Preserve and display the generating model for each assistant reply

server/src/routes.ts

@@ -7,6 +7,7 @@ import { invokeAgentInline, type AgentInlineInvoker } from "./agent-inline.js";
 import { buildInlineAgentThreadContext, decodeChatHistoryCursor, decodeChatListCursor, encodeChatListCursor, loadCompleteChatHistory, readChatHistoryPage } from "./chat-history.js";
 import { containsSybilMention, filterAgentAsideMessages } from "./agent-mention.js";
 import { prisma } from "./db.js";
+import { withMessageGenerations } from "./message-generation.js";
 import { requireAdmin } from "./auth.js";
 import { env } from "./env.js";
 import { buildComparableAttachments } from "./llm/message-content.js";
@@ -1173,11 +1174,12 @@ export async function registerRoutes(app: FastifyInstance, options: { agentInlin
           enabledTools: true,
           userId: true,
           messages: { orderBy: [{ createdAt: "asc" }, { id: "asc" }] },
+          calls: { select: { provider: true, model: true, request: true, error: true, latencyMs: true } },
         },
       });
       if (!source) return { status: "chat-not-found" as const };
 
-      let messages = source.messages;
+      let messages = withMessageGenerations(source.messages, source.calls);
       let selectedMessage: (typeof source.messages)[number] | undefined;
       if (parsed.data.messageId) {
         const selectedIndex = messages.findIndex((message) => message.id === parsed.data.messageId);
@@ -1680,7 +1682,7 @@ export async function registerRoutes(app: FastifyInstance, options: { agentInlin
       },
     });
     if (!chat) return app.httpErrors.notFound("chat not found");
-    return { chat: serializeChatLike(chat) };
+    return { chat: serializeChatLike({ ...chat, messages: withMessageGenerations(chat.messages, chat.calls) }) };
   });
 
   app.post("/v1/chats/:chatId/messages", async (req) => {