Bugfixes

internal/engine/article_research.go

@@ -479,6 +479,8 @@ func (e *Engine) executeArticleResearchQuery(ctx context.Context, trigger string
 
 	assessed := e.rankResearchCandidates(ctx, question, fetched, true)
 	accepted := make([]model.ResearchResult, 0, len(assessed))
+	thinkingFilter := e.effectiveThinkingFilter()
+	researchCategories := e.categoriesForNodeIDs(nodeIDs)
 	for _, candidate := range assessed {
 		item := candidate.Result
 		assessment := candidate.Assessment
@@ -493,6 +495,15 @@ func (e *Engine) executeArticleResearchQuery(ctx context.Context, trigger string
 		if question.ExpectActionable && !assessment.Actionable {
 			acceptedByGate = false
 		}
+		researchNode := model.Node{Kind: "external", Origin: "research", URI: item.URL, ExternalID: item.URL, Categories: researchCategories}
+		if !thinkingFilter.Matches(researchNode) {
+			acceptedByGate = false
+			if strings.TrimSpace(item.AssessmentReason) == "" {
+				item.AssessmentReason = "Die Quelle liegt außerhalb des wirksamen Thinking-Quellenfilters."
+			} else {
+				item.AssessmentReason += " · außerhalb des wirksamen Thinking-Quellenfilters"
+			}
+		}
 		metadata := mergeResearchMetadata(startMetadata, map[string]any{"result_url": item.URL, "result_title": item.Title, "relevance": item.Relevance, "source_quality": item.SourceQuality, "source_quality_score": item.SourceQualityScore, "actionable": item.Actionable, "covered_gap_ids": item.CoveredGapIDs, "assessment_reason": item.AssessmentReason})
 		if !acceptedByGate {
 			stats.Rejected++