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3.0.0-alpha.6 (2026-06-24)

Features

• body: implement BodyPumpBase with credit system and adaptive budget (bc18b6a)
• body: unseal BodyDrainSlot, add FlowControlledDrainSlot (415b81d)
• body: update IBodyDrainTarget interface and remove DrainContinue (9919a88)
• body: wire OnOutboundFlushed → AddCredit across all protocols (4b80d6a)
• client: forward 1xx informational responses to caller (0f4627e)
• h1-server: add chunked trailer section encoding to ChunkedFramingHelper (da0b1ba)
• h1-server: integrate trailer emission into Http11ServerStateMachine (c175b18)
• h1-server: support 1xx informational responses via SendInformational (ae4aa17)
• h2-server: support 1xx informational responses (a104f9c)
• h2: add Reserve/Refund to FlowController for window reservation (e395b09)
• h3-server: add EncodeTrailers to Http3ServerEncoder (ba7d586)
• h3-server: integrate trailer emission into Http3ServerSessionManager (8a50fd2)
• h3-server: support 1xx informational responses (9b4caab)
• Improve HTTP trailers and informational responses (816cbf7)
• Rename TurboResponseHeaderDictionary to TurboHeaderDictionary (b69079d)
• server: add IHttpRequestTrailersFeature support (f3fca70)
• server: add SetReadOnly freeze semantics to TurboResponseHeaderDictionary (366de03)
• server: add TurboInformationalResponseFeature for 1xx responses (985ee8e)
• server: auto-send 100 Continue for Expect: 100-continue requests (0b0c00f)

Bug Fixes

• body: add inline AddCredit to all EmitDataFrames implementations (f52824b)
• body: fix Cancel stale-id leak and document IsStreamEligible contract (92524fc)
• body: fix pump stall on async PipeReader streams (71df2e2)
• body: prevent double slot cleanup on drain complete + fix test (5e09c43)
• body: reclaim credit after synchronous read completion (26368c1)
• body: restore client-side backpressure and remove sync credit reclaim (85fcb87)
• client: add MaxConcurrentStreams defense-in-depth warning in H2/H3 EncodeRequest (98b9ac7)
• client: dispose response when PendingRequest version has advanced (d476f97)
• client: revert response dispose — BroadcastHub shares objects (4cc2306)
• cookies: enforce __Host- and __Secure- prefix rules (RFC 6265bis) (9abed3a)
• h1-client: consume 101 in 1xx block instead of delivering as final response (4f7a0d8)
• h1-client: exclude 101 Switching Protocols from 1xx forwarding (2541222)
• h2-server: prevent stream hang when all trailers are filtered + add SetReadOnly freeze (4455ac8)
• h2/h3: guard StackStreamStatePool against double-return (abba72d)
• h2: fix FlowControlledBodyPump OnWindowUpdate deadlock + window leak (dff4cec)
• h3-client: handle 1xx informational responses without closing stream (68423e5)
• h3-client: update edge-case tests for 1xx behavior + status validation (a3af20b)
• quic: only flush streams that actually wrote to the pipe (not opening-buffer) (01fcde9)
• quic: return pooled MultiplexedData after write + treat QuicException as graceful close (5af56a5)
• server: cap _pendingSources queue in GroupByRequestEndpointStage (c44a6fe)
• test: tighten Trailer announcement header assertion in Http11ServerTrailerSpec (e482e5c)
• test: update H1.1 stage test for 1xx forwarding behavior (fea9d9d)
• test: update Http3ServerTrailerSpec to use MultiplexedData.Rent() (af9f6ca)
• test: update starvation guard tests after removal (105307f)

Performance

• h3: batch DATA frames into single TransportBuffer (match H2 pattern) (c8d88fc)
• h3: eliminate timer key strings, skip LinkedCTS, deduplicate correlation map (44a492c)
• h3: pool MultiplexedData like TransportData (ObjectPool<256>) (39f3e86)
• quic: adaptive read buffer 4KB-128KB for QUIC direct reads (5d9642c)
• quic: cache read failure/success lambdas and body pump delegates (550254f)
• quic: defer PipeWriter flush until batch complete (write coalescing) (508a27d)
• quic: pool QuicStreamState objects (ObjectPool<256>) (4951b73)

Refactoring

• body: rewrite FlowControlledBodyPump on BodyPumpBase (66e024e)
• body: rewrite MultiplexedBodyPump on BodyPumpBase (1f07721)
• body: rewrite SerialBodyPump on BodyPumpBase (338c467)
• body: simplify pump architecture (0f1523b)

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