diff --git a/README.md b/README.md
index 219b48f..4a16ef3 100644
--- a/README.md
+++ b/README.md
@@ -214,7 +214,7 @@ The tag starts the caller's publisher. Keep PyPI trusted publishing in that top-
 read-only job alongside the tagged-source build, and make publishing depend on both. Repositories with the standard `uv`
 wheel and sdist build can call `validate-python-release.yaml` in the tag publisher. The
 [self-release workflow](.github/workflows/release.yaml) shows the GitHub Release path; callers keep their ecosystem
-uploads. The read-only build workflow checks the tagged source and renders the Release body. The tag caller alone has a
+uploads. The read-only build workflow checks the tagged source. The tag caller renders the Release body and has the only
 Contents write job that creates the GitHub Release.
 
 ## Validate a Python release
@@ -474,9 +474,9 @@ checkout or GitHub state.
       tag: ${{ github.ref_name }}
 ```
 
-`tag` is required. `executable` defaults to `release-creator` on `PATH` and accepts a path to a locked installation. The
-`previous` output is empty when this is the first matching release. Pass it as `previous_tag_name` to GitHub's
-generated-notes endpoint only when nonempty.
+`tag` is required. Install `release-creator` on `PATH` before calling the Action. The `previous` output is empty when
+this is the first matching release. Pass it as `previous_tag_name` to GitHub's generated-notes endpoint only when
+nonempty.
 
 ## Reconcile PyPI artifacts
 
diff --git a/changelog.d/+correct-action-contract.doc.md b/changelog.d/+correct-action-contract.doc.md
new file mode 100644
index 0000000..9bb5f57
--- /dev/null
+++ b/changelog.d/+correct-action-contract.doc.md
@@ -0,0 +1 @@
+Correct the documented release validation and previous-tag Action interfaces.
diff --git a/changelog.d/+review-release-creator-066.change.md b/changelog.d/+review-release-creator-066.change.md
new file mode 100644
index 0000000..0d7dbce
--- /dev/null
+++ b/changelog.d/+review-release-creator-066.change.md
@@ -0,0 +1 @@
+Accept release-creator 0.6.6 in caller locks under its reviewed PyPI upload cutoff.
diff --git a/tests/refresh_release_lock/test_cutoffs.py b/tests/refresh_release_lock/test_cutoffs.py
index f50760d..388c3df 100644
--- a/tests/refresh_release_lock/test_cutoffs.py
+++ b/tests/refresh_release_lock/test_cutoffs.py
@@ -64,7 +64,15 @@ def test_expire_cutoffs_removes_empty_package_table(cutoff_project: Path) -> Non
     assert "packages" not in tomllib.loads(updated)["tool"]["nab"]
 
 
-@pytest.mark.parametrize("reviewed", ["2026-10-23T02:44:40Z", "2026-10-23T16:52:06Z"])
+@pytest.mark.parametrize(
+    "reviewed",
+    [
+        pytest.param("2026-10-23T02:44:40Z", id="0.6.0"),
+        pytest.param("2026-10-23T16:52:06Z", id="0.6.4"),
+        pytest.param("2026-10-23T19:54:50Z", id="0.6.5"),
+        pytest.param("2026-10-23T20:48:24Z", id="0.6.6"),
+    ],
+)
 def test_expire_cutoffs_removes_each_reviewed_release_creator_floor(reviewed: str) -> None:
     project = (
         '[tool.nab]\nuploaded-prior-to = "P7D"\n'
@@ -202,6 +210,8 @@ def test_check_nab_lock_rejects_forged_upload_time(
         pytest.param("release-creator", "2026-10-23T16:52:07Z", False, id="extended-release-creator"),
         pytest.param("release-creator", "2026-10-23T19:54:50Z", True, id="reviewed-release-creator-0.6.5"),
         pytest.param("release-creator", "2026-10-23T19:54:51Z", False, id="extended-release-creator-0.6.5"),
+        pytest.param("release-creator", "2026-10-23T20:48:24Z", True, id="reviewed-release-creator-0.6.6"),
+        pytest.param("release-creator", "2026-10-23T20:48:25Z", False, id="extended-release-creator-0.6.6"),
         pytest.param("unreviewed", "2026-10-22T00:00:00Z", False, id="new-package"),
     ],
 )
diff --git a/tools/nab_cutoffs.py b/tools/nab_cutoffs.py
index f33dc38..9a8f03b 100644
--- a/tools/nab_cutoffs.py
+++ b/tools/nab_cutoffs.py
@@ -23,6 +23,7 @@
     ("release-creator", "0.6.0"): datetime(2026, 10, 23, 2, 44, 40, tzinfo=UTC),
     ("release-creator", "0.6.4"): datetime(2026, 10, 23, 16, 52, 6, tzinfo=UTC),
     ("release-creator", "0.6.5"): datetime(2026, 10, 23, 19, 54, 50, tzinfo=UTC),
+    ("release-creator", "0.6.6"): datetime(2026, 10, 23, 20, 48, 24, tzinfo=UTC),
     ("uv-build", "0.13.4"): datetime(2026, 10, 21, tzinfo=UTC),
 }
 _REVIEWED_EXCEPTIONS: Final = {