Two additions from loops/hs needed for the new WebSocket socket tests:
- unhandledRejection suppressor — synchronous test harness doesn't await RPC promises
- Fake setTimeout/clearTimeout + __hsFlushTimers — drain RPC timeout tests synchronously
Plan update: mark E36 WebSocket as DONE (previously "design-done, pending review").
Skipped: loops/hs's tests/playwright/generate-sx-tests.py — architecture's version
is 1468 lines vs loops/hs's 290; arch's is the further-evolved version.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
giles
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