Newline-delimited JSON over Unix socket (macOS/Linux, chmod 600, UID-checked
via SO_PEERCRED/getpeereid) with TCP loopback fallback on Windows. Port written
to ~/.pyra/daemon.port for Windows clients. Sync send_command() wrapper for CLI.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
curo1305