Daemon: replaces a spec that modelled only a client restart and never
crossed the daemon boundary, whose successor generation owned nothing so
"the live successor is neither killed nor replaced" was vacuous. The PTY
leader is now a real login shell reporting `$$` back through the
production write path, resolved to a kernel start time. Two mutations
each redden exactly one of the three clauses, on macOS and Linux:
reverting three-valued `hasPty` reddens only the unknown-not-dead
clause; widening the sole-provider fallback reddens only the stale
generation clause.
Skew: reverting the restore-required publication to expiry reddens 4 of
5 new tests while the legacy control stays green — the regression this
branch fixed is now caught if reintroduced.
Multi-host: restoring `mux.dispose('connection_lost')` reddens sibling
isolation on one host. It does NOT redden across hosts, and that is
recorded rather than glossed: a mux belongs to one relay session per
target, so its dispose cannot cross a host boundary. Journey 4's
cross-host clause rests on isolation-by-construction, not on a mutation.
No production code changes.
Co-authored-by: Orca <help@stably.ai>
The previous induction closed a pane while the transport was severed and
relied on `pty:kill` FAILING so the lease outlived the pane record. It
does not fail: with the provider already torn down, `pty:kill` takes its
tombstone branch and marks the lease terminated, and `reattachKnownPtys`
filters terminated leases out of the fan-out — so the reconnect never
visited the PTY the test was about. It passed on both trees.
Seed the precondition instead. Spawn a real remote PTY on a leaf that
never becomes a pane, then roll the host partition back to its pre-spawn
snapshot, leaving a live lease and a live remote shell that no durable
pane owns. No failure races a success.
Adds a vacuity guard that is independent of the tree under test: the
lease's own `lastAttachedAt` must advance, proving the fan-out actually
visited this lease before the pane census is trusted.
Verified on this machine under an isolated TMPDIR, since the e2e
harness keys its seeded-repo pointer on a machine-global tmpdir path:
guard present passes, guard removed fails with the phantom leaf grafted
into the local partition, guard restored passes.
Co-authored-by: Orca <help@stably.ai>
Six parallel streams, each required to fail with its guard removed rather
than merely pass.
Local restart proves the OS process itself survives, by reading
`ps -o lstart=` for the shell's own pid. That matters: with the quit path
made destructive, the tab, leaf and pty ids all came back byte-identical
while the shell underneath was a new process — every existing restart
spec would have stayed green. Two separate guards were removed to redden
it, and the second reddens only the stale-operation case.
Daemon restart discriminates by reverting three-valued `hasPty`; version
skew now covers publication semantics and confirms the new
`SSH_SOURCE_RESTORE_REQUIRED` token mutates nothing on an old client;
two-host isolation censuses both containers.
Deletes `src/relay/pty-source-replay-index.ts` — 201 production lines
with no importer outside its own test, verified against an
entrypoint-rooted import graph rather than a name grep.
Five namespace tests are skipped, not passing: they reproduce a defect
still live on main where folder-workspace ids compare equal with the
instance suffix stripped. PR #12474 fixes it; they are its oracle.
Co-authored-by: Orca <help@stably.ai>
Mixed versions are the normal state of the remote-server feature: users update clients and servers independently. Until now nothing tested that. Every cross-version claim was made by code reading plus unit tests with hand-written old/new shapes — enough to catch design problems, not enough to catch a real skew regression.
This runs the REAL protocol implementations from two builds against each other in one process: the actual host methods and RPC dispatcher on one side, the actual renderer multiplexer on the other, with a transport that reproduces the production asymmetry — each side decodes with its OWN codec and drops frames whose opcode it does not know. A frame survives only if the RECEIVING build understands it, which is what makes this level sufficient without launching two apps. The old side is a genuine checkout extracted from the release tag; the extracted client was confirmed to lack a symbol that exists only on main.
Journey: subscribe, first snapshot, input reaching the process, live output, hide/reveal snapshot, transport drop, resubscribe, input landing again — across old->new, new->old, and a current/current control. Every step ends on an observed-state barrier; no sleeps. The oracle asserts the recorded step list, the exact 16-frame named sequence, negotiated capabilities, the exact input the host wrote to the PTY, rendered content, and zero decoder-rejected frames. A host method the stub lacks is recorded by name and asserted empty, so a harness gap cannot masquerade as a wire break.
Detection is proven per violation shape, and it attributes each to the correct side: an unnegotiated opcode goes red only where a decoder would reject it, a removed published field goes red only where an old client consumes it, and a legal additive field stays green in all three pairings so the harness will not cry wolf on safe changes.
It also documents the three compatibility rules in docs/reference/remote-wire-compatibility.md, linked from AGENTS.md, since they previously existed only as folklore — notably that "decoders reject unknown opcodes" is true for the desktop decoder but NOT for mobile, which silently drops them.
Deliberately scoped: terminal stream only. The session-tab sync channel is not covered, nor agent-session publications, file/Git RPCs, mobile E2EE framing, or the relay transport. Two version points, so a regression introduced and reverted between them is invisible.
CI selection was verified rather than assumed — `vitest list` confirms 0 matches under the shard's exclude and 4 under the dedicated job — because a lane silently running zero tests is precisely how a host-side defect escaped CI earlier in this series. Closes STA-3469.
NeilandOrca
Jinwoo Hong