diff --git a/docs/changelog-develop.md b/docs/changelog-develop.md
index bda8a14..84a323e 100644
--- a/docs/changelog-develop.md
+++ b/docs/changelog-develop.md
@@ -2,6 +2,12 @@
 
 This file documents changes on the develop branch of this project.
 
+## 2026-05-28 — Authentication: session lifecycle
+
+### Added
+- `auth.sessions` with 8h sliding / 30d remember TTLs, lookup-and-refresh, revoke, purge.
+- `UTCDateTime` type decorator in `auth.models` to keep UTC-aware datetimes across SQLite roundtrips.
+
 ## 2026-05-28 — Authentication: audit helper
 
 ### Added