Add configurable transient retries for CLI execution

internal/config/config_test.go

@@ -239,6 +239,44 @@ server:
 	}
 }
 
+func TestLoadConfigPreservesTransientRetryPresence(t *testing.T) {
+	for _, tc := range []struct {
+		name string
+		body string
+		want *int
+	}{
+		{name: "omitted", body: "prompt_dir: ./prompts\n"},
+		{name: "null", body: "transient_retries: null\n"},
+		{name: "zero", body: "transient_retries: 0\n", want: intPointer(0)},
+		{name: "positive", body: "transient_retries: 3\n", want: intPointer(3)},
+	} {
+		t.Run(tc.name, func(t *testing.T) {
+			settings, err := LoadConfig(writeConfigFile(t, "config.yml", tc.body), true)
+			if err != nil {
+				t.Fatal(err)
+			}
+			if !reflect.DeepEqual(settings.TransientRetries, tc.want) {
+				t.Fatalf("retry setting: got %v, want %v", settings.TransientRetries, tc.want)
+			}
+		})
+	}
+	for _, tc := range []struct {
+		body string
+		want error
+	}{
+		{body: "transient_retries: -1\n", want: ErrInvalidConfig},
+		{body: "transient_retries: wrong\n", want: ErrInvalidConfigYAML},
+		{body: "transient_retries: 1.5\n", want: ErrInvalidConfigYAML},
+	} {
+		_, err := LoadConfig(writeConfigFile(t, "config.yml", tc.body), true)
+		if !errors.Is(err, tc.want) {
+			t.Fatalf("body %q: expected %v, got %v", tc.body, tc.want, err)
+		}
+	}
+}
+
+func intPointer(value int) *int { return &value }
+
 func TestLoadConfigRejectsNegativeHTTPSizeLimits(t *testing.T) {
 	tests := []struct {
 		name string