Add implementation workplans and integration boundaries

workplans/USER-WP-0006-finalization-polish.md

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+---
+id: USER-WP-0006
+type: workplan
+title: "User Engine Implementation Assessment And Polish"
+domain: netkingdom
+repo: user-engine
+status: ready
+owner: codex
+topic_slug: netkingdom
+planning_priority: medium
+planning_order: 6
+created: "2026-05-22"
+updated: "2026-05-22"
+depends_on:
+  - USER-WP-0005
+state_hub_workstream_id: "8260c3ec-73cd-4c37-b15e-a856a01bbdfa"
+---
+
+# USER-WP-0006 - User Engine Implementation Assessment And Polish
+
+## Goal
+
+Assess the implementation against the PRD, architecture blueprint, interface
+guidance, and integrated scenarios. Finalize public contracts, documentation,
+operability, packaging, and UI handoff readiness.
+
+## Tasks
+
+```task
+id: USER-WP-0006-T1
+status: todo
+priority: high
+state_hub_task_id: "e0b5621a-4935-45a6-bbd0-41476b3d3317"
+```
+
+Review implemented behavior against the PRD, architecture blueprint, and
+interface guidance. Record gaps, accepted deviations, and follow-up work.
+
+```task
+id: USER-WP-0006-T2
+status: todo
+priority: high
+state_hub_task_id: "467eebf2-3a16-45b0-a5bd-28b5c1b634b1"
+```
+
+Verify user-engine has not absorbed identity provider, MFA, credential, PDP,
+UI, or deployment responsibilities.
+
+```task
+id: USER-WP-0006-T3
+status: todo
+priority: medium
+state_hub_task_id: "3b7efcaf-041d-4262-973d-6cfd2a011b47"
+```
+
+Stabilize endpoint names, error taxonomy, catalog schemas, projection
+responses, audit event shapes, and migration contracts.
+
+```task
+id: USER-WP-0006-T4
+status: todo
+priority: medium
+state_hub_task_id: "a0bc5469-6c6f-429a-a58e-2f6c6489f5c3"
+```
+
+Add readiness diagnostics, metrics, structured logs, audit correlation checks,
+outbox drain diagnostics, cache status, and runbooks.
+
+```task
+id: USER-WP-0006-T5
+status: todo
+priority: medium
+state_hub_task_id: "996ffd8d-5006-4393-8214-be8072ebae8e"
+```
+
+Finalize developer docs for standalone setup, application onboarding, catalog
+authoring, projection consumption, tenant boundaries, and event/audit
+integration.
+
+```task
+id: USER-WP-0006-T6
+status: todo
+priority: medium
+state_hub_task_id: "bc1ca685-be53-4f70-8717-7d7226c81944"
+```
+
+Decide versioning, packaging, build artifacts, SBOM/security scan
+requirements, migration policy, and compatibility guarantees.
+
+```task
+id: USER-WP-0006-T7
+status: todo
+priority: low
+state_hub_task_id: "7c4fa8b5-f6c4-434a-85e6-0048449fbdc8"
+```
+
+Prepare backend contracts and fixtures needed by future self-service and admin
+UI surfaces.
+
+## Acceptance Criteria
+
+- A final assessment records what was implemented, what changed, and what
+  remains open.
+- Public API, schema, catalog, and projection contracts are coherent.
+- Operability and release-readiness checks pass.
+- Future UI work has a clear backend contract.