diff --git a/crates/adapters/activitypub-base/src/activities.rs b/crates/adapters/activitypub-base/src/activities.rs
index 14d093e..e139377 100644
--- a/crates/adapters/activitypub-base/src/activities.rs
+++ b/crates/adapters/activitypub-base/src/activities.rs
@@ -13,6 +13,16 @@ use url::Url;
 #[serde(rename = "Announce")]
 pub struct AnnounceType;
 
+#[derive(Clone, Debug, Deserialize, Serialize)]
+#[serde(rename = "Like")]
+pub struct LikeType;
+
+impl Default for LikeType {
+    fn default() -> Self {
+        Self
+    }
+}
+
 use crate::actors::DbActor;
 use crate::data::FederationData;
 use crate::error::Error;
@@ -511,6 +521,18 @@ impl Activity for AnnounceActivity {
     }
 }
 
+// --- Like ---
+
+#[derive(Clone, Debug, Deserialize, Serialize)]
+#[serde(rename_all = "camelCase")]
+pub struct LikeActivity {
+    pub id: Url,
+    #[serde(rename = "type")]
+    pub kind: LikeType,
+    pub actor: ObjectId<DbActor>,
+    pub object: Url,
+}
+
 // --- Add ---
 
 #[derive(Clone, Default, Debug, Serialize, Deserialize)]
diff --git a/crates/adapters/activitypub-base/src/content.rs b/crates/adapters/activitypub-base/src/content.rs
index 83aad72..71eabc2 100644
--- a/crates/adapters/activitypub-base/src/content.rs
+++ b/crates/adapters/activitypub-base/src/content.rs
@@ -42,6 +42,16 @@ pub trait ApObjectHandler: Send + Sync {
     /// Actor unfollowed/was removed — clean up all their remote content.
     async fn on_actor_removed(&self, actor_url: &Url) -> anyhow::Result<()>;
 
+    /// Called when a remote actor likes a local thought.
+    /// `object_url` is the AP URL of the liked note (e.g. `{base}/thoughts/{uuid}`).
+    /// `actor_url` is the AP URL of the remote actor who sent the Like.
+    async fn on_like(&self, object_url: &Url, actor_url: &Url) -> anyhow::Result<()>;
+
+    /// Called when a remote actor boosts (Announce) a local thought.
+    /// `object_url` is the AP URL of the announced note.
+    /// `actor_url` is the AP URL of the remote actor who sent the Announce.
+    async fn on_announce_received(&self, object_url: &Url, actor_url: &Url) -> anyhow::Result<()>;
+
     /// Total number of locally-authored posts across all users.
     async fn count_local_posts(&self) -> anyhow::Result<u64>;
 }
diff --git a/crates/adapters/activitypub/src/handler.rs b/crates/adapters/activitypub/src/handler.rs
index 54000cc..242adda 100644
--- a/crates/adapters/activitypub/src/handler.rs
+++ b/crates/adapters/activitypub/src/handler.rs
@@ -170,6 +170,14 @@ impl ApObjectHandler for ThoughtsObjectHandler {
             .map_err(|e| anyhow!("{e}"))
     }
 
+    async fn on_like(&self, _object_url: &Url, _actor_url: &Url) -> Result<()> {
+        Ok(())
+    }
+
+    async fn on_announce_received(&self, _object_url: &Url, _actor_url: &Url) -> Result<()> {
+        Ok(())
+    }
+
     async fn count_local_posts(&self) -> Result<u64> {
         self.repo
             .count_local_notes()