#+TITLE: SKILL: Cron Agent (Temporal Heartbeat)
#+ID: skill-cron-agent
#+STARTUP: content

* Overview
The **Cron Agent** serves as the system's temporal conscience. By hooking into the background heartbeat, it provides the agent with autonomous, time-aware capabilities, allowing it to transition from a purely reactive tool to a proactive executive assistant.

* The Temporal Mandate
1. **Punctuality:** The agent must monitor deadlines and alerts, ensuring nothing slips through the cracks.
2. **Efficiency:** To conserve resources, the neural layer (System 1) should only be invoked if the symbolic layer (System 2) confirms that a temporal threshold has been crossed.
3. **Multi-Channel Awareness:** Alerts should be routed to the most appropriate channel (Emacs or external delivery) based on the task's context.

* Symbolic Implementation (The Logic)
The implementation below defines how the system perceives time and filters tasks for neural processing.

** Architectural Intent: Heartbeat Perception
This trigger aligns the skill with the system's periodic heartbeat pulse, ensuring consistent temporal checks without excessive overhead.

#+begin_src lisp
(defun trigger-skill-cron (context)
  (let ((type (getf context :type))
        (payload (getf context :payload)))
    (and (eq type :EVENT)
         (eq (getf payload :sensor) :heartbeat))))
#+end_src

** Architectural Intent: Temporal Parsing
This utility function translates human-readable Org-mode timestamps into a machine-comparable format, bridging the gap between notes and logic.

#+begin_src lisp
(defun parse-org-timestamp (ts-str)
  "Extract year, month, and day from an Org timestamp (e.g. <2026-03-24 Tue>) 
   and return its universal-time representation."
  (let ((match (nth-value 1 (cl-ppcre:scan-to-strings "<(\\d{4})-(\\d{2})-(\\d{2}).*>" ts-str))))
    (if match
        (encode-universal-time 0 0 0 
                               (parse-integer (aref match 2)) 
                               (parse-integer (aref match 1)) 
                               (parse-integer (aref match 0)))
        nil)))
#+end_src

** Architectural Intent: Proactive Deadline Audit
This function acts as the "System 2 Filter." It audits all active TODOs, compares them against the current time, and only wakes up the neural layer if it identifies overdue items that require an alert.

#+begin_src lisp
(defun neuro-skill-cron (context)
  "Checks for deadlines and only wakes the LLM if action is needed."
  (let* ((all-tasks (org-agent:context-query-store :todo-state "TODO" :type :HEADLINE))
         (now (get-universal-time))
         (overdue-tasks nil))
    
    (dolist (task all-tasks)
      (let* ((attrs (org-agent:org-object-attributes task))
             (deadline-str (getf attrs :DEADLINE))
             (title (getf attrs :TITLE)))
        (when deadline-str
          (let ((deadline-time (parse-org-timestamp deadline-str)))
            ;; Only consider it overdue if the deadline has actually passed
            (when (and deadline-time (<= deadline-time now))
              (push (format nil "[~a] Was due - ~a" title deadline-str) overdue-tasks))))))
    
    (if overdue-tasks
        (let* ((all-delivery (mapcar (lambda (task) 
                                       (getf (org-agent:org-object-attributes task) :DELIVERY))
                                     all-tasks))
               ;; Check if any overdue task specifically requested external delivery
               (target (if (cl:some (lambda (d) (not (null d))) all-delivery) :delivery :emacs)))

          (format nil "
            You are the user's Executive Assistant.
            The heartbeat monitor just woke you up.

            The following tasks are officially OVERDUE:
            ~a

            Draft a very short, polite alert message to the user warning them about these deadlines.

            Return a Lisp plist - (:target ~a :action :message :text \"your alert\")
            If target is :delivery, make the message extra concise for a phone notification.
          " overdue-tasks (if (eq target :delivery) ":delivery" ":emacs")))
        nil)))
#+end_src

** Architectural Intent: Symbolic Verification
A standard pass-through to ensure the proposed alert reaches its intended actuator.

#+begin_src lisp
(defun verify-skill-cron (proposed-action context)
  proposed-action)
#+end_src

* Registration
#+begin_src lisp
(defskill :skill-cron
  :priority 60
  :trigger #'trigger-skill-cron
  :neuro #'neuro-skill-cron
  :symbolic #'verify-skill-cron)
#+end_src