The line-aggregating stray capture added two branches — the post-truncation
early return and the residual-overflow admit — that the aggregation and
split tests did not exercise, so per-file coverage dropped below 100%. A
2 MB newline-free native write under a 4 KiB maxLogBytes drives the residual
across the budget (admit-and-truncate) and then short-circuits later chunks,
asserting the captured output ends at the truncation marker and stays under
budget rather than buffering the whole flood.
Wrap spawn and the fd-3 narrowing so a synchronous throw (ENAMETOOLONG on
an over-PATH_MAX pythonBin, EMFILE) removes the run's staging directory and
resolves the same worker-exit class as the async error event, instead of
rejecting run() and leaking the directory.
Aggregate native stdout/stderr by real newline rather than by Node data
chunk: logs entries are joined with "\n" downstream, so a newline-free
write larger than one pipe read no longer reads back with spurious breaks.
The ledger still bounds a newline-free flood.
Track a running scan offset in both frame readers so a large frame
accumulated across chunks is scanned once, not re-scanned from 0 per chunk.
Reword the deadline hard-bound v8-ignore to state its real environment
dependence (PID-1-doesn't-reap container, zombie survivor) and cross-ref
the note's rejected signal-0 alternative; fix settle comments that quoted
the pre-qualification teardown contract; document the capMessage vs
_cap_message billing split on both sides; guard the dispose-after-resolve
heartbeat assertion against a vacuous 0===0 pass; reuse
_TRUNCATION_MARKER_BYTES; note the abandoned-call pending-entry bound.
Update the Agent Note Decision/Testing/Alternatives/Consequences for the
above and record the confirmed-empty finalize as a second honest
fail-before exception; sync the zh pair.
The reap-poll deadline arm sent SIGKILL then finalized immediately, declaring
quiescence on mere signal delivery while the group was still dying. It now keeps
polling for the group to actually empty (bounded by one more reap margin) after
its self-sent SIGKILL, so `finished` resolves only on a confirmed-empty group.
ProtocolChannel.read_frame read the boot/run handshake frames through
FileIO.readline() on the unbuffered fd — one os.read(1) per byte, so a
multi-megabyte program burned CPU (RLIMIT_CPU already in force for the run frame)
in millions of syscalls before ast.parse. It now reads in chunks into the same
_pending buffer the async reader uses; the wrapping os.fdopen is gone. read_frame
is this PR's own code (e7f22ed3), not the protocol layer. The chunked read is a
syscall-count improvement with no cross-platform-deterministic failure to assert,
noted as such in the Agent Note.
The closed-loop reply-pump guard now ships with a deterministic regression test:
a worker thread abandons a binding so its loop closes, the host answers that call
before a later binding, and the pump must survive the closed-loop
call_soon_threadsafe to deliver the later reply (host-gated ordering makes it
deterministic; unguarding the pump hangs the later binding to the wall clock).
Align the quiescence self-description with the shipped setsid limitation:
teardown()'s JSDoc and the Agent Note's Problem line now qualify "no subprocess
outlives the fiber" to subprocesses that stay in the child's process group, with
a setsid()-escape exception pointing at the README. Tighten the setsid-orphan
fixture's self-timeout to 5s and its upper-bound assertion to <4000ms so a failed
deadline backstop is a sharper red. Register the new regression tests in the note.
The child reads these byte budgets through int(...), which silently floors a
float, so maxLogBytes: 3.5 would truncate at 3 bytes child-side while the host
meters and marks at 3.5 — the two sides enforcing different public config. Gate
them to integers at load, as the worker backend does; correct the stale comment
that claimed the int()-truncated caps needed no gate. Adds a regression test.
The SIGXCPU timeout message changed from "CPU budget (Ns) exhausted" to name the
configured value as a ceiling; two existing timeout tests asserted the old text.
Assert "CPU time exhausted" to match.
Raising maxValueBytes' load bound to ceiling-envelope assumed both budgets are
metered in serialized (JSON-escaped) bytes, which held for completion values and
logs but not the diagnostic: _cap_message capped by raw UTF-8, so a control-heavy
message near maxValueBytes could serialize sixfold and breach the fd-3 frame
ceiling — the silent worker-exit inversion the load check prevents. _cap_message
now accumulates per-byte serialized cost (new _JSON_BYTE_COST table) and cuts the
prefix that fits. Also reword the host SIGXCPU timeout message to name cpuSeconds
as the configured ceiling rather than a budget a stricter inherited RLIMIT_CPU
soft may undercut. Adds a control-heavy-diagnostic regression test.
The group-reap poll folded its deadline arm into the empty-group arm, so a host
event loop blocked past graceMs + CLOSE_REAP_MARGIN_MS would run the overdue
poll before the grace SIGKILL timer: the group is still non-empty, the deadline
has passed, and the shared arm cancelled the never-fired SIGKILL and finalized —
releasing a SIGTERM-ignoring same-group survivor for good. Split the arms: empty
group cancels the moot timer and finalizes; deadline-with-non-empty-group sends
SIGKILL itself (idempotent if the timer already ran) before finalizing. Adds a
regression test that busy-blocks the loop past both timers and asserts the
survivor's heartbeat freezes.
The group-reap poll's deadline arm (Date.now() >= deadline) is a backstop that
SIGKILL emptying the reachable group never reaches, leaving one uncovered branch
under the per-file 100% gate. Mark it v8-ignore with the reason and drop the
always-true graceTimer-defined guard inside pollGroup (it runs only when killing
is set, so kill() has armed the timer).
settle() dropped the run from `live` eagerly, before the grace-window SIGKILL
reaped a same-group survivor. A dispose() racing a just-resolved run() then
snapshotted an empty `live` and returned while the descendant was still alive,
so teardown's "no subprocess outlives the fiber" (and its JSDoc) was false for
that window. The run now stays in `live` until the process-group poll confirms
the group empty, at which point it is both dropped from `live` and its finished
promise resolved. Adds a regression test asserting dispose() of a completed run
with a same-group survivor returns only after the survivor stops executing.
The class docstring still credited the GIL plus per-frame PIPE_BUF atomicity for
serializing writes, which _write_lock's full-write loop already superseded. State
the current contract (writers serialized by _write_lock around a full-write loop)
and drop the double blank line under the binding-replies note heading.
The settlement-time CPU recheck compared spent CPU against the configured
cpuSeconds, but _clamped may have lowered the effective soft limit to a stricter
inherited value. A program that traps SIGXCPU, burns past the inherited soft,
and returns inside the soft-to-hard gap was checked against the configured value
and falsely reported successful, bypassing the inherited limit. The recheck now
uses the clamped cpu_soft. Adds a regression test that inherits a 1s soft CPU
limit and asserts a SIGXCPU-trapping over-burn is a timeout, not a success.
A binding called from a worker thread records that thread's loop for its reply.
If the thread finished and closed its loop before the host reply arrived,
_pump_replies' call_soon_threadsafe onto the closed loop raises RuntimeError;
unguarded, that ends the pump task and strands every later reply. Wrap the
schedule in a try/except that drops the moot reply (nothing awaits it) and keeps
the pump serving.
A descendant that calls setsid()/start_new_session leaves the child's process
group, so kill(-pid) teardown cannot reach it; if it also releases the inherited
pipes the run still settles and the fiber goes quiescent while the orphan runs.
This is the containment boundary (model code has bash-equivalent trust), not a
guarantee; reaching such an orphan needs descendant-pid tracking and is deferred.
Two further review findings on the CPython backend:
- The grace-window SIGKILL timer was left armed after settlement, so on a
normal completion a kill(-pid) could fire up to graceMs later and strike a
recycled pgid once the kernel reused the leader's pid. settle() now clears
the timer the moment the process group is confirmed empty (the normal path
and when the poll sees the survivor gone), bounding the reuse window to the
genuine-survivor case where the group cannot be empty to reuse.
- _clamped bounded rlimits by the inherited hard limit only, silently raising
an inherited soft limit stricter than the request (loosening RLIMIT_AS or
deferring RLIMIT_CPU SIGXCPU). It now clamps each side against its own
inherited counterpart and pins soft under hard, keeping the strictest of
configured and inherited. Adds an inherited-soft-limit regression test.
Agent Note expanded to seven fixes with the two new rejected alternatives;
zh pair re-recorded.
Two review findings on the CPython backend:
- Disposal could return while a same-group descendant that ignores SIGTERM
but releases the inherited pipes was still alive: the leader's close fired
and the previous fix relied on an unref'd SIGKILL timer that a short-lived
host never fires, reparenting the survivor to init. settle() now withholds
the run's finished promise on a ref'd process-group poll until the SIGKILL
has emptied the group (bounded by graceMs + margin, zero-cost when already
empty), so teardown's "await each child's exit" holds.
- A binding called from a model worker thread via asyncio.run created its
reply Future on that thread's loop, but _pump_replies completed it directly
from the main loop; asyncio.Future is not thread-safe across loops, so the
call hung to the wall clock. Replies now complete via the owning loop's
call_soon_threadsafe, and a lock serializes the id claim/write/advance.
Tests: the same-group reap case now asserts a heartbeat file stops (robust
whether the killed descendant is reaped or a zombie, so it holds where PID 1
does not wait() orphans); a cross-loop case runs a binding from a worker
thread and asserts the reply round-trips instead of timing out. Agent Note
expanded to all six fixes with rejected alternatives; zh pair re-recorded.
The frame-ceiling cap test asserted the old (ceiling-envelope)/6 bound and
its 44739232 message. The load bound is now ceiling-envelope because both
budgets are metered in already-escaped bytes; assert 268435392.
Address review findings on the CPython backend:
- CRITICAL: a model program could leave a descendant in the child's own
process group that ignores SIGTERM but releases the inherited pipes, so
the leader's `close` fired and settle() cancelled the pending SIGKILL
before it escalated — run()/dispose() returned while that child lived.
kill() now unrefs the grace timer and settle() no longer clears it, so
the SIGKILL reaches the whole group; killGroup swallows ESRCH when the
group is already gone (the normal case). Adds a real-subprocess
regression test.
- WARNING: the maxLogBytes/maxValueBytes load bound divided the frame
ceiling by 6 for escape expansion, but both budgets are metered in
already-escaped serialized bytes, so a payload occupies at most
cap+envelope on the wire. Bound is now ceiling-envelope; drop the unused
escape constant.
- Narrow the runtime.spec.ts header to "no subprocess mocks" (it mocks
node:fs.copyFileSync for staging-failure cases).
- Use full-width punctuation in the README.zh.md prose per translation
rules; re-record the pair.
The package README (both languages) still described this layer as
protocol-only with the PythonCodeRuntime implementation deferred to a
later PR, contradicting the shipped code. Rewrite the intro to describe
the registered runtime, add a Configuration section for every Config cap,
and drop the "implementation not in this layer" limitation. Also pin the
residual-detach fixture's size invariant: the byteLength assertion only
holds above Node's Buffer pool threshold.
The manifest omitted @deepseek-ai/dsh-code-runtime although src/index.ts
imports CodeRuntime and the portable-identifier constants from it and the
tsconfig references ../code-runtime. A three-way package.json merge over
the protocol-layer stub dropped the entry; restore it in peer and dev
dependencies so the declaration matches the import.
Land the PythonCodeRuntime implementation on top of the fd-3 protocol
seam: python3 -I per run, binding namespace over fd 3, RLIMIT_CPU/AS,
wall-clock timer, and SIGTERM->grace->SIGKILL process-group teardown,
with the real-subprocess integration suite.
Fixes three defects surfaced on the source PR's review before they ship:
- boot-write failure resolved a worker-exit through finish()/settle()
that read wallTimer/onAbort/live in their TDZ, rejecting run() instead;
the boot write now runs after those bindings and the v8-ignore that hid
the branch is removed.
- log capture serialized against settlement with no lock while model
daemon threads keep writing; LogBuffer now owns one shared re-entrant
lock taken by write/flush_line/push.
- the fd-3 line residual was a subarray view pinning the whole joined
frame; it is copied into a right-sized Buffer via detachResidual so
pendingBytes measures what is retained.
Apply the rename pass to READMEs and docs the master sweep rewrote, fix
PTC mode anchors and the renamed-note links in the spill READMEs, and
regenerate the doc graphs.
Rename the tool-presentation transport from code-mode to ptc everywhere
that is not written into session logs: the mode config value becomes 'ptc',
the preset directory/id becomes ptc, the demo becomes demo:ptc, the
dispatch waterfall becomes tools/ptc-dispatch-log (types PtcDispatch*), the
prompt rule becomes tools:ptc-only, source/test files become ptc.ts etc.,
and prose says PTC mode / PTC 模式. The session-persistent vocabulary
(durable events tool/code-dispatch*, logged plugin name tools-code-mode,
sub-call id segment :code:) intentionally stays and moves in the stacked
persistence PR, which is blocked until the SESSION_FORMAT_VERSION v0→v1
migration lands with it. run_code, its code parameter, CodeSdkLanguage,
CodeRunFailedError, the dsh-code-runtime family, third-party codex names,
and frozen archived notes keep their names.
packages/AGENTS.md:18 requires a package-specific "No runtime invariant:"
reason on an empty installer. This one described a process-boundary
implementation and real-subprocess integration tests that the package does
not carry — it ships the wire-protocol codec and its Python mirror, covered
by protocol.spec.ts and protocol-mirror.e2e.ts.
The barrel's module comment described where a later implementation would sit
relative to this seam, which docs/AGENTS.md:38 keeps out of durable prose.
State what the module exports instead.
docs/AGENTS.md:38 keeps PRs, commits, and stack positions out of durable
prose. Both README sides described where this layer sits in a PR stack and
what a later PR would add, which goes stale the moment the backend lands.
Describe what the package owns instead: the wire protocol, with an exported
surface that carries no subprocess execution path.
Re-record README.i18n.yaml.
master added verify-dsh-package-licenses while this branch was open: every
repository-owned DSH package must declare "license": "MIT". This package
carried BSD-3-Clause from its creation, so the gate failed and took the
required "node 24 / static" lane down with it.
Resolutions:
- docs/module-graph.md, docs/config-catalog.md: generated files. Regenerated
with gen-module-graph and gen-config-catalog on the merged tree, then carried
the new package's entries into the Chinese sides and re-recorded both
pairings. Each side now differs from master by exactly the
code-runtime-python rows.
- scripts/verify-package-readme-model-experience.ts, tsconfig.host.json: master
renamed packages/bash -> packages/shell, packages/pty -> packages/terminal,
code-runtime-worker -> code-runtime-worker-thread and agent-tool-mode ->
agent-tool-presentation. Kept master's names and re-added this branch's
code-runtime-python entry.
Adapted the package to conventions master introduced while the branch was open:
version 0.1.0-rc.6 with publishConfig.access "public" (the release-member rule
check-workspace-constraints now enforces), the invariants project reference
moved to packages/runtime-diagnostics/invariants, and the README companion link
retargeted to code-runtime-worker-thread.
Every release member now declares publishConfig.access: public, so the scope no
longer mixes levels: the 221 packages/*/* and apps/* manifests join the vendored
framework and the native packages.
check-workspace-constraints drops the per-sequence expectation and holds every
release member to public, which is what stops a member from drifting back.
Access is a property of the package, not of a version: the dsh packages already
published as restricted become world-readable at their next publication.
Chinesezjc