juanibiapina/pi-send

Pi Send

Send a message to another active pi session using the pi-socket extension. Each pi session exposes a Unix socket at <cwd>/.local/share/pi/socket and a metadata file at <cwd>/.local/share/pi/socket.info.json.

Finding the target session

Sessions always run from a project directory at $WORKSPACE/<owner>/<repo>. The socket info file is at:

cat $WORKSPACE/<owner>/<repo>/.local/share/pi/socket.info.json

Fields: socketPath, cwd, pid, sessionFile, startedAt.

Sending a message

Protocol: newline-delimited JSON over the Unix socket. Send a send_user_message request:

echo '{"type":"send_user_message","message":"your message here"}' | nc -U <socketPath>

Response: {"ok":true,"result":{"accepted":true,"delivery":"immediate"}} on success.

Build the JSON payload safely to handle special characters:

PAYLOAD=$(python3 -c "import json,sys; msg=sys.stdin.read(); print(json.dumps({'type':'send_user_message','message':msg}))" <<< "$MESSAGE")
echo "$PAYLOAD" | nc -U <socketPath>

Other request types

• {"type":"ping"} — check if session is alive, returns pong
• {"type":"get_state"} — returns cwd, idle, sessionName, sessionFile
• {"type":"abort"} — abort current operation
• {"type":"shutdown"} — shut down the session

Gotchas

• nc must be used, not socat (not available)
• The message must be a single JSON line terminated with \n — nc -U handles this
• If the session is busy, delivery will be followUp (queued) instead of immediate
• Max message size is 256KB