Jolymmiles/Xray-core v26.8.11 on GitHub

Highlights

Added opt-in H2MUX support with "protocol": "h2mux" for outbound sing-mux carriers and automatic inbound H2MUX detection.
Added opt-in TCP Brutal bandwidth negotiation through brutal-opts, shared by SMUX and H2MUX.
Retained the Linux-only release matrix with unpacked executables published alongside ZIP archives and digest files.

Implemented H2MUX independently on the existing authenticated carrier using HTTP/2 prior knowledge and one CONNECT exchange per logical stream.
Added bounded H2MUX stream lifecycle, cancellation, replay, TCP, UDP, padding, and carrier teardown handling.
Added strict Brutal rate parsing, bounded negotiation diagnostics, physical-connection publication, and Linux socket ABI checks.

Synchronized with upstream main through commit bc6e966a.
Updated github.com/cloudflare/circl to 1.6.5 and docker/login-action to 4.6.0.

Empty or omitted smux.protocol still selects SMUX; YAMUX remains unsupported.
Brutal is disabled unless explicitly enabled. Both configured rates must be at least 65,536 bytes per second.
Brutal runtime use requires the Linux brutal TCP congestion-control module. Negotiation or socket setup failure rejects the carrier instead of silently falling back.

Passed unit tests for common/singmux, common/mux, app/proxyman/outbound, and infra/conf.
Passed race tests and 50 consecutive sing-mux package runs.
Passed all 40 H2MUX real-process interoperability scenarios across Xray, sing-box, Mihomo, VLESS, Trojan, TCP, UDP, and padding on/off.
Cross-compiled the Linux/amd64 sing-mux test binary, including the Brutal ABI tests.
Built a static stripped Linux/amd64 release ELF; SHA-256: 665eb858321035e2d9d7beb4ff4222a64b9e2cf68e4b9768d2f9743e3ab09979.