4.1.0's HTTP RPC for browsers capped at inline payloads (≤ 256 KiB).
4.2.0 unlocks streams: server queues outbound chunks + control
envelopes per peer, browser long-polls the queue. Browser-to-server
writes ride the existing /v1/transfer/<id>/chunk POST routes
unchanged.
For Dispatch this unlocks mod-jar uploads (50 MB) and world-backup
downloads (100+ MB) — the actual reason browser-side @shade/files
matters.
### New API
@shade/sdk:
- shade.transferQueueRoute(opts?) — Hono app with /queue +
/v1/transfer/* routes. Auto-configures the queue transport.
- shade.configureTransfers extended: transport + envelopeTransport
override slots; resolveBaseUrl optional when both supplied.
@shade/transfer:
- OutboundQueue — per-peer monotonic event log with long-poll
semantics, idle-eviction GC, ring-buffered to maxEventsPerPeer.
- QueueTransferTransport — enqueues instead of POSTing.
@shade/files:
- httpClient({ outboundQueueUrl, transferBaseUrl }) — when set,
starts a long-poll drainer + builds a streams-bridge. fs.read /
fs.write of >256 KiB work end-to-end.
- startQueueDrainer(shade, opts) — exported helper for advanced
consumers driving their own drainer.
### Implementation notes
- ClientStreamsBridge's TransformStream had HWM=0 by default which
stalled the drainer's await chain at chunk 4 (writer.write pended
before the consumer's reader was attached). Bumped to HWM=64 so
the receive loop can buffer ahead of the consumer.
### Tests
3 new integration tests in tests/integration/http-rpc-streams.test.ts:
4 MiB streamed read round-trip, inline-only error path, idle-timeout
long-poll behaviour.
Wire-compatible. Source-compatible. Lockstep bump to 4.2.0.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Sterister
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