diff --git a/plugins/leaf/skills/leaf/scripts/leaf/render_gate/models.py b/plugins/leaf/skills/leaf/scripts/leaf/render_gate/models.py
index 79a2f3401..8e7ede80c 100644
--- a/plugins/leaf/skills/leaf/scripts/leaf/render_gate/models.py
+++ b/plugins/leaf/skills/leaf/scripts/leaf/render_gate/models.py
@@ -19,6 +19,7 @@ class _SchemeContext:
     replayed: bool
     unsettled: list
 
+
 @dataclass(frozen=True, slots=True)
 class _SchemeReadings:
     failsoft: list
diff --git a/plugins/leaf/skills/leaf/scripts/leaf/render_gate/preview.py b/plugins/leaf/skills/leaf/scripts/leaf/render_gate/preview.py
index 9b6c244da..676c0a345 100644
--- a/plugins/leaf/skills/leaf/scripts/leaf/render_gate/preview.py
+++ b/plugins/leaf/skills/leaf/scripts/leaf/render_gate/preview.py
@@ -49,6 +49,7 @@ def preview_server(
         finally:
             httpd.shutdown()
 
+
 @contextlib.contextmanager
 def preview_source_server(
     page_dir: Path,
diff --git a/plugins/leaf/skills/leaf/scripts/leaf/render_gate/scheme.py b/plugins/leaf/skills/leaf/scripts/leaf/render_gate/scheme.py
index 5b78e5e1e..ed914d696 100644
--- a/plugins/leaf/skills/leaf/scripts/leaf/render_gate/scheme.py
+++ b/plugins/leaf/skills/leaf/scripts/leaf/render_gate/scheme.py
@@ -30,11 +30,13 @@ def served(page, url: str, path: str, timeout_ms: int | None = None):
     timeout_ms = SERVED_TIMEOUT_MS if timeout_ms is None else timeout_ms
     return page.request.get(urljoin(url, path), timeout=timeout_ms)
 
+
 def previous_stamp(revision: int, versions: list[dict]) -> dict | None:
     """The newest stamped revision before ``revision``, if one exists."""
     earlier = [version for version in versions if version["revision"] < revision]
     return max(earlier, key=lambda version: version["revision"]) if earlier else None
 
+
 def rendered_revision(url: str, state: dict) -> int:
     """Resolve the immutable revision shown at ``url`` from the public state."""
     name = Path(urlsplit(url).path).name
@@ -54,9 +56,11 @@ def rendered_revision(url: str, state: dict) -> int:
 def resize_observer_error(text: str) -> bool:
     return text.startswith(RESIZE_OBSERVER_ERROR)
 
+
 def recurring_resize_observer_error(unit: str) -> str:
     return f"{RESIZE_OBSERVER_ERROR} notice recurred on the confirming {unit}"
 
+
 def _render_scheme(browser, url, scheme, served_timeout_ms, opened_pages):
     """Read and report the browser gate for one color scheme."""
     from playwright.sync_api import Error as PlaywrightError
diff --git a/plugins/leaf/skills/leaf/scripts/leaf/render_gate/version.py b/plugins/leaf/skills/leaf/scripts/leaf/render_gate/version.py
index 9d1a722b5..30feff33a 100644
--- a/plugins/leaf/skills/leaf/scripts/leaf/render_gate/version.py
+++ b/plugins/leaf/skills/leaf/scripts/leaf/render_gate/version.py
@@ -62,6 +62,7 @@ def _render_version_attempt(
         light_complete and dark_complete,
     )
 
+
 def render_version(browser, url: str, served_timeout_ms: int | None = None) -> list:
     """Read a version, confirming a complete attempt that reports a ResizeObserver
     loop notice.