Files
alkgit/docs/architecture/README.md
T
glm-5.3-flash c4b9c53674 docs(architecture): ADR-015 — manage grant tier + repo-op gate, OQ-16 identity namespace
Resolves review 001 finding A-1 (critical): ADR-012 §3's "scope
git:admin OR ownership" gate is not expressible in alkcall's
AccessControl (AND-composition). Resolution is the review's option (a)
shape with the OR-term generalized: the per-repo grant action set gains
manage, authorize(record, identity, read|write|manage) becomes the
single policy function for git access and repo administration, and the
delete/update/get gate is admin scope OR manage grant (handler-side,
generic FORBIDDEN, unknown-repo = unauthorized per ADR-008). Repo
create seeds the creator's {read, write, manage} grants —
administration is grantable, so collaborators/bots/app-compiled roles
work without global scopes. Ownership stays as alkcall spawn-tracking
(mint at create unchanged); "ownership never implies git access" is
superseded.

- ADR-015 (new): manage grant tier, op gate, flat-grants-as-replication-
  substrate, opaque grant-key rule
- ADR-011: action set + policy domain amended, references updated
- ADR-012 §3: gate table replaced, two-tier paragraph superseded
- backend.md/doors.md/overview.md: gate + grant restatements, ADR tables
- OQ-16 (new, deferred(scope)): grant-key identity namespace —
  globally-comparable ids for cross-assembly/replicator grant state;
  tracker task tasks/architecture/oq-16-grant-identity-namespace.md
- review 001: A-1 marked resolved (ADR-015)
- vision.md: supersession notes (Internal-ops framing, v1 grant set)

Verification: cargo test, clippy -D warnings, fmt --check, doc --no-deps
all clean.
2026-09-26 11:50:25 +00:00

4.5 KiB

status, last_updated
status last_updated
draft 2026-09-25

alkgit Architecture

Phase 1 (SDD) output for alkgit — the git payload service of the alk family: a pure protocol crate on alkcall channels (the alk/git ALPN), following the alktty/alktunnels template (ADR-010). Phase 0 research lives in docs/research/; every design claim here traces to a POC finding or research doc, or is flagged as an open question.

Current State

Phase 1, architecture committed to the pure-protocol-crate shape (ADR-010; OQ-09 resolved). POC-1/2/3 validated the git protocol half end-to-end against real git 2.43. Previous cycles settled the auth/backend theme (ADR-011, ADR-012). This cycle settled the wire surface against real-client captures: the receive-pack push state machine (ADR-013, OQ-04) and the V2 multi-round negotiation ack loop (ADR-014, OQ-02). All wire-layer design is now capture-grounded; the remaining open questions are the publish-freeze timing (OQ-03, a release decision), sha256 policy (OQ-05, deferred on ecosystem need), and the grant-key identity namespace (OQ-16, deferred on the first cross-assembly deployment — blocks nothing in v1). ADR-015 resolved review 001's A-1 (the repo-op gate) with the manage grant tier.

Architecture Documents

Doc Area Status
overview.md Cross-cutting: crate shape, halves, security invariants draft
transport.md Wire layer: substrates, V2 state machines, upload/receive-pack draft
backend.md Backend traits + feature-gated gix implementation draft
doors.md Door mappings: alkhttp git feature, alkssh requirement, native path draft
open-questions.md Centralized OQ tracker —

ADRs

ADR Decision Status
001 Workspace crate decomposition (5 crates) Superseded (ADR-010)
002 Session boundary (identity, repo, stream, limits) Accepted
003 Protocol V2-first with honest capability advertisement Accepted
004 Pack pipeline (data::output gen / data::input ingestion) Accepted
005 Session substrate types (duplex + stateless APIs) Accepted
006 HTTP adapter composition (alkgit-owned router factory) Superseded (ADR-010)
007 ACL runs before any advertisement/ref line Accepted
008 Wire repo names are registry IDs, never paths Accepted
009 Bounded-resources budget model Accepted
010 Pure protocol crate (alktty/alktunnels template) Accepted
011 Per-repo authorization (grants in records, policy in core) Accepted
012 Registry backing, write surface, CRUD ops, feature split Accepted
013 receive-pack state machine (V0-framed push, thin-pack, unpack-first CAS) Accepted
014 V2 negotiation ack loop (no ready, wait-for-done stays) Accepted
015 Manage grant tier + repo-op gate (admin scope OR manage grant) Accepted

Open Questions

All unresolved questions are tracked in open-questions.md with stable OQ-IDs, priorities, and cross-references. Remaining: OQ-03 (publish freeze inventory — partially resolved, blocked on first-publish timing), OQ-05 (sha256, deferred on ecosystem need), and OQ-16 (grant-key identity namespace, deferred on the first cross-assembly record-sharing deployment). The wire-layer questions (OQ-02, OQ-04) resolved this cycle with ADR-014/ADR-013.

Document Lifecycle

Status Meaning Transitions
draft Under active development; may change significantly → reviewed when its OQs are resolved
reviewed Architecture final; implementation may begin; changes need review → stable when implementation verified
stable Locked; changes require review, may warrant an ADR → deprecated when superseded
deprecated Superseded; kept for reference Removed when no longer referenced