---
id: NK-WP-0019
type: workplan
title: "User Engine Implementation Assessment And Polish"
domain: netkingdom
repo: net-kingdom
status: ready
owner: codex
topic_slug: netkingdom
planning_priority: medium
planning_order: 19
created: "2026-05-22"
updated: "2026-05-22"
depends_on:
  - NK-WP-0018
state_hub_workstream_id: "d2daa8b4-8ecf-4377-b382-492e653735f7"
---

# NK-WP-0019 - User Engine Implementation Assessment And Polish

## Goal

Assess the implemented user-engine against its PRD, architecture blueprint,
NetKingdom boundary contracts, and integrated test scenarios. Finalize
documentation, operational readiness, release packaging, and handoff criteria
for future `user-account` and `user-manager` UI work.

## Scope

In scope:

- implementation review against PRD and blueprint;
- boundary review against NetKingdom IAM Profile, flex-auth, key-cape,
  Keycloak, OpenBao, and Railiance responsibilities;
- API/schema polish;
- operability and documentation polish;
- release readiness;
- State Hub and responsibility-map reconciliation;
- UI handoff readiness.

Out of scope:

- building user-account or user-manager UIs;
- adding new major product capabilities;
- enterprise provisioning beyond documented adapter boundaries.

## Tasks

```task
id: NK-WP-0019-T1
status: todo
priority: high
state_hub_task_id: "116b5362-ebbf-4d21-83e8-bbc82e80a71a"
```

**Implementation assessment.** Review implemented behavior against
`INTENT.md`, the PRD, the architecture blueprint, the architecture review,
and NK-WP-0014 boundary contracts. Record gaps, accepted deviations, and
follow-up work.

```task
id: NK-WP-0019-T2
status: todo
priority: high
state_hub_task_id: "08bd8ca3-dd7e-41c9-b8d2-c9b7c72ceb0a"
```

**Boundary and responsibility review.** Verify that user-engine has not
absorbed identity provider, MFA, credential, PDP, UI, or deployment
responsibilities. Update NetKingdom responsibility-map classification if
user-engine is now a shared platform service holding NetKingdom-orchestrated
resources.

```task
id: NK-WP-0019-T3
status: todo
priority: medium
state_hub_task_id: "b8ff89a1-cdfb-445a-ae4d-ca4fd4a455eb"
```

**API and schema polish.** Stabilize endpoint names, error taxonomy, catalog
descriptor schemas, projection responses, audit event shapes, and migration
contracts. Remove accidental implementation details from public contracts.

```task
id: NK-WP-0019-T4
status: todo
priority: medium
state_hub_task_id: "f57d87d7-fdc8-485c-ba93-86c5a8342f04"
```

**Operability polish.** Add readiness diagnostics, metrics, structured logs,
audit correlation checks, outbox drain diagnostics, cache status, and
runbooks for common failure modes.

```task
id: NK-WP-0019-T5
status: todo
priority: medium
state_hub_task_id: "42a01f4e-c646-4551-bd94-e122c9c16226"
```

**Documentation and examples.** Finalize developer docs for standalone setup,
application onboarding, catalog authoring, projection consumption, tenant
administration boundaries, and event/audit integration.

```task
id: NK-WP-0019-T6
status: todo
priority: medium
state_hub_task_id: "7838d62b-94eb-437a-8418-7a900cde9716"
```

**Release readiness.** Decide versioning, packaging, image/build artifacts,
SBOM/security scan requirements, migration policy, and compatibility
guarantees for future consumers.

```task
id: NK-WP-0019-T7
status: todo
priority: low
state_hub_task_id: "19569b30-c8df-441a-b815-c9217a82abaf"
```

**UI handoff readiness.** Produce the API, projection, catalog metadata, and
test fixtures needed for future user-account and user-manager repos to start
without inventing separate backends.

## Acceptance Criteria

- A final assessment document records what was implemented, what changed, and
  what remains open.
- Public API/schema/catalog/projection contracts are coherent and documented.
- Operability and release-readiness checks pass.
- NetKingdom State Hub and responsibility-map records are reconciled.
- Future UI work has a clear backend contract.

## Dependencies And Sequencing

- Depends on NK-WP-0018 integrated scenario tests.
- Closes the initial user-engine implementation program and feeds future UI
  workplans.