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The reference printing-shop plug-in graduates from "hello world" to a real customer demonstration: it now ships its own Liquibase changelog, owns its own database tables, and exposes a real domain (plates and ink recipes) via REST that goes through `context.jdbc` — a new typed-SQL surface in api.v1 — without ever touching Spring's `JdbcTemplate` or any other host internal type. A bytecode linter that runs before plug-in start refuses to load any plug-in that tries to import `org.vibeerp.platform.*` or `org.vibeerp.pbc.*` classes. What landed: * api.v1 (additive, binary-compatible): - PluginJdbc — typed SQL access with named parameters. Methods: query, queryForObject, update, inTransaction. No Spring imports leaked. Forces plug-ins to use named params (no positional ?). - PluginRow — typed nullable accessors over a single result row: string, int, long, uuid, bool, instant, bigDecimal. Hides java.sql.ResultSet entirely. - PluginContext.jdbc getter with default impl that throws UnsupportedOperationException so older builds remain binary compatible per the api.v1 stability rules. * platform-plugins — three new sub-packages: - jdbc/DefaultPluginJdbc backed by Spring's NamedParameterJdbcTemplate. ResultSetPluginRow translates each accessor through ResultSet.wasNull() so SQL NULL round-trips as Kotlin null instead of the JDBC defaults (0 for int, false for bool, etc. — bug factories). - jdbc/PluginJdbcConfiguration provides one shared PluginJdbc bean for the whole process. Per-plugin isolation lands later. - migration/PluginLiquibaseRunner looks for META-INF/vibe-erp/db/changelog.xml inside the plug-in JAR via the PF4J classloader and applies it via Liquibase against the host's shared DataSource. The unique META-INF path matters: plug-ins also see the host's parent classpath, where the host's own db/changelog/master.xml lives, and a collision causes Liquibase ChangeLogParseException at install time. - lint/PluginLinter walks every .class entry in the plug-in JAR via java.util.jar.JarFile + ASM ClassReader, visits every type/ method/field/instruction reference, rejects on any reference to `org/vibeerp/platform/` or `org/vibeerp/pbc/` packages. * VibeErpPluginManager lifecycle is now load → lint → migrate → start: - lint runs immediately after PF4J's loadPlugins(); rejected plug-ins are unloaded with a per-violation error log and never get to run any code - migrate runs the plug-in's own Liquibase changelog; failure means the plug-in is loaded but skipped (loud warning, framework boots fine) - then PF4J's startPlugins() runs the no-arg start - then we walk loaded plug-ins and call vibe_erp's start(context) with a fully-wired DefaultPluginContext (logger + endpoints + eventBus + jdbc). The plug-in's tables are guaranteed to exist by the time its lambdas run. * DefaultPluginContext.jdbc is no longer a stub. Plug-ins inject the shared PluginJdbc and use it to talk to their own tables. * Reference plug-in (PrintingShopPlugin): - Ships META-INF/vibe-erp/db/changelog.xml with two changesets: plugin_printingshop__plate (id, code, name, width_mm, height_mm, status) and plugin_printingshop__ink_recipe (id, code, name, cmyk_c/m/y/k). - Now registers seven endpoints: GET /ping — health GET /echo/{name} — path variable demo GET /plates — list GET /plates/{id} — fetch POST /plates — create (with race-conditiony existence check before INSERT, since plug-ins can't import Spring's DataAccessException) GET /inks POST /inks - All CRUD lambdas use context.jdbc with named parameters. The plug-in still imports nothing from org.springframework.* in its own code (it does reach the host's Jackson via reflection for JSON parsing — a deliberate v0.6 shortcut documented inline). Tests: 5 new PluginLinterTest cases use ASM ClassWriter to synthesize in-memory plug-in JARs (clean class, forbidden platform ref, forbidden pbc ref, allowed api.v1 ref, multiple violations) and a mocked PluginWrapper to avoid touching the real PF4J loader. Total now **81 unit tests** across 10 modules, all green. End-to-end smoke test against fresh Postgres with the plug-in loaded (every assertion green): Boot logs: PluginLiquibaseRunner: plug-in 'printing-shop' has changelog.xml Liquibase: ChangeSet printingshop-init-001 ran successfully Liquibase: ChangeSet printingshop-init-002 ran successfully Liquibase migrations applied successfully plugin.printing-shop: registered 7 endpoints HTTP smoke: \dt plugin_printingshop* → both tables exist GET /api/v1/plugins/printing-shop/plates → [] POST plate A4 → 201 + UUID POST plate A3 → 201 + UUID POST duplicate A4 → 409 + clear msg GET plates → 2 rows GET /plates/{id} → A4 details psql verifies both rows in plugin_printingshop__plate POST ink CYAN → 201 POST ink MAGENTA → 201 GET inks → 2 inks with nested CMYK GET /ping → 200 (existing endpoint) GET /api/v1/catalog/uoms → 15 UoMs (no regression) GET /api/v1/identity/users → 1 user (no regression) Bug encountered and fixed during the smoke test: • The plug-in initially shipped its changelog at db/changelog/master.xml, which collides with the HOST's db/changelog/master.xml. The plug-in classloader does parent-first lookup (PF4J default), so Liquibase's ClassLoaderResourceAccessor found BOTH files and threw ChangeLogParseException ("Found 2 files with the path"). Fixed by moving the plug-in changelog to META-INF/vibe-erp/db/changelog.xml, a path the host never uses, and updating PluginLiquibaseRunner. The unique META-INF prefix is now part of the documented plug-in convention. What is explicitly NOT in this chunk (deferred): • Per-plugin Spring child contexts — plug-ins still instantiate via PF4J's classloader without their own Spring beans • Per-plugin datasource isolation — one shared host pool today • Plug-in changelog table-prefix linter — convention only, runtime enforcement comes later • Rollback on plug-in uninstall — uninstall is operator-confirmed and rare; running dropAll() during stop() would lose data on accidental restart • Subscription auto-scoping on plug-in stop — plug-ins still close their own subscriptions in stop() • Real customer-grade JSON parsing in plug-in lambdas — the v0.6 reference plug-in uses reflection to find the host's Jackson; a real plug-in author would ship their own JSON library or use a future api.v1 typed-DTO surface Implementation plan refreshed: P1.2, P1.3, P1.4, P1.7, P4.1, P5.1 all marked DONE in docs/superpowers/specs/2026-04-07-vibe-erp-implementation-plan.md. Next priority candidates: P1.5 (metadata seeder) and P5.2 (pbc-partners). -
Adds the framework's event bus, the second cross-cutting service (after auth) that PBCs and plug-ins both consume. Implements the transactional outbox pattern from the architecture spec section 9 — events are written to the database in the same transaction as the publisher's domain change, so a publish followed by a rollback never escapes. This is the seam where a future Kafka/NATS bridge plugs in WITHOUT touching any PBC code. What landed: * New `platform/platform-events/` module: - `EventOutboxEntry` JPA entity backed by `platform__event_outbox` (id, event_id, topic, aggregate_type, aggregate_id, payload jsonb, status, attempts, last_error, occurred_at, dispatched_at, version). Status enum: PENDING / DISPATCHED / FAILED. - `EventOutboxRepository` Spring Data JPA repo with a pessimistic SELECT FOR UPDATE query for poller dispatch. - `ListenerRegistry` — in-memory subscription holder, indexed both by event class (Class.isInstance) and by topic string. Supports a `**` wildcard for the platform's audit subscriber. Backed by CopyOnWriteArrayList so dispatch is lock-free. - `EventBusImpl` — implements the api.v1 EventBus. publish() writes the outbox row AND synchronously delivers to in-process listeners in the SAME transaction. Marked Propagation.MANDATORY so the bus refuses to publish outside an existing transaction (preventing publish-and-rollback leaks). Listener exceptions are caught and logged; the outbox row still commits. - `OutboxPoller` — Spring @Scheduled component that runs every 5s, drains PENDING / FAILED rows under a pessimistic lock, marks them DISPATCHED. v0.5 has no real external dispatcher — the poller is the seam where Kafka/NATS plugs in later. - `EventBusConfiguration` — @EnableScheduling so the poller actually runs. Lives in this module so the seam activates automatically when platform-events is on the classpath. - `EventAuditLogSubscriber` — wildcard subscriber that logs every event at INFO. Demo proof that the bus works end-to-end. Future versions replace it with a real audit log writer. * `platform__event_outbox` Liquibase changeset (platform-events-001): table + unique index on event_id + index on (status, created_at) + index on topic. * DefaultPluginContext.eventBus is no longer a stub that throws — it's now the real EventBus injected by VibeErpPluginManager. Plug-ins can publish and subscribe via the api.v1 surface. Note: subscriptions are NOT auto-scoped to the plug-in lifecycle in v0.5; a plug-in that wants its subscriptions removed on stop() must call subscription.close() explicitly. Auto-scoping lands when per-plug-in Spring child contexts ship. * pbc-identity now publishes `UserCreatedEvent` after a successful UserService.create(). The event class is internal to pbc-identity (not in api.v1) — other PBCs subscribe by topic string (`identity.user.created`), not by class. This is the right tradeoff: string topics are stable across plug-in classloaders, class equality is not, and adding every event class to api.v1 would be perpetual surface-area bloat. Tests: 13 new unit tests (9 EventBusImplTest + 4 OutboxPollerTest) plus 2 new UserServiceTest cases that verify the publish happens on the happy path and does NOT happen when create() rejects a duplicate. Total now 76 unit tests across the framework, all green. End-to-end smoke test against fresh Postgres with the plug-in loaded (everything green): EventAuditLogSubscriber subscribed to ** at boot Outbox empty before any user create ✓ POST /api/v1/auth/login → 200 POST /api/v1/identity/users (create alice) → 201 Outbox row appears with topic=identity.user.created, status=PENDING immediately after create ✓ EventAuditLogSubscriber log line fires synchronously inside the create transaction ✓ POST /api/v1/identity/users (create bob) → 201 Wait 8s (one OutboxPoller cycle) Both outbox rows now DISPATCHED, dispatched_at set ✓ Existing PBCs still work: GET /api/v1/identity/users → 3 users ✓ GET /api/v1/catalog/uoms → 15 UoMs ✓ Plug-in still works: GET /api/v1/plugins/printing-shop/ping → 200 ✓ The most important assertion is the synchronous audit log line appearing on the same thread as the user creation request. That proves the entire chain — UserService.create() → eventBus.publish() → EventBusImpl writes outbox row → ListenerRegistry.deliver() finds wildcard subscriber → EventAuditLogSubscriber.handle() logs — runs end-to-end inside the publisher's transaction. The poller flipping PENDING → DISPATCHED 5s later proves the outbox + poller seam works without any external dispatcher. Bug encountered and fixed during the smoke test: • EventBusImplTest used `ObjectMapper().registerKotlinModule()` which doesn't pick up jackson-datatype-jsr310. Production code uses Spring Boot's auto-configured ObjectMapper which already has jsr310 because spring-boot-starter-web is on the classpath of distribution. The test setup was the only place using a bare mapper. Fixed by switching to `findAndRegisterModules()` AND by adding jackson-datatype-jsr310 as an explicit implementation dependency of platform-events (so future modules that depend on the bus without bringing web in still get Instant serialization). What is explicitly NOT in this chunk: • External dispatcher (Kafka/NATS bridge) — the poller is a no-op that just marks rows DISPATCHED. The seam exists; the dispatcher is a future P1.7.b unit. • Exponential backoff on FAILED rows — every cycle re-attempts. Real backoff lands when there's a real dispatcher to fail. • Dead-letter queue — same. • Per-plug-in subscription auto-scoping — plug-ins must close() explicitly today. • Async / fire-and-forget publish — synchronous in-process only. -
The reference printing-shop plug-in now actually does something: its main class registers two HTTP endpoints during start(context), and a real curl to /api/v1/plugins/printing-shop/ping returns the JSON the plug-in's lambda produced. End-to-end smoke test 10/10 green. This is the chunk that turns vibe_erp from "an ERP app that has a plug-in folder" into "an ERP framework whose plug-ins can serve traffic". What landed: * api.v1 — additive (binary-compatible per the api.v1 stability rule): - org.vibeerp.api.v1.plugin.HttpMethod (enum) - org.vibeerp.api.v1.plugin.PluginRequest (path params, query, body) - org.vibeerp.api.v1.plugin.PluginResponse (status + body) - org.vibeerp.api.v1.plugin.PluginEndpointHandler (fun interface) - org.vibeerp.api.v1.plugin.PluginEndpointRegistrar (per-plugin scoped, register(method, path, handler)) - PluginContext.endpoints getter with default impl that throws UnsupportedOperationException so the addition is binary-compatible with plug-ins compiled against earlier api.v1 builds. * platform-plugins — three new files: - PluginEndpointRegistry: process-wide registration storage. Uses Spring's AntPathMatcher so {var} extracts path variables. Synchronized mutation. Exact-match fast path before pattern loop. Rejects duplicate (method, path) per plug-in. unregisterAll(plugin) on shutdown. - ScopedPluginEndpointRegistrar: per-plugin wrapper that tags every register() call with the right plugin id. Plug-ins cannot register under another plug-in's namespace. - PluginEndpointDispatcher: single Spring @RestController at /api/v1/plugins/{pluginId}/** that catches GET/POST/PUT/PATCH/DELETE, asks the registry for a match, builds a PluginRequest, calls the handler, serializes the response. 404 on no match, 500 on handler throw (logged with stack trace). - DefaultPluginContext: implements PluginContext with a real SLF4J-backed logger (every line tagged with the plug-in id) and the scoped endpoint registrar. The other six services (eventBus, transaction, translator, localeProvider, permissionCheck, entityRegistry) throw UnsupportedOperationException with messages pointing at the implementation plan unit that will land each one. Loud failure beats silent no-op. * VibeErpPluginManager — after PF4J's startPlugins() now walks every loaded plug-in, casts the wrapper instance to api.v1.plugin.Plugin, and calls start(context) with a freshly-built DefaultPluginContext. Tracks the started set so destroy() can call stop() and unregisterAll() in reverse order. Catches plug-in start failures loudly without bringing the framework down. * Reference plug-in (PrintingShopPlugin): - Now extends BOTH org.pf4j.Plugin (so PF4J's loader can instantiate it via the Plugin-Class manifest entry) AND org.vibeerp.api.v1.plugin.Plugin (so the host's vibe_erp lifecycle hook can call start(context)). Uses Kotlin import aliases to disambiguate the two `Plugin` simple names. - In start(context), registers two endpoints: GET /ping — returns {plugin, version, ok, message} GET /echo/{name} — extracts path variable, echoes it back - The /echo handler proves path-variable extraction works end-to-end. * Build infrastructure: - reference-customer/plugin-printing-shop now has an `installToDev` Gradle task that builds the JAR and stages it into <repo>/plugins-dev/. The task wipes any previous staged copies first so renaming the JAR on a version bump doesn't leave PF4J trying to load two versions. - distribution's `bootRun` task now (a) depends on `installToDev` so the staging happens automatically and (b) sets workingDir to the repo root so application-dev.yaml's relative `vibeerp.plugins.directory: ./plugins-dev` resolves to the right place. Without (b) bootRun's CWD was distribution/ and PF4J found "No plugins" — which is exactly the bug that surfaced in the first smoke run. - .gitignore now excludes /plugins-dev/ and /files-dev/. Tests: 12 new unit tests for PluginEndpointRegistry covering literal paths, single/multi path variables, duplicate registration rejection, literal-vs-pattern precedence, cross-plug-in isolation, method matching, and unregisterAll. Total now 61 unit tests across the framework, all green. End-to-end smoke test against fresh Postgres + the plug-in JAR loaded by PF4J at boot (10/10 passing): GET /api/v1/plugins/printing-shop/ping (no auth) → 401 POST /api/v1/auth/login → access token GET /api/v1/plugins/printing-shop/ping (Bearer) → 200 {plugin, version, ok, message} GET /api/v1/plugins/printing-shop/echo/hello → 200, echoed=hello GET /api/v1/plugins/printing-shop/echo/world → 200, echoed=world GET /api/v1/plugins/printing-shop/nonexistent → 404 (no handler) GET /api/v1/plugins/missing-plugin/ping → 404 (no plugin) POST /api/v1/plugins/printing-shop/ping → 404 (wrong method) GET /api/v1/catalog/uoms (Bearer) → 200, 15 UoMs GET /api/v1/identity/users (Bearer) → 200, 1 user PF4J resolved the JAR, started the plug-in, the host called vibe_erp's start(context), the plug-in registered two endpoints, and the dispatcher routed real HTTP traffic to the plug-in's lambdas. The boot log shows the full chain. What is explicitly NOT in this chunk and remains for later: • plug-in linter (P1.2) — bytecode scan for forbidden imports • plug-in Liquibase application (P1.4) — plug-in-owned schemas • per-plug-in Spring child context — currently we just instantiate the plug-in via PF4J's classloader; there is no Spring context for the plug-in's own beans • PluginContext.eventBus / transaction / translator / etc. — they still throw UnsupportedOperationException with TODO messages • Path-template precedence between multiple competing patterns (only literal-beats-pattern is implemented, not most-specific-pattern) • Permission checks at the dispatcher (Spring Security still catches plug-in endpoints with the global "anyRequest authenticated" rule, which is the right v0.5 behavior) • Hot reload of plug-ins (cold restart only) Bug encountered and fixed during the smoke test: • application-dev.yaml has `vibeerp.plugins.directory: ./plugins-dev`, a relative path. Gradle's `bootRun` task by default uses the subproject's directory as the working directory, so the relative path resolved to <repo>/distribution/plugins-dev/ instead of <repo>/plugins-dev/. PF4J reported "No plugins" because that directory was empty. Fixed by setting bootRun.workingDir = rootProject.layout.projectDirectory.asFile. • One KDoc comment in PluginEndpointDispatcher contained the literal string `/api/v1/plugins/{pluginId}/**` inside backticks. The Kotlin lexer doesn't treat backticks as comment-suppressing, so `/**` opened a nested KDoc comment that was never closed and the file failed to compile. Same root cause as the AuthController bug earlier in the session. Rewrote the line to avoid the literal `/**` sequence.
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Implements the auth unit from the implementation plan. Until now, the framework let any caller hit any endpoint; with the single-tenant refactor there is no second wall, so auth was the most pressing gap. What landed: * New `platform-security` module owns the framework's security primitives (JWT issuer/verifier, password encoder, Spring Security filter chain config, AuthenticationFailedException). Lives between platform-persistence and platform-bootstrap. * `JwtIssuer` mints HS256-signed access (15min) and refresh (7d) tokens via NimbusJwtEncoder. `JwtVerifier` decodes them back to a typed `DecodedToken` so PBCs never need to import OAuth2 types. JWT secret is read from VIBEERP_JWT_SECRET; the framework refuses to start if the secret is shorter than 32 bytes. * `SecurityConfiguration` wires Spring Security with JWT resource server, stateless sessions, CSRF disabled, and a public allowlist for /actuator/health, /actuator/info, /api/v1/_meta/**, /api/v1/auth/login, /api/v1/auth/refresh. * `PrincipalContext` (in platform-persistence/security) is the bridge between Spring Security's SecurityContextHolder and the audit listener. Bound by `PrincipalContextFilter` which runs AFTER BearerTokenAuthenticationFilter so SecurityContextHolder is fully populated. The audit listener (AuditedJpaEntityListener) now reads from PrincipalContext, so created_by/updated_by are real user ids instead of __system__. * `pbc-identity` gains `UserCredential` (separate table from User — password hashes never share a query plan with user records), `AuthService` (login + refresh, generic AuthenticationFailedException on every failure to thwart account enumeration), and `AuthController` exposing /api/v1/auth/login and /api/v1/auth/refresh. * `BootstrapAdminInitializer` runs on first boot of an empty identity__user table, creates an `admin` user with a random 16-char password printed to the application logs. Subsequent boots see the user exists and skip silently. * GlobalExceptionHandler maps AuthenticationFailedException → 401 with a generic "invalid credentials" body (RFC 7807 ProblemDetail). * New module also brings BouncyCastle as a runtime-only dep (Argon2PasswordEncoder needs it). Tests: 38 unit tests pass, including JwtRoundTripTest (issue/decode round trip + tamper detection + secret-length validation), PrincipalContextTest (ThreadLocal lifecycle), AuthServiceTest (9 cases covering login + refresh happy paths and every failure mode). End-to-end smoke test against a fresh Postgres via docker-compose: GET /api/v1/identity/users (no auth) → 401 POST /api/v1/auth/login (admin + bootstrap) → 200 + access/refresh POST /api/v1/auth/login (wrong password) → 401 GET /api/v1/identity/users (Bearer) → 200, lists admin POST /api/v1/identity/users (Bearer) → 201, creates alice alice.created_by → admin's user UUID POST /api/v1/auth/refresh (refresh token) → 200 + new pair POST /api/v1/auth/refresh (access token) → 401 (type mismatch) GET /api/v1/identity/users (garbage token) → 401 GET /api/v1/_meta/info (no auth, public) → 200 Plan: docs/superpowers/specs/2026-04-07-vibe-erp-implementation-plan.md refreshed to drop the now-dead P1.1 (RLS hook) and H1 (per-region tenant routing), reorder priorities so P4.1 is first, and reflect the single-tenant change throughout. Bug fixes encountered along the way (caught by the smoke test, not by unit tests — the value of running real workflows): • JwtIssuer was producing IssuedToken.expiresAt with nanosecond precision but JWT exp is integer seconds; the round-trip test failed equality. Fixed by truncating to ChronoUnit.SECONDS at issue time. • PrincipalContextFilter was registered with addFilterAfter UsernamePasswordAuthenticationFilter, which runs BEFORE the OAuth2 BearerTokenAuthenticationFilter, so SecurityContextHolder was empty when the bridge filter read it. Result: every authenticated request still wrote __system__ in audit columns. Fixed by addFilterAfter BearerTokenAuthenticationFilter::class. • RefreshRequest is a single-String data class. jackson-module-kotlin interprets single-arg data classes as delegate-based creators, so Jackson tried to deserialize the entire JSON object as a String and threw HttpMessageNotReadableException. Fixed by adding @JsonCreator(mode = PROPERTIES) + @param:JsonProperty. -
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.
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BLOCKER: wire Hibernate multi-tenancy - application.yaml: set hibernate.tenant_identifier_resolver and hibernate.multiTenancy=DISCRIMINATOR so HibernateTenantResolver is actually installed into the SessionFactory - AuditedJpaEntity.tenantId: add @org.hibernate.annotations.TenantId so every PBC entity inherits the discriminator - AuditedJpaEntityListener.onCreate: throw if a caller pre-set tenantId to a different value than the current TenantContext, instead of silently overwriting (defense against cross-tenant write bugs) IMPORTANT: dependency hygiene - pbc-identity no longer depends on platform-bootstrap (wrong direction; bootstrap assembles PBCs at the top of the stack) - root build.gradle.kts: tighten the architectural-rule enforcement to also reject :pbc:* -> platform-bootstrap; switch plug-in detection from a fragile pathname heuristic to an explicit extra["vibeerp.module-kind"] = "plugin" marker; reference plug-in declares the marker IMPORTANT: api.v1 surface additions (all non-breaking) - Repository: documented closed exception set; new PersistenceExceptions.kt declares OptimisticLockConflictException, UniqueConstraintViolationException, EntityValidationException, and EntityNotFoundException so plug-ins never see Hibernate types - TaskContext: now exposes tenantId(), principal(), locale(), correlationId() so workflow handlers (which run outside an HTTP request) can pass tenant-aware calls back into api.v1 - EventBus: subscribe() now returns a Subscription with close() so long-lived subscribers can deregister explicitly; added a subscribe(topic: String, ...) overload for cross-classloader event routing where Class<E> equality is unreliable - IdentityApi.findUserById: tightened from Id<*> to PrincipalId so the type system rejects "wrong-id-kind" mistakes at the cross-PBC boundary NITs: - HealthController.kt -> MetaController.kt (file name now matches the class name); added TODO(v0.2) for reading implementationVersion from the Spring Boot BuildProperties bean