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ADR-015: streams depth — carried-metadata keys, global-FIFO ordering, StreamEvent, trim_to (OQ-12 resolved)

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glm-5.3-flash committed 2026-10-05 14:15:28 +00:00
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docs/architecture/README.md
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@@ -24,9 +24,9 @@ pending architecture review and OQ resolution.
| Doc | Status | Purpose | Key OQs |
|---|---|---|---|
| [overview.md](overview.md) | draft | Crate family, feature surface, non-goals, evidence base | — |
| [core-contract.md](core-contract.md) | draft | The unified trait surface, delivery guarantees, tx seam | OQ-08, OQ-10, OQ-12 |
| [engine-sqlite.md](engine-sqlite.md) | draft | SQLite engine: forked-substrate/rusqlite mapping | OQ-06 (resolved), OQ-12 |
| [engine-postgres.md](engine-postgres.md) | draft | Postgres engine: tokio-postgres/LISTEN mapping | OQ-05 (resolved), OQ-08, OQ-12 |
| [core-contract.md](core-contract.md) | draft | The unified trait surface, delivery guarantees, tx seam | OQ-08, OQ-10 |
| [engine-sqlite.md](engine-sqlite.md) | draft | SQLite engine: forked-substrate/rusqlite mapping | OQ-06 (resolved), OQ-12 (resolved), OQ-13 (resolved) |
| [engine-postgres.md](engine-postgres.md) | draft | Postgres engine: tokio-postgres/LISTEN mapping | OQ-08, OQ-12 (resolved), OQ-13 (resolved) |
| [queues.md](queues.md) | draft | Queue/scheduler/outbox semantics depth (resolved: ADR-009/ADR-010) | OQ-06 (resolved) |
| [deployment.md](deployment.md) | draft | Host semantics, connection budgets, knobs, matrix | OQ-08 |
| [open-questions.md](open-questions.md) | draft | OQ tracker (promoted from OQ-ST register) | — |
@@ -49,6 +49,7 @@ pending architecture review and OQ resolution.
| [012](decisions/012-forked-substrate-design.md) | Forked substrate design — contract-blind boundary, fidelity posture, port deltas | Accepted |
| [013](decisions/013-fold-substrate-into-sqlite.md) | Fold the forked substrate into `alkstore-sqlite` — no fourth crate | Accepted |
| [014](decisions/014-outbox-tx-enqueue.md) | Transactional outbox enqueue — `outbox_enqueue_tx` on the `TxHandle` trait | Accepted |
| [015](decisions/015-streams-depth.md) | Streams depth — carried-metadata keys, global-FIFO ordering row, `StreamEvent` shape, `publish_with_key_tx`, `trim_to` | Accepted |
## Open Questions
@@ -57,10 +58,6 @@ Phase 0 register's OQ-ST-01..08 promote one-to-one — OQ-NN mirrors
OQ-ST-NN — with new Phase 1 questions appended after). Open, in
suggested resolution order:
- **OQ-12** (high): streams depth — key semantics, `StreamEvent`
shape, ordering guarantee row, retention (Phase 1 review find;
evidence gathered in the OQ; check consumer rows for a
per-key-ordering need before choosing among its options).
- **OQ-08** (medium): capability-surface shape.
- **OQ-10** (medium): contract versioning across engine crates.
- **OQ-11** (medium): forked-substrate follow-through (provenance
@@ -77,7 +74,8 @@ scheduler guarantee row pinned), ~~OQ-05~~ (queue semantics depth —
(honker-core quality read — fork fired,
[ADR-011](decisions/011-sqlite-substrate-fork.md)), ~~OQ-13~~
(transactional outbox enqueue shape —
[ADR-014](decisions/014-outbox-tx-enqueue.md)).
[ADR-014](decisions/014-outbox-tx-enqueue.md)), ~~OQ-12~~ (streams
depth — [ADR-015](decisions/015-streams-depth.md)).
No deferred OQs: all open questions are actionable Phase 1 work with
complete evidence bases.