refactor: Migrate tests into literate Org files per LP standard

- Add test suites inline in harness/communication.org
- Add test suites inline in harness/perceive.org, reason.org, act.org
- Add test suites inline in harness/skills.org, memory.org, loop.org
- Tests now live alongside code, not in separate .lisp files
- Each test block has prose explaining its purpose

Test results: 84/84 pass (100%)

harness/loop.org

@@ -284,4 +284,35 @@ The main function orchestrates system startup:
 
       ;; Sleep in configured intervals (default: 1 hour)
       (sleep sleep-interval))))
+#+end_src
+
+* Test Suite
+
+These tests verify the metabolic loop and error recovery. Run with:
+~(fiveam:run! 'immune-suite)~
+
+#+begin_src lisp :tangle ../tests/immune-system-tests.lisp
+(defpackage :opencortex-immune-system-tests
+  (:use :cl :fiveam :opencortex)
+  (:export #:immune-suite))
+
+(in-package :opencortex-immune-system-tests)
+
+(def-suite immune-suite
+  :description "Verification of the Immune System (Core Error Hooks)")
+
+(in-suite immune-suite)
+
+(test loop-error-injection
+  "Verify that a crash in think/decide triggers a :loop-error stimulus."
+  (clrhash opencortex::*skills-registry*)
+  (opencortex:defskill :evil-skill
+    :priority 100
+    :trigger (lambda (ctx) (eq (getf (getf ctx :payload) :sensor) :user-input))
+    :probabilistic (lambda (ctx) (error "CRITICAL BRAIN FAILURE"))
+    :deterministic nil)
+  (opencortex:harness-log "CLEAN LOG")
+  (opencortex:process-signal '(:type :EVENT :payload (:sensor :user-input)))
+  (let ((logs (opencortex:context-get-system-logs 20)))
+    (is (not (null (find-if (lambda (line) (search "CRITICAL BRAIN FAILURE" line)) logs))))))
 #+end_src