diff --git a/backend/internal/provider/adobe/client.go b/backend/internal/provider/adobe/client.go
index b377cff..ceaf531 100644
--- a/backend/internal/provider/adobe/client.go
+++ b/backend/internal/provider/adobe/client.go
@@ -38,15 +38,6 @@ var (
 	ErrDeadUpstream      = errors.New("adobe upstream fatal error")
 )
 
-// bodyHasInsufficientCredits reports whether an Adobe response body signals the
-// account has run out of generation credits ("insufficient credits"). Such an
-// account is out of quota for this kind of generation, so it's treated as
-// ErrQuotaExhausted: the pool marks it 限额 (per image/video kind) and fails over
-// to the next account instead of surfacing a hard error to the caller.
-func bodyHasInsufficientCredits(body []byte) bool {
-	return strings.Contains(strings.ToLower(string(body)), "insufficient credit")
-}
-
 var profileURLs = []string{
 	"https://ims-na1.adobelogin.com/ims/profile/v1",
 	"https://adobeid-na1.services.adobe.com/ims/profile/v1",
@@ -468,9 +459,6 @@ func (c *Client) submitImage(ctx context.Context, client tlsclient.HttpClient, t
 	if err != nil {
 		return nil, "", err
 	}
-	if bodyHasInsufficientCredits(respBody) {
-		return respBody, "", ErrQuotaExhausted
-	}
 	if resp.StatusCode == 401 || resp.StatusCode == 403 {
 		if strings.EqualFold(resp.Header.Get("x-access-error"), "taste_exhausted") {
 			return respBody, "", ErrQuotaExhausted
@@ -545,9 +533,6 @@ func (c *Client) pollImage(ctx context.Context, client tlsclient.HttpClient, tok
 		if readErr != nil {
 			return nil, nil, readErr
 		}
-		if bodyHasInsufficientCredits(body) {
-			return nil, nil, ErrQuotaExhausted
-		}
 		if b := string(body); strings.Contains(b, "system under load") || strings.Contains(b, "timeout_error") {
 			return nil, nil, ErrTemporaryUpstream
 		}
@@ -646,9 +631,6 @@ func (c *Client) submitVideo(ctx context.Context, client tlsclient.HttpClient, t
 	if err != nil {
 		return nil, "", err
 	}
-	if bodyHasInsufficientCredits(respBody) {
-		return respBody, "", ErrQuotaExhausted
-	}
 	if resp.StatusCode == 401 || resp.StatusCode == 403 {
 		if strings.EqualFold(resp.Header.Get("x-access-error"), "taste_exhausted") {
 			return respBody, "", ErrQuotaExhausted
@@ -725,9 +707,6 @@ func (c *Client) pollVideo(ctx context.Context, client tlsclient.HttpClient, tok
 		if readErr != nil {
 			return nil, nil, readErr
 		}
-		if bodyHasInsufficientCredits(body) {
-			return nil, nil, ErrQuotaExhausted
-		}
 		if resp.StatusCode == 401 || resp.StatusCode == 403 {
 			return nil, nil, fmt.Errorf("%w (%d %s: %s)", ErrAuth, resp.StatusCode, resp.Header.Get("x-access-error"), clip(body, 300))
 		}
diff --git a/backend/internal/provider/chatgpt/client.go b/backend/internal/provider/chatgpt/client.go
index 01adbca..995a7c8 100644
--- a/backend/internal/provider/chatgpt/client.go
+++ b/backend/internal/provider/chatgpt/client.go
@@ -14,6 +14,7 @@ import (
 	"io"
 	stdhttp "net/http"
 	"net/url"
+	"os"
 	"path/filepath"
 	"strconv"
 	"strings"
@@ -879,6 +880,9 @@ func (c *Client) getConversation(ctx context.Context, session tlsclient.HttpClie
 	if err := ensureOK(resp.StatusCode, body, "conversation_get"); err != nil {
 		return nil, err
 	}
+	if dir := os.Getenv("CHATGPT_DEBUG_DUMP"); dir != "" {
+		_ = os.WriteFile(filepath.Join(dir, fmt.Sprintf("conv-%s-%d.json", conversationID, time.Now().UnixMilli())), body, 0o644)
+	}
 	var payload map[string]any
 	if err := json.Unmarshal(body, &payload); err != nil {
 		return nil, err
diff --git a/backend/internal/provider/chatgpt/util.go b/backend/internal/provider/chatgpt/util.go
index ad62cdb..1f0cfe8 100644
--- a/backend/internal/provider/chatgpt/util.go
+++ b/backend/internal/provider/chatgpt/util.go
@@ -157,8 +157,12 @@ func conversationEndedWithoutImage(conversation map[string]any) bool {
 		}
 		if role == "assistant" {
 			if content, _ := message["content"].(map[string]any); content != nil {
-				if ct := stringValue(content["content_type"]); ct != "" && ct != "text" {
-					return false // code/multimodal turn — generation underway
+				// Only tool-invoking content types mean generation is underway.
+				// Context nodes (model_editable_context, thoughts, …) also appear
+				// on refused turns and must NOT suppress the detection.
+				switch stringValue(content["content_type"]) {
+				case "code", "multimodal_text":
+					return false
 				}
 			}
 		}