glm-5.2 f8d4650dce docs(adr): 092 — BiStream as the handler leaf, unify split-pair accept_bi
The crate-extraction findings Phase 6 deferred the alknet-http rework
on the grounds that the QuicStream wrapper (44 lines) is a necessary
adapter. The finding was right about the symptom, wrong about the
cause: the root is that the leaf type is split, so every consumer
re-joins or bypasses. Five abstractions exist for one concept
(BiStream trait vestigial in code, Connection, SendStream/RecvStream,
WsStream, MpscSendStream/MpscRecvStream).

ADR-092 resurrects ADR-007's BiStream as a concrete newtype leaf
(the bounds survive, the trait becomes a concrete struct for
Pin<&mut Self> projection), moves the join into core's quinn/iroh
BidiStreamSource impls once, and removes the per-handler wrappers:

- HttpAdapter::handle drops QuicStream (44 lines) and QuicStreamDuplex
  (38 lines); serve_io is unchanged.
- WebSocket runs through Connection::from_bidi + the call-protocol
  handler. WsBidiStream (~50-80 lines) implements AsyncRead/AsyncWrite
  over axum WS binary messages. WsStream trait, drive_ws_session loop,
  and ~150 lines of dispatch glue removed. ADR-044/048's 'WS message
  stream is BiStream-satisfying' becomes literal.
- Tunnel/SSH handlers call tokio::io::split(bidi) for their two pumps
  (same stdlib idiom as TcpStream/TlsStream). ADR-078 preserved.
- SendStream/RecvStream collapse to thin newtypes (quinn enum dispatch
  gone); retained for ADR-074 into_sub_streams() and channels
  reassembly (ADR-071 unidirectional sub-streams).
- 'VPN-like without being a VPN' over WS in v1 becomes real: the
  webtransport.md path, over WS, now. WASM SSH parser implements
  BiStream over a WS-message adapter on the browser side.
- WebTransport h3 extraction recorded as a future channels-variant
  move enabled by the unification (out of scope per ADR-044).

Amends ADR-065 (from_bidi primary, from_stream escape hatch),
ADR-070 (accept_bi returns BiStream), ADR-074
(ChannelBidiStreamSource::accept_bi returns BiStream; into_sub_streams
unchanged). ADR-077 two-mode TTY design preserved. Resolves the
findings.md Phase 6 deferral.

Three open questions recorded with defaults (WsBidiStream home,
SendStream/RecvStream long-term home, from_stream vs from_bidi
primacy) — none blocking.
2026-07-18 03:09:38 +00:00

Alknet

Status: Pre-alpha — This project is undergoing a major architectural pivot to an ALPN-as-service model. The previous implementation has been archived and a greenfield rebuild is in progress.

A self-hostable networking toolkit built on QUIC+TLS with ALPN-based protocol dispatch. Each protocol handler (SSH, SFTP, Git, HTTP, DNS, messaging, call protocol) registers an ALPN string on a shared endpoint. The ALPN negotiation during the TLS/QUIC handshake routes connections to the correct handler before any application bytes are read.

Core Insight

A service IS an ALPN. One endpoint, one port, many protocols — dispatched by the TLS handshake, not by application-level peeking or separate listeners.

Crates

Crate Status Description
alknet-vault stable Local key vault: BIP39/SLIP-0010/AES-GCM key derivation and encryption
alknet-core planned ProtocolHandler trait, ALPN router, auth/identity, config
alknet-ssh planned SSH handler (russh), SOCKS5, port forwarding
alknet-call planned JSON-RPC call protocol (EventEnvelope framing)
alknet-fs planned Content-addressed file storage (iroh-blobs backend)
alknet-sftp planned SFTP handler (russh-sftp protocol core)
alknet-git planned Git smart protocol handler (gix)
alknet-http planned HTTP handler (axum, REST API, MCP)
alknet-dns planned DNS handler (hickory-proto, pkarr)
alknet-msg planned E2E encrypted messaging, mixnet support
alknet planned CLI binary (assembles and registers handlers)

Documentation

Reference implementation (previous architecture) is preserved at /workspace/@alkdev/alknet-main/.

License

Licensed under either of

at your option.

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in this work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.

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