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Commits on Aug 19, 2026

  1. Serve the mock registries without awaiting mid-request 

    A request handler that awaits holds the request open on whatever it waits for,
and the client can only see that as a response that never arrives. zlib's async
form runs on the libuv threadpool, so a saturated pool did exactly that: a CI
run showed the npm mock at received=200 responded=199, one request unanswered
for the full 90s while every other origin drained clean.

Compress with gzipSync in handlers instead. That also makes memoizing a route's
buffer atomic, where check-then-await let two requests both miss the cache and
compress the same document twice.

RouteHandler now returns void, so a handler cannot reintroduce the await.

Co-Authored-By: Claude (Opus 5) <noreply@anthropic.com>
    @silverwind @claude
    silverwind and claude committed Aug 19, 2026
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