diff --git a/cmd/launch/claude.go b/cmd/launch/claude.go
index f2af75f0d..1a9700b9e 100644
--- a/cmd/launch/claude.go
+++ b/cmd/launch/claude.go
@@ -76,6 +76,12 @@ func (c *Claude) envVars(model string) []string {
 		"CLAUDE_CODE_DISABLE_FEEDBACK_SURVEY=1",
 	}
 
+	// Ollama does not provide Anthropic's server-side auto-mode checks.
+	// Use Claude Code's client classifier by default, preserving explicit settings.
+	if _, ok := os.LookupEnv("CLAUDE_CODE_AUTO_MODE_SERVER"); !ok {
+		env = append(env, "CLAUDE_CODE_AUTO_MODE_SERVER=0")
+	}
+
 	env = append(env, c.modelEnvVars(model)...)
 	return env
 }
diff --git a/cmd/launch/claude_test.go b/cmd/launch/claude_test.go
index 31f0916b9..2c688ead6 100644
--- a/cmd/launch/claude_test.go
+++ b/cmd/launch/claude_test.go
@@ -375,6 +375,58 @@ func TestClaudeEnvVars(t *testing.T) {
 	}
 }
 
+func TestClaudeRunAutoModeServer(t *testing.T) {
+	if runtime.GOOS == "windows" {
+		t.Skip("uses a POSIX shell fake binary")
+	}
+
+	for _, model := range []string{"llama3.2", "glm-5:cloud"} {
+		for _, tt := range []struct {
+			name  string
+			value string
+			unset bool
+			want  string
+		}{
+			{name: "default", unset: true, want: "0"},
+			{name: "disabled", value: "0", want: "0"},
+			{name: "enabled", value: "1", want: "1"},
+			{name: "empty", value: "", want: ""},
+		} {
+			t.Run(model+"/"+tt.name, func(t *testing.T) {
+				t.Setenv("CLAUDE_CODE_AUTO_MODE_SERVER", tt.value)
+				if tt.unset {
+					if err := os.Unsetenv("CLAUDE_CODE_AUTO_MODE_SERVER"); err != nil {
+						t.Fatal(err)
+					}
+				}
+
+				dir := t.TempDir()
+				output := filepath.Join(dir, "env-and-args")
+				t.Setenv("PATH", dir)
+				t.Setenv("CLAUDE_LAUNCH_TEST_OUTPUT", output)
+				script := `#!/bin/sh
+printf '%s\n' "${CLAUDE_CODE_AUTO_MODE_SERVER-unset}" "$ANTHROPIC_DEFAULT_SONNET_MODEL" "$@" > "$CLAUDE_LAUNCH_TEST_OUTPUT"
+`
+				if err := os.WriteFile(filepath.Join(dir, "claude"), []byte(script), 0o755); err != nil {
+					t.Fatal(err)
+				}
+
+				if err := (&Claude{}).Run(model, nil, []string{"--permission-mode", "auto"}); err != nil {
+					t.Fatal(err)
+				}
+				got, err := os.ReadFile(output)
+				if err != nil {
+					t.Fatal(err)
+				}
+				want := strings.Join([]string{tt.want, model, "--model", model, "--permission-mode", "auto", ""}, "\n")
+				if string(got) != want {
+					t.Fatalf("child environment and arguments = %q, want %q", got, want)
+				}
+			})
+		}
+	}
+}
+
 func TestClaudeModelEnvVars(t *testing.T) {
 	c := &Claude{}