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passepartout/skills/org-skill-cli-gateway.org

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:PROPERTIES:
:ID: cli-gateway-skill
:CREATED: [2026-04-13 Mon 17:00]
:END:
#+TITLE: SKILL: CLI Gateway (Universal Literate Note)
#+STARTUP: content
#+FILETAGS: :gateway:cli:io:psf:
* Overview
The *CLI Gateway* is the primary interaction point for the Org-Agent MVP. It provides a lightweight TCP socket server that allows local terminal clients to communicate with the daemon. It ensures a frictionless "First Contact" experience immediately following installation.
* Phase A: Demand (PRD)
:PROPERTIES:
:STATUS: SIGNED
:END:
** 1. Purpose
Provide a secure, local, and low-latency terminal interface for the Org-Agent.
** 2. Success Criteria
- [X] *Ingress:* Accept plain-text messages over TCP port 9105.
- [X] *Normalisation:* Inject messages into the harness as `:chat-message` signals.
- [X] *Egress:* Implement the `:cli` actuator to route agent responses back to the correct client socket.
- [X] *Client:* Provide a standalone client script for the user's host machine.
* Phase B: Blueprint (PROTOCOL)
:PROPERTIES:
:STATUS: SIGNED
:END:
** 1. Architectural Intent
The gateway runs a multi-threaded TCP server. Each connection is handled in its own thread. Inbound lines are wrapped in a Signal and processed. The `:cli` actuator retrieves the `:reply-stream` from the signal context to send the response back to the specific connected client.
** 2. Semantic Interfaces
- Inbound: `(:sensor :chat-message :channel :cli :text "...")`
- Outbound: `(:type :REQUEST :target :cli :text "...")`
* Phase D: Build (Implementation)
** Package Context
#+begin_src lisp
(in-package :org-agent)
#+end_src
** State: Server Control
#+begin_src lisp
(defvar *cli-server-thread* nil)
(defvar *cli-server-socket* nil)
(defvar *cli-port* 9105)
#+end_src
** Actuator: CLI Response
The CLI actuator writes the agent's response back to the client's network stream. It applies a simple "Agent: " prefix for clarity.
#+begin_src lisp
(defun execute-cli-action (action context)
"Sends a message back to the connected CLI client via its network stream."
(let* ((payload (getf action :payload))
(text (or (getf payload :text) (getf action :text)))
(stream (getf context :reply-stream)))
(if (and stream (open-stream-p stream))
(progn
(format stream "Agent: ~a~%" text)
(finish-output stream))
(harness-log "CLI ERROR: No active reply stream for signal."))))
#+end_src
** Server: Client Handler
Handles an individual TCP connection. It reads lines until the connection is closed.
#+begin_src lisp
(defun handle-cli-client (stream)
"Reads lines from a CLI client and injects them as stimuli."
(handler-case
(loop for line = (read-line stream nil nil)
while line do
(let ((trimmed (string-trim '(#\Space #\Tab #\Newline #\Return) line)))
(when (> (length trimmed) 0)
(harness-log "CLI: Received input -> ~a" trimmed)
(inject-stimulus (list :type :EVENT
:payload (list :sensor :chat-message
:channel :cli
:text trimmed))
:stream stream))))
(error (c) (harness-log "CLI CLIENT ERROR: ~a" c))))
#+end_src
** Server: Main Loop
Listens for new TCP connections on the configured port.
#+begin_src lisp
(defun start-cli-gateway (&optional (port *cli-port*))
"Starts the TCP listener for local CLI clients."
(setf *cli-server-socket* (usocket:socket-listen "0.0.0.0" port :reuse-address t))
(setf *cli-server-thread*
(bt:make-thread
(lambda ()
(unwind-protect
(loop
(let* ((socket (usocket:socket-accept *cli-server-socket*))
(stream (usocket:socket-stream socket)))
(bt:make-thread (lambda ()
(unwind-protect (handle-cli-client stream)
(usocket:socket-close socket)))
:name "org-agent-cli-client-handler")))
(usocket:socket-close *cli-server-socket*)))
:name "org-agent-cli-gateway"))
(harness-log "CLI: Gateway listening on port ~a" port))
#+end_src
** Registration
#+begin_src lisp
(register-actuator :cli #'execute-cli-action)
(defskill :skill-gateway-cli
:priority 200
:trigger (lambda (ctx) (declare (ignore ctx)) nil)
:probabilistic nil
:deterministic (lambda (action ctx) (declare (ignore ctx)) action))
#+end_src
** Initialization
#+begin_src lisp
(start-cli-gateway)
#+end_src
* Phase E: The Client (Scripts)
We tangle a lightweight client script that the user can run on their host machine.
** The Bash Client
#+begin_src bash :tangle ../scripts/org-agent-chat.sh :shebang "#!/bin/bash"
# org-agent-chat: The terminal mouthpiece for the Sovereign Brain.
PORT=9105
HOST=${1:-localhost}
echo "Connecting to org-agent at $HOST:$PORT..."
echo "Type your message and press Enter. Ctrl+C to exit."
echo "--------------------------------------------------"
# Uses netcat (nc) for a simple bidirectional pipe.
# Requires an open connection. We use a simple loop for persistence.
while true; do
read -p "User: " MESSAGE
if [ -z "$MESSAGE" ]; then continue; fi
# Send message and wait for one line of response from Agent
echo "$MESSAGE" | nc -N $HOST $PORT
done
#+end_src