added auto-continue mechanics, updated default ctx to 262144 tokens

main_test.go

@@ -1124,6 +1124,49 @@ func TestALToolLoop(t *testing.T) {
   }
 }
 
+func TestALReasoningOnlyAutoContinue(t *testing.T) {
+  // First response is reasoning-only (no content, no tool calls); the agent
+  // must auto-append a "continue" user message and keep looping until a real
+  // answer arrives.
+  srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+    var req struct {
+      Messages []Message `json:"messages"`
+    }
+    if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
+      t.Errorf("decode request: %v", err)
+    }
+    for _, m := range req.Messages {
+      if m.Role == "user" && m.Content != nil && strings.TrimSpace(*m.Content) == "continue" {
+        w.Write([]byte(`{"choices":[{"message":{"role":"assistant","content":"final answer"}}]}`))
+        return
+      }
+    }
+    w.Write([]byte(`{"choices":[{"message":{"role":"assistant","content":null,"reasoning_content":"thinking hard"}}]}`))
+  }))
+  defer srv.Close()
+
+  cfg := defCfg
+  cfg.Endpoint = srv.URL
+  cfg.Stream = false
+  cfg.APIKey = "-"
+  msgs, _, err := AL(context.Background(), &cfg, []Message{{Role: "system", Content: strp("sys")}, {Role: "user", Content: strp("start")}}, "sys", 0)
+  if err != nil {
+    t.Fatalf("AL: %v", err)
+  }
+  if got := last(msgs); got != "final answer" {
+    t.Errorf("last = %q, want %q", got, "final answer")
+  }
+  var continues int
+  for _, m := range msgs {
+    if m.Role == "user" && m.Content != nil && strings.TrimSpace(*m.Content) == "continue" {
+      continues++
+    }
+  }
+  if continues != 1 {
+    t.Errorf("expected exactly 1 auto continue message, got %d", continues)
+  }
+}
+
 func TestALRunSubagent(t *testing.T) {
   var n int
   var mu sync.Mutex
@@ -1842,12 +1885,12 @@ func TestFetchContextWindowFallbackConfig(t *testing.T) {
     t.Errorf("expected fallback to raw context_window 65536, got %d", cw)
   }
 
-  // Case 2: Config does not specify context_window -> default 200000
+  // Case 2: Config does not specify context_window -> default 262144
   cfg2 := defCfg
   cfg2.Endpoint = srv.URL
   cfg2.Raw = map[string]string{}
-  if cw := fetchContextWindow(&cfg2); cw != 200000 {
-    t.Errorf("expected default 200000, got %d", cw)
+  if cw := fetchContextWindow(&cfg2); cw != 262144 {
+    t.Errorf("expected default 262144, got %d", cw)
   }
 }