Doc 20 D-1 (legacy runtime deletion), first slice: races_test_noheal /
races_test_nosleepfix pinned behavior of the legacy handlesleep shim,
which is being deleted — the pins now assert properties of a runtime
that no longer exists. Drops the two Makefile.wasm link+inject variants
(SHIM_DISABLE_TRAMPOLINE_HEAL / SHIM_DISABLE_HANDLESLEEP), the
shim-redundancy pin specs in asyncify-races.spec.ts, and resolves the
tests/README.md open task. The green battery still runs every scenario
against the scheduler glue.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01TEHGiiXMShNXbBr7gSJ7iz
e7b8c2725b