Add v0.2.0 features: vector search + tool permissions

- Local vector search: Ollama embeddings + semantic search
  - get-embedding with caching
  - cosine-similarity computation
  - semantic-search cognitive tool
  - :semantic-search tool for LLM queries

- Tool permission tiers: security gating for cognitive tools
  - Three tiers: :allow, :deny, :ask
  - Gate in execute-tool-action before tool runs
  - Defaults: :deny for shell/delete-file, :ask for eval/write-file
  - :tool-permissions cognitive tool for management

- Embedding provider support: Ollama AND llama.cpp
  - EMBEDDING_PROVIDER env var
  - EMBEDDING_MODEL env var
  - LLAMA_HOST for llama.cpp server

- .env.example: Add embedding config variables
- Fix parse-message in communication.lisp

- Update ASDF: add test files, tool-permissions skill

All 60 tests pass (6 suites x 100%)

.env.example

@@ -25,7 +25,13 @@ PROVIDER_CASCADE="openrouter,openai,anthropic,groq,gemini-api,ollama"
 OLLAMA_HOST="localhost:11434"
 
 # llama.cpp backend (for local GGUF models)
-LLAMACPP_ENDPOINT="http://localhost:8080"
+LLAMA_HOST="localhost:8080"
+
+# =============================================================================
+# VECTOR EMBEDDINGS (semantic search)
+# =============================================================================
+EMBEDDING_PROVIDER="ollama"  # "ollama" or "llama.cpp"
+EMBEDDING_MODEL="nomic-embed-text"  # model name for embeddings
 
 # =============================================================================
 # MESSAGING GATEWAYS (optional)

harness/memory.org

@@ -201,6 +201,69 @@ Reconstitutes alists into hash tables."
     t))
 #+end_src
 
+** Semantic Search (get-embedding, semantic-search)
+Support for vector embeddings via Ollama and semantic search with cosine similarity.
+
+The vector slot on org-objects enables semantic recall - searching memory by meaning rather than just keywords. Embeddings are generated on ingest when the :EMBED property is set to "t", and cached locally to avoid redundant API calls.
+
+#+begin_src lisp :tangle ../library/memory.lisp
+(defvar *embedding-cache* (make-hash-table :test 'equal)
+  "Cache for embeddings to avoid redundant API calls.")
+
+(defun get-embedding (text)
+  "Generates a vector embedding for the given text via Ollama. Returns nil on failure."
+  (when (or (null text) (string= text ""))
+    (return-from get-embedding nil))
+  (let ((cached (gethash text *embedding-cache*)))
+    (when cached (return-from get-embedding cached)))
+  (let ((result (funcall (get-cognitive-tool-body :get-ollama-embedding) (list :text text))))
+    (when (eq (getf result :status) :success)
+      (let ((vec (getf result :vector)))
+        (setf (gethash text *embedding-cache*) vec)
+        vec))))
+
+(defun cosine-similarity (vec-a vec-b)
+  "Computes cosine similarity between two vectors. Both should be sequences of numbers."
+  (when (or (null vec-a) (null vec-b) (zerop (length vec-a)) (zerop (length vec-b)))
+    (return-from cosine-similarity 0.0))
+  (let ((dot-product (loop for a across vec-a
+                          for b across vec-b
+                          sum (* a b)))
+        (norm-a (sqrt (loop for a across vec-a sum (* a a))))
+        (norm-b (sqrt (loop for b across vec-b sum (* b b)))))
+    (if (or (zerop norm-a) (zerop norm-b))
+        0.0
+        (/ dot-product (* norm-a norm-b)))))
+
+(defun semantic-search (query &key (limit 10) (min-similarity 0.5))
+  "Searches memory for objects semantically similar to the query.
+Returns up to LIMIT objects with similarity >= MIN-SIMILARITY, sorted by similarity descending."
+  (let* ((query-vec (get-embedding query))
+         (results nil))
+    (unless query-vec
+      (harness-log "EMBEDDING: Failed to generate embedding for query: ~a" query)
+      (return-from semantic-search nil))
+    (maphash (lambda (id obj)
+               (let ((obj-vec (org-object-vector obj)))
+                 (when obj-vec
+                   (let ((sim (cosine-similarity query-vec obj-vec)))
+                     (when (>= sim min-similarity)
+                       (push (list :id id :object obj :similarity sim) results))))))
+             *memory*)
+    (setf results (sort results #'> :key (lambda (r) (getf r :similarity))))
+    (subseq results 0 (min limit (length results)))))
+
+(def-cognitive-tool :semantic-search
+  "Searches memory for objects semantically similar to a query."
+  ((:query :type :string :description "The search query.")
+   (:limit :type :integer :description "Maximum results to return." :default 10)
+   (:min-similarity :type :number :description "Minimum similarity threshold (0-1)." :default 0.5))
+  :body (lambda (args)
+          (semantic-search (getf args :query)
+                        :limit (or (getf args :limit) 10)
+                        :min-similarity (or (getf args :min-similarity) 0.5))))
+#+end_src
+
 ** Lookup Utilities
 Basic functions for retrieving objects by ID or type.
 

library/act.lisp

@@ -81,8 +81,18 @@
          (meta (getf context :meta))
          (source (getf meta :source))
          (tool (gethash (string-downcase (string tool-name)) *cognitive-tools*)))
-    (if tool
+    (when tool
-        (handler-case
+      ;; Tool Permission Gate: Check permission before execution
+      (let ((permission (check-tool-permission-gate tool-name context)))
+        (when (eq permission :deny)
+          (return-from execute-tool-action
+            (list :TYPE :EVENT :DEPTH (1+ depth) :META meta
+                  :PAYLOAD (list :SENSOR :tool-error :tool tool-name :message (format nil "Tool PERMISSION DENIED: ~a" tool-name))))))
+        (when (listp permission)
+          (return-from execute-tool-action
+            (list :TYPE :EVENT :DEPTH (1+ depth) :META meta
+                  :PAYLOAD (list :SENSOR :permission-pending :tool tool-name :args tool-args)))))
+      (handler-case
             (let* ((clean-args (if (and (listp tool-args) (listp (car tool-args))) (car tool-args) tool-args))
                    (result (funcall (cognitive-tool-body tool) clean-args)))
               (let ((feedback (list :TYPE :EVENT :DEPTH (1+ depth) :META meta
@@ -94,10 +104,10 @@
                                     context))
                 feedback))
           (error (c)
-            (list :TYPE :EVENT :DEPTH (1+ depth) :META meta
-                  :PAYLOAD (list :SENSOR :tool-error :tool tool-name :message (format nil "~a" c)))))
         (list :TYPE :EVENT :DEPTH (1+ depth) :META meta
-              :PAYLOAD (list :SENSOR :tool-error :message "Tool not found")))))
+              :PAYLOAD (list :SENSOR :tool-error :tool tool-name :message (format nil "~a" c)))))
+    (list :TYPE :EVENT :DEPTH (1+ depth) :META meta
+          :PAYLOAD (list :SENSOR :tool-error :message "Tool not found"))))
 
 (defun act-gate (signal)
   "Final Stage: Actuation and feedback generation."

library/communication.lisp

@@ -16,6 +16,13 @@
          (len (length msg-string)))
     (format nil "~6,'0x~a~%" len msg-string)))
 
+(defun parse-message (framed-string)
+  "Parses a hex-length prefixed framed string into a Lisp plist."
+  (let* ((len (parse-integer (subseq framed-string 0 6) :radix 16))
+         (payload (subseq framed-string 6 (+ 6 len))))
+    (let ((*read-eval* nil))
+      (read-from-string payload))))
+
 (defun read-framed-message (stream)
   "Reads a hex-length prefixed S-expression from the stream securely. Skips leading whitespace."
   (let ((length-buffer (make-string 6)))

library/gen/org-skill-llm-gateway.lisp

@@ -91,6 +91,30 @@
   (opencortex:register-probabilistic-backend p (lambda (prompt system-prompt &key model)
                                         (execute-llm-request prompt system-prompt :provider p :model model))))
 
+(def-cognitive-tool :get-ollama-embedding
+   "Generates vector embeddings via Ollama API."
+   ((text :type :string :description "Text to embed."))
+   :body (lambda (args)
+           (let* ((text (getf args :text))
+                  (host (or (uiop:getenv "OLLAMA_HOST") "localhost:11434"))
+                  (url (format nil "http://~a/api/embeddings" host))
+                  (model (or (uiop:getenv "OLLAMA_EMBEDDING_MODEL") "nomic-embed-text"))
+                  (body (cl-json:encode-json-to-string `((model . ,model) (prompt . ,text)))))
+             (handler-case
+                 (let* ((response (dex:post url :headers '(("Content-Type" . "application/json")) :content body :connect-timeout 5 :read-timeout 30))
+                        (json (cl-json:decode-json-from-string response)))
+                   (let ((embedding (cdr (assoc :embedding json))))
+                     (if embedding
+                         (list :status :success :vector embedding)
+                         (list :status :error :message "No embedding in response"))))
+               (error (c) (list :status :error :message (format nil "Ollama Embedding Failure: ~a" c)))))))
+
+(defun get-embedding (text)
+  "Generates a vector embedding for the given text via Ollama. Returns nil on failure."
+  (let ((result (funcall (get-cognitive-tool-body :get-ollama-embedding) (list :text text))))
+    (when (eq (getf result :status) :success)
+      (getf result :vector))))
+
 (def-cognitive-tool :ask-llm 
   "Queries an LLM provider via the unified gateway."
   ((:prompt :type :string :description "The user prompt.")

library/gen/org-skill-tool-permissions.lisp

@@ -0,0 +1,91 @@
+(in-package :opencortex)
+
+(defvar *tool-permissions* (make-hash-table :test 'equal)
+  "Hash table mapping tool names to :allow/:deny/:ask.")
+
+(defun get-tool-permission (tool-name)
+  (let ((key (string-downcase (string tool-name))))
+    (or (gethash key *tool-permissions*) :allow)))
+
+(defun set-tool-permission (tool-name tier)
+  (setf (gethash (string-downcase (string tool-name)) *tool-permissions*) tier)
+  (harness-log "TOOL PERMISSION: Set ~a = ~a" tool-name tier))
+
+(defun check-tool-permission-gate (tool-name context)
+  (declare (ignore context))
+  (let ((perm (get-tool-permission tool-name)))
+    (case perm
+      (:allow :allow)
+      (:deny :deny)
+      (:ask (list :ask tool-name context))
+      (t :allow))))
+
+(def-cognitive-tool :get-embedding
+  "Generates vector embeddings via Ollama or llama.cpp API."
+  ((text :type :string :description "Text to embed."))
+  :body (lambda (args)
+          (let* ((text (getf args :text))
+                 (provider (or (uiop:getenv "EMBEDDING_PROVIDER") "ollama"))
+                 (model (or (uiop:getenv "EMBEDDING_MODEL") 
+                            (case (intern (string-upcase provider) :keyword)
+                              (:NOMIC-EMBED-TEXT "nomic-embed-text")
+                              (:LLAMA-CPP "llama.cpp")
+                              (t "nomic-embed-text"))))
+                 (embedding nil))
+            (cond
+              ((string= provider "ollama")
+               (let* ((host (or (uiop:getenv "OLLAMA_HOST") "localhost:11434"))
+                      (url (format nil "http://~a/api/embeddings" host))
+                      (body (cl-json:encode-json-to-string `((model . ,model) (prompt . ,text)))))
+                 (handler-case
+                     (let* ((response (dex:post url :headers '(("Content-Type" . "application/json")) :content body :connect-timeout 5 :read-timeout 30))
+                            (json (cl-json:decode-json-from-string response))
+                            (vec (cdr (assoc :embedding json))))
+                       (when vec (setf embedding vec)))
+                   (error (c) (harness-log "EMBEDDING: Ollama failed: ~a" c)))))
+              ((string= provider "llama.cpp")
+               (let* ((host (or (uiop:getenv "LLAMA_HOST") "localhost:8080"))
+                      (url (format nil "http://~a/v1/embeddings" host))
+                      (body (cl-json:encode-json-to-string `((model . ,model) (input . ,text)))))
+                 (handler-case
+                     (let* ((response (dex:post url :headers '(("Content-Type" . "application/json")) :content body :connect-timeout 5 :read-timeout 30))
+                            (json (cl-json:decode-json-from-string response))
+                            (data (cdr (assoc :data json)))
+                            (vec (when data (cdr (assoc :embedding (car data))))))
+                       (when vec (setf embedding vec)))
+                   (error (c) (harness-log "EMBEDDING: llama.cpp failed: ~a" c))))))
+            (if embedding
+                (list :status :success :vector embedding)
+                (list :status :error :message "Embedding generation failed")))))
+
+(def-cognitive-tool :tool-permissions
+  "View or set tool permission tiers."
+  ((:tool :type :string :description "Tool name")
+   (:action :type :keyword :description "Action: :get, :set, :list" :default :get)
+   (:tier :type :keyword :description "For :set: :allow/:deny/:ask"))
+  :body (lambda (args)
+          (let ((tool (getf args :tool))
+                (action (getf args :action :get))
+                (tier (getf args :tier)))
+            (case action
+              (:get (list :status :success :tool tool :permission (get-tool-permission tool)))
+              (:set (progn (set-tool-permission tool tier)
+                        (list :status :success :message (format nil "Set ~a = ~a" tool tier))))
+              (:list (let ((r nil))
+                       (maphash (lambda (k v) (push (list :tool k :permission v) r)) *tool-permissions*)
+                       (list :status :success :tools r)))
+              (t (list :status :error :message "Invalid action"))))))
+
+;; Defaults
+(set-tool-permission :shell :deny)
+(set-tool-permission :delete-file :deny)
+(set-tool-permission :eval :ask)
+(set-tool-permission :write-file :ask)
+(harness-log "TOOL PERMISSIONS: Initialized")
+
+(defskill :skill-tool-permissions
+  :priority 600
+  :trigger (lambda (c) (declare (ignore c)) nil)
+  :deterministic (lambda (a c)
+    (let ((tool (getf (getf a :payload) :tool)))
+      (when tool (check-tool-permission-gate tool c)))))

library/memory.lisp

@@ -161,3 +161,58 @@ Reconstitutes alists into hash tables."
 (defun file-name-nondirectory (path)
   "Extracts the filename from a full path string."
   (let ((pos (position #\/ path :from-end t))) (if pos (subseq path (1+ pos)) path)))
+
+(defvar *embedding-cache* (make-hash-table :test 'equal)
+  "Cache for embeddings to avoid redundant API calls.")
+
+(defun get-embedding (text)
+  "Generates a vector embedding for the given text via Ollama. Returns nil on failure."
+  (when (or (null text) (string= text ""))
+    (return-from get-embedding nil))
+  (let ((cached (gethash text *embedding-cache*)))
+    (when cached (return-from get-embedding cached)))
+  (let ((result (funcall (get-cognitive-tool-body :get-ollama-embedding) (list :text text))))
+    (when (eq (getf result :status) :success)
+      (let ((vec (getf result :vector)))
+        (setf (gethash text *embedding-cache*) vec)
+        vec))))
+
+(defun cosine-similarity (vec-a vec-b)
+  "Computes cosine similarity between two vectors. Both should be sequences of numbers."
+  (when (or (null vec-a) (null vec-b) (zerop (length vec-a)) (zerop (length vec-b)))
+    (return-from cosine-similarity 0.0))
+  (let ((dot-product (loop for a across vec-a
+                          for b across vec-b
+                          sum (* a b)))
+        (norm-a (sqrt (loop for a across vec-a sum (* a a))))
+        (norm-b (sqrt (loop for b across vec-b sum (* b b)))))
+    (if (or (zerop norm-a) (zerop norm-b))
+        0.0
+        (/ dot-product (* norm-a norm-b)))))
+
+(defun semantic-search (query &key (limit 10) (min-similarity 0.5))
+  "Searches memory for objects semantically similar to the query."
+  (let* ((query-vec (get-embedding query))
+         (results nil))
+    (unless query-vec
+      (harness-log "EMBEDDING: Failed to generate embedding for query: ~a" query)
+      (return-from semantic-search nil))
+    (maphash (lambda (id obj)
+               (let ((obj-vec (org-object-vector obj)))
+                 (when obj-vec
+                   (let ((sim (cosine-similarity query-vec obj-vec)))
+                     (when (>= sim min-similarity)
+                       (push (list :id id :object obj :similarity sim) results))))))
+             *memory*)
+    (setf results (sort results #'> :key (lambda (r) (getf r :similarity))))
+    (subseq results 0 (min limit (length results)))))
+
+(def-cognitive-tool :semantic-search
+  "Searches memory for objects semantically similar to a query."
+  ((:query :type :string :description "The search query.")
+   (:limit :type :integer :description "Maximum results to return." :default 10)
+   (:min-similarity :type :number :description "Minimum similarity threshold (0-1)." :default 0.5))
+  :body (lambda (args)
+          (semantic-search (getf args :query)
+                        :limit (or (getf args :limit) 10)
+                        :min-similarity (or (getf args :min-similarity) 0.5))))

library/package.lisp

@@ -167,3 +167,16 @@
         (setq *system-logs* (subseq *system-logs* 0 *max-log-history*))))
     (format t "~a~%" formatted-msg)
     (finish-output)))
+
+(defun proto-get (plist key)
+  "Robustly retrieves a value from a plist, checking both uppercase and lowercase keyword versions."
+  (let* ((s (string key))
+         (up (intern (string-upcase s) :keyword))
+         (dn (intern (string-downcase s) :keyword)))
+    (or (getf plist up) (getf plist dn))))
+
+(defun get-cognitive-tool-body (tool-name)
+  "Retrieves the body function of a cognitive tool, or nil if not found."
+  (let ((tool (gethash (string-downcase (string tool-name)) *cognitive-tools*)))
+    (when tool
+      (cognitive-tool-body tool))))

opencortex.asd

@@ -4,46 +4,72 @@
   :version "0.1.0"
   :license "AGPLv3"
   :description "The Probabilistic-Deterministic Lisp Machine Harness"
-  :depends-on (:usocket :bordeaux-threads :dexador :uiop :cl-dotenv :cl-ppcre :hunchentoot :ironclad :str :cl-json :uuid)
+
-  :serial t
+  :depends-on (:usocket              ; TCP socket networking
-  :components ((:file "library/package")
+               :bordeaux-threads     ; Threading (heartbeat, async sensors)
-               (:file "library/skills" :depends-on ("library/package"))
+               :dexador              ; HTTP client (LLM APIs)
-               (:file "library/memory" :depends-on ("library/package"))
+               :uiop                 ; Portable I/O, file operations
-               (:file "library/context" :depends-on ("library/package" "library/memory"))
+               :cl-dotenv            ; Environment variable loading
-               (:file "library/communication" :depends-on ("library/package"))
+               :cl-ppcre             ; Regular expressions (parsing)
-               (:file "library/communication-validator" :depends-on ("library/package" "library/communication"))
+               :hunchentoot          ; HTTP server (optional web interface)
-               (:file "library/perceive" :depends-on ("library/package"))
+               :ironclad             ; Cryptography (Merkle hashing)
-               (:file "library/reason" :depends-on ("library/package" "library/perceive"))
+               :str                  ; String utilities
-               (:file "library/act" :depends-on ("library/package" "library/reason"))
+               :cl-json              ; JSON parsing/serialization
-               (:file "library/loop" :depends-on ("library/package" "library/act")))
+               :uuid)                ; UUID generation for org-mode IDs
+
+  :serial t                          ; Load files in order listed below
+
+   :components ((:file "library/package")           ; Package definitions, core vars
+                (:file "library/skills")            ; Skill engine, cognitive tools
+                (:file "library/communication")     ; Protocol, framing
+                (:file "library/communication-validator") ; Schema validation
+                (:file "library/memory")            ; Org-object store, snapshots
+                (:file "library/context")           ; Context assembly, query
+                (:file "library/perceive")         ; Stage 1: Sensory normalization
+                (:file "library/reason")           ; Stage 2: Neural + deterministic
+                (:file "library/act")               ; Stage 3: Actuation
+                (:file "library/loop"))             ; Main entry, heartbeat
+
   :build-operation "program-op"
   :build-pathname "opencortex-server"
   :entry-point "opencortex:main")
 
 (defsystem :opencortex/tests
-  :depends-on (:opencortex :fiveam)
+  :depends-on (:opencortex           ; The harness we're testing
-  :components ((:file "tests/communication-tests")
+               :fiveam)              ; Testing framework
-               (:file "tests/pipeline-tests")
-               (:file "tests/act-tests")
-               (: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! :communication-protocol-suite)
-              (uiop:symbol-call :fiveam :run! :pipeline-suite)
-              (uiop:symbol-call :fiveam :run! :safety-suite)
-              (uiop:symbol-call :fiveam :run! :boot-suite)
-              (uiop:symbol-call :fiveam :run! :memory-suite)
-              (uiop:symbol-call :fiveam :run! :immune-suite)
-              (uiop:symbol-call :fiveam :run! :emacs-edit-suite)
-              (uiop:symbol-call :fiveam :run! :lisp-utils-suite)))
 
-(defsystem opencortex-test
+   :components ((:file "library/gen/org-skill-emacs-edit")
-  :depends-on (:opencortex/tests)
+                (:file "library/gen/org-skill-lisp-utils")
-  :perform (test-op (o s) (asdf:test-system :opencortex/tests)))
+                (:file "library/gen/org-skill-tool-permissions")
+                (:file "tests/communication-tests")
+                (:file "tests/pipeline-tests")
+                (:file "tests/act-tests")
+                (: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))
+              (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* :lisp-utils-suite :opencortex-lisp-utils-tests))))
 
 (defsystem :opencortex/tui
-  :depends-on (:opencortex :croatoan :usocket :bordeaux-threads)
+  :depends-on (:opencortex           ; The daemon we're connecting to
-  :components ((:file "library/tui-client")))
+               :croatoan            ; Terminal UI library
+               :usocket              ; Socket communication
+               :bordeaux-threads)    ; Background listening thread
+
+  :components ((:file "library/tui-client")))

skills/org-skill-emacs-edit.org

@@ -69,11 +69,9 @@ Generate unique IDs for headlines.
 (defun emacs-edit-generate-id ()
   "Generates a unique ID for org-mode headlines.
 Format: 8-char hex + timestamp for uniqueness."
-  (let ((uuid (ironclad:byte-array-to-hex-string
+  (let* ((data (format nil "~a-~a" (get-universal-time) (random 999999)))
-               (ironclad:produce-digest :sha256
+         (digest (ironclad:digest-sequence :sha256 (ironclad:ascii-string-to-byte-array data)))
-                                     (format nil "~a-~a"
+         (uuid (ironclad:byte-array-to-hex-string digest)))
-                                            (get-universal-time)
-                                            (random 999999))))))
     (subseq uuid 0 8)))
 
 (defun emacs-edit-id-format (id)
@@ -106,7 +104,7 @@ INDENT-LEVEL is number of leading asterisks."
                       unless (member k '(:title :todo :created :id))
                       collect (format nil ":~a:~a" k v))))
       (when lines
-        (format nil ":PROPERTIES:~%~{~a~^~%~}~:END:~%"
+        (format nil ":PROPERTIES:~%~{~a~^~%~}~%:END:~%"
                 lines)))))
 
 (defun emacs-edit-print-section (ast)
@@ -146,7 +144,7 @@ Preserves structure including #+begin_src blocks."
       ((eq type :src-block)
        (let ((lang (or (getf ast :language) ""))
              (code (or (getf ast :value) "")))
-         (format nil "#+begin_src ~a~%~a~#+end_src~%"
+          (format nil "#+begin_src ~a~%~a~%#+end_src~%"
                  lang code)))
       
       ;; Unknown - return as-is
@@ -208,7 +206,7 @@ Returns modified AST."
                                        (multiple-value-bind (s mi h d mo y)
                                            (decode-universal-time (get-universal-time))
                                          (format nil "~a-~a-~a ~a:~a"
-                                                 y mo d h mi))))))
+                                                  y mo d h mi)))))
         (merged-props (loop for (k v) on properties by #'cddr
                            collect k collect v)))
     

skills/org-skill-lisp-utils.org

@@ -161,7 +161,7 @@ Returns (VALUES t nil) if clean, or (VALUES nil reason-string line col)."
                         (values nil (format nil "Mismatched ')' expected at line ~a, col ~a" line col) line col)))
                      (t (pop stack))))
               ((char= ch #\Newline)
-               (incf line) (setf col 0))))
+               (incf line) (setf col 0)))
         (unless (char= ch #\Newline) (incf col))))
     (if (null stack)
         (values t nil nil nil)
@@ -231,7 +231,7 @@ Recursively walks the parsed AST and verifies whitelisted symbols.
     ;; Time
     get-universal-time get-internal-real-time sleep
     ;; Equality
-    equalp = equal eq eql))
+    equalp = equal eq eql)
   "Static whitelist of symbols permitted in the Lisp Utils sandbox.")
 
 (defun lisp-utils-ast-walk (form)
@@ -373,7 +373,7 @@ Intercepts :syntax-error events and repairs the code.
                                     repaired)
                                 (error ()
                                   (harness-log "LISP REPAIR: Neural repair failed.")
-                                  (list :type :LOG :payload (list :text "Lisp Repair Failed."))))))))))))
+                                  (list :type :LOG :payload (list :text "Lisp Repair Failed.")))))))))))
 #+end_src
 
 ** Skill Definition: Lisp Validator
@@ -419,24 +419,37 @@ Validates all Lisp code before execution.
 
 (in-suite lisp-utils-suite)
 
+;; Character utilities
+;; Character utilities
 (test count-char-balanced
-  (is (= (count-char #\( "(+ 1 2)") 1))
+  (is (= (opencortex::count-char #\( "(+ 1 2)") 1))
-  (is (= (count-char #\) "(+ 1 2)") 1))
+  (is (= (opencortex::count-char #\) "(+ 1 2)") 1)))
 
 (test count-char-unbalanced
-  (is (= (count-char #\( "(+ 1 2") 1))
+  (is (= (opencortex::count-char #\( "(+ 1 2") 1))
-  (is (= (count-char #\) "(+ 1 2") 0))
+  (is (= (opencortex::count-char #\) "(+ 1 2") 0)))
 
+(test count-char-empty
+  (is (= (opencortex::count-char #\( "") 0)))
+
+;; Deterministic repair
 (test deterministic-repair-balanced
-  (is (string= (deterministic-repair "(+ 1 2)") "(+ 1 2)")))
+  (is (string= (opencortex::deterministic-repair "(+ 1 2)") "(+ 1 2)")))
 
-(test deterministic-repair-unbalanced
+(test deterministic-repair-unbalanced-open
-  (is (string= (deterministic-repair "(+ 1 2") "(+ 1 2)")))
+  (is (string= (opencortex::deterministic-repair "(+ 1 2") "(+ 1 2)")))
 
+(test deterministic-repair-unbalanced-close
+  (is (string= (opencortex::deterministic-repair "(+ 1 2))") "(+ 1 2))")))
+
+(test deterministic-repair-empty
+  (is (string= (opencortex::deterministic-repair "") "")))
+
+;; Structural check
 (test structural-valid
   (multiple-value-bind (ok reason line col)
       (opencortex::lisp-utils-check-structural "(+ 1 2)")
-    (is ok)))
+    (is (eq ok t))))
 
 (test structural-unbalanced
   (multiple-value-bind (ok reason line col)
@@ -444,21 +457,40 @@ Validates all Lisp code before execution.
     (is (not ok))
     (is (search "Unbalanced" reason))))
 
+(test structural-mismatched
+  (multiple-value-bind (ok reason line col)
+      (opencortex::lisp-utils-check-structural "[)")
+    (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)))
+    (is (eq ok t))))
 
-(test semantic-whitelist
+(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)))
+    (is (eq ok t))))
 
-(test semantic-blocked
+(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))))
@@ -467,6 +499,16 @@ Validates all Lisp code before execution.
   (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))))
+
+(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))))
 #+end_src
 
 * See Also

skills/org-skill-llm-gateway.org

@@ -114,6 +114,24 @@ The gateway utilizes a functional dispatch pattern. A single entry point, `execu
   (opencortex:register-probabilistic-backend p (lambda (prompt system-prompt &key model)
                                         (execute-llm-request prompt system-prompt :provider p :model model))))
 
+(def-cognitive-tool :get-ollama-embedding
+  "Generates vector embeddings via Ollama API for semantic search."
+  ((text :type :string :description "Text to embed."))
+  :body (lambda (args)
+          (let* ((text (getf args :text))
+                 (host (or (uiop:getenv "OLLAMA_HOST") "localhost:11434"))
+                 (url (format nil "http://~a/api/embeddings" host))
+                 (model (or (uiop:getenv "OLLAMA_EMBEDDING_MODEL") "nomic-embed-text"))
+                 (body (cl-json:encode-json-to-string `((model . ,model) (prompt . ,text)))))
+            (handler-case
+                (let* ((response (dex:post url :headers '(("Content-Type" . "application/json")) :content body :connect-timeout 5 :read-timeout 30))
+                       (json (cl-json:decode-json-from-string response)))
+                  (let ((embedding (cdr (assoc :embedding json))))
+                    (if embedding
+                        (list :status :success :vector embedding)
+                        (list :status :error :message "No embedding in response"))))
+              (error (c) (list :status :error :message (format nil "Ollama Embedding Failure: ~a" c)))))))
+
 (def-cognitive-tool :ask-llm 
   "Queries an LLM provider via the unified gateway."
   ((:prompt :type :string :description "The user prompt.")

skills/org-skill-tool-permissions.org

@@ -0,0 +1,118 @@
+:PROPERTIES:
+:ID:       tool-permissions-skill-001
+:CREATED:   [2026-04-23 Thu]
+:END:
+#+TITLE: SKILL: Tool Permission Tiers
+#+STARTUP: content
+#+FILETAGS: :security:permissions:tool:
+
+* Overview
+This skill implements tool permission tiers for security - controlling which cognitive tools can execute without user interaction.
+
+Also provides vector embeddings via Ollama or llama.cpp.
+
+** The Three Tiers
+
+| Tier | Behavior | Use Case |
+|------|----------|----------|
+| =:allow= | Executes immediately | Trusted, safe tools |
+| =:deny= | Blocks before execution | Dangerous tools |
+| =:ask= | Prompts user, pauses execution | Sensitive tools |
+
+** Embedding Providers
+- =EMBEDDING_PROVIDER= environment: "ollama" or "llama.cpp"
+- =OLLAMA_HOST= / =LLAMA_HOST= for the API endpoint
+- =EMBEDDING_MODEL= model name
+
+* Implementation
+Tool permissions and embedding generation via multiple providers.
+
+#+begin_src lisp :tangle ../library/gen/org-skill-tool-permissions.lisp
+(in-package :opencortex)
+
+(defvar *tool-permissions* (make-hash-table :test 'equal)
+  "Hash table mapping tool names to :allow/:deny/:ask.")
+
+(defun get-tool-permission (tool-name)
+  (let ((key (string-downcase (string tool-name))))
+    (or (gethash key *tool-permissions*) :allow)))
+
+(defun set-tool-permission (tool-name tier)
+  (setf (gethash (string-downcase (string tool-name)) *tool-permissions*) tier)
+  (harness-log "TOOL PERMISSION: Set ~a = ~a" tool-name tier))
+
+(defun check-tool-permission-gate (tool-name context)
+  (declare (ignore context))
+  (let ((perm (get-tool-permission tool-name)))
+    (case perm
+      (:allow :allow)
+      (:deny :deny)
+      (:ask (list :ask tool-name context))
+      (t :allow))))
+
+(def-cognitive-tool :get-embedding
+  "Generates vector embeddings via Ollama or llama.cpp API."
+  ((:text :type :string :description "Text to embed."))
+  :body (lambda (args)
+          (let* ((text (getf args :text))
+                 (provider (or (uiop:getenv "EMBEDDING_PROVIDER") "ollama"))
+                 (model (or (uiop:getenv "EMBEDDING_MODEL") "nomic-embed-text"))
+                 (embedding nil))
+            (cond
+              ((string= provider "ollama")
+               (let* ((host (or (uiop:getenv "OLLAMA_HOST") "localhost:11434"))
+                      (url (format nil "http://~a/api/embeddings" host))
+                      (body (cl-json:encode-json-to-string `((model . ,model) (prompt . ,text)))))
+                 (handler-case
+                     (let* ((response (dex:post url :headers '(("Content-Type" . "application/json")) :content body :connect-timeout 5 :read-timeout 30))
+                            (json (cl-json:decode-json-from-string response))
+                            (vec (cdr (assoc :embedding json))))
+                       (when vec (setf embedding vec)))
+                   (error (c) (harness-log "EMBEDDING: Ollama failed: ~a" c)))))
+              ((string= provider "llama.cpp")
+               (let* ((host (or (uiop:getenv "LLAMA_HOST") "localhost:8080"))
+                      (url (format nil "http://~a/v1/embeddings" host))
+                      (body (cl-json:encode-json-to-string `((model . ,model) (input . ,text)))))
+                 (handler-case
+                     (let* ((response (dex:post url :headers '(("Content-Type" . "application/json")) :content body :connect-timeout 5 :read-timeout 30))
+                            (json (cl-json:decode-json-from-string response))
+                            (data (cdr (assoc :data json)))
+                            (vec (when data (cdr (assoc :embedding (car data))))))
+                       (when vec (setf embedding vec)))
+                   (error (c) (harness-log "EMBEDDING: llama.cpp failed: ~a" c))))))
+            (if embedding
+                (list :status :success :vector embedding)
+                (list :status :error :message "Embedding generation failed")))))
+
+(def-cognitive-tool :tool-permissions
+  "View or set tool permission tiers."
+  ((:tool :type :string :description "Tool name")
+   (:action :type :keyword :description "Action: :get, :set, :list" :default :get)
+   (:tier :type :keyword :description "For :set: :allow/:deny/:ask"))
+  :body (lambda (args)
+          (let ((tool (getf args :tool))
+                (action (getf args :action :get))
+                (tier (getf args :tier)))
+            (case action
+              (:get (list :status :success :tool tool :permission (get-tool-permission tool)))
+              (:set (progn (set-tool-permission tool tier)
+                        (list :status :success :message (format nil "Set ~a = ~a" tool tier))))
+              (:list (let ((r nil))
+                       (maphash (lambda (k v) (push (list :tool k :permission v) r)) *tool-permissions*)
+                       (list :status :success :tools r)))
+              (t (list :status :error :message "Invalid action"))))))
+
+;; Defaults
+(set-tool-permission :shell :deny)
+(set-tool-permission :delete-file :deny)
+(set-tool-permission :eval :ask)
+(set-tool-permission :write-file :ask)
+(harness-log "TOOL PERMISSIONS: Initialized")
+
+(defskill :skill-tool-permissions
+  :priority 600
+  :trigger (lambda (c) (declare (ignore c)) nil)
+  :deterministic (lambda (a c)
+    (let ((tool (getf (getf a :payload) :tool)))
+      (when tool (check-tool-permission-gate tool c)))))
+#+end_src