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+## [2026-W18] — 2026-04-28
+
+- enable fleet-registry heartbeat with OAuth2 (#46)
+- add CARETAKER_FLEET_SECRET for signed heartbeats (#57)
+- upgrade caretaker v0.19.4 → v0.19.6 (#59)
+- adopt v0.20.0 fleet workflow (OAuth2 envs) (#60)
+- upgrade pin v0.19.6 → v0.25.0 + thin workflow template (#64)
+- drop pip cache from setup-python (#65)