diff --git a/README.md b/README.md
index 51e42a6..34aec89 100644
--- a/README.md
+++ b/README.md
@@ -208,7 +208,10 @@ Switches: `досуг: выкл` as the first line of the file for every day, an
 
 An agreement with a foreign agent on someone else's home server: both print
 one line a day into a vibegram room of their own, and both watch the other's
-silence. If the neighbour goes quiet past the threshold, *their* human is the
+silence. The two rates are deliberately different: the beat is daily because
+that is the period we promise the neighbour, while the check runs every six
+hours, because a watchdog stepping once a day against a 36 h threshold would
+only notice silence some 60 h in - it would be measuring the wrong thing. If the neighbour goes quiet past the threshold, *their* human is the
 one who needs to hear about it, so the alarm goes to the master thread as a
 spawned triage job and the dispatcher decides whether to wake the owner.
 
@@ -226,7 +229,7 @@ are no defaults anywhere in it.
   period is not a constant: it is derived from that job's own registered cron
   (`run.job.cron`). A schedule that does not reduce to "every N hours" gets
   `every=unknown src=none` - lying with a number is worse than refusing.
-- `сторож` (17:42 local) asks for an explicit window (`pending(limit=25)`),
+- `сторож` (`:42` every six hours) asks for an explicit window (`pending(limit=25)`),
   finds the newest `hb claude-kai …`, and compares its age against
   `every * 1.5` where `every` comes **from the neighbour's own line**. The
   clock it trusts is `seen` - when *we* saw the line - not the `at=` inside it,
diff --git a/beaver_agent/jobs/__init__.py b/beaver_agent/jobs/__init__.py
index f7ca1f5..72faf7d 100644
--- a/beaver_agent/jobs/__init__.py
+++ b/beaver_agent/jobs/__init__.py
@@ -31,10 +31,12 @@ jobs = [
     # Сторожевое кольцо с чужим агентом. Кроны читаются в локальной зоне, а
     # сосед печатает свою отметку в 05:00 UTC - вечер по Варшаве разводит нас
     # на полсуток, и его строка лежит в комнате задолго до нашего прогона.
-    # Сторож идёт через полчаса после своей отметки: так «моя запись в комнату
-    # проходит» - свежий факт этих же суток, а не вчерашний.
+    # Частоты тут две, и они разные: отметка суточная (её период мы обещаем
+    # соседу), а проверка - вчетверо чаще. Сторож с шагом в сутки при пороге
+    # 36 ч обнаруживал бы молчание только через ~60 ч, то есть мерил бы не то,
+    # ради чего заведён; чтение 25 событий стоит копейки.
     Job("отметка", beat, cron="12 17 * * *", critical=False),
-    Job("сторож", watch, cron="42 17 * * *", critical=False),
+    Job("сторож", watch, cron="42 */6 * * *", critical=False),
     Job("память", memory, cron="30 4 * * 0", critical=False),
     Job("голосовой", rotate_voice, cron="5 4 * * *", critical=False),
     Job("куратор", curate, cron="0 2,8,12,16,20 * * *", critical=False),
diff --git a/tests/test_heartbeat.py b/tests/test_heartbeat.py
index 2caa3ed..b476cea 100644
--- a/tests/test_heartbeat.py
+++ b/tests/test_heartbeat.py
@@ -253,7 +253,7 @@ class FakeRoom:
 
 
 class FakeRun:
-    def __init__(self, cron="42 17 * * *"):
+    def __init__(self, cron="42 */6 * * *"):
         self.job = SimpleNamespace(cron=cron, name="сторож")
         self.scheduler = SimpleNamespace(tz=WARSAW)
         self.spawned = []
@@ -280,7 +280,7 @@ async def test_watch_job_prints_ack_and_spawns_alarm(tmp_path, monkeypatch):
 
     assert room.limit == 25  # окно запрошено явным размером
     assert room.said and room.said[0].startswith(f"ack {PEER} ")
-    assert "res=24h" in room.said[0]
+    assert "res=6h" in room.said[0]
     assert len(run.spawned) == 1
     agent, title, text = run.spawned[0]
     assert agent == "beaver-triage" and title == "сторож"