user-engine/docs/final-assessment.md

Implementation Assessment

Implemented

• Headless service API for users, accounts, identity links, applications, catalogs, profiles, projections, audit records, and outbox events.
• Tenant context enforcement, tenant account state, memberships, tenant profile precedence, tenant diagnostics, and cross-tenant denial.
• Multi-application catalog ownership, namespace collision protection, semantic version checks, sensitivity downgrade prevention, app-filtered projections, and claims-enrichment projection caching.
• Scenario fixtures and conformance-style tests for positive and negative standalone, tenant, multi-app, redaction, audit, event, and cache paths.

Boundary Verification

User-engine does not issue tokens, verify MFA, store credentials, act as the policy decision point, own deployment, or provide a UI. It consumes verified claims through an identity adapter, asks authorization through a port, emits audit/outbox records, and exposes backend contracts for future UIs.

Accepted Deviations

• The first persistence adapter is in-memory. It carries schema and migration semantics but is not durable.
• The first API surface is in-process Python. HTTP/RPC transport adapters are still future work.
• Metrics and cache diagnostics are local snapshots, not platform telemetry.

Follow-Up Work

• Add a durable database adapter and migration tests.
• Add transport adapters with request/response contract tests.
• Add platform authorization, audit sink, secret provider, and outbox drain adapters.
• Add release automation for SBOM, package build, static checks, and deployment handoff.