The wave-3 gate's booked finding 1: the git row's exit-report order
was honored by scheduling, not by construction — into_stream()'s
ChannelCloseOnDrop spawned a CHANNEL_CLOSE send racing the
exit_status_request send for a queue position on russh's bounded
message queue (event_buffer_size, default 10); a full buffer at the
serve tail could silently no-op the report.
- the seam now rides a split-halves duplex built from russh 0.65's
public API (its ChannelRx/ChannelTx are private): the reader is
git_map's ChannelHalveReader (owned read half, the private rx's
observation semantics repinned, no Drop path ever messages the
wire) and the writer the write half's ChannelTx via
make_writer_ext (poll_shutdown still sends EOF; the Rust 2024
capture phantom erased through a trait object)
- the report's send is now the sole close-contracting sender,
ordered ahead of the explicit close by sequential awaited sends on
the one handle — saturated buffer or not
- new wire row backlogged_seam_tail_still_reports_exit_status_before_close:
a volume flood freezes the armed client loop (the new harness
DataGate + the client data hook russh awaits inline) so the server's
flush pends and the bounded message queue saturates at the serve
tail; the gate's release drives the tail through the unwinding
contention — the row pins exit-status(0) before close under the
saturation and falsifies the old shape deterministically (15/15 red
under a temporary into_stream() revert, 10/10 green with the fix)
- doubles gain a race-safe per-repo serve gate (install_gate, the
double-check pattern over list_refs); harness gains
drive_with_data_gate (the drive* bodies factored into
mount_and_connect, existing signatures unchanged)
- all existing git wire rows unchanged and green (wire order
identical when the race does not fire); spawn-and-return intact;
tty rows untouched; event_buffer_size stays russh's default
(pinned in the row)
Verification: cargo test (default), --all-features, and six mixed
per-feature builds green; clippy x2 -D warnings; fmt -check;
cargo doc --no-deps 0 warnings; taskgraph validate (35 tasks).
glm-5.3-flash
9cf5bfbaf3