docker: two ways to talk to the loose agent

Remote Control, so a detached run is not a one-way trip:

  ./sylph-agent remote   -> https://claude.ai/code/session_...
  ./sylph-agent attach   -> the container's own terminal

`loose` now starts Claude Code with `--remote-control <name>`, registering the
session with your account so you can chat with it from claude.ai or a phone.
The name is passed EXPLICITLY because the flag's value is optional — a bare
`--remote-control` swallows the /loop prompt that follows as the session name.
Off with SYLPH_REMOTE=0, renamed with SYLPH_REMOTE_NAME.

The pty is forced to 200x50. A detached `docker run -t` gives 80x24, and Claude
Code hard-wraps to the terminal width — which truncated the Remote Control URL
to ".../session_01..." in the one place you actually need to read it, and made
`docker logs` nearly unusable besides.

`remote` waits up to six minutes and reports progress: registration lands a
minute or two after launch, so answering "not found" immediately would be
answering a different question than the one being asked.

Verified: a loose run registers and `./sylph-agent remote` prints the full URL.
`attach` is NOT verified end to end from here — `docker attach` refuses a piped
stdin ("cannot attach stdin to a TTY-enabled container"), which is a property of
this harness rather than of the container, so it needs a real terminal to try.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

docker/agent/bin/claude-autonomous

@@ -28,6 +28,12 @@
 set timeout 90
 log_user 1
 
+# Give the pty a wide, tall geometry. A detached `docker run -t` defaults to
+# 80x24, and Claude Code hard-wraps to the terminal width — which truncates the
+# Remote Control URL to "https://claude.ai/code/session_01…" in the one place
+# you need to read it, and makes `docker logs` nearly unusable generally.
+set stty_init "rows 50 cols 200"
+
 set answered_theme 0
 set answered_trust 0
 set answered_bypass 0