feat: move heartbeat config to agent.heartbeat

src/auto-reply/reply.triggers.test.ts

@@ -101,6 +101,38 @@ describe("trigger handling", () => {
     });
   });
 
+  it("uses heartbeat model override for heartbeat runs", async () => {
+    await withTempHome(async (home) => {
+      vi.mocked(runEmbeddedPiAgent).mockResolvedValue({
+        payloads: [{ text: "ok" }],
+        meta: {
+          durationMs: 1,
+          agentMeta: { sessionId: "s", provider: "p", model: "m" },
+        },
+      });
+
+      const cfg = makeCfg(home);
+      cfg.agent = {
+        ...cfg.agent,
+        heartbeat: { model: "anthropic/claude-haiku-4-5-20251001" },
+      };
+
+      await getReplyFromConfig(
+        {
+          Body: "hello",
+          From: "+1002",
+          To: "+2000",
+        },
+        { isHeartbeat: true },
+        cfg,
+      );
+
+      const call = vi.mocked(runEmbeddedPiAgent).mock.calls[0]?.[0];
+      expect(call?.provider).toBe("anthropic");
+      expect(call?.model).toBe("claude-haiku-4-5-20251001");
+    });
+  });
+
   it("updates group activation when the owner sends /activation", async () => {
     await withTempHome(async (home) => {
       const cfg = makeCfg(home);

src/auto-reply/reply.ts

@@ -169,14 +169,25 @@ export async function getReplyFromConfig(
   const agentCfg = cfg.agent;
   const sessionCfg = cfg.session;
 
-  const { provider: defaultProvider, model: defaultModel } =
-    resolveConfiguredModelRef({
-      cfg,
-      defaultProvider: DEFAULT_PROVIDER,
-      defaultModel: DEFAULT_MODEL,
-    });
+  const mainModel = resolveConfiguredModelRef({
+    cfg,
+    defaultProvider: DEFAULT_PROVIDER,
+    defaultModel: DEFAULT_MODEL,
+  });
+  const defaultProvider = mainModel.provider;
+  const defaultModel = mainModel.model;
   let provider = defaultProvider;
   let model = defaultModel;
+  if (opts?.isHeartbeat) {
+    const heartbeatRaw = agentCfg?.heartbeat?.model?.trim() ?? "";
+    const heartbeatRef = heartbeatRaw
+      ? parseModelRef(heartbeatRaw, defaultProvider)
+      : null;
+    if (heartbeatRef) {
+      provider = heartbeatRef.provider;
+      model = heartbeatRef.model;
+    }
+  }
   let contextTokens =
     agentCfg?.contextTokens ??
     lookupContextTokens(model) ??