5.2 KiB
SKILL: Signal Gateway (Universal Literate Note)
Overview
The Signal Gateway provides bi-directional communication between the Autonomous and the OpenCortex via the `signal-cli` tool. It features a non-blocking polling sensor and a high-integrity actuator for outbound messaging.
Phase A: Demand (PRD)
1. Purpose
Enable secure Signal communication for the OpenCortex.
2. Success Criteria
- Inbound: Messages received via `signal-cli receive` are injected into the harness Bus.
- Outbound: The `:signal` target correctly routes messages via `signal-cli send`.
- Robustness: Handles JSON output from `signal-cli` and filters system messages.
Phase B: Blueprint (PROTOCOL)
1. Architectural Intent
Wraps the `signal-cli` binary. Polling is done in a background thread to prevent blocking the harness.
2. Semantic Interfaces
- `(:sensor :chat-message :channel :signal …)`
- `(:type :REQUEST :target :signal :chat-id "+1…" :text "…")`
Phase D: Build (Implementation)
Package Context
State: Signal Identity
Retrieves the Signal account number from the secure vault.
(defun get-signal-account () (vault-get-secret :signal))State: Polling Thread
Reference to the background thread responsible for message reception.
(defvar *signal-polling-thread* nil)Actuator: sendMessage
Executes the `signal-cli send` command.
(defun execute-signal-action (action context)
"Sends a message via signal-cli."
(declare (ignore context))
(let* ((payload (getf action :payload))
(chat-id (or (getf payload :chat-id) (getf action :chat-id)))
(text (or (getf payload :text) (getf action :text)))
(account (get-signal-account)))
(when (and account chat-id text)
(harness-log "SIGNAL: Sending message to ~a..." chat-id)
(handler-case
(uiop:run-program (list "signal-cli" "-u" account "send" "-m" text chat-id)
:output :string :error-output :string)
(error (c) (harness-log "SIGNAL ERROR: ~a" c))))))Sensor: receive & Injection
Polls for new messages and injects them into the harness.
(defun signal-process-updates ()
"Polls for new messages via signal-cli and injects them into the harness."
(let ((account (get-signal-account)))
(when account
(handler-case
(let* ((output (uiop:run-program (list "signal-cli" "-u" account "receive" "--json")
:output :string :error-output :string :ignore-error-status t))
(lines (cl-ppcre:split "\\n" output)))
(dolist (line lines)
(when (and line (> (length line) 0))
(let* ((json (ignore-errors (cl-json:decode-json-from-string line)))
(envelope (cdr (assoc :envelope json)))
(source (cdr (assoc :source envelope)))
(data-message (cdr (assoc :data-message envelope)))
(text (cdr (assoc :message data-message))))
(when (and source text)
(harness-log "SIGNAL: Received message from ~a" source)
(inject-stimulus
(list :type :EVENT
:payload (list :sensor :chat-message
:channel :signal
:chat-id source
:text text))))))))
(error (c) (harness-log "SIGNAL POLL ERROR: ~a" c))))))Start Polling
Initializes the Signal background thread.
(defun start-signal-gateway ()
"Initializes the Signal background thread."
(unless (and *signal-polling-thread* (bt:thread-alive-p *signal-polling-thread*))
(setf *signal-polling-thread*
(bt:make-thread
(lambda ()
(loop
(signal-process-updates)
(sleep 5)))
:name "opencortex-signal-gateway"))
(harness-log "SIGNAL: Gateway polling active.")))Stop Polling
Gracefully terminates the background thread.
(defun stop-signal-gateway ()
(when (and *signal-polling-thread* (bt:thread-alive-p *signal-polling-thread*))
(bt:destroy-thread *signal-polling-thread*)
(setf *signal-polling-thread* nil)))Registration: Actuator
Register the Signal channel as a physical actuator.
(register-actuator :signal #'execute-signal-action)Registration: Skill
Define the passive skill entry for the gateway.
(defskill :skill-gateway-signal
:priority 150
:trigger (lambda (ctx) (declare (ignore ctx)) nil) ;; Passive
:probabilistic nil
:deterministic (lambda (action ctx) (declare (ignore ctx)) action))Initialization
Trigger the polling loop upon loading.
(start-signal-gateway)