diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6a687491..482fcbbb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -38,6 +38,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   `reg.output(..)` (#389).** `OutboundLink` / `InboundLink` take every link
   option and connector extension (`with_qos`, `with_link_codec`,
   `with_depth`, …) and are checked like `link_to` / `link_from`.
+  `builder.connect(..)` returns a handle to start links from without a
+  scheme: `OutboundLink::on(mqtt, "sensors/temp")` (#390).
   ([aimdb-core](aimdb-core/CHANGELOG.md),
   [aimdb-mqtt-connector](aimdb-mqtt-connector/CHANGELOG.md),
   [aimdb-data-contracts](aimdb-data-contracts/CHANGELOG.md))
diff --git a/aimdb-core/CHANGELOG.md b/aimdb-core/CHANGELOG.md
index 62e4690f..a8d4db76 100644
--- a/aimdb-core/CHANGELOG.md
+++ b/aimdb-core/CHANGELOG.md
@@ -36,6 +36,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   `Input<T>` / `Output<T>` traits; a link for the wrong record type or
   direction is a compile error with a readable message.
 
+- **`AimDbBuilder::connect` returns a `ConnectorHandle` (#390).**
+  `OutboundLink::on(handle, "sensors/temp")` / `InboundLink::on(..)` take the
+  connector's scheme; a full URL must match it. A wrong scheme or another
+  builder's handle is reported by `build()`.
+
 - **Build identity and AimX 3.1 (#331).** `AimDbBuilder::build_info`,
   `instance_name` and `instance_uid` (checked by `build()`), and
   `AimDb::identity()`. AimX gains `instance.info` and `instance.post_link`;