fix(service): recover the Windows proxy task after a session disconnect - #2991
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📝 WalkthroughWalkthroughWindows Task Scheduler XML now includes scoped session-recovery triggers. Registration checks validate these triggers and account scopes. Diagnostics resolve the effective trigger account. Windows repair re-registers stale tasks with snapshot checks and rollback handling. Windows mutations use a per-user lock. ChangesWindows session recovery
Estimated code review effort: 4 (Complex) | ~60 minutes Merge Risk: 🟡 Moderate · up to This change adds session-reconnect recovery and guarded Windows task replacement, but the current implementation can still leave the proxy stopped after a transient scheduler read failure, concurrent replacement, or an interrupted fresh install. Merge readiness is moderate until these bounded availability risks are fixed or explicitly accepted. Suggested reviewers: 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 57.78% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 45 functions across 12 files. (9 skipped: 9 unsupported.) ✨ Finishing Touches🧪 Generate unit tests (beta)
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리뷰 · 우선순위 43 / 80지금 이 PR이 말하는 구멍은 그 조합에서 나온다. InteractiveToken 태스크는 대화형 세션 안에서 프록시를 돌린다. 원격 데스크톱을 끊거나 세션이 끝나면 Windows가 그 세션의 프로세스를 같이 죽인다. 래퍼는 종료 코드 1073807364 ( 고치는 방향 자체는 맞다. 진짜 문제는 "이미 깔린 태스크를 새 정의로 어떻게 바꾸느냐"다. PR은
그런데 그래서 이 패치를 그대로 심으면 이렇게 된다. 이미 깔린 Windows 스케줄러는 전부 stale 이 된다. 업데이트와 repair 는 디스크 XML 만 새것으로 바꾸고 라이브 트리거는 예전 그대로다. 상태와 트레이는 막힌다. 실제 복구 트리거는 사용자가 다시 테스트 두 개는 XML 문자열이라 리눅스에서도 돈다. Windows-dispatch-only 가 아니라서 그 점은 좋다. 레거시 트리거 없음과 RemoteConnect 비활성은 건강 검사 실패를 잠근다. 빠진 것은 #432 처럼 Task Scheduler 가 세션 트리거의 src/service.ts windowsTaskRegistrationHealthy - 복구 트리거를 필수로 만들면 라이브 XML 이 곧바로 stale 이 된다. 지금 repair 와 ocx update 는 라이브 태스크를 다시 등록하지 않는다. 메인테이너의 판단이 필요한 지점
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In `@src/service.ts`:
- Around line 1801-1804: Add the resolved installing account as UserId to every
SessionStateChangeTrigger generated by the task XML template. Update
windowsTaskHasSessionRecoveryTriggers and windowsTaskRegistrationHealthy to
require and validate that same account scope, preserving existing trigger
checks.
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In `@src/service.ts`:
- Line 1814: Update buildWindowsTaskXml so sessionUserIdElement is emitted
before StateChange, preserving the Task Scheduler element order of UserId,
optional Delay, then StateChange. Add a Windows registration test that supplies
a non-empty account value and verifies the generated task registration succeeds.
- Line 1970: Update windowsTaskTriggerScopeAcceptable to detect and reject
namespaced or prefixed UserId elements before the optional UserId absence check,
so a present prefixed element cannot be treated as missing when the expected
identity is undefined. Add a regression test through
windowsTaskRegistrationHealthy covering a prefixed UserId belonging to another
account.
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The reconnect direction is valuable, and the latest head adds the missing live-task re-registration path, but exact head bb13c210d1cf742ab892cdef9dcbcfef5dd735a9 is not safe to install yet.
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buildWindowsTaskXmlemitsStateChangebeforeUserId. The Task Scheduler schema orders these children as optionalUserId, optionalDelay, then requiredStateChange; a scoped task can therefore be rejected byschtasks /createeven though the local string validator accepts it. EmitUserIdfirst and add a non-empty-user registration regression. -
windowsTaskTriggerScopeAcceptabledoes not reject prefixedUserIdelements. When the expected identity lookup is unavailable,taskXmlElementCountsees zero unprefixed elements and accepts a task that is actually scoped throught:UserIdto another account. Reject prefixed forms before treating the field as absent and cover this throughwindowsTaskRegistrationHealthy. -
repairServicestops the scheduler task before awaiting re-registration. If/create /fis rejected, elevation is cancelled, or staging/verification fails, the exception exits beforestartScheduler, leaving a previously runnable proxy stopped. Preserve availability with an explicit rollback/finally path that restarts the prior registration when replacement fails, and test both registration rejection and cancelled elevation.
The current lightweight checks are green, but the fork full CI has not run. Please fix these Windows lifecycle boundaries before asking a maintainer to approve the untrusted branch workflows.
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@Ingwannu Addressed the three Windows lifecycle boundaries on exact head
The investigation also exposed a test-isolation escape: the original repair unit test had partially injected dependencies and silently replaced the machine-global scheduler definition while passing. It now injects every external-manager dependency. The focused service suites pass 171/0, and the exact live task XML hash and real launcher action remained unchanged before/after the suite. Typecheck, privacy scan, and diff check are clean. |
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Inline comments:
In `@src/service.ts`:
- Around line 2593-2597: Remove the duplicate five-line comment immediately
following the existing task-stop failure-handling comment, preserving the single
original explanation and surrounding logic.
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Incremental re-review of exact head
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Approved exact head e2d9810332d8def8298661cf043c7c39bc90f2b2 after the focused local validation already recorded on the PR and the completed Windows-capable hosted checks. Service lifecycle run 33307313077 is green on windows-schtasks, macos-launchd, and linux-systemd; the Windows npm-global and keyring jobs are also green, React Doctor is green, and no review thread remains unresolved.\n\nThis is an implementation approval, not a merge signal. Cross-platform CI is still non-green because shard 2 hits the repository-wide release-version-line failure (package.json remains 2.36.0 after tag v2.36.0), and its macOS job is still in progress. Do not merge until the shared version line is repaired separately and the exact-head required CI is fully green. The owner review request also remains open.
Three Windows lifecycle boundaries on the session-recovery trigger path. sessionStateChangeTriggerType orders its children as optional UserId, optional Delay, then required StateChange. The builder emitted StateChange first, which the local string validator accepts but schtasks /create rejects, so a scoped install and the stale-task repair both failed on a real host while every unit test stayed green. windowsTaskTriggerScopeAcceptable treated a prefixed <t:UserId> as absent, because taskXmlElementCount only counts unprefixed tags. A task actually scoped to another account could therefore be reported healthy whenever the expected identity lookup was unavailable. Prefixed forms are now rejected before the optional-field check. repairService stops the task before replacing a stale definition. A rejected /create /f, a cancelled elevation, or a staging failure threw past startScheduler and left a previously runnable proxy stopped, which is worse than the stale registration the user started with. The failure path now restarts the still-registered definition and rethrows the original error; install state is not rewritten because no replacement happened.
A failed stale-task replacement can remove the attempt-owned registration during verification rollback. Starting whatever remains is therefore not enough: the previous live XML must be republished first. Capture the pre-repair registration, restore it from a private hardened stage on replacement failure, retry through the existing elevated registration path when needed, then restart it. Preserve the original replacement error when rollback succeeds, and aggregate rollback/restart failures when availability cannot be fully recovered. Also fully inject the repair dependencies in the original unit test. Its partial fake previously fell through to the machine-global Task Scheduler and replaced the real opencodex-proxy registration with a temporary test-home launcher while the test still passed.
The Windows scheduler task name is fixed per user, so any process can register it at any moment. The repair and fresh-install paths assumed the definition they inspected was still the definition they were acting on. Registration is now create-only unless the caller passes the exact predecessor XML it intends to replace. The precondition is checked before create and again immediately before elevation, and the elevated script re-queries schtasks and refuses to run /create /f when the live definition no longer matches. Only a base-healthy definition with no session triggers is treated as a refreshable legacy task; anything else is preserved for manual review instead of being overwritten. Repair now reads the registered XML before stopping the task, so an empty or unreadable query fails closed while the proxy is still running rather than after it has been stopped. After a successful replacement it reads the definition back and starts it only when it is healthy and owned by this attempt. Recovery from a failed replacement restarts the exact prior snapshot or an attempt-owned healthy residual, and leaves a healthy successor owned by another process registered but not started. The fresh install performs the same ownership readback between asset publication and the first run. Because those checks span UAC and asynchronous verification, mutating service subcommands hold a per-user SQLite write transaction for the whole operation, so a second process re-plans instead of racing. The lock is keyed on the effective user identity and runtime root rather than the environment, so the same SID cannot split it, and it lives outside OPENCODEX_HOME so it cannot make a fresh config root look pre-existing.
…ilure Three review follow-ups on the repair path. The pre-start readback treated an unreadable query as proof that the definition changed. The default read turns a failed schtasks query into an empty string, so a transient failure aborted after the task was already stopped and left a previously running proxy down. Only a readable definition that actually differs now blocks the restart. Repair judged the registration with the cached Windows identity alone, while the diagnostic path performs a bounded lookup. In a fresh process the cache is empty, so a task this same version wrote with a scoped UserId read as unhealthy, and the refreshable-legacy check also rejected it because it does carry session triggers. Repair then blamed a foreign definition for what was really an unresolved identity. It now resolves the account the same way the diagnostic does and, when the triggers name an account that still cannot be resolved, says so and points at re-running repair instead of naming the wrong cause. The mutation-lock suite also removed its temp directory immediately after a child exited, which can still see EBUSY on Windows while SQLite is unmapped. Cleanup now retries briefly rather than failing an otherwise green assertion.
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Lines 2440 to 2445 in 4cb008f
Retry the initial live-XML verification before rollback
On a fresh Windows scheduler install, Task Scheduler can report the new task as present while /query /xml is still transiently empty—the same publication lag handled by the settle loops elsewhere in this file. This branch immediately rolls back or leaves an unverifiable partial registration, so the later retry added in installFreshWindowsSchedulerSafely is never reached because registerFreshWindowsSchedulerTask throws before prepare(). Fresh evidence since the earlier unreadable-verification comment is this independent pre-prepare() single-read path; apply the bounded retry here too and add focused coverage for an empty/throwing first query followed by the attempt-owned XML.
AGENTS.md reference: src/AGENTS.md:L22-L25
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Re-approved on exact head 4cb008f after reviewing the delta from the previously approved head. The new pre-start verification retries only transient empty or throwing scheduler readback, rejects the first readable successor mismatch immediately, and applies the same bounded proof to fresh install and rollback restart paths. The shared 30-second principal ceiling is used only when an explicitly scoped task lacks a cached identity; unscoped diagnostics still avoid the lookup. Exact-head checks are fully green and no review thread remains unresolved.
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Summary
The Windows scheduler task runs under
InteractiveToken, so the proxy lives inside the interactive session and Windows tears it down when that session ends. The wrapper records the kill as exit code1073807364(STATUS_CONTROL_C_EXIT).LogonTriggerwas the only trigger, so there was no recovery path before the next interactive logon. Signing out of a Remote Desktop session therefore left the proxy down indefinitely.Measured on one machine's
service.log, correlating each kill with the next wrapper start: 19 such kills, of which 8 left the proxy down for more than six hours.Every kill timestamp lands within ten seconds of a Terminal Services logoff (event 23) in the same session.
This adds
SessionStateChangeTriggerentries forRemoteConnect,SessionUnlock, andConsoleConnect. They do not prevent the kill—that would require changingLogonTypeand its credential/GUI behavior—but restart the proxy at the next connection.MultipleInstancesPolicy=IgnoreNewalready makes re-entry safe.Existing-install and failure handling
windowsTaskRegistrationHealthynow requires the recovery triggers, so a legacy live registration becomes stale and the existing repair flow can replace it.The scheduler task name is fixed per user, so any process can register it at any moment. Review found that both repair and fresh install assumed the definition they inspected was still the definition they were acting on. The replacement path now preserves availability, refuses to touch anything it does not own, and avoids redundant elevation:
schtasksinside the elevated context and refuses/create /fwhen the live definition no longer matches.-Forceis no longer the default./run, both normal and failed-replacement recovery paths require an exact live XML match. Empty or failed queries get only a bounded 50/150/300/600 ms retry; a readable mismatch fails immediately, and persistent unreadability never starts the fixed-name task.OPENCODEX_HOMEso it cannot make a genuinely fresh config root look pre-existing.Verification
4cb008f677d9is based on the latestdev870a2adb6eac.bun test tests/service.test.tson Bun 1.4.0 passed 174 tests with 3 platform skips, 0 failures, and 585 assertions. The final fresh-install regressions cover an initially empty or throwing Scheduler XML read, bounded retry, acceptance of the attempt-owned registration, and no rollback; existing cases cover retry exhaustion, successor mismatch, rollback ordering, and nonce ownership.bun run typecheck,bun scripts/privacy-scan.ts, andgit diff --checkpassed on the exact head. Two independent current-diff reviews returned no actionable finding.Checklist
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New Features
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