diff --git a/internal/knowledge/store.go b/internal/knowledge/store.go
index 5c762c8..0c186a1 100644
--- a/internal/knowledge/store.go
+++ b/internal/knowledge/store.go
@@ -17,6 +17,7 @@ import (
 	"time"
 	"unicode"
 
+	"github.com/example/glpi-ai-agent/internal/brainactivity"
 	"github.com/example/glpi-ai-agent/internal/model"
 )
 
@@ -1073,6 +1074,7 @@ func safeID(v string) bool {
 // are scored separately. Missing metadata does not lower a document's score:
 // the weights of available components are normalized dynamically.
 func (s *Store) Search(ctx context.Context, text string, topK int, categorySets ...[]model.Category) ([]model.KnowledgeHit, error) {
+	startedAt := time.Now()
 	if s == nil {
 		return nil, fmt.Errorf("knowledge store is not initialized")
 	}
@@ -1191,6 +1193,11 @@ func (s *Store) Search(ctx context.Context, text string, topK int, categorySets
 	if topK > 0 && len(hits) > topK {
 		hits = hits[:topK]
 	}
+	activityHits := make([]brainactivity.Hit, 0, len(hits))
+	for _, hit := range hits {
+		activityHits = append(activityHits, brainactivity.Hit{ID: hit.Doc.ID, Score: hit.Score})
+	}
+	brainactivity.EmitSearch("agent", text, activityHits, time.Since(startedAt))
 	return hits, nil
 }