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glm-5.1 f77b515968 docs(architecture): add Phase 0 architecture specs for ALPN-as-service model

Foundational architecture documents following the SDD process:

ADRs:
- 001: ALPN-based protocol dispatch (one endpoint, ALPN negotiation)
- 002: ProtocolHandler trait (replaces StreamInterface/MessageInterface)
- 003: Crate decomposition (one crate per handler, core provides shared infra)
- 004: Auth as shared core (IdentityProvider, hybrid resolution model)
- 005: irpc as call protocol foundation
- 006: ALPN string convention and connection model (alknet/ prefix, one ALPN per connection)

Docs:
- overview.md: crate graph, shared types, ALPN registry, failure modes
- README.md: index with doc table, ADR table, lifecycle definitions
- open-questions.md: 10 OQs across 7 themes (3 resolved, 7 open)

Crate spec stubs for all 11 planned crates (alknet-core through alknet CLI).

Key decisions resolved during self-review:
- AuthContext resolution is hybrid: endpoint resolves TLS-level auth,
  handlers resolve protocol-level auth (resolves OQ-02)
- ALPN is per-connection not per-stream, corrected ADR-001 (resolves OQ-06)
- ALPN naming uses alknet/ prefix without versions (resolves OQ-03)
- HandlerError return type on ProtocolHandler trait
- alknet/secret removed from ALPN registry until OQ-08 resolved

2026-06-15 22:14:58 +00:00

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status, last_updated

status	last_updated
planned	2026-06-15

alknet-sftp

Status: Planned — This spec has not been written yet.

Purpose

SFTP handler implementing ProtocolHandler on ALPN alknet/sftp. Provides russh-sftp protocol core with 26 packet types, custom serde codec, and pure data transformation. WASM-ready: only read_packet() couples to I/O.

References

overview.md
ADR-002: ProtocolHandler trait
russh-sftp reference: docs/research/references/ssh/russh-sftp/

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alknet-sftp

Purpose

References

512 B

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