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Amir Mamaghani 544940807f feat(pico): add pico_client outbound WebSocket channel (#1198 )

* feat(pico): add pico_client outbound WebSocket channel

Add a client-mode counterpart to the existing pico server channel.
pico_client connects to a remote Pico Protocol WebSocket server,
enabling picoclaw to bridge messages with external Pico-compatible
services.

Includes config, factory registration, manager wiring, 8 unit tests,
and a minimal echo-server example for interactive testing.

* fix(pico): address PR #1198 review — goroutine leak, race, auth

- Add per-connection context cancel to picoConn to prevent pingLoop
  goroutine leak on disconnect
- Re-acquire mutex in StartTyping stop closure to avoid stale conn race
- Remove query-param token auth from echo server (header-only)
- Move ListenAndServe to main goroutine where log.Fatal is safe

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* fix: replace ConsumeInbound with InboundChan select in client test

MessageBus does not expose a ConsumeInbound method. Use a select on
InboundChan() with context cancellation, matching the pattern used in
the bus package tests.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

2026-03-20 20:43:40 +08:00

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pico-echo-server

Minimal Pico Protocol WebSocket server for testing the pico_client channel.

Usage

go run ./examples/pico-echo-server -addr :9090 -token secret

Flags

Flag	Default	Description
`-addr`	`:9090`	Listen address
`-token`	(none)	Auth token; empty disables auth

How it works

Listens for WebSocket connections at /ws
Authenticates via Authorization: Bearer <token> header or ?token=<token> query param
Prints received message.send content to stdout
Responds to ping with pong
Lines typed into stdin are broadcast as message.create to all connected clients

Testing with pico_client

Start the server:

go run ./examples/pico-echo-server -token mytoken

Configure pico_client in your config.json:

{
  "channels": {
    "pico_client": {
      "enabled": true,
      "url": "ws://localhost:9090/ws",
      "token": "mytoken",
      "session_id": "test-session"
    }
  }
}

Start picoclaw — the client connects and you can exchange messages interactively via stdin/stdout.

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