ADR-070 made Connection hold Box<dyn BidiStreamSource> so downstream crates can add connection shapes without editing core. The trait and three built-in impls landed, but the public constructor that lets a downstream crate construct a Connection from its own BidiStreamSource impl was never added — the source field is private with no from_source constructor. The channels POC update surfaced this when it tried to use the trait directly and found no way to build a Connection from a ChannelBidiStreamSource. This is a gap in the ADR-070 implementation, not a new decision. ADR-070 §Consequences says 'the channels crate implements ChannelBidiStreamSource in its own crate and constructs Connection from it' — the constructor for that path is what was missing. - ADR-070: add from_source to the Constructors table + reword the downstream-crates paragraph to make the two paths explicit (from_source for custom impls; from_quinn/from_iroh/from_stream for built-in impls) - core-types.md: add from_source to the impl Connection block, the built-in implementations table, and the design-decisions table entry - tasks/core/connection-from-source-constructor.md: the implementation task (one constructor + one test, scope narrow, risk low)
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 The previous implementation has been archived and a greenfield rebuild is in progress.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
- ALPN-as-service architecture — pivot proposal
- Cleanup plan — greenfield transition plan
- SDD process — spec-driven development process
- Research references — iroh, russh, russh-sftp deep dives
Reference implementation (previous architecture) is preserved at /workspace/@alkdev/alknet-main/.
License
Licensed under either of
- Apache License, Version 2.0 (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
- MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)
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.