diff --git a/backend/modules/prompt/pkg/errno/prompt_test.go b/backend/modules/prompt/pkg/errno/prompt_test.go
new file mode 100644
index 000000000..0c7282213
--- /dev/null
+++ b/backend/modules/prompt/pkg/errno/prompt_test.go
@@ -0,0 +1,30 @@
+// Copyright (c) 2025 coze-dev Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package errno
+
+import (
+	"testing"
+
+	"github.com/cloudwego/kitex/pkg/kerrors"
+	"github.com/stretchr/testify/assert"
+
+	"github.com/coze-dev/coze-loop/backend/pkg/errorx"
+)
+
+func TestWithExtra(t *testing.T) {
+	err := errorx.NewByCode(CommonInternalErrorCode)
+
+	statusErr, ok := errorx.FromStatusError(err)
+	assert.True(t, ok)
+
+	statusErr.WithAffectStability(false)
+	bizErr, ok := kerrors.FromBizStatusError(statusErr)
+	assert.True(t, ok)
+	assert.Equal(t, "0", bizErr.BizExtra()["biz_err_affect_stability"])
+
+	statusErr.WithAffectStability(true)
+	bizErr, ok = kerrors.FromBizStatusError(statusErr)
+	assert.True(t, ok)
+	assert.Equal(t, "1", bizErr.BizExtra()["biz_err_affect_stability"])
+}
diff --git a/backend/pkg/errorx/error.go b/backend/pkg/errorx/error.go
index e6fd84d75..ccf60c082 100644
--- a/backend/pkg/errorx/error.go
+++ b/backend/pkg/errorx/error.go
@@ -17,6 +17,8 @@ import (
 type StatusError interface {
 	error
 	Code() int32
+	IsAffectStability() bool
+	WithAffectStability(affectStability bool)
 	Extra() map[string]string
 	WithExtra(map[string]string)
 }
diff --git a/backend/pkg/errorx/internal/status.go b/backend/pkg/errorx/internal/status.go
index d630ca9f8..ec4996784 100644
--- a/backend/pkg/errorx/internal/status.go
+++ b/backend/pkg/errorx/internal/status.go
@@ -50,6 +50,14 @@ func (w *statusError) Error() string {
 	return fmt.Sprintf("code=%d message=%s", w.statusCode, w.message)
 }
 
+func (w *statusError) IsAffectStability() bool {
+	return w.ext.IsAffectStability
+}
+
+func (w *statusError) WithAffectStability(affectStability bool) {
+	w.ext.IsAffectStability = affectStability
+}
+
 func (w *statusError) Extra() map[string]string {
 	return w.ext.Extra
 }