源码快照 @ 2026-09-01 (source-only, 剔除非源码素材)

packages/agent/gui/shared/agentConversation/agentConversationFollowEndController.ts

@@ -0,0 +1,35 @@
+export type AgentConversationFollowEndMode = "following" | "detached";
+
+export type AgentConversationFollowEndEvent =
+  | "conversation-changed"
+  | "prompt-submitted"
+  | "scroll-to-end-requested"
+  | "user-reached-end"
+  | "user-scrolled-away";
+
+export interface AgentConversationFollowEndController {
+  dispatch(
+    event: AgentConversationFollowEndEvent
+  ): AgentConversationFollowEndMode;
+  getSnapshot(): AgentConversationFollowEndMode;
+}
+
+function nextFollowEndMode(
+  event: AgentConversationFollowEndEvent
+): AgentConversationFollowEndMode {
+  return event === "user-scrolled-away" ? "detached" : "following";
+}
+
+export function createAgentConversationFollowEndController(): AgentConversationFollowEndController {
+  let mode: AgentConversationFollowEndMode = "following";
+
+  return {
+    dispatch(event) {
+      mode = nextFollowEndMode(event);
+      return mode;
+    },
+    getSnapshot() {
+      return mode;
+    }
+  };
+}