diff --git a/db/streams.go b/db/streams.go
index 5b689f9..44dfea7 100644
--- a/db/streams.go
+++ b/db/streams.go
@@ -12,7 +12,15 @@ import (
 // JetStream server. It lives here, next to the code that publishes, on purpose:
 // the streams used to be created only by an external Python script
 // (Birock/doormile-bookings/setup_jetstream.py) on another machine, and the two
-// drifted. Four of the eight subjects this app published were bound to no stream
+// drifted.
+//
+// That script has since been reduced to a read-only inspector, because it
+// updated streams with the subject list replaced wholesale. Re-running it would
+// have stripped every subject added here — including booking.assignment_requested,
+// which carries the assignment retry loop itself, so bookings would have stopped
+// reaching riders entirely with nothing logged anywhere. This map is now the only
+// place streams are defined; adding a js.Publish without adding its subject here
+// means the event goes nowhere. Four of the eight subjects this app published were bound to no stream
 // at all — booking.cancelled, booking.outcome, booking.assignment_failed, and
 // chat.room.closed.<id> (CHAT declared the literal "chat.room.closed", which does
 // not match a subject with an extra token). Every publish site is best-effort