2 files changed, 37 insertions, 1 deletions
diff --git a/tools/lint_project.py b/tools/lint_project.py
index 04d525f..c1c225a 100644
--- a/tools/lint_project.py
+++ b/tools/lint_project.py
@@ -42,7 +42,17 @@ AUTHOR = "cirakg & claude ai"
 HEADER_LINES = 15
 DIAG_FILE = Path("source/util/Diag.mc")
 # Folders that hold local tool state or generated output, never project files.
-SKIP_DIRS = {".git", ".cache", ".claude", "build", "node_modules", "__pycache__", ".pytest_cache", ".mypy_cache", ".ruff_cache"}
+SKIP_DIRS = {
+    ".git",
+    ".cache",
+    ".claude",
+    "build",
+    "node_modules",
+    "__pycache__",
+    ".pytest_cache",
+    ".mypy_cache",
+    ".ruff_cache",
+}
 # Written by a tool that would drop a hand-added header on the next run.
 GENERATED = {Path("docker/docs/package-lock.json")}
 
diff --git a/tools/ui_flow.py b/tools/ui_flow.py
index 8c08caf..3c7afb2 100644
--- a/tools/ui_flow.py
+++ b/tools/ui_flow.py
@@ -437,8 +437,33 @@ def flow_locked_entry(f: Flow) -> None:
     f.expect("list", AUTO_LOCK_TIMEOUT_S)
 
 
+def flow_swipes(f: Flow, screen: str) -> None:
+    """On touch screens a vertical swipe scrolls `screen` once, whatever the
+    watch does with page behaviour; checked through the debug logs so no
+    image is involved. A swipe up must report one scroll; on the list the
+    focus must move and a swipe back must return it."""
+    if not f.touch:
+        return
+    pattern = r"DIAG list_move focus=(\d+)" if screen == "list" else r"DIAG info_scroll first=(\d+)"
+    regex = re.compile(pattern)
+    x, top, bottom = f._w() // 2, f._h() // 4, f._h() * 3 // 4
+    seen: list[str] = []
+    for start, end in ((bottom, top), (top, bottom)):  # swipe up: next; down: previous
+        f.act()
+        f.sim.swipe(x, start, x, end)
+        f.log.wait_for(pattern, SCREEN_TIMEOUT_S)
+        time.sleep(SETTLE_S)
+        found = [m.group(1) for line in f.log.lines()[f.log.mark :] if (m := regex.search(line))]
+        if len(found) != 1:
+            raise FlowError(f"one swipe on {screen} scrolled {len(found)} times, not once")
+        seen.append(found[0])
+    if screen == "list" and seen[0] == seen[1]:
+        raise FlowError("a swipe on the list didn't move the focus")
+
+
 def flow_menu(f: Flow) -> None:
     """The menu, and About on watches whose menu has a focus to move."""
+    flow_swipes(f, "list")
     f.menu()
     time.sleep(MENU_SETTLE_S)
     f.shot("menu")
@@ -454,6 +479,7 @@ def flow_menu(f: Flow) -> None:
         f.select()
         f.expect("about")
         f.shot("about")
+        flow_swipes(f, "about")
         f.act()
     # Touch-only watches show the menu as a freely scrolling list without
     # focus, so there is no reliable "select About"; just close it.