Status: IN
Deletes are implemented as tombstone writes (`_TOMBSTONE` sentinel with `is_tombstone=True`) that replicate like normal mutations; `get()` returns `None` for tombstoned keys
Source: entries/2026/05/29/multi-leader-replication-multi_leader.md
def delete(self, key):
ts = self._tick()
self._store[key] = (_TOMBSTONE, ts, self.node_id, True)