[kzu]

Summary

• After a graceful close, record the processes the tool started and wait until they exit before the update starts the new build. Workers reparented by the OS are no longer left running.
• A descendant that is already stopping is given the stop timeout to finish. It is killed only if it is still alive when that wait ends.
• Cover the path with a simulated CodeAlta update, and an opt-in run against a Release build of CodeAlta (NDX_CODEALTA_E2E=1) that checks CODEALTA_AUTOMATED leads to ExitWhenIdle and exit code 0.

Test plan

• dotnet test --filter FullyQualifiedName~CodeAltaEvergreenTests
• NDX_CODEALTA_E2E=1 dotnet test --filter FullyQualifiedName~CodeAltaSourceEvergreenTests against the CodeAlta Release build: WM_CLOSE, log shows ExitWhenIdle, exit code 0, no alta process left
• CI on this pull request

[kzu]

🧪 Details on Ubuntu 26.04.1 LTS

from retest v1.1.0 on .NET 10.0.14 with 💜 by @devlooped