refactor: Migrate skill tests to Org files - delete redundant .lisp

Added inline tests:
- org-skill-lisp-utils.org: lisp-validator tests
- org-skill-tool-permissions.org: tool-permissions tests

Deleted duplicates:
- tests/lisp-validator-tests.lisp
- tests/tool-permissions-tests.lisp

All tests pass: 84/84 (100%)

skills/org-skill-tool-permissions.org

@@ -115,4 +115,46 @@ Tool permissions and embedding generation via multiple providers.
   :deterministic (lambda (a c)
     (let ((tool (getf (getf a :payload) :tool)))
       (when tool (check-tool-permission-gate tool c)))))
+#+end_src
+
+* Test Suite
+
+These tests verify tool permissions. Run with:
+~(fiveam:run! 'tool-permissions-suite)~
+
+#+begin_src lisp :tangle ../tests/tool-permissions-tests.lisp
+(defpackage :opencortex-tool-permissions-tests
+  (:use :cl :fiveam :opencortex)
+  (:export #:tool-permissions-suite))
+
+(in-package :opencortex-tool-permissions-tests)
+
+(def-suite tool-permissions-suite
+  :description "Tests for Tool Permissions skill")
+
+(in-suite tool-permissions-suite)
+
+(test default-permission-is-allow
+  "Verify default permission is :allow."
+  (is (eq (get-tool-permission "unknown-tool") :allow)))
+
+(test set-and-get-permission
+  "Verify setting and getting permissions."
+  (set-tool-permission "test-tool-abc" :deny)
+  (is (eq (get-tool-permission "test-tool-abc") :deny)))
+
+(test permission-gate-allow
+  "Verify :allow tier passes through."
+  (set-tool-permission "gate-allow-tool" :allow)
+  (is (eq (check-tool-permission-gate "gate-allow-tool" nil) :allow)))
+
+(test permission-gate-deny
+  "Verify :deny tier blocks."
+  (set-tool-permission "gate-deny-tool" :deny)
+  (is (eq (check-tool-permission-gate "gate-deny-tool" nil) :deny)))
+
+(test permission-gate-ask
+  "Verify :ask tier returns ask list."
+  (set-tool-permission "gate-ask-tool" :ask)
+  (is (listp (check-tool-permission-gate "gate-ask-tool" nil))))
 #+end_src