Unit type: Phase
Epic: lattice-platform-development (lattice-platform-agentic-development-v0.2.md)
Unit ID: phase-3
Status: Rolling-wave placeholder — see phase-3-status.md
Sketch: phase-3-sketch.md
Depends on: Phase 2 exit gate
Full VP-level expansion scheduled at: P2.11.4
Projections stay fresh, tanks respond, values flow back. Milestones M7 (projections live), M8 (tanks respond), M9 (write-back).
Authoritative slice-level detail: epic Part 7. Hard gate restated from the epic: no C-09 slice starts until C-07 reconciliation (P3.1.7) is green for a full week of nightly runs, injected-divergence scenario included.
docs/architecture (known now)| Document | Change | Producing slice |
|---|---|---|
docs/architecture/data-architecture.md |
Add valid-time cold partitioning and archive dataset conventions | P3.5.5 |
| Runbook: restore-from-backup / restore-from-bundle | New — place under docs/operator/ (existing home for operational runbooks, e.g. release-stack-reference.md), not a new top-level docs/runbooks/ |
P3.5.3 |
| Full doc table | Deferred | P2.11.4 |
| New subproject | Track |
|---|---|
platform/projection-engine |
C-07 |
platform/behaviour-engine |
C-09 |
platform/writeback |
C-10 |
solution-design-specification.md delta plan (known now)| SDS section | Change | Note |
|---|---|---|
| §7 Robustness Design | Add projection freshness contracts, aggregate lease/fencing, write-back conflict handling (never last-write-wins) | Full table at P2.11.4 |
| §5.1 Deployment Topology | Add role-profiled HA posture (≥2 control, ≥3 edge, partitioned behaviour with failover) | P3.5.1 |
Standard per epic Part 12.
Depends on Phase 2 exit gate. Blocks Phase 4 (maturity work measures against this phase’s benchmarks, per P3.6.1–P3.6.3).