MOPC-App/docs/round-redesign-architecture-docs/mixed-round-design-implementation-docs/phase-02-backend-orchestration/overview.md

Phase 02 Overview: Backend Orchestration Engine

Objective

Implement deterministic runtime behavior for stage transitions, routing, filtering, assignment, live cursor control, and notification/audit emission.

In Scope

• transition engine
• routing engine
• filtering orchestration (gates + AI + manual queue)
• assignment orchestration with coverage guarantees
• live cursor and cohort window controls
• event and audit emission

Out of Scope

• full admin UI and participant UI implementation

Exit Criteria

1. Runtime contracts implemented and integration-tested.
2. Determinism and idempotency guarantees proven for critical mutations.
3. Mandatory phase gates complete with test evidence.