Subroutine 0.9.10

• subroutine_whoami says beforehand when a sign-out would change who the tools are. Where
  the subroutine plugin's tools act with the token in its Agent token field, it adds a line
  saying so: Claude Code deletes that field when you sign out of Claude Code, uninstall the
  plugin or remove its marketplace, and the tools then act as whoever this machine's own
  credentials name. An agent of the project's own, from agent create --here, is out of reach of
  all three. It takes a plugin that passes its field under a name of its own, as current ones
  do; an older one cannot tell the field from a token set any other way, and says nothing.
• What to check before signing out on purpose is in
  docs/connecting.md, and
  the skill tells an agent what the new line means and what to offer.