update

backend/database.py

@@ -1186,6 +1186,23 @@ async def default_subblock_levels(topic: str, block_norm: str) -> None:
     await db.commit()
 
 
+async def delete_stale_consensus(topic: str, block_norm: str, keep: set[str]) -> None:
+    """Drop consensus rows of a block that are NOT in this run's sidecar (`keep`): finalize
+    only upserts, so re-runs piled up orphan rows (measured: 25 subs without any board-2
+    output). variant/discarded rows stay — QA reads those statuses."""
+    db = await get_db()
+    cursor = await db.execute(
+        "SELECT sub_norm FROM subblocks WHERE topic = ? AND block_norm = ? AND status = 'consensus'",
+        (topic, block_norm))
+    rows = await cursor.fetchall()
+    stale = [r[0] for r in rows if r[0] not in keep]
+    for sn in stale:
+        await db.execute("DELETE FROM subblocks WHERE topic = ? AND block_norm = ? AND sub_norm = ?",
+                         (topic, block_norm, sn))
+    if stale:
+        await db.commit()
+
+
 async def set_subblock_fields(topic: str, block_norm: str, sub_norm: str, **fields) -> None:
     """Set fields (level/relevance/status/sub_title) of a subblock row."""
     fields["updated_at"] = _now()