diff --git a/features/lsp_discovery_dos_protection.feature b/features/lsp_discovery_dos_protection.feature
index 413b07276..61387e892 100644
--- a/features/lsp_discovery_dos_protection.feature
+++ b/features/lsp_discovery_dos_protection.feature
@@ -1,4 +1,6 @@
 Feature: LSP language discovery DoS protection
+  @tdd_issue
+  @tdd_issue_7161
   Prevent resource exhaustion attacks via directory traversal limits.
   Issue #7161: Resource exhaustion DoS in LSP language discovery.
 
diff --git a/src/cleveragents/lsp/discovery.py b/src/cleveragents/lsp/discovery.py
index ef746666f..7533ad718 100644
--- a/src/cleveragents/lsp/discovery.py
+++ b/src/cleveragents/lsp/discovery.py
@@ -257,7 +257,7 @@ class LanguageDiscovery:
                     break
 
                 # Calculate current depth
-                depth = root[len(directory):].count(os.sep)
+                depth = root[len(directory) :].count(os.sep)
                 if depth > max_depth:
                     logger.warning(
                         "lsp.discovery.max_depth_exceeded",