diff --git a/.kimera.yml b/.kimera.yml
index 52f39c9..c31b062 100644
--- a/.kimera.yml
+++ b/.kimera.yml
@@ -8,3 +8,10 @@ jobs: 4
 max_survivors: 0
 max_errors: 0
 fail_on_no_coverage: true
+max_ignored: 1
+ignore:
+- file: lib/hashira/coupling/echo.rb
+  line: 18
+  label: condition => false
+  reason: RollCall keeps only word sets at least 3 files share (MIN_WORDS = MIN_FILES = 3), so a file with no words never
+    joins a roll; the filter only keeps such files out of the pairwise scan (about 30% of coupling time on a 2,600-file app)
diff --git a/lib/hashira/complexity/cognitive_score.rb b/lib/hashira/complexity/cognitive_score.rb
index e136e0e..4ef05eb 100644
--- a/lib/hashira/complexity/cognitive_score.rb
+++ b/lib/hashira/complexity/cognitive_score.rb
@@ -26,10 +26,7 @@ def calls
     @_calls
   end
 
-  def nesting
-    walked
-    @_nesting
-  end
+  def nesting = @_nesting
 
   def total = increments.sum(&:cost)