hive-c0re pushes todos into each agent over the in-agent socket, and
every one of those dials has been failing with EACCES. The socket is
created by todo_server::bind with no mode set at all, so it lands at
0777 & ~umask -- typically 0755. connect(2) on a unix socket requires
*write* permission, and hive-core is neither the socket's owner nor in
its group, so it is locked out.
The tell is the sibling socket. web.sock is bound in the same
directory, by the same process, as the same user, and does set its mode
(0666) immediately after bind. Only the socket missing that call fails,
which is also why no ownership or chown theory explained it: both
sockets share every directory they live in, so anything at the
directory level would have broken them together.
Fix is the two lines web.sock already had. Access control for these
sockets is the containing directory's job, not the socket's -- the mode
here only has to not exclude the host daemon that is supposed to reach
it.
Observable effect: scheduled prompts and message wakes reach agents
again. An agent whose wake is dropped still sees its messages whenever
something else wakes it, so the failure presents as agents that look
healthy but answer late, or not at all if nothing else is waking them.
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