Addresses review round 6 on #2099. Both nits were correct.
- The proxy-fetch sentinel used `as unknown as typeof fetch`, which AGENTS.md
forbids without justification — and none was needed here: an
`async () => new Response("")` satisfies the fetch signature directly, so it is
now annotated rather than asserted.
- The mock's comment still told readers to override `h.proxyFetchResult`, the
name from an earlier revision; the hook is `h.proxyFetchState.current`.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01JTHVxSu8AUgHRLvo1ntZ8H
Signed-off-by: cliffhall <cliff@futurescale.com>
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