Add the foundational types for ADR-049 streaming handlers: - StreamingHandler, ResponseStream type aliases and HandlerKind enum (Once | Stream) in registration.rs, with make_streaming_handler() helper - CallError::invalid_operation_type() in wire.rs (sixth protocol code, retryable: false) - HandlerRegistration.handler flipped from Handler to HandlerKind; HandlerRegistration::new() now takes HandlerKind - OperationRegistryBuilder absorbs wrapping: with_local/with_leaf/ with_leaf_provenance wrap raw Handler in HandlerKind::Once for Query/Mutation; new with_local_streaming/with_leaf_streaming take a StreamingHandler and wrap in HandlerKind::Stream for Subscription. Builder validates kind matches spec.op_type (mismatch = startup error) - OperationRegistry::register() returns Result<(), String> with a clear mismatch message; all call sites updated to handle the Result - invoke() matches on HandlerKind: Once -> existing path; Stream -> INVALID_OPERATION_TYPE error envelope (guards against silent truncation; invoke_streaming() added in a downstream task) - OverlayOperationEnv::invoke_with_policy matches on HandlerKind: Once -> dispatch; Stream -> INVALID_OPERATION_TYPE (composition is request/response-only) - Migrated every HandlerRegistration::new() construction site (~95) to wrap raw Handler in HandlerKind::Once(handler); the builder sites are handled by the builder-absorbs-wrapping change - Updated two websocket subscription tests that relied on Subscription ops dispatching via invoke() to expect INVALID_OPERATION_TYPE - Added unit tests for invoke/register validation and make_streaming_handler
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 The previous implementation has been archived and a greenfield rebuild is in progress.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.