Closes the #3110 split — lib.rs is now just the crate doc comment and
the pub mod list.
journal.rs's new doc comment fixes a pre-existing bug: the old
JournalPriority doc text in lib.rs was actually half Capability's doc
(a leftover from an earlier reorder that moved the code but not the
comment above it).
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.
Six places in the tree hand-rolled the same connect / write one JSON
line / read one JSON line back. Two of them — the harness serve loop's
client and the MCP server's — were byte-identical apart from a six-line
wrapper, ~145 lines of literal copy-paste. The other four each
reimplemented a subset, and the subsets had drifted: some named the
socket path in their errors and some did not, one classified transient
against fatal failures and the rest retried nothing at all, two drained
the response and two decoded it.
That duplication was defended when the daemons were split out, on the
grounds that a daemon's socket etiquette should stay visible in the
crate that depends on it. The etiquette genuinely does differ. The code
does not, and five copies is where "each daemon documents its own
etiquette" stops paying for itself.
`hive-sock-client` now owns the transport once, generic over the
request and response types so it is protocol-agnostic: the host-served
control socket and the harness's in-agent socket both use it with their
own wire-type crates. The two real differences become values instead of
forks. Retry is `Retry::RideOutRestart` (2/4/8/16/30s, sized to ride out
a service restart) for callers with no natural retry of their own, or
`Retry::None` for callers already inside a poll loop where the poll
interval is the retry — and the reason each caller picked one is a
comment at the call site rather than a reimplementation. The response is
either decoded (`request`) or half-closed and drained (`notify`, where
the drain exists so the server's write-back doesn't land on a closed
socket). Whether a failure propagates or is logged and swallowed stays
at the call site, because that is the caller's choice and not a property
of the transport.
Errors always name the socket path now, everywhere. That detail is
load-bearing: a permission problem on a socket that reads as "is the
daemon running?" sends the operator to fix the wrong thing.
The transient-against-fatal enum is gone rather than moved. Serialising
happens before the retry loop and deserialising after it, so only
connect, I/O and short-read failures can reach the loop at all — a
deterministic failure is now unretryable by construction instead of by
classification.
It is deliberately a new crate and not part of `hive-agent-sock`. The
`*-sock` crates are pure wire types by convention — `hive-agent-sock`
depends on serde and nothing else — and the two largest copies talk to
the host socket, whose types live in a different crate entirely. A
transport in either wire-type crate would drag tokio into it and point
the wrong way besides.
No wire-format change: same JSON line in, same line out.
per mara's review on #2679: replace the separate dispatch_todo sub-match
(with its trailing unreachable! arm) with four small handler functions
called directly from dispatch's existing match. same behavior, no
unreachable! left in the todo path.
diagnostic instrumentation for #2678 (phantom 'you have todos' wakes
after clearing bash-task todos). logs subsystem/key/id/changed on
UpsertTodo, subsystem/key/all/count on ClearTodo, id/count on
MarkTodoDone, and a marker when the serve loop actually consumes a
todo_wake notification. no behavior change - RUST_LOG=debug only.
