Bisected the failure across four CI runs (job logs are not readable via the
Gitea API) down to the AiWorkspace test classes — 10 tests that pass on
Windows, in a clean Linux container, under a 1GB memory cap, in CI's exact
step order, with a custom-dir SDK and no DOTNET_ROOT, serially, and under a
hostile locale/timezone.
Ruled out: Linux behaviour, case sensitivity, path separators, locale/culture,
time zone, environment variables, parallel execution, test ordering, shared
state, memory. Not testable remotely: host permissions/limits.
Assessment is environmental: the workflow already documents three failure
modes on this same runner with an identical signature (processes dying with no
error output — SDK cache corruption, npm ci SIGSEGV, CRA build OOM/SIGSEGV).
Report includes evidence table and recommended infrastructure fix.
Removes the temporary bisection scaffolding; keeps the restore/build/test split
and the host smoke. No test was weakened, skipped, or filtered.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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