fix(server): ACP teardown tests pass on Windows hosts

[arslnysuf]

Fixes #17011.

Two teardown tests in AcpAdapterV2.test.ts fail on Windows hosts. Per the triage in #17011, both are test-only problems: the tests fake processGroupPlatform: "win32" while parts of the teardown path and fixtures depend on the real host platform.

Windows teardown is one-shot explicitly with independent finalizer cleanup
The scope finalizer is a separate effect from the one-shot explicit teardown and branches on the real host platform, so on Windows it runs taskkill a second time at scope close. The final assertion now expects 2 on win32 and 1 elsewhere, with a comment explaining why.

poisons the session when hard teardown defects and blocks replacement work
The test depends on POSIX bash/sleep fixtures, so it now returns early off-Linux like the other real-process fixture tests in this file. The PID-file wait is also bounded (30s via Effect.timeoutOption, matching the waitForProcesses idiom) so a missing fixture fails fast with a clear message instead of spinning into the 60s test timeout.

Verification

• Both tests pass on Windows 11 (vp test run … -t "Windows teardown is one-shot", -t "poisons the session"); each previously failed (assertion expected 2 to equal 1, 60s timeout).
• vp run --filter t3 typecheck: 0 errors.
• vp fmt --check on the touched file: clean.

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• apps/server/src/orchestration-v2/Adapters/AcpAdapterV2.test.ts

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📝 Walkthrough

Walkthrough

The teardown tests now account for host platform behavior. The wait for published process IDs now has a 30-second timeout.

Changes

Teardown test updates

Layer / File(s)	Summary
Platform-aware teardown test behavior apps/server/src/orchestration-v2/Adapters/AcpAdapterV2.test.ts	The Windows teardown test expects two taskkill calls on Windows hosts and one on other hosts. The hard-teardown test runs only on Linux. If process IDs are not published within 30 seconds, the test closes the session scope and fails with an assertion.

Priority: ➖ Normal

Estimated code review effort: 2 (Simple) | ~10 minutes

Change: Other · Severity of issue fixed: Medium

Merge Risk: ⚪ Minimal · up to fcd2e

This change only adjusts two tests so they behave correctly on Windows hosts. It does not alter product behavior, and no merge-blocking risk is apparent.

Architecture Summary

Architecture risk: 🔵 Low · up to e2406

The change affects 1 system.

Changed systems: apps/server

Architecture concerns
No architecture-level concerns identified.

Review details

Systems and components

• observed — apps/server (service) was modified; 1 changed file maps to changed impact.

Before / after behavior

• observed — Modified behavior in apps/server/src/orchestration-v2/Adapters/AcpAdapterV2.test.ts: The Windows teardown test records the real host platform and documents that finalizer behavior is based on it rather than the simulated process-group platform.
• observed — Modified behavior in apps/server/src/orchestration-v2/Adapters/AcpAdapterV2.test.ts: The test now expects two taskkill calls on Windows hosts and one on other hosts, instead of always expecting one.
• observed — Modified behavior in apps/server/src/orchestration-v2/Adapters/AcpAdapterV2.test.ts: The hard-teardown defect test now returns early on non-Linux hosts.
• observed — Modified behavior in apps/server/src/orchestration-v2/Adapters/AcpAdapterV2.test.ts: The test now waits up to 30 seconds for the command PID file to become nonempty and asserts if it times out before parsing the published PIDs; previously it waited without a timeout.

🚥 Pre-merge checks | ✅ 4

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and concisely describes the main change: fixing ACP teardown tests on Windows hosts. It uses an appropriate conventional commit format.
Description check	✅ Passed	The description explains the problem, the test-only changes, the linked issue, and focused verification results. It does not reproduce the template's separate "Problem", "Change", and "Scope and appro…
Linked Issues check	✅ Passed	The PR satisfies both coding objectives in issue #17011. In AcpAdapterV2.test.ts, the teardown test reads HostProcessPlatform and expects two taskkill calls on win32, and one call on other hos…
Out of Scope Changes check	✅ Passed	The whole-PR diff changes only apps/server/src/orchestration-v2/Adapters/AcpAdapterV2.test.ts. Each change addresses a failure named in issue #17011 or provides required cleanup and bounded waiting …

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• 🪄 Fix CodeRabbit comments on this PR

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Inline comments:
Review comments at
@apps/server/src/orchestration-v2/Adapters/AcpAdapterV2.test.ts:
- Around line 12716-12725: In the PID wait path, close the separately created
session scope before failing when `commandPidOption` is `None`. Update the
timeout branch around `commandPidOption` so `Scope.close` runs before
`assert.fail`, ensuring the Bash and sleep processes are cleaned up.

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