[CI Failure] Flaky: VS Code extension e2eShardMatrix.test.js fails intermittently on Windows Extension host test runner

[github-actions]

Build Information

Build: https://github.com/microsoft/aspire/actions/runs/31554526779
Build error leg or test failing: Tests / Run VS Code extension unit tests (Windows) / extension/src/test/e2eShardMatrix.test.js (Extension host E2E test)
Pull request: #19125

Error Message

1 test failed. Extension host test runner error 1 test failed.
	at Context.<anonymous> (d:\a\aspire\aspire\extension\out\test\e2eShardMatrix.test.js:146:9)
	at process.processImmediate (node:internal/timers:504:21)
Exit code: 1

Description

Flaky: VS Code extension e2eShardMatrix.test.js fails intermittently on Windows Extension host test runner

Type: flaky-test

Occurrences

Date	Build	Job	PR
2026-08-12	31554526779	Tests / Run VS Code extension unit tests (Windows)	#19125
2026-08-12	31556534331	Tests / Run VS Code extension unit tests (Windows)	#19226
2026-08-12	31559266479	Tests / Run VS Code extension unit tests (Windows)	#19219

[adamint]

This was the same deterministic allowlist mismatch as #19270, not a flake. #19267 fixed it, and the current main extension unit suite passes. I consolidated the remaining E2E gate work and current-main investigation in #19282. Closing this as completed.