Files
passepartout/org/channel-signal.org
Amr Gharbeia 8fd56dece3 v0.8.2: cleanup + prose + structure + decomposition + budget + errors
Phase 1 — dedup + hardening (~9 items):
- Remove duplicate *skill-registry* defvar from core-skills
- Merge *backend-registry* into *probabilistic-backends*, delete backend-register
- Remove inject-stimulus alias, standardize on stimulus-inject
- Add pre-eval sandbox (skill-source-scan) blocks restricted symbols before eval
- Remove dead plist-get function; remove duplicate json-alist-to-plist export
- Fix read-framed-message whitespace DoS (4096-iteration max)
- Add *read-eval* nil to dispatcher-approvals-process read-from-string (RCE)
- Add test-op to ASDF; update .asd version 0.4.3→0.7.2

Phase 2 — prose + contracts + reorder:
- Split ROADMAP: 2623→1089 lines (TODO only), CHANGELOG: 260→1528 lines (full DONE history, 14 versions reverse chron)
- Add Contracts + Overview to 6 channel files + embedding-native + programming-standards + symbolic-scope
- Reorder 28 .org files: Contract → Test Suite → Implementation (TDD order)
- Add 7-phase inline prose to think() in core-reason
- Expand USER_MANUAL: 183→461 lines (10 new sections)

Phase 3 — decomposition + export organization:
- Decompose think() into think-assemble-prompt, think-call-llm, think-parse-response orchestrator
- Organize 188 exports into 16 grouped sections by module

Phase 4 — budget enforcement + error protocol:
- Per-session budget enforcement (SESSION_BUDGET_USD env var, budget-exhausted-p, guard in think-call-llm)
- Error condition hierarchy (6 conditions: pipeline-error, llm-error, gate-error, budget-error, protocol-error)
- Restarts in loop-process: skip-signal, use-fallback, abort-pipeline
2026-05-13 09:17:48 -04:00

3.6 KiB

Channel Signal (channel-signal.org)

Channel Signal

Extracted from gateway-messaging in v0.5.0. Isolated platform — Signal-specific poll and send logic.

Overview

The Signal channel provides bidirectional communication via the signal-cli CLI tool. Messages received from Signal contacts are injected into the cognitive pipeline as :user-input signals with :source :signal. Outbound messages route through the actuator registry when the pipeline targets :signal.

The channel uses two functions: signal-poll (inbound sensor) and signal-send (outbound actuator). Both retrieve the Signal account identifier from the credentials vault. HITL commands (/approve, /deny) are intercepted before injection so approval flows work identically across all channels.

Contract

  1. (signal-get-account): returns the Signal phone number from the vault (via vault-get-secret :signal), or nil if not configured.
  2. (signal-poll): queries signal-cli receive --json for new messages, injects each non-system message as a :user-input stimulus with :source :signal. Handles JSON parse failures and network errors gracefully (logs and continues). HITL commands are intercepted before injection.
  3. (signal-send action context): sends a message via signal-cli send. Extracts :chat-id and :text from the action plist. Logs send failures without crashing the pipeline.

Implementation

(in-package :passepartout)
(defun signal-get-account ()
  (vault-get-secret :signal))

(defun signal-poll ()
  "Polls Signal for new messages and injects them into the harness."
  (let ((account (signal-get-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)
                    (log-message "SIGNAL: Received message from ~a" source)
                    (unless (ignore-errors (hitl-handle-message text :signal))
                      (stimulus-inject
                       (list :type :EVENT
                             :meta (list :source :signal :chat-id source)
                             :payload (list :sensor :user-input :text text)))))))))
        (error (c) (log-message "SIGNAL POLL ERROR: ~a" c))))))

(defun signal-send (action context)
  "Sends a message via Signal."
  (declare (ignore context))
  (let* ((payload (getf action :payload))
         (meta (getf action :meta))
         (chat-id (or (getf meta :chat-id) (getf payload :chat-id) (getf action :chat-id)))
         (text (or (getf payload :text) (getf action :text)))
         (account (signal-get-account)))
    (when (and account chat-id text)
      (handler-case
          (uiop:run-program (list "signal-cli" "-u" account "send" "-m" text chat-id)
                            :output :string :error-output :string)
        (error (c) (log-message "SIGNAL ERROR: ~a" c))))))

#+end_src