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

@@ -78,37 +78,59 @@ func runAnalyzeCopyMission(ctx context.Context, step StepContext, deps AnalyzeCo
 		return err
 	}
 
-	result, err := deps.AI.GenerateText(ctx, domai.GenerateRequest{
+	systemPrompt := libviral.BuildMissionResearchMapSystemPrompt()
+	userPrompt := libviral.BuildMissionResearchMapUserPrompt(libviral.CopyResearchMapInput{
+		Label:                  mission.Label,
+		SeedQuery:              mission.SeedQuery,
+		Brief:                  mission.Brief,
+		Persona:                persona.Persona,
+		StyleBenchmark:         persona.StyleBenchmark,
+		PersonaAudienceSummary: persona.CopyResearchMap.AudienceSummary,
+		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: libviral.BuildMissionResearchMapSystemPrompt(),
+		System: systemPrompt,
 		Messages: []domai.Message{
-			{
+			{Role: "user", Content: userPrompt},
-				Role: "user",
-				Content: libviral.BuildMissionResearchMapUserPrompt(libviral.CopyResearchMapInput{
-					Label:                  mission.Label,
-					SeedQuery:              mission.SeedQuery,
-					Brief:                  mission.Brief,
-					Persona:                persona.Persona,
-					StyleBenchmark:         persona.StyleBenchmark,
-					PersonaAudienceSummary: persona.CopyResearchMap.AudienceSummary,
-					PersonaContentGoal:     persona.CopyResearchMap.ContentGoal,
-					PersonaQuestions:       append([]string(nil), persona.CopyResearchMap.Questions...),
-					PersonaPillars:         append([]string(nil), persona.CopyResearchMap.Pillars...),
-				}),
-			},
 		},
-	})
+	}))
 	if err != nil {
 		return err
 	}
 
 	parsed, err := libviral.ParseMissionResearchMapOutput(result.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())
+		// 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))

backend/internal/worker/job/expand_copy_mission_graph.go

@@ -135,11 +135,11 @@ func runExpandCopyMissionGraph(ctx context.Context, step StepContext, deps Expan
 			return app.For(code.AI).SysInternal("knowledge graph llm prompt load failed")
 		}
 		kgVars := map[string]string{
-			"seed":                   seed,
+			"seed":                    seed,
-			"product_brief_line":     libkg.OptionalPromptLine("任務補充", mission.Brief),
+			"product_brief_line":      libkg.OptionalPromptLine("任務補充", mission.Brief),
-			"target_audience_line":   libkg.OptionalPromptLine("目標受眾", mission.ResearchMap.AudienceSummary),
+			"target_audience_line":    libkg.OptionalPromptLine("目標受眾", mission.ResearchMap.AudienceSummary),
-			"persona_line":           libkg.OptionalPromptLine("人設", persona.Persona),
+			"persona_line":            libkg.OptionalPromptLine("人設", persona.Persona),
-			"research_pillars_line":  libkg.BulletPromptLine("內容支柱", mission.ResearchMap.Pillars),
+			"research_pillars_line":   libkg.BulletPromptLine("內容支柱", mission.ResearchMap.Pillars),
 			"research_questions_line": libkg.BulletPromptLine("受眾提問", mission.ResearchMap.Questions),
 		}
 		userPrompt, err = libprompt.KnowledgeGraphLLMUser(kgVars)
@@ -195,12 +195,37 @@ 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 {
-		return app.For(code.AI).SvcThirdParty("延伸知識產生失敗，請重試：" + err.Error())
+		// 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{
@@ -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{
+			if retryGraph, parseErr := libkg.ParseSynthOutput(retryResult.Text, synthIn, braveSources); parseErr == nil && !libkg.GraphTooThin(retryGraph) {
-				Seed:           seed,
-				TargetAudience: mission.ResearchMap.AudienceSummary,
-			}, braveSources); parseErr == nil && !libkg.GraphTooThin(retryGraph) {
 				graph = retryGraph
 			}
 		}