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Design change: vibe_erp deliberately does NOT support multiple companies in one process. Each running instance serves exactly one company against an isolated Postgres database. Hosting many customers means provisioning many independent instances, not multiplexing them. Why: most ERP/EBC customers will not accept a SaaS where their data shares a database with other companies. The single-tenant-per-instance model is what the user actually wants the product to look like, and it dramatically simplifies the framework. What changed: - CLAUDE.md guardrail #5 rewritten from "multi-tenant from day one" to "single-tenant per instance, isolated database" - api.v1: removed TenantId value class entirely; removed tenantId from Entity, AuditedEntity, Principal, DomainEvent, RequestContext, TaskContext, IdentityApi.UserRef, Repository - platform-persistence: deleted TenantContext, HibernateTenantResolver, TenantAwareJpaTransactionManager, TenancyJpaConfiguration; removed @TenantId and tenant_id column from AuditedJpaEntity - platform-bootstrap: deleted TenantResolutionFilter; dropped vibeerp.instance.mode and default-tenant from properties; added vibeerp.instance.company-name; added VibeErpApplication @EnableJpaRepositories and @EntityScan so PBC repositories outside the main package are wired; added GlobalExceptionHandler that maps IllegalArgumentException → 400 and NoSuchElementException → 404 (RFC 7807 ProblemDetail) - pbc-identity: removed tenant_id from User, repository, controller, DTOs, IdentityApiAdapter; updated UserService duplicate-username message and the matching test - distribution: dropped multiTenancy=DISCRIMINATOR and tenant_identifier_resolver from application.yaml; configured Spring Boot mainClass on the springBoot extension (not just bootJar) so bootRun works - Liquibase: rewrote platform-init changelog to drop platform__tenant and the tenant_id columns on every metadata__* table; rewrote pbc-identity init to drop tenant_id columns, the (tenant_id, *) composite indexes, and the per-table RLS policies - IdentifiersTest replaced with Id<T> tests since the TenantId tests no longer apply Verified end-to-end against a real Postgres via docker-compose: POST /api/v1/identity/users → 201 Created GET /api/v1/identity/users → list works GET /api/v1/identity/users/X → fetch by id works POST duplicate username → 400 Bad Request (was 500) PATCH bogus id → 404 Not Found (was 500) PATCH alice → 200 OK DELETE alice → 204, alice now disabled All 18 unit tests pass.
