diff --git a/docs/changelog-develop.md b/docs/changelog-develop.md
index 6c7edc5..5ff6ef6 100644
--- a/docs/changelog-develop.md
+++ b/docs/changelog-develop.md
@@ -2,6 +2,13 @@
 
 This file documents changes on the develop branch of this project.
 
+## 2026-05-28 — Authentication: hashing + password policy
+
+### Added
+- Argon2id password hashing (`hash_password`, `verify_password`).
+- Server-side password policy (min 12, letter + digit).
+- Opaque hex session-id generator.
+
 ## 2026-05-28 — Authentication: data models
 
 ### Added