Hack Day: Legend Semantic Model for Core TraderX Domain

[DovOps]

Summary

Introduce Legend as the semantic core model for TraderX domain contracts (Trade, Order, Position, Account, Instrument, ExecutionEvent).

Jump-Off State(s)

• Primary: 009-order-management-matcher
• Platform validation: 012-platform-convergence-c3

Graph Intent

canonical candidate

Scope

• Author canonical domain model in Legend.
• Map existing REST/event contracts to the Legend model.
• Generate and compare machine artifacts where feasible.

Acceptance Criteria

• Legend domain model covers core entities and lifecycle views.
• Contract comparison report identifies drift and mismatches.
• Integration plan preserves backward compatibility.

Decision Gate (Promote/Park)

Promote if Legend materially reduces contract drift and improves model governance.