diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7bdb06b..72ccb52 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,24 @@
 # Changelog
 
-## [0.3.0] — unreleased
+## [0.3.1] — 2026-05-29
+
+### Breaking changes
+
+**`RemoteActor` has five new required fields** — struct literals must include them:
+
+| Field | Type | Description |
+|-------|------|-------------|
+| `bio` | `Option<String>` | Actor biography/summary |
+| `banner_url` | `Option<String>` | Banner/header image URL |
+| `followers_url` | `Option<String>` | AP followers collection URL |
+| `following_url` | `Option<String>` | AP following collection URL |
+| `also_known_as` | `Vec<String>` | Account aliases (for Move verification) |
+
+These are populated automatically when k-ap fetches a remote actor (via `from_json`) and when the local `follow()` method constructs a `RemoteActor` from the fetched `DbActor`. Consuming applications only need to add the new fields to their `upsert_remote_actor` / `get_remote_actor` SQL and any custom `RemoteActor` construction sites.
+
+---
+
+## [0.3.0] — 2026-05-28
 
 ### Breaking changes
 
diff --git a/Cargo.lock b/Cargo.lock
index 72b3d9c..060d309 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1368,7 +1368,7 @@ dependencies = [
 
 [[package]]
 name = "k-ap"
-version = "0.3.0"
+version = "0.3.1"
 dependencies = [
  "activitypub_federation",
  "anyhow",
diff --git a/Cargo.toml b/Cargo.toml
index 6b4d497..e3c85ae 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "k-ap"
-version = "0.3.0"
+version = "0.3.1"
 edition = "2024"
 description = "Generic ActivityPub protocol layer"
 license = "MIT"
diff --git a/src/actors.rs b/src/actors.rs
index 9b2138e..5e5f3c4 100644
--- a/src/actors.rs
+++ b/src/actors.rs
@@ -355,6 +355,11 @@ impl Object for DbActor {
             display_name: json.name.clone(),
             avatar_url: json.icon.as_ref().map(|i| i.url.to_string()),
             outbox_url: json.outbox.as_ref().map(|u| u.to_string()),
+            bio: json.summary.clone(),
+            banner_url: json.image.as_ref().map(|i| i.url.to_string()),
+            followers_url: json.followers.as_ref().map(|u| u.to_string()),
+            following_url: json.following.as_ref().map(|u| u.to_string()),
+            also_known_as: json.also_known_as.clone(),
         };
         data.actor_repo.upsert_remote_actor(actor).await?;
 
diff --git a/src/repository/mod.rs b/src/repository/mod.rs
index cb16689..9a020cf 100644
--- a/src/repository/mod.rs
+++ b/src/repository/mod.rs
@@ -30,6 +30,11 @@ pub struct RemoteActor {
     pub display_name: Option<String>,
     pub avatar_url: Option<String>,
     pub outbox_url: Option<String>,
+    pub bio: Option<String>,
+    pub banner_url: Option<String>,
+    pub followers_url: Option<String>,
+    pub following_url: Option<String>,
+    pub also_known_as: Vec<String>,
 }
 
 #[derive(Debug, Clone)]
diff --git a/src/service/follow.rs b/src/service/follow.rs
index 3584a40..40c657c 100644
--- a/src/service/follow.rs
+++ b/src/service/follow.rs
@@ -37,9 +37,14 @@ impl ActivityPubService {
                 .shared_inbox_url
                 .as_ref()
                 .map(|u| u.to_string()),
-            display_name: Some(remote_actor.username.clone()),
+            display_name: remote_actor.display_name.clone().or_else(|| Some(remote_actor.username.clone())),
             avatar_url: remote_actor.avatar_url.as_ref().map(|u| u.to_string()),
             outbox_url: Some(remote_actor.outbox_url.to_string()),
+            bio: remote_actor.bio.clone(),
+            banner_url: remote_actor.banner_url.as_ref().map(|u| u.to_string()),
+            followers_url: Some(remote_actor.followers_url.to_string()),
+            following_url: Some(remote_actor.following_url.to_string()),
+            also_known_as: remote_actor.also_known_as.clone(),
         };
         // Save BEFORE delivering — prevents lost state on process restart.
         data.follow_repo
@@ -382,9 +387,14 @@ impl ActivityPubService {
             handle: format!("{}@{}", target.username, data.domain),
             inbox_url: format!("{}/inbox", target_actor_url),
             shared_inbox_url: None,
-            display_name: Some(target.username),
-            avatar_url: None,
-            outbox_url: None,
+            display_name: target.display_name.or(Some(target.username)),
+            avatar_url: target.avatar_url.as_ref().map(|u| u.to_string()),
+            outbox_url: Some(format!("{}/outbox", target_actor_url)),
+            bio: target.bio,
+            banner_url: target.banner_url.as_ref().map(|u| u.to_string()),
+            followers_url: Some(format!("{}/followers", target_actor_url)),
+            following_url: Some(format!("{}/following", target_actor_url)),
+            also_known_as: target.also_known_as,
         };
         data.follow_repo
             .add_following(local_user_id, target_as_remote, &follow_id)