diff --git a/src/cerbero_bite/analysis/data_audit.py b/src/cerbero_bite/analysis/data_audit.py
index d5522e1..561cea6 100644
--- a/src/cerbero_bite/analysis/data_audit.py
+++ b/src/cerbero_bite/analysis/data_audit.py
@@ -126,6 +126,19 @@ def _expected_ticks(since: datetime, until: datetime) -> int:
     return math.ceil(span_seconds / (_TICK_INTERVAL_MIN * 60))
 
 
+def _max_zero_streak(flags: list[int]) -> int:
+    """Longest run of consecutive zeros."""
+    longest = 0
+    current = 0
+    for v in flags:
+        if v == 0:
+            current += 1
+            longest = max(longest, current)
+        else:
+            current = 0
+    return longest
+
+
 def _detect_gaps(timestamps: list[datetime]) -> tuple[GapRecord, ...]:
     """Return gaps where consecutive timestamps differ by > threshold."""
     out: list[GapRecord] = []
diff --git a/tests/unit/test_data_audit.py b/tests/unit/test_data_audit.py
index ff96f1d..a114f06 100644
--- a/tests/unit/test_data_audit.py
+++ b/tests/unit/test_data_audit.py
@@ -7,6 +7,7 @@ from datetime import UTC, datetime
 from cerbero_bite.analysis.data_audit import (  # noqa: PLC2701
     _detect_gaps,
     _expected_ticks,
+    _max_zero_streak,
 )
 
 
@@ -77,3 +78,19 @@ def test_detect_gaps_ignores_threshold_boundary() -> None:
         datetime(2026, 5, 12, 12, 20, tzinfo=UTC),
     ]
     assert _detect_gaps(ts) == ()
+
+
+def test_max_zero_streak_empty() -> None:
+    assert _max_zero_streak([]) == 0
+
+
+def test_max_zero_streak_no_zeros() -> None:
+    assert _max_zero_streak([1, 1, 1, 1]) == 0
+
+
+def test_max_zero_streak_single_zero_block() -> None:
+    assert _max_zero_streak([1, 0, 0, 0, 1, 0, 1]) == 3
+
+
+def test_max_zero_streak_all_zeros() -> None:
+    assert _max_zero_streak([0, 0, 0]) == 3