diff --git a/internal/ai/runtime/internal/impl/callbacks/runlog_callback.go b/internal/ai/runtime/internal/impl/callbacks/runlog_callback.go
index e1211dd..4e00604 100644
--- a/internal/ai/runtime/internal/impl/callbacks/runlog_callback.go
+++ b/internal/ai/runtime/internal/impl/callbacks/runlog_callback.go
@@ -79,6 +79,7 @@ func (c *RuntimeTraceCollector) SetRetrieverSummary(summary RetrieverTraceSummar
 	c.Data.Retriever.EmbeddingMs = summary.EmbeddingMs
 	c.Data.Retriever.VectorSearchMs = summary.VectorSearchMs
 	c.Data.Retriever.HydrateMs = summary.HydrateMs
+	c.Data.Retriever.Policies = append([]RetrieverPolicyTraceItem(nil), summary.Policies...)
 }
 
 func (c *RuntimeTraceCollector) AddToolItem(item ToolTraceItem) {
diff --git a/internal/ai/runtime/internal/impl/callbacks/trace_callback.go b/internal/ai/runtime/internal/impl/callbacks/trace_callback.go
index 5e45c3f..9410072 100644
--- a/internal/ai/runtime/internal/impl/callbacks/trace_callback.go
+++ b/internal/ai/runtime/internal/impl/callbacks/trace_callback.go
@@ -50,6 +50,13 @@ type RetrieverTraceSummary struct {
 	EmbeddingMs      int64
 	VectorSearchMs   int64
 	HydrateMs        int64
+	Policies         []RetrieverPolicyTraceItem
+}
+
+type RetrieverPolicyTraceItem struct {
+	KnowledgeBaseID int64   `json:"knowledgeBaseId,omitempty"`
+	TopK            int     `json:"topK,omitempty"`
+	ScoreThreshold  float64 `json:"scoreThreshold,omitempty"`
 }
 
 type InstructionTraceSummary struct {
@@ -92,15 +99,16 @@ type RuntimeTraceData struct {
 		CurrentUserMessagePreview string   `json:"currentUserMessagePreview,omitempty"`
 	} `json:"input"`
 	Retriever struct {
-		Count            int                  `json:"count,omitempty"`
-		TopK             int                  `json:"topK,omitempty"`
-		ScoreThreshold   float64              `json:"scoreThreshold,omitempty"`
-		ContextMaxTokens int                  `json:"contextMaxTokens,omitempty"`
-		ContextCount     int                  `json:"contextCount,omitempty"`
-		EmbeddingMs      int64                `json:"embeddingMs,omitempty"`
-		VectorSearchMs   int64                `json:"vectorSearchMs,omitempty"`
-		HydrateMs        int64                `json:"hydrateMs,omitempty"`
-		Items            []RetrieverTraceItem `json:"items,omitempty"`
+		Count            int                        `json:"count,omitempty"`
+		TopK             int                        `json:"topK,omitempty"`
+		ScoreThreshold   float64                    `json:"scoreThreshold,omitempty"`
+		ContextMaxTokens int                        `json:"contextMaxTokens,omitempty"`
+		ContextCount     int                        `json:"contextCount,omitempty"`
+		EmbeddingMs      int64                      `json:"embeddingMs,omitempty"`
+		VectorSearchMs   int64                      `json:"vectorSearchMs,omitempty"`
+		HydrateMs        int64                      `json:"hydrateMs,omitempty"`
+		Policies         []RetrieverPolicyTraceItem `json:"policies,omitempty"`
+		Items            []RetrieverTraceItem       `json:"items,omitempty"`
 	} `json:"retriever"`
 	Tools struct {
 		Count int             `json:"count,omitempty"`
diff --git a/internal/ai/runtime/internal/impl/retrievers/knowledge_retriever.go b/internal/ai/runtime/internal/impl/retrievers/knowledge_retriever.go
index 901c70a..6e50e75 100644
--- a/internal/ai/runtime/internal/impl/retrievers/knowledge_retriever.go
+++ b/internal/ai/runtime/internal/impl/retrievers/knowledge_retriever.go
@@ -7,10 +7,16 @@ import (
 	"cs-agent/internal/ai/rag"
 	"cs-agent/internal/ai/runtime/internal/impl/callbacks"
 	"cs-agent/internal/models"
+	"cs-agent/internal/pkg/enums"
 	"cs-agent/internal/pkg/utils"
+	"cs-agent/internal/repositories"
+
+	"github.com/mlogclub/simple/sqls"
 )
 
 const defaultRuntimeKnowledgeContextTokens = 4000
+const defaultRuntimeKnowledgeTopK = 8
+const defaultRuntimeKnowledgeScoreThreshold = 0.3
 
 type KnowledgeRetriever struct {
 	AIAgent *models.AIAgent
@@ -23,6 +29,12 @@ type KnowledgeRetrieveOptions struct {
 	QueryPreview     string
 }
 
+type KnowledgeBaseRetrievePolicy struct {
+	KnowledgeBaseID int64
+	TopK            int
+	ScoreThreshold  float64
+}
+
 type KnowledgeRetrieveResult struct {
 	KnowledgeBaseIDs []int64
 	Query            string
@@ -33,6 +45,7 @@ type KnowledgeRetrieveResult struct {
 	Trace            *rag.RetrieveTrace
 	TraceItems       []callbacks.RetrieverTraceItem
 	TraceSummary     callbacks.RetrieverTraceSummary
+	Policies         []KnowledgeBaseRetrievePolicy
 }
 
 func NewKnowledgeRetriever(aiAgent *models.AIAgent) *KnowledgeRetriever {
@@ -67,6 +80,7 @@ func (r *KnowledgeRetriever) RetrieveContext(ctx context.Context, query string)
 func (r *KnowledgeRetriever) RetrieveContextByOptions(ctx context.Context, opts KnowledgeRetrieveOptions, query string) (*KnowledgeRetrieveResult, error) {
 	query = strings.TrimSpace(query)
 	knowledgeBaseIDs := r.KnowledgeBaseIDs()
+	policies := r.resolvePolicies(knowledgeBaseIDs, opts)
 	contextMaxTokens := opts.ContextMaxTokens
 	if contextMaxTokens <= 0 {
 		contextMaxTokens = defaultRuntimeKnowledgeContextTokens
@@ -84,6 +98,7 @@ func (r *KnowledgeRetriever) RetrieveContextByOptions(ctx context.Context, opts
 			ScoreThreshold:   opts.ScoreThreshold,
 			QueryPreview:     queryPreview,
 		},
+		Policies: append([]KnowledgeBaseRetrievePolicy(nil), policies...),
 	}
 	if query == "" || len(knowledgeBaseIDs) == 0 {
 		return ret, nil
@@ -97,10 +112,59 @@ func (r *KnowledgeRetriever) RetrieveContextByOptions(ctx context.Context, opts
 	ret.ContextResults = rag.Retrieve.SelectContextResults(results, contextMaxTokens)
 	ret.ContextText = strings.TrimSpace(rag.Retrieve.BuildContext(ctx, results, contextMaxTokens))
 	ret.TraceItems = buildRetrieverTraceItems(queryPreview, results, trace)
-	ret.TraceSummary = buildRetrieverTraceSummary(ret.Options, ret.ContextResults, results, trace)
+	ret.TraceSummary = buildRetrieverTraceSummary(ret.Options, ret.Policies, ret.ContextResults, results, trace)
 	return ret, nil
 }
 
+func (r *KnowledgeRetriever) resolvePolicies(knowledgeBaseIDs []int64, opts KnowledgeRetrieveOptions) []KnowledgeBaseRetrievePolicy {
+	if len(knowledgeBaseIDs) == 0 {
+		return nil
+	}
+	knowledgeBases := loadRuntimeKnowledgeBases(knowledgeBaseIDs)
+	ret := make([]KnowledgeBaseRetrievePolicy, 0, len(knowledgeBaseIDs))
+	for _, knowledgeBaseID := range knowledgeBaseIDs {
+		policy := KnowledgeBaseRetrievePolicy{
+			KnowledgeBaseID: knowledgeBaseID,
+			TopK:            defaultRuntimeKnowledgeTopK,
+			ScoreThreshold:  defaultRuntimeKnowledgeScoreThreshold,
+		}
+		if knowledgeBase, ok := knowledgeBases[knowledgeBaseID]; ok {
+			if knowledgeBase.DefaultTopK > 0 {
+				policy.TopK = knowledgeBase.DefaultTopK
+			}
+			if knowledgeBase.DefaultScoreThreshold > 0 {
+				policy.ScoreThreshold = knowledgeBase.DefaultScoreThreshold
+			}
+		}
+		if opts.TopK > 0 {
+			policy.TopK = opts.TopK
+		}
+		if opts.ScoreThreshold > 0 {
+			policy.ScoreThreshold = opts.ScoreThreshold
+		}
+		ret = append(ret, policy)
+	}
+	return ret
+}
+
+func loadRuntimeKnowledgeBases(ids []int64) map[int64]models.KnowledgeBase {
+	if len(ids) == 0 {
+		return nil
+	}
+	items := repositories.KnowledgeBaseRepository.Find(sqls.DB(), sqls.NewCnd().In("id", ids))
+	if len(items) == 0 {
+		return nil
+	}
+	ret := make(map[int64]models.KnowledgeBase, len(items))
+	for _, item := range items {
+		if item.Status != enums.StatusOk {
+			continue
+		}
+		ret[item.ID] = item
+	}
+	return ret
+}
+
 func buildRetrieverTraceItems(queryPreview string, results []rag.RetrieveResult, trace *rag.RetrieveTrace) []callbacks.RetrieverTraceItem {
 	if len(results) == 0 {
 		return nil
@@ -123,13 +187,20 @@ func buildRetrieverTraceItems(queryPreview string, results []rag.RetrieveResult,
 	return ret
 }
 
-func buildRetrieverTraceSummary(opts KnowledgeRetrieveOptions, contextResults []rag.RetrieveResult, results []rag.RetrieveResult, trace *rag.RetrieveTrace) callbacks.RetrieverTraceSummary {
+func buildRetrieverTraceSummary(opts KnowledgeRetrieveOptions, policies []KnowledgeBaseRetrievePolicy, contextResults []rag.RetrieveResult, results []rag.RetrieveResult, trace *rag.RetrieveTrace) callbacks.RetrieverTraceSummary {
 	ret := callbacks.RetrieverTraceSummary{
 		TopK:             opts.TopK,
 		ScoreThreshold:   opts.ScoreThreshold,
 		ContextMaxTokens: opts.ContextMaxTokens,
 		HitCount:         len(results),
 		ContextCount:     len(contextResults),
+		Policies:         buildRetrieverPolicyTraceItems(policies),
+	}
+	if ret.TopK <= 0 && len(policies) == 1 {
+		ret.TopK = policies[0].TopK
+	}
+	if ret.ScoreThreshold <= 0 && len(policies) == 1 {
+		ret.ScoreThreshold = policies[0].ScoreThreshold
 	}
 	if trace != nil {
 		ret.EmbeddingMs = trace.EmbeddingMs
@@ -138,3 +209,18 @@ func buildRetrieverTraceSummary(opts KnowledgeRetrieveOptions, contextResults []
 	}
 	return ret
 }
+
+func buildRetrieverPolicyTraceItems(policies []KnowledgeBaseRetrievePolicy) []callbacks.RetrieverPolicyTraceItem {
+	if len(policies) == 0 {
+		return nil
+	}
+	ret := make([]callbacks.RetrieverPolicyTraceItem, 0, len(policies))
+	for _, item := range policies {
+		ret = append(ret, callbacks.RetrieverPolicyTraceItem{
+			KnowledgeBaseID: item.KnowledgeBaseID,
+			TopK:            item.TopK,
+			ScoreThreshold:  item.ScoreThreshold,
+		})
+	}
+	return ret
+}