109,23 @@ Before accepting a new shared workflow:
 - Are permissions least-privilege?
 - Are third-party actions pinned according to project policy?
 - Does the consumer have a documented update and divergence path?
+
+## Consumer lock provenance
+
+Materialized workflow consumers use `.github/actions-lock.txt` as a management
+and provenance record.
+
+New lock entries use SHA-256 and record:
+
+- the installed workflow filename;
+- the catalog workflow digest;
+- the released `github-workflows` platform version;
+- the immutable `github-workflows` source commit used by the updater;
+- the exact `LibreCodeCoop/.github` catalog commit checked out by the run.
+
+Legacy two-column MD5 locks remain readable. The next successful synchronization
+migrates them deterministically to the provenance format without rewriting a
+workflow when its effective bytes are unchanged.
+
+The consumer-local `<workflow>.patch` remains authoritative for deliberate
+local differences, and unexplained divergence continues to fail closed.
diff --git a/patches/nextcloud/sync-workflow-templates.yml.patch b/patches/nextcloud/sync-workflow-templates.yml.patch
index 59a4472..2714f63 100644
--- a/patches/nextcloud/sync-workflow-templates.yml.patch
+++ b/patches/nextcloud/sync-workflow-templates.yml.patch
@@ -33,7 +33,7 @@
  
      name: Update workflows in ${{ matrix.branches }}
  
-@@ -42,12 +45,105 @@
+@@ -42,12 +45,111 @@
          with:
            require: admin
  
@@ -137,10 +137,16 @@
            path: source
 -          repository: nextcloud/.github
 +          repository: LibreCodeCoop/.github
++
++      - name: Record workflow catalog revision
++        id: catalog-revision
++        working-directory: source
++        shell: bash
++        run: echo "sha=$(git rev-parse HEAD)" >> "$GITHUB_OUTPUT"
  
        - name: Checkout app
          uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
-@@ -56,86 +152,30 @@
+@@ -56,86 +158,33 @@
            path: target
            ref: ${{ matrix.branches }}
  
@@ -209,10 +215,13 @@
 -          echo "DRAFT_ONLY=${draft_only}" >> $GITHUB_ENV
 +      - name: Synchronize workflow templates
 +        id: sync
-+        uses: LibreCodeCoop/github-workflows/actions/sync-workflows@42333e05774f13b83283314079d03614a8beaf82 # v0.1.0
++        uses: LibreCodeCoop/github-workflows/actions/sync-workflows@002f17274ba1eade3351ba81890bf53674b37c43 # v0.4.0
 +        with:
 +          source: source/workflow-templates
 +          target: target
++          platform-version: v0.4.0
++          source-commit: 002f17274ba1eade3351ba81890bf53674b37c43
++          catalog-commit: ${{ steps.catalog-revision.outputs.sha }}
  
        - name: Create Pull Request
 +        if: ${{ steps.sync.outputs.changed == 'true' }}
diff --git a/tests/test_portable_workflow_sync_auth.py b/tests/test_portable_workflow_sync_auth.py
index e6a24c4..bac0ac7 100644
--- a/tests/test_portable_workflow_sync_auth.py
+++ b/tests/test_portable_workflow_sync_auth.py
@@ -42,6 +42,24 @@ def test_github_token_limitation_is_visible_in_template(self) -> None:
             content,
         )
 
+    def test_sync_action_is_pinned_with_release_and_catalog_provenance(self) -> None:
+        content = TEMPLATE.read_text(encoding="utf-8")
+
+        self.assertIn(
+            "actions/sync-workflows@002f17274ba1eade3351ba81890bf53674b37c43 # v0.4.0",
+            content,
+        )
+        self.assertIn("platform-version: v0.4.0", content)
+        self.assertIn(
+            "source-commit: 002f17274ba1eade3351ba81890bf53674b37c43",
+            content,
+        )
+        self.assertIn("id: catalog-revision", content)
+        self.assertIn(
+            "catalog-commit: ${{ steps.catalog-revision.outputs.sha }}",
+            content,
+        )
+
 
 if __name__ == "__main__":
     unittest.main()
diff --git a/workflow-templates/sync-workflow-templates.yml b/workflow-templates/sync-workflow-templates.yml
index 69f1612..e41ce4e 100644
--- a/workflow-templates/sync-workflow-templates.yml
+++ b/workflow-templates/sync-workflow-templates.yml
@@ -145,6 +145,12 @@ jobs:
           path: source
           repository: LibreCodeCoop/.github
 
+      - name: Record workflow catalog revision
+        id: catalog-revision
+        working-directory: source
+        shell: bash
+        run: echo "sha=$(git rev-parse HEAD)" >> "$GITHUB_OUTPUT"
+
       - name: Checkout app
         uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
@@ -154,10 +160,13 @@ jobs:
 
       - name: Synchronize workflow templates
         id: sync
-        uses: LibreCodeCoop/github-workflows/actions/sync-workflows@42333e05774f13b83283314079d03614a8beaf82 # v0.1.0
+        uses: LibreCodeCoop/github-workflows/actions/sync-workflows@002f17274ba1eade3351ba81890bf53674b37c43 # v0.4.0
         with:
           source: source/workflow-templates
           target: target
+          platform-version: v0.4.0
+          source-commit: 002f17274ba1eade3351ba81890bf53674b37c43
+          catalog-commit: ${{ steps.catalog-revision.outputs.sha }}
 
       - name: Create Pull Request
         if: ${{ steps.sync.outputs.changed == 'true' }}