Use the tunnel subprocess' stdin for sending control messages and
stdout for receiving control events, instead of a separate Unix
domain socket. This eliminates:
- Temporary directory creation (/tmp/sc-<random>/)
- Socket path and auth token in config JSON
- Connection retry loop (50x at 200ms)
- Auth message handshake
- Socket cleanup on call end
The tunnel's stderr is captured separately for logging. Config JSON
is written as the first line on stdin, followed by control messages.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Call events are no longer subscribed by default. JSON-RPC clients must
explicitly call subscribeCallEvents to receive callEvent notifications
and enable incoming call handling. This avoids sending unwanted call
events to clients that don't use voice calling.
Also adds unsubscribeCallEvents for cleanup, idempotent subscription
guard, and updates CALL_TUNNEL.md to document the subscription step.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
The signal.cli.install.dir system property was never set by the Gradle
start script or anywhere else. Replace it with code source detection:
resolve the jar's parent directory to find the install root, then look
for bin/signal-call-tunnel relative to that.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Add documentation about the architecture, protocol, and implementation of
signal-call-tunnel, the secure tunnel subprocess for voice calling.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
