You'll notice
Useful3 Signal2
A stream that never starts now gives a specific error with timings and a matchable code.
What's wrong with this entry?
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What
A stream that produces nothing within the first-byte window now raises a specific error rather than a generic timeout, and it carries the window length, how long was actually waited, and a stable error code you can match on.
Evidence
"No response from API within the first-byte window"
Strings lifted out of the shipped bundle, so the claim above can be checked against them.