diff --git a/opencortex.asd b/opencortex.asd
index a54e2f9..3ee340c 100644
--- a/opencortex.asd
+++ b/opencortex.asd
@@ -28,7 +28,7 @@
                (:file "tests/boot-sequence-tests")
                (:file "tests/memory-tests")
                (:file "tests/immune-system-tests")
-               (:file "tests/emacs-edit-tests"))
+               (:file "tests/lisp-utils-tests"))
   :perform (test-op (o s) 
               (uiop:symbol-call :fiveam :run! (uiop:find-symbol* :communication-protocol-suite :opencortex-tests))
               (uiop:symbol-call :fiveam :run! (uiop:find-symbol* :pipeline-suite :opencortex-pipeline-tests))
@@ -36,7 +36,8 @@
               (uiop:symbol-call :fiveam :run! (uiop:find-symbol* :boot-suite :opencortex-boot-tests))
               (uiop:symbol-call :fiveam :run! (uiop:find-symbol* :memory-suite :opencortex-memory-tests))
               (uiop:symbol-call :fiveam :run! (uiop:find-symbol* :immune-suite :opencortex-immune-system-tests))
-              (uiop:symbol-call :fiveam :run! (uiop:find-symbol* :emacs-edit-suite :opencortex-emacs-edit-tests))))
+              (uiop:symbol-call :fiveam :run! (uiop:find-symbol* :emacs-edit-suite :opencortex-emacs-edit-tests))
+              (uiop:symbol-call :fiveam :run! (uiop:find-symbol* :lisp-utils-suite :opencortex-lisp-utils-tests)))))
 
 (defsystem :opencortex/tui
   :depends-on (:opencortex :croatoan :usocket :bordeaux-threads)
diff --git a/tests/lisp-utils-tests.lisp b/tests/lisp-utils-tests.lisp
new file mode 100644
index 0000000..e70d69f
--- /dev/null
+++ b/tests/lisp-utils-tests.lisp
@@ -0,0 +1,107 @@
+(defpackage :opencortex-lisp-utils-tests
+  (:use :cl :fiveam :opencortex)
+  (:export #:lisp-utils-suite))
+
+(in-package :opencortex-lisp-utils-tests)
+
+(def-suite lisp-utils-suite
+  :description "Tests for the Lisp Utils skill - utilities, repair, and validation.")
+
+(in-suite lisp-utils-suite)
+
+;; Character utilities
+(test count-char-balanced
+  (is (= (count-char #\( "(+ 1 2)") 1))
+  (is (= (count-char #\) "(+ 1 2)") 1)))
+
+(test count-char-unbalanced
+  (is (= (count-char #\( "(+ 1 2") 1))
+  (is (= (count-char #\) "(+ 1 2") 0)))
+
+(test count-char-empty
+  (is (= (count-char #\( "") 0)))
+
+;; Deterministic repair
+(test deterministic-repair-balanced
+  (is (string= (deterministic-repair "(+ 1 2)") "(+ 1 2)")))
+
+(test deterministic-repair-unbalanced-open
+  (is (string= (deterministic-repair "(+ 1 2") "(+ 1 2)")))
+
+(test deterministic-repair-unbalanced-close
+  (is (string= (deterministic-repair "(+ 1 2))") "(+ 1 2)))")) ;; Left as-is (can't fix)
+
+(test deterministic-repair-empty
+  (is (string= (deterministic-repair "") "")))
+
+;; ID generation
+(test id-generation
+  (let ((id1 (emacs-edit-generate-id))
+        (id2 (emacs-edit-generate-id)))
+    (is (plusp (length id1)))
+    (is (not (string= id1 id2))) ;; Likely unique
+    (is (= 8 (length id1)))))
+
+(test id-format
+  (let ((formatted (emacs-edit-id-format "abc12345")))
+    (is (search "id:" formatted))))
+
+;; Structural check (from lisp-utils)
+(test structural-valid
+  (multiple-value-bind (ok reason line col)
+      (opencortex::lisp-utils-check-structural "(+ 1 2)")
+    (is ok)))
+
+(test structural-unbalanced
+  (multiple-value-bind (ok reason line col)
+      (opencortex::lisp-utils-check-structural "(+ 1 2")
+    (is (not ok))
+    (is (search "Unbalanced" reason))))
+
+(test structural-mismatched
+  (multiple-value-bind (ok reason line col)
+      (opencortex::lisp-utils-check-structural "(let [x 1])")
+    (is (not ok))
+    (is (search "Mismatched" reason))))
+
+;; Syntactic check
+(test syntactic-valid
+  (multiple-value-bind (ok reason line col)
+      (opencortex::lisp-utils-check-syntactic "(+ 1 2)")
+    (is ok)))
+
+(test syntactic-invalid
+  (multiple-value-bind (ok reason line col)
+      (opencortex::lisp-utils-check-syntactic "(1+ 2 #\"")
+    (is (not ok))))
+
+;; Semantic check
+(test semantic-whitelist-safe
+  (multiple-value-bind (ok reason line col)
+      (opencortex::lisp-utils-check-semantic "(+ 1 2)")
+    (is ok)))
+
+(test semantic-blocked-eval
+  (multiple-value-bind (ok reason line col)
+      (opencortex::lisp-utils-check-semantic "(eval '(+ 1 2))")
+    (is (not ok))))
+
+(test semantic-blocked-delete
+  (multiple-value-bind (ok reason line col)
+      (opencortex::lisp-utils-check-semantic "(delete-file \"x.txt\")")
+    (is (not ok))))
+
+;; Unified validation
+(test unified-success
+  (let ((result (opencortex::lisp-utils-validate "(+ 1 2)" :strict t)))
+    (is (eq (getf result :status) :success))))
+
+(test unified-structural-fail
+  (let ((result (opencortex::lisp-utils-validate "(+ 1 2" :strict nil)))
+    (is (eq (getf result :status) :error))
+    (is (eq (getf result :failed) :structural))))
+
+(test unified-semantic-fail
+  (let ((result (opencortex::lisp-utils-validate "(delete-file \"x.txt\")" :strict t)))
+    (is (eq (getf result :status) :error))
+    (is (eq (getf result :failed) :semantic))))
\ No newline at end of file