With a job registry composed, tool-bash and tool-pwsh now register every
command with ctx.jobs as it starts and wait on the job with the registry's
own bounded wait: a command that finishes in time returns the ordinary
foreground result and its record is removed, one that outlives the timeout
returns the same job id it already had, and a kill from outside the call is
reported as `[stopped: <reason>]`. Nothing changes hands at the deadline, so
the shell seam loses `onExpiry: 'offer'`, `ShellExecution.promotion`, and
`ShellPromotionOffer`, and both local executors drop their offer arm.
The registry stays optional: the tools register a foreground-only definition
while no registry is composed and swap to the job-backed one inside a
`ctx.inject(['jobs'])` fork, so a composition without jobs keeps a plain bash
with no job tools in the model's schema. A refused registration at the start
(admission, no controller) runs under the executor's deadline kill, and a wait
that expires before the process spawned ends as the preparation timeout.
JobRegistry gains `remove(id, caller?)` and the `settled` event reports
`awaited`, so dsh-tool-jobs no longer keeps its own wait ledger; it withholds
notices for awaited settlements and for kills the model requested. The tool
catalog harvest composes the registry so the shipped schema stays documented,
and the two compaction fixtures move their context window from 10000 to 10300
tokens because the branch's larger tool schemas pushed their condensed history
over the old trigger, which requested a fourth scripted model call.
The subprocess runtime rejects a handle's done with the cancellation reason
when it terminated the managed range before the target started, which the
Windows runner does whenever an abort or kill() races the launch. Both
executors filed that rejection as a provider failure, so result() re-threw
the caller's own AbortError instead of resolving the aborted or killed
classification. A live handle whose rejection follows this execution's own
kill() or spawn-signal abort now settles as that terminal outcome; a
synchronous spawn throw, which never produced a handle, stays a failure.
The offer arm relayed the caller signal only through an abort listener, which a signal that was already aborted never fires, so a command cancelled before execute() spawned anyway, ran to its deadline, and was offered for promotion. The deadline callback also offered regardless of an earlier caller abort, so a process still in its termination grace could be promoted after the tool call was aborted. Both providers now relay an already-aborted signal immediately and settle the promotion undefined at the deadline once the caller aborted; the seam JSDoc states that an already-aborted signal counts as fired. Real-process and hanging-backend cases cover both providers.
A rejected background spawn produces no process output, so the observed stderr reader the job registry pumps was empty and the model's job_output after such a failure showed only killed before exit, where master's consuming read rendered [stderr] followed by spawn failed: … with the cause. The local providers now serve the note as the whole observed stderr stream once the spawn rejected, and the consuming read still folds it in exactly once, so the model's first read after the failure is byte-identical to master's. ShellProcess.observed and both of its readers are required: every background process exposes offset readers, and the shell tools' pull sources no longer carry a no-readers branch.
Spec files that create /tmp/dsh-* directories via mkdtemp now track and
delete them in afterEach/afterAll; module-scope fixture dirs (executor
spill dirs) are removed in afterAll. The file list came from the
observed-residue inventory on the self-hosted CI host: only specs whose
dirs actually accumulated were leak sources (issue #3134), superseding
the kept-but-unmerged CI sweep branch per the #3233 review decision.
Product per-process spill roots (dsh-subprocess-local spawn,
dsh-spill-local store) register a process-exit handler that removes the
memoized dir, so processes that used the spawn/spill path clean up on
normal exit. A SIGKILLed process cannot run in-process teardown; the
machine-side timer remains the backstop for that path.
Agent Note: .agents/notes/implemented/process/2026-08-28-test-temp-dir-self-cleanup.md
The executor seam collapses run()/start() (and the planned begin()) into one
resolve() + execute(): the handle IS the live process, and the foreground
result, the background cursor, and the deadline's promotion offer are
projections over the same spawn. ShellExecSpec.onExpiry ('kill' default /
'offer' / 'none') replaces the implicit method split; one stdout budget applies
everywhere, the 'start ignores timeoutMs' wart dies, and sync spawn throws are
contained into the same settled-killed handle as async rejections (result()
rejects with the original error, identity preserved for the sandbox
classification).
The promotion offer settles exactly once and never rejects — offer at an
'offer' deadline while running, undefined when the process settles first — so
'await execution.promotion' alone distinguishes the outcomes. An offer must be
answered synchronously; an unanswered one auto-declines back to the
kill-on-timeout behavior. accept() ends the deadline and detaches the caller's
abort signal; decline() kills and classifies timedOut.
tool-bash and tool-pwsh promote on timeout by default (promoteOnTimeout: true,
inert without run_in_background or a job registry): at the offer the running
handle registers as a job with the same hooks as run_in_background, mirrors
into ctx.activities (the web task list streams it, stop control included), and
the call returns { kind: 'promoted', jobId, timeoutMs, output } carrying the
output so far — the job cursor continues exactly after it. Any promotion
failure declines and falls back to the plain timeout kill. Descriptions and
the timeoutMs schema text advertise the semantics only when they hold;
recorded-session and web snapshot fixtures re-recorded with them.
Also repairs the four CI failures from the human-kill push: ui-activity's
missing dsh-session peer declaration (static + windows observational), the
observe owner-arm/outer-catch and killJob-stub coverage gaps, tool-workflow's
owned-run arm, and the timing-dependent projection-cache interval flush test
(now poll-based for coarse Windows timers).
Peer evidence and rejected alternatives (Codex's session model, a third seam
method, a second threshold knob) in the Agent Note
2026-08-26-shell-execute-timeout-promotion.
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