diff --git a/packages/aelis-core/src/feed.ts b/packages/aelis-core/src/feed.ts
index 073081c..515688d 100644
--- a/packages/aelis-core/src/feed.ts
+++ b/packages/aelis-core/src/feed.ts
@@ -79,6 +79,12 @@ export interface FeedItem<
 	slots?: Record<string, Slot>
 }
 
+/** Takes a FeedItem and returns a JRX node tree for rendering. */
+export type FeedItemRenderer<
+	TType extends string = string,
+	TData extends Record<string, unknown> = Record<string, unknown>,
+> = (item: FeedItem<TType, TData>) => JrxNode
+
 /** A FeedItem with a JRX UI tree attached for client-side rendering. */
 export interface RenderedFeedItem<
 	TType extends string = string,
diff --git a/packages/aelis-core/src/index.ts b/packages/aelis-core/src/index.ts
index bca95e8..5ed8ba2 100644
--- a/packages/aelis-core/src/index.ts
+++ b/packages/aelis-core/src/index.ts
@@ -7,7 +7,7 @@ export type { ActionDefinition } from "./action"
 export { UnknownActionError } from "./action"
 
 // Feed
-export type { FeedItem, FeedItemSignals, RenderedFeedItem, Slot } from "./feed"
+export type { FeedItem, FeedItemRenderer, FeedItemSignals, RenderedFeedItem, Slot } from "./feed"
 export { TimeRelevance } from "./feed"
 
 // Feed Source