- Lower default runner concurrency from `os.cpus().length` to `min(4, cpus)`.
The bottleneck in CI is shared resources (OAuth callback ports, global
filesystem like `~/.local/share/kilo`), not CPU, so eight parallel Bun
processes were triggering port/FS races instead of going faster.
- Raise per-test timeout from 30s to 60s. Slow `spawn` on Windows was
tripping the 30s limit on tests that were just slow, not broken
(e.g. `session/prompt.test.ts` at ~86s, `provider/provider.test.ts` at ~54s).
- Retry failing files once and surface them as FLAKY in the summary plus a
dedicated section. Bugs still fail on every attempt; contention recovers.
- Drop CI runners from 8vcpu to 4vcpu to match upstream OpenCode — with
concurrency capped at 4, the extra cores bought us nothing.
Catriel Müller
3d063eb47f