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

packages/agent/gui/agent-gui/agentGuiNode/model/agentGuiConversationActivityMessage.ts

@@ -0,0 +1,64 @@
+import type { AgentActivityMessage } from "@tutti-os/agent-activity-core";
+
+export function resolveAgentGUIConversationActivityMessage(
+  messages: readonly AgentActivityMessage[]
+): string | null {
+  const candidates = messages
+    .filter((message) => {
+      const role = message.role.trim().toLowerCase();
+      return (
+        (role === "assistant" || role === "agent") &&
+        message.semantics?.userVisibleAssistantResponse !== false
+      );
+    })
+    .map((message) => ({
+      message,
+      text: activityMessageText(message)
+    }))
+    .filter((candidate) => candidate.text.length > 0)
+    .sort(
+      (left, right) =>
+        right.message.occurredAtUnixMs - left.message.occurredAtUnixMs ||
+        (right.message.sequence ?? 0) - (left.message.sequence ?? 0) ||
+        right.message.messageId.localeCompare(left.message.messageId)
+    );
+  return candidates[0]?.text ?? null;
+}
+
+function activityMessageText(message: AgentActivityMessage): string {
+  if (message.kind.trim().toLowerCase() === "tool_call") return "";
+  const payload = message.payload;
+  for (const value of [
+    payload.text,
+    payload.content,
+    payload.message,
+    payload.body,
+    payload.title
+  ]) {
+    const text = activityMessageValueText(value);
+    if (text) return text;
+  }
+  return "";
+}
+
+function activityMessageValueText(value: unknown): string {
+  if (typeof value === "string") return compactActivityMessageText(value);
+  if (!Array.isArray(value)) return "";
+  return compactActivityMessageText(
+    value
+      .flatMap((block) => {
+        if (!block || typeof block !== "object" || Array.isArray(block)) {
+          return [];
+        }
+        const record = block as Record<string, unknown>;
+        return record.type === "text" && typeof record.text === "string"
+          ? [record.text]
+          : [];
+      })
+      .join(" ")
+  );
+}
+
+function compactActivityMessageText(value: string): string {
+  return value.replace(/\s+/g, " ").trim();
+}