fix2

backend/internal/library/viral/mission_research_map.go

@@ -75,6 +75,14 @@ func BuildMissionResearchMapUserPrompt(in CopyResearchMapInput) string {
 	return b.String()
 }
 
+func MissionResearchMapJSONOnlyRetryPrompt() string {
+	return strings.TrimSpace(`上次回覆沒有包含可解析的 JSON。請**只**輸出一個 JSON 物件：
+- 直接以 { 開頭、以 } 結尾，不要任何思考過程、說明文字或 markdown 圍欄
+- 需含 audienceSummary、contentGoal、questions、pillars、exclusions、suggestedTags、benchmarkNotes 欄位
+- suggestedTags 至少 4 項，每項含 tag/reason/searchIntent/searchType
+- 不要使用 ... 省略，也不要加註解或尾端逗號`)
+}
+
 func ParseMissionResearchMapOutput(raw string) (MissionResearchMap, error) {
 	payload, err := extractCopyMapJSON(raw)
 	if err != nil {

backend/internal/worker/job/analyze_copy_mission.go

@@ -78,17 +78,8 @@ func runAnalyzeCopyMission(ctx context.Context, step StepContext, deps AnalyzeCo
 		return err
 	}
 
-	result, err := deps.AI.GenerateText(ctx, domai.GenerateRequest{
-		Provider: providerID,
-		Model:    credential.Model,
-		Credential: domai.Credential{
-			APIKey: credential.APIKey,
-		},
-		System: libviral.BuildMissionResearchMapSystemPrompt(),
-		Messages: []domai.Message{
-			{
-				Role: "user",
-				Content: libviral.BuildMissionResearchMapUserPrompt(libviral.CopyResearchMapInput{
+	systemPrompt := libviral.BuildMissionResearchMapSystemPrompt()
+	userPrompt := libviral.BuildMissionResearchMapUserPrompt(libviral.CopyResearchMapInput{
 		Label:                  mission.Label,
 		SeedQuery:              mission.SeedQuery,
 		Brief:                  mission.Brief,
@@ -98,18 +89,49 @@ func runAnalyzeCopyMission(ctx context.Context, step StepContext, deps AnalyzeCo
 		PersonaContentGoal:     persona.CopyResearchMap.ContentGoal,
 		PersonaQuestions:       append([]string(nil), persona.CopyResearchMap.Questions...),
 		PersonaPillars:         append([]string(nil), persona.CopyResearchMap.Pillars...),
-				}),
-			},
-		},
 	})
+	// ResearchGenerateRequest raises max_tokens so the full research map JSON is
+	// not truncated mid-object (truncation is the main cause of parse failures).
+	result, err := deps.AI.GenerateText(ctx, placement.ResearchGenerateRequest(domai.GenerateRequest{
+		Provider: providerID,
+		Model:    credential.Model,
+		Credential: domai.Credential{
+			APIKey: credential.APIKey,
+		},
+		System: systemPrompt,
+		Messages: []domai.Message{
+			{Role: "user", Content: userPrompt},
+		},
+	}))
 	if err != nil {
 		return err
 	}
 
 	parsed, err := libviral.ParseMissionResearchMapOutput(result.Text)
 	if err != nil {
+		// Model sometimes replies with reasoning/prose and no JSON object.
+		// Retry once, explicitly demanding a raw JSON object.
+		jsonOnlyResult, retryErr := deps.AI.GenerateText(ctx, placement.ResearchGenerateRequest(domai.GenerateRequest{
+			Provider: providerID,
+			Model:    credential.Model,
+			Credential: domai.Credential{
+				APIKey: credential.APIKey,
+			},
+			System: systemPrompt,
+			Messages: []domai.Message{
+				{Role: "user", Content: userPrompt},
+				{Role: "assistant", Content: result.Text},
+				{Role: "user", Content: libviral.MissionResearchMapJSONOnlyRetryPrompt()},
+			},
+		}))
+		if retryErr != nil {
 			return app.For(code.AI).SvcThirdParty("拷貝任務研究地圖 LLM 回傳無法解析：" + err.Error())
 		}
+		parsed, err = libviral.ParseMissionResearchMapOutput(jsonOnlyResult.Text)
+		if err != nil {
+			return app.For(code.AI).SvcThirdParty("拷貝任務研究地圖 LLM 回傳無法解析：" + err.Error())
+		}
+	}
 
 	entityTags := make([]missionentity.SuggestedTag, 0, len(parsed.SuggestedTags))
 	for _, tag := range parsed.SuggestedTags {

backend/internal/worker/job/expand_copy_mission_graph.go

@@ -195,13 +195,38 @@ func runExpandCopyMissionGraph(ctx context.Context, step StepContext, deps Expan
 		return err
 	}
 
-	graph, err := libkg.ParseSynthOutput(result.Text, libkg.SynthInput{
+	synthIn := libkg.SynthInput{
 		Seed:           seed,
 		TargetAudience: mission.ResearchMap.AudienceSummary,
-	}, braveSources)
+	}
+	graph, err := libkg.ParseSynthOutput(result.Text, synthIn, braveSources)
 	if err != nil {
+		// Model occasionally replies with reasoning/prose and no JSON object.
+		// Retry once, explicitly demanding a raw JSON object.
+		jsonOnlyReq := placement.ResearchGenerateRequest(domai.GenerateRequest{
+			Provider: providerID,
+			Model:    credential.Model,
+			Credential: domai.Credential{
+				APIKey: credential.APIKey,
+			},
+			System: systemPrompt,
+			Messages: []domai.Message{
+				{Role: "user", Content: userPrompt},
+				{Role: "assistant", Content: result.Text},
+				{Role: "user", Content: libkg.KnowledgeGraphJSONOnlyRetryPrompt()},
+			},
+		})
+		retryResult, retryErr := deps.AI.GenerateText(ctx, jsonOnlyReq)
+		if retryErr != nil {
 			return app.For(code.AI).SvcThirdParty("延伸知識產生失敗，請重試：" + err.Error())
 		}
+		retryGraph, retryParseErr := libkg.ParseSynthOutput(retryResult.Text, synthIn, braveSources)
+		if retryParseErr != nil {
+			return app.For(code.AI).SvcThirdParty("延伸知識產生失敗，請重試：" + retryParseErr.Error())
+		}
+		graph = retryGraph
+		result = retryResult
+	}
 	if libkg.GraphTooThin(graph) {
 		retryReq := placement.ResearchGenerateRequest(domai.GenerateRequest{
 			Provider: providerID,
@@ -217,10 +242,7 @@ func runExpandCopyMissionGraph(ctx context.Context, step StepContext, deps Expan
 			},
 		})
 		if retryResult, retryErr := deps.AI.GenerateText(ctx, retryReq); retryErr == nil {
-			if retryGraph, parseErr := libkg.ParseSynthOutput(retryResult.Text, libkg.SynthInput{
-				Seed:           seed,
-				TargetAudience: mission.ResearchMap.AudienceSummary,
-			}, braveSources); parseErr == nil && !libkg.GraphTooThin(retryGraph) {
+			if retryGraph, parseErr := libkg.ParseSynthOutput(retryResult.Text, synthIn, braveSources); parseErr == nil && !libkg.GraphTooThin(retryGraph) {
 				graph = retryGraph
 			}
 		}