- ADR-014: the multi-round ack loop, grounded in duplex git 2.43.0 captures cross-checked against fetch-pack.c: no-done rounds get acknowledgments (ACK <oid> per recognized have, NAK when none, flush; never ready so FLUSH is always the terminator), the done round generates closure(wants) - closure(haves) with no cross-round server state (clients re-send wants + commons every round), wait-for-done stays (no capability change), want-less rounds answered empty, the ack check is a new GitPackGen::common_haves seam (honest boundary at the trait), budgets unchanged kinds - docs/research/negotiation-captures.md: the normative negotiation record (grammar, client behavior, malformed-section failure modes) - transport.md: fetch section rewritten to the decided loop; references updated - OQ-02 resolved Verification: cargo test / clippy -D warnings / fmt --check / doc pass
alkgit Research Index
Phase 0 (exploration) research. Feeds phase 1 (architecture).
| Doc | Topic | Status |
|---|---|---|
| vision.md | Vision, guiding principles, non-goals, phase-0 checklist | draft v2 (amended 2026-09-21) |
| gitoxide.md | gitoxide (gix) capability + version alignment | initial pass complete |
| alk-stack.md | alk stack fit, integration surface, gitea-lesson constraints | initial pass complete |
| git-protocol.md | Server-side git smart protocol inventory (what we own) | initial pass complete |
| reference-policy.md | Licenses, reference projects, reuse policy | complete |
| pocs.md | POC plan (what to validate before architecture commits) | planned |
| poc-1-findings.md | POC-1: pkt-line over alkcall BiStream (duplex producer) | complete — proceed |
| poc2-findings.md | POC-2: server-side pack generation (streaming pipeline) | complete — proceed |
| poc3-findings.md | POC-3: smart-http shape through alkhttp (stateless substrate) | complete — proceed |
| push-captures.md | Normative receive-pack (push) wire record (real git captures) | complete — ADR-013 basis |
| negotiation-captures.md | Normative V2 negotiation record (real git captures + source) | complete — ADR-014 basis |
Key findings so far
- gitoxide covers storage + pkt-line; the server half of the smart protocol is ours to write (gix-protocol/transport are client-side).
- Published gix 0.87.1 == local clone base; pin crates.io versions.
- alkcall
BiStreamis the natural substrate under pkt-line for both ssh and http paths. - The incompatible-license prior art confirms feasibility but contributes nothing; policy in reference-policy.md.
gixwithdefault-features = falserequires an explicit hash feature; workspace pinssha1with asha256passthrough feature everywhere.
Convergence criteria (phase 0 → phase 1)
Phase 0 is done when POC-1..3 have results and a recommended-approach
summary is written here (append below). Then the Architect produces
docs/architecture/ per sdd_process.
Convergence (2026-09-21): phase 0 gates all pass (POC-1/2/3 proceed).
Phase 1 opened with docs/architecture/; the structural decision is
ADR-010 — pure protocol crate following the alktty/alktunnels template
(the v1 "monorepo + alkgitd binary" framing in these research docs was an
init-agent artifact, amended in vision.md v2). POC-1 maps to the producer
half, POC-2 to the gix backend implementation, POC-3 to the stateless
substrate consumed by alkhttp's future git feature.