Files
alknet/docs/architecture/crates/core
glm-5.2 f224ea998c docs(arch): ADR-030..033 — repo/adapter pattern, PeerEntry, CredentialStore, forwarded-for
Land the storage and auth strategy research (findings.md) as four
accepted ADRs and amend the core and call specs to match:

- ADR-030: PeerEntry and Identity.id decoupling. Replaces
  authorized_fingerprints with peers: Vec<PeerEntry>; Identity.id becomes
  the stable peer_id, decoupled from the rotating fingerprint. Supersedes
  ADR-029 Assumption 1's UUID source (one-way door preserved, source
  changes). Resolves OQ-33 and the storage-boundary half of OQ-34. Records
  the API-key asymmetry as deliberate (OQ-35).

- ADR-031: CredentialStore repo trait + InMemoryCredentialStore default
  adapter in core. Second repo trait alongside IdentityProvider. Vault
  encrypts; the store persists the EncryptedData blob; assembly layer
  loads into Capabilities. EncryptedData core mirror includes salt for
  wire-format compat.

- ADR-032: Forwarded-for identity. forwarded_for field on call.requested
  and OperationContext — metadata only, never read by AccessControl::check
  (enforced structurally via the check signature). The from_call handler
  populates it. Wire-format one-way door, folded into the ADR-029
  migration window.

- ADR-033: Storage boundary and repo/adapter pattern. Core defines repo
  traits + in-memory defaults; persistence adapters are separate crates;
  assembly layer wires. Resolves OQ-34. Concrete adapter shapes deferred
  for exploration (OQ-36).

Amends auth.md, config.md, operation-registry.md, client-and-adapters.md,
open-questions.md, README.md, crates/core/README.md. Marks ADR-029
Accepted (Assumption 1 carries the ADR-030 superseded note). Marks the
research findings doc reviewed.
2026-06-27 12:12:25 +00:00
..

status, last_updated
status last_updated
draft 2026-06-27

alknet-core

Core library for ALPN-based protocol dispatch. Every handler crate depends on alknet-core.

Documents

Document Status Description
core-types.md draft ProtocolHandler trait, HandlerError, Connection, BiStream, StreamError
endpoint.md draft ALPN router, HandlerRegistry, accept loop, graceful shutdown
auth.md draft AuthContext, Identity, IdentityProvider, AuthToken, resolution flow, PeerEntry, CredentialStore
config.md draft StaticConfig, DynamicConfig, ArcSwap, ConfigReloadHandle, AuthPolicy.peers

Applicable ADRs

ADR Title Relevance
001 ALPN-Based Protocol Dispatch Core architectural model
002 ProtocolHandler Trait The trait every handler implements
003 Crate Decomposition alknet-core's position in the crate graph
004 Auth as Shared Core IdentityProvider in core
006 ALPN String Convention ALPN format, one-ALPN-per-connection
007 BiStream Type Definition Connection, BiStream trait, SendStream, RecvStream
009 One-Way Door Framework Decision classification
010 ALPN Router and Endpoint Endpoint, HandlerRegistry, accept loop
011 AuthContext Structure AuthContext fields and resolution flow
015 Privilege Model and Authority Context Per-request identity on OperationContext; admin scope for config reload
030 PeerEntry and Identity.id Decoupling authorized_fingerprintspeers: Vec<PeerEntry>; Identity.id = peer_id (stable)
031 CredentialStore Repo Trait Second repo trait in core; InMemoryCredentialStore default adapter
033 Storage Boundary and Repo/Adapter Pattern Core defines traits + in-memory defaults; persistence adapters are separate crates

Relevant Open Questions

OQ Title Status Relevance
OQ-04 Dynamic handler registration resolved (start static) HandlerRegistry is immutable at startup
OQ-05 Multi-connectivity endpoint resolved (quinn + iroh) AlknetEndpoint supports both, both feature-gated
OQ-11 Handler-level auth resolution observability resolved Handlers store resolved identity on Connection; two identity scopes (connection-level for observability, per-request for ACL)
OQ-33 PeerId — logical id vs crypto identity resolved by ADR-030 PeerId = Identity.id = PeerEntry.peer_id (stable across key rotation)
OQ-34 Persistent peer registry (storage boundary) resolved by ADR-030+031+033 Core defines repo traits + in-memory defaults; persistence adapters are separate crates
OQ-35 API key identity vs peer identity resolved (recorded by ADR-030) The asymmetry between fingerprint and API-key paths is deliberate
OQ-36 Concrete adapter shapes open (deferred for exploration) The repo/adapter pattern is committed (ADR-033); concrete adapter shapes are not

Key Design Principles

  1. One trait, one dispatch point: ProtocolHandler is the only abstraction handlers implement. No StreamInterface/MessageInterface split.
  2. ALPN does the routing: The endpoint dispatches by ALPN string. No byte-peeking, no ListenerConfig enum.
  3. Handlers own their wire format: Each handler manages its own protocol parsing. alknet-core provides the Connection, not the framing.
  4. Auth is hybrid: The endpoint provides what it can (TLS-level auth). Handlers complete what they need. AuthContext may be partial.
  5. WASM door preserved: BiStream is a trait, Connection is an opaque type. Core types don't assume tokio or quinn in public APIs.