init backend

2026-01-09 18:35:06 +01:00 · 2026-01-09 18:35:06 +01:00 · 1c9ca4cfa2
parent 0ff158134c
commit 1c9ca4cfa2
74 changed files with 2520 additions and 0 deletions
--- a/back001/.gitignore
+++ b/back001/.gitignore
@ -0,0 +1,28 @@
+# Gradle
+.gradle/
+build/
+**/build/
+
+# IntelliJ IDEA
+.idea/
+*.iml
+*.ipr
+*.iws
+out/
+
+# Kotlin
+*.class
+
+# Logs
+*.log
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Env/local
+.env
+.env.*
+
+# Wrapper cache
+.gradle-wrapper/
--- a/back001/README.md
+++ b/back001/README.md
@ -0,0 +1,46 @@
+# Mosenioring Backend
+
+Production-ready Kotlin/Spring Boot 3 modular monolith skeleton for patient-caregiver-doctor coordination.
+
+## Requirements
+- Java 21
+- Docker + Docker Compose
+
+## Local Dev
+1) Start dependencies:
+
+```bash
+docker compose up -d
+```
+
+2) Run the API:
+
+```bash
+./gradlew :app:bootRun -Dspring.profiles.active=local
+```
+
+3) Run the worker:
+
+```bash
+./gradlew :workers:notification-worker:bootRun
+```
+
+## Auth (local profile)
+For local development, add headers:
+- `X-Local-User`: user id
+- `X-Local-Tenant`: tenant id
+- `X-Local-Roles`: comma-separated roles (ADMIN, DOCTOR, CAREGIVER)
+
+## OpenAPI
+- http://localhost:8080/swagger-ui/index.html
+
+## Key services
+- Postgres: localhost:5432 (mosenioring/mosenioring)
+- Keycloak: http://localhost:8081 (admin/admin)
+- RabbitMQ: http://localhost:15672 (guest/guest)
+- MinIO: http://localhost:9001 (minio/minio123)
+
+## Notes
+- Tenant ID is enforced via `TenantFilter` using JWT claim `tenant_id`, or `X-Tenant-Id` header (local).
+- Medication plan creation publishes a `MedicationPlanCreated` outbox event.
+- Worker consumes and emits `NotificationRequested` events with idempotency via Redis.
--- a/back001/app/build.gradle.kts
+++ b/back001/app/build.gradle.kts
@ -0,0 +1,36 @@
+plugins {
+    kotlin("jvm")
+    kotlin("plugin.spring")
+    kotlin("plugin.jpa")
+    id("org.springframework.boot")
+    id("io.spring.dependency-management")
+}
+
+dependencies {
+    implementation(project(":common"))
+    implementation(project(":modules:identity"))
+    implementation(project(":modules:clinical"))
+    implementation(project(":modules:messaging"))
+    implementation(project(":modules:notifications"))
+    implementation(project(":modules:audit"))
+    implementation(project(":modules:integrations"))
+
+    implementation("org.springframework.boot:spring-boot-starter-web")
+    implementation("org.springframework.boot:spring-boot-starter-security")
+    implementation("org.springframework.boot:spring-boot-starter-validation")
+    implementation("org.springframework.boot:spring-boot-starter-data-jpa")
+    implementation("org.springframework.boot:spring-boot-starter-amqp")
+    implementation("org.springframework.boot:spring-boot-starter-actuator")
+    implementation("org.springframework.boot:spring-boot-starter-oauth2-resource-server")
+    implementation("org.springframework.boot:spring-boot-starter-data-redis")
+    implementation("org.flywaydb:flyway-core")
+    implementation("org.springdoc:springdoc-openapi-starter-webmvc-ui:2.5.0")
+    implementation("io.micrometer:micrometer-registry-prometheus")
+    implementation("io.micrometer:micrometer-tracing-bridge-otel")
+    implementation("io.opentelemetry:opentelemetry-exporter-otlp:1.38.0")
+    implementation("software.amazon.awssdk:s3:2.25.63")
+
+    runtimeOnly("org.postgresql:postgresql")
+
+    testImplementation("org.springframework.boot:spring-boot-starter-test")
+}
--- a/back001/app/src/main/kotlin/com/mosenioring/app/Application.kt
+++ b/back001/app/src/main/kotlin/com/mosenioring/app/Application.kt
@ -0,0 +1,17 @@
+package com.mosenioring.app
+
+import org.springframework.boot.autoconfigure.SpringBootApplication
+import org.springframework.boot.runApplication
+import org.springframework.data.jpa.repository.config.EnableJpaRepositories
+import org.springframework.boot.autoconfigure.domain.EntityScan
+import org.springframework.scheduling.annotation.EnableScheduling
+
+@SpringBootApplication(scanBasePackages = ["com.mosenioring"])
+@EntityScan("com.mosenioring")
+@EnableJpaRepositories("com.mosenioring")
+@EnableScheduling
+class Application
+
+fun main(args: Array<String>) {
+    runApplication<Application>(*args)
+}
--- a/back001/app/src/main/kotlin/com/mosenioring/app/config/MessagingConfig.kt
+++ b/back001/app/src/main/kotlin/com/mosenioring/app/config/MessagingConfig.kt
@ -0,0 +1,33 @@
+package com.mosenioring.app.config
+
+import com.mosenioring.common.Events
+import org.springframework.amqp.core.Binding
+import org.springframework.amqp.core.BindingBuilder
+import org.springframework.amqp.core.DirectExchange
+import org.springframework.amqp.core.Queue
+import org.springframework.context.annotation.Bean
+import org.springframework.context.annotation.Configuration
+
+@Configuration
+class MessagingConfig {
+
+    @Bean
+    fun medicationExchange(): DirectExchange = DirectExchange(Events.MEDICATION_EXCHANGE)
+
+    @Bean
+    fun notificationExchange(): DirectExchange = DirectExchange(Events.NOTIFICATION_EXCHANGE)
+
+    @Bean
+    fun medicationQueue(): Queue = Queue(Events.MEDICATION_QUEUE, true)
+
+    @Bean
+    fun notificationQueue(): Queue = Queue(Events.NOTIFICATION_QUEUE, true)
+
+    @Bean
+    fun medicationBinding(medicationExchange: DirectExchange, medicationQueue: Queue): Binding =
+        BindingBuilder.bind(medicationQueue).to(medicationExchange).with(Events.MEDICATION_PLAN_CREATED)
+
+    @Bean
+    fun notificationBinding(notificationExchange: DirectExchange, notificationQueue: Queue): Binding =
+        BindingBuilder.bind(notificationQueue).to(notificationExchange).with(Events.NOTIFICATION_REQUESTED)
+}
--- a/back001/app/src/main/kotlin/com/mosenioring/app/config/SecurityConfig.kt
+++ b/back001/app/src/main/kotlin/com/mosenioring/app/config/SecurityConfig.kt
@ -0,0 +1,34 @@
+package com.mosenioring.app.config
+
+import org.springframework.context.annotation.Bean
+import org.springframework.context.annotation.Configuration
+import org.springframework.http.HttpMethod
+import com.mosenioring.common.security.LocalAuthFilter
+import org.springframework.security.config.Customizer.withDefaults
+import org.springframework.security.config.annotation.method.configuration.EnableMethodSecurity
+import org.springframework.security.config.annotation.web.builders.HttpSecurity
+import org.springframework.security.web.SecurityFilterChain
+import org.springframework.security.oauth2.server.resource.web.BearerTokenAuthenticationFilter
+import org.springframework.beans.factory.ObjectProvider
+
+@Configuration
+@EnableMethodSecurity
+class SecurityConfig {
+
+    @Bean
+    fun filterChain(http: HttpSecurity, localAuthFilterProvider: ObjectProvider<LocalAuthFilter>): SecurityFilterChain {
+        http
+            .csrf { it.disable() }
+            .authorizeHttpRequests {
+                it.requestMatchers("/actuator/**", "/v3/api-docs/**", "/swagger-ui/**").permitAll()
+                it.requestMatchers(HttpMethod.POST, "/api/v1/tenants").hasRole("ADMIN")
+                it.anyRequest().authenticated()
+            }
+            .oauth2ResourceServer { it.jwt(withDefaults()) }
+        val localAuthFilter = localAuthFilterProvider.ifAvailable
+        if (localAuthFilter != null) {
+            http.addFilterBefore(localAuthFilter, BearerTokenAuthenticationFilter::class.java)
+        }
+        return http.build()
+    }
+}
--- a/back001/app/src/main/kotlin/com/mosenioring/app/outbox/OutboxPublisher.kt
+++ b/back001/app/src/main/kotlin/com/mosenioring/app/outbox/OutboxPublisher.kt
@ -0,0 +1,43 @@
+package com.mosenioring.app.outbox
+
+import com.mosenioring.common.Events
+import com.mosenioring.common.outbox.OutboxRepository
+import org.slf4j.LoggerFactory
+import org.springframework.amqp.rabbit.core.RabbitTemplate
+import org.springframework.beans.factory.annotation.Value
+import org.springframework.scheduling.annotation.Scheduled
+import org.springframework.stereotype.Component
+import org.springframework.transaction.annotation.Transactional
+
+@Component
+class OutboxPublisher(
+    private val repository: OutboxRepository,
+    private val rabbitTemplate: RabbitTemplate,
+    @Value("\${app.outbox.publish-delay-ms:2000}") private val publishDelayMs: Long
+) {
+    private val logger = LoggerFactory.getLogger(javaClass)
+
+    @Scheduled(fixedDelayString = "\${app.outbox.publish-delay-ms:2000}")
+    @Transactional
+    fun publishPending() {
+        val pending = repository.findTop50ByStatusOrderByCreatedAtAsc("PENDING")
+        if (pending.isEmpty()) {
+            return
+        }
+        pending.forEach { event ->
+            val exchange = when (event.eventType) {
+                Events.MEDICATION_PLAN_CREATED -> Events.MEDICATION_EXCHANGE
+                Events.NOTIFICATION_REQUESTED -> Events.NOTIFICATION_EXCHANGE
+                else -> null
+            }
+            if (exchange == null) {
+                logger.warn("Unknown event type {}", event.eventType)
+                event.status = "FAILED"
+                return@forEach
+            }
+            rabbitTemplate.convertAndSend(exchange, event.eventType, event.payload)
+            event.status = "PUBLISHED"
+        }
+        repository.saveAll(pending)
+    }
+}
--- a/back001/app/src/main/resources/application.yml
+++ b/back001/app/src/main/resources/application.yml
@ -0,0 +1,81 @@
+spring:
+  application:
+    name: mosenioring-backend
+  datasource:
+    url: jdbc:postgresql://localhost:5432/mosenioring
+    username: mosenioring
+    password: mosenioring
+  jpa:
+    open-in-view: false
+    hibernate:
+      ddl-auto: validate
+    properties:
+      hibernate:
+        jdbc:
+          time_zone: UTC
+  flyway:
+    enabled: true
+  rabbitmq:
+    host: localhost
+    port: 5672
+    username: guest
+    password: guest
+  data:
+    redis:
+      host: localhost
+      port: 6379
+  security:
+    oauth2:
+      resourceserver:
+        jwt:
+          issuer-uri: http://localhost:8081/realms/mosenioring
+
+storage:
+  s3:
+    endpoint: http://localhost:9000
+    region: us-east-1
+    access-key: minio
+    secret-key: minio123
+    bucket: mosenioring
+
+app:
+  outbox:
+    publish-delay-ms: 2000
+  tenant:
+    header: X-Tenant-Id
+
+management:
+  endpoints:
+    web:
+      exposure:
+        include: health,info,prometheus
+  tracing:
+    sampling:
+      probability: 1.0
+
+logging:
+  level:
+    root: INFO
+
+---
+spring:
+  config:
+    activate:
+      on-profile: local
+  security:
+    oauth2:
+      resourceserver:
+        jwt:
+          issuer-uri: http://localhost:8081/realms/mosenioring
+
+app:
+  security:
+    local-auth-enabled: true
+
+---
+spring:
+  config:
+    activate:
+      on-profile: dev
+  datasource:
+    url: jdbc:postgresql://localhost:5432/mosenioring
--- a/back001/app/src/main/resources/db/migration/V1__init.sql
+++ b/back001/app/src/main/resources/db/migration/V1__init.sql
@ -0,0 +1,141 @@
+create table tenants (
+    id varchar(64) primary key,
+    name varchar(255) not null,
+    tenant_id varchar(64) not null,
+    created_at timestamptz not null,
+    updated_at timestamptz not null,
+    created_by varchar(128),
+    updated_by varchar(128)
+);
+
+create table users (
+    id varchar(64) primary key,
+    email varchar(255) not null,
+    role varchar(64) not null,
+    status varchar(32) not null,
+    tenant_id varchar(64) not null,
+    created_at timestamptz not null,
+    updated_at timestamptz not null,
+    created_by varchar(128),
+    updated_by varchar(128)
+);
+
+create table patients (
+    id varchar(64) primary key,
+    full_name varchar(255) not null,
+    tenant_id varchar(64) not null,
+    created_at timestamptz not null,
+    updated_at timestamptz not null,
+    created_by varchar(128),
+    updated_by varchar(128)
+);
+
+create table patient_caregivers (
+    id varchar(64) primary key,
+    patient_id varchar(64) not null,
+    user_id varchar(64) not null,
+    tenant_id varchar(64) not null,
+    created_at timestamptz not null,
+    updated_at timestamptz not null,
+    created_by varchar(128),
+    updated_by varchar(128)
+);
+
+create table patient_doctors (
+    id varchar(64) primary key,
+    patient_id varchar(64) not null,
+    user_id varchar(64) not null,
+    tenant_id varchar(64) not null,
+    created_at timestamptz not null,
+    updated_at timestamptz not null,
+    created_by varchar(128),
+    updated_by varchar(128)
+);
+
+create table medication_plans (
+    id varchar(64) primary key,
+    patient_id varchar(64) not null,
+    description text not null,
+    tenant_id varchar(64) not null,
+    created_at timestamptz not null,
+    updated_at timestamptz not null,
+    created_by varchar(128),
+    updated_by varchar(128)
+);
+
+create table tests (
+    id varchar(64) primary key,
+    patient_id varchar(64) not null,
+    test_name varchar(255) not null,
+    status varchar(64) not null,
+    tenant_id varchar(64) not null,
+    created_at timestamptz not null,
+    updated_at timestamptz not null,
+    created_by varchar(128),
+    updated_by varchar(128)
+);
+
+create table messages (
+    id varchar(64) primary key,
+    patient_id varchar(64) not null,
+    sender_id varchar(64) not null,
+    body text not null,
+    tenant_id varchar(64) not null,
+    created_at timestamptz not null,
+    updated_at timestamptz not null,
+    created_by varchar(128),
+    updated_by varchar(128)
+);
+
+create table files (
+    id varchar(64) primary key,
+    patient_id varchar(64),
+    file_name varchar(255) not null,
+    content_type varchar(255) not null,
+    storage_key varchar(512) not null,
+    tenant_id varchar(64) not null,
+    created_at timestamptz not null,
+    updated_at timestamptz not null,
+    created_by varchar(128),
+    updated_by varchar(128)
+);
+
+create table audit_events (
+    id varchar(64) primary key,
+    actor_id varchar(128) not null,
+    action varchar(128) not null,
+    resource varchar(128) not null,
+    resource_id varchar(64),
+    patient_id varchar(64),
+    tenant_id varchar(64) not null,
+    created_at timestamptz not null,
+    updated_at timestamptz not null,
+    created_by varchar(128),
+    updated_by varchar(128)
+);
+
+create table outbox_events (
+    id varchar(64) primary key,
+    event_type varchar(128) not null,
+    payload text not null,
+    status varchar(32) not null,
+    tenant_id varchar(64) not null,
+    created_at timestamptz not null,
+    updated_at timestamptz not null,
+    created_by varchar(128),
+    updated_by varchar(128)
+);
+
+create index idx_users_tenant on users(tenant_id);
+create index idx_patients_tenant on patients(tenant_id);
+create index idx_patient_caregivers_tenant on patient_caregivers(tenant_id);
+create index idx_patient_doctors_tenant on patient_doctors(tenant_id);
+create index idx_medication_plans_tenant on medication_plans(tenant_id);
+create index idx_tests_tenant on tests(tenant_id);
+create index idx_messages_tenant on messages(tenant_id);
+create index idx_files_tenant on files(tenant_id);
+create index idx_audit_events_tenant on audit_events(tenant_id);
+create index idx_outbox_events_tenant on outbox_events(tenant_id);
+
+create unique index idx_patient_caregivers_unique on patient_caregivers(tenant_id, patient_id, user_id);
+create unique index idx_patient_doctors_unique on patient_doctors(tenant_id, patient_id, user_id);
--- a/back001/build.gradle.kts
+++ b/back001/build.gradle.kts
@ -0,0 +1,55 @@
+import io.spring.gradle.dependencymanagement.dsl.DependencyManagementExtension
+import org.gradle.api.plugins.JavaPluginExtension
+import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
+
+plugins {
+    kotlin("jvm") version "1.9.23" apply false
+    kotlin("plugin.spring") version "1.9.23" apply false
+    kotlin("plugin.jpa") version "1.9.23" apply false
+    id("org.springframework.boot") version "3.2.5" apply false
+    id("io.spring.dependency-management") version "1.1.4" apply false
+}
+
+allprojects {
+    group = "com.mosenioring"
+    version = "0.1.0"
+
+    repositories {
+        mavenCentral()
+    }
+}
+
+subprojects {
+    plugins.withId("io.spring.dependency-management") {
+        the<DependencyManagementExtension>().apply {
+            imports {
+                mavenBom("org.springframework.boot:spring-boot-dependencies:3.2.5")
+            }
+        }
+    }
+
+    tasks.withType<KotlinCompile> {
+        kotlinOptions {
+            jvmTarget = "21"
+            freeCompilerArgs = listOf("-Xjsr305=strict")
+        }
+    }
+
+    plugins.withId("java") {
+        extensions.configure<JavaPluginExtension> {
+            toolchain {
+                languageVersion.set(JavaLanguageVersion.of(21))
+            }
+        }
+    }
+
+    plugins.withId("org.jetbrains.kotlin.jvm") {
+        extensions.configure<org.jetbrains.kotlin.gradle.dsl.KotlinJvmProjectExtension> {
+            jvmToolchain(21)
+        }
+    }
+
+    tasks.withType<Test> {
+        useJUnitPlatform()
+    }
+}
--- a/back001/common/build.gradle.kts
+++ b/back001/common/build.gradle.kts
@ -0,0 +1,24 @@
+plugins {
+    kotlin("jvm")
+    kotlin("plugin.spring")
+    kotlin("plugin.jpa")
+    id("io.spring.dependency-management")
+    id("java-library")
+}
+
+dependencies {
+    api("org.springframework.boot:spring-boot-starter-web")
+    api("org.springframework.boot:spring-boot-starter-security")
+    api("org.springframework.boot:spring-boot-starter-data-jpa")
+    api("org.springframework.boot:spring-boot-starter-validation")
+    api("org.springframework.boot:spring-boot-starter-actuator")
+    api("org.springframework.security:spring-security-oauth2-resource-server")
+    api("org.springframework.security:spring-security-oauth2-jose")
+    api("com.fasterxml.jackson.module:jackson-module-kotlin")
+    api("org.jetbrains.kotlin:kotlin-reflect")
+    api("io.opentelemetry:opentelemetry-api:1.38.0")
+    api("org.jetbrains.kotlinx:kotlinx-coroutines-core:1.8.1")
+
+    testImplementation("org.springframework.boot:spring-boot-starter-test")
+    testImplementation("org.mockito:mockito-core:5.12.0")
+}
--- a/back001/common/src/main/kotlin/com/mosenioring/common/BaseEntity.kt
+++ b/back001/common/src/main/kotlin/com/mosenioring/common/BaseEntity.kt
@ -0,0 +1,38 @@
+package com.mosenioring.common
+
+import jakarta.persistence.Column
+import jakarta.persistence.MappedSuperclass
+import jakarta.persistence.PrePersist
+import jakarta.persistence.PreUpdate
+import java.time.Instant
+
+@MappedSuperclass
+abstract class BaseEntity {
+
+    @Column(name = "tenant_id", nullable = false, updatable = false)
+    lateinit var tenantId: String
+
+    @Column(name = "created_at", nullable = false, updatable = false)
+    lateinit var createdAt: Instant
+
+    @Column(name = "updated_at", nullable = false)
+    lateinit var updatedAt: Instant
+
+    @Column(name = "created_by")
+    var createdBy: String? = null
+
+    @Column(name = "updated_by")
+    var updatedBy: String? = null
+
+    @PrePersist
+    fun onCreate() {
+        val now = Instant.now()
+        createdAt = now
+        updatedAt = now
+    }
+
+    @PreUpdate
+    fun onUpdate() {
+        updatedAt = Instant.now()
+    }
+}
--- a/back001/common/src/main/kotlin/com/mosenioring/common/Events.kt
+++ b/back001/common/src/main/kotlin/com/mosenioring/common/Events.kt
@ -0,0 +1,10 @@
+package com.mosenioring.common
+
+object Events {
+    const val MEDICATION_PLAN_CREATED = "MedicationPlanCreated"
+    const val NOTIFICATION_REQUESTED = "NotificationRequested"
+    const val MEDICATION_EXCHANGE = "medication.events"
+    const val NOTIFICATION_EXCHANGE = "notification.events"
+    const val MEDICATION_QUEUE = "medication.plan.created"
+    const val NOTIFICATION_QUEUE = "notification.requested"
+}
--- a/back001/common/src/main/kotlin/com/mosenioring/common/outbox/OutboxEvent.kt
+++ b/back001/common/src/main/kotlin/com/mosenioring/common/outbox/OutboxEvent.kt
@ -0,0 +1,24 @@
+package com.mosenioring.common.outbox
+
+import com.mosenioring.common.BaseEntity
+import jakarta.persistence.Column
+import jakarta.persistence.Entity
+import jakarta.persistence.Id
+import jakarta.persistence.Table
+
+@Entity
+@Table(name = "outbox_events")
+class OutboxEvent(
+    @Id
+    @Column(name = "id")
+    val id: String,
+
+    @Column(name = "event_type", nullable = false)
+    val eventType: String,
+
+    @Column(name = "payload", nullable = false, columnDefinition = "text")
+    val payload: String,
+
+    @Column(name = "status", nullable = false)
+    var status: String = "PENDING"
+) : BaseEntity()
--- a/back001/common/src/main/kotlin/com/mosenioring/common/outbox/OutboxRepository.kt
+++ b/back001/common/src/main/kotlin/com/mosenioring/common/outbox/OutboxRepository.kt
@ -0,0 +1,7 @@
+package com.mosenioring.common.outbox
+
+import org.springframework.data.jpa.repository.JpaRepository
+
+interface OutboxRepository : JpaRepository<OutboxEvent, String> {
+    fun findTop50ByStatusOrderByCreatedAtAsc(status: String): List<OutboxEvent>
+}
--- a/back001/common/src/main/kotlin/com/mosenioring/common/outbox/OutboxService.kt
+++ b/back001/common/src/main/kotlin/com/mosenioring/common/outbox/OutboxService.kt
@ -0,0 +1,28 @@
+package com.mosenioring.common.outbox
+
+import com.fasterxml.jackson.databind.ObjectMapper
+import com.mosenioring.common.security.SecurityUtils
+import com.mosenioring.common.tenant.TenantContext
+import org.springframework.context.annotation.Profile
+import org.springframework.stereotype.Service
+import java.util.UUID
+
+@Service
+@Profile("!worker")
+class OutboxService(
+    private val repository: OutboxRepository,
+    private val objectMapper: ObjectMapper
+) {
+    fun enqueue(eventType: String, payload: Any): OutboxEvent {
+        val tenantId = TenantContext.getTenantId() ?: "unknown"
+        val event = OutboxEvent(
+            id = UUID.randomUUID().toString(),
+            eventType = eventType,
+            payload = objectMapper.writeValueAsString(payload)
+        )
+        event.tenantId = tenantId
+        event.createdBy = SecurityUtils.currentUserId()
+        event.updatedBy = SecurityUtils.currentUserId()
+        return repository.save(event)
+    }
+}
--- a/back001/common/src/main/kotlin/com/mosenioring/common/security/LocalAuthFilter.kt
+++ b/back001/common/src/main/kotlin/com/mosenioring/common/security/LocalAuthFilter.kt
@ -0,0 +1,34 @@
+package com.mosenioring.common.security
+
+import jakarta.servlet.FilterChain
+import jakarta.servlet.http.HttpServletRequest
+import jakarta.servlet.http.HttpServletResponse
+import org.springframework.context.annotation.Profile
+import org.springframework.security.authentication.UsernamePasswordAuthenticationToken
+import org.springframework.security.core.authority.SimpleGrantedAuthority
+import org.springframework.security.core.context.SecurityContextHolder
+import org.springframework.stereotype.Component
+import org.springframework.web.filter.OncePerRequestFilter
+
+@Component
+@Profile("local")
+class LocalAuthFilter : OncePerRequestFilter() {
+
+    override fun doFilterInternal(
+        request: HttpServletRequest,
+        response: HttpServletResponse,
+        filterChain: FilterChain
+    ) {
+        val userId = request.getHeader("X-Local-User")
+        val tenantId = request.getHeader("X-Local-Tenant")
+        val rolesHeader = request.getHeader("X-Local-Roles")
+        if (!userId.isNullOrBlank() && !tenantId.isNullOrBlank()) {
+            val roles = rolesHeader?.split(",")?.map { it.trim() }?.filter { it.isNotBlank() }?.toSet() ?: emptySet()
+            val authorities = roles.map { SimpleGrantedAuthority("ROLE_$it") }
+            val principal = LocalUserPrincipal(userId, tenantId, roles)
+            val auth = UsernamePasswordAuthenticationToken(principal, "N/A", authorities)
+            SecurityContextHolder.getContext().authentication = auth
+        }
+        filterChain.doFilter(request, response)
+    }
+}
--- a/back001/common/src/main/kotlin/com/mosenioring/common/security/PatientAccess.kt
+++ b/back001/common/src/main/kotlin/com/mosenioring/common/security/PatientAccess.kt
@ -0,0 +1,8 @@
+package com.mosenioring.common.security
+
+import org.springframework.security.access.prepost.PreAuthorize
+
+@Target(AnnotationTarget.FUNCTION, AnnotationTarget.CLASS)
+@Retention(AnnotationRetention.RUNTIME)
+@PreAuthorize("@patientAccessChecker.hasAccess(#patientId)")
+annotation class PatientAccess
--- a/back001/common/src/main/kotlin/com/mosenioring/common/security/PatientAccessChecker.kt
+++ b/back001/common/src/main/kotlin/com/mosenioring/common/security/PatientAccessChecker.kt
@ -0,0 +1,26 @@
+package com.mosenioring.common.security
+
+import com.mosenioring.common.tenant.TenantContext
+import org.springframework.context.annotation.Profile
+import org.springframework.stereotype.Component
+
+interface PatientRelationshipRepository {
+    fun isCaregiverOf(tenantId: String, patientId: String, userId: String): Boolean
+    fun isDoctorOf(tenantId: String, patientId: String, userId: String): Boolean
+}
+
+@Component
+@Profile("!worker")
+class PatientAccessChecker(
+    private val relationships: PatientRelationshipRepository
+) {
+    fun hasAccess(patientId: String): Boolean {
+        val tenantId = TenantContext.getTenantId() ?: return false
+        if (SecurityUtils.hasRole("ADMIN")) {
+            return true
+        }
+        val userId = SecurityUtils.currentUserId() ?: return false
+        return relationships.isCaregiverOf(tenantId, patientId, userId) ||
+            relationships.isDoctorOf(tenantId, patientId, userId)
+    }
+}
--- a/back001/common/src/main/kotlin/com/mosenioring/common/security/SecurityUtils.kt
+++ b/back001/common/src/main/kotlin/com/mosenioring/common/security/SecurityUtils.kt
@ -0,0 +1,35 @@
+package com.mosenioring.common.security
+
+import org.springframework.security.core.Authentication
+import org.springframework.security.core.context.SecurityContextHolder
+import org.springframework.security.oauth2.jwt.Jwt
+import org.springframework.security.oauth2.server.resource.authentication.JwtAuthenticationToken
+
+object SecurityUtils {
+    fun currentUserId(): String? {
+        val authentication = SecurityContextHolder.getContext().authentication ?: return null
+        return when (authentication) {
+            is JwtAuthenticationToken -> authentication.token.subject
+            else -> (authentication.principal as? LocalUserPrincipal)?.userId
+        }
+    }
+
+    fun currentTenantId(): String? {
+        val authentication = SecurityContextHolder.getContext().authentication ?: return null
+        return when (authentication) {
+            is JwtAuthenticationToken -> authentication.token.getClaimAsString("tenant_id")
+            else -> (authentication.principal as? LocalUserPrincipal)?.tenantId
+        }
+    }
+
+    fun hasRole(role: String, authentication: Authentication? = null): Boolean {
+        val auth = authentication ?: SecurityContextHolder.getContext().authentication ?: return false
+        return auth.authorities.any { it.authority == "ROLE_$role" }
+    }
+}
+
+data class LocalUserPrincipal(
+    val userId: String,
+    val tenantId: String,
+    val roles: Set<String>
+)
--- a/back001/common/src/main/kotlin/com/mosenioring/common/tenant/TenantContext.kt
+++ b/back001/common/src/main/kotlin/com/mosenioring/common/tenant/TenantContext.kt
@ -0,0 +1,38 @@
+package com.mosenioring.common.tenant
+
+import kotlinx.coroutines.ThreadContextElement
+import kotlin.coroutines.AbstractCoroutineContextElement
+import kotlin.coroutines.CoroutineContext
+
+object TenantContext {
+    private val current = ThreadLocal<String?>()
+
+    fun getTenantId(): String? = current.get()
+
+    fun setTenantId(tenantId: String?) {
+        current.set(tenantId)
+    }
+
+    fun clear() {
+        current.remove()
+    }
+
+    fun asContextElement(tenantId: String?): CoroutineContext = TenantContextElement(tenantId)
+}
+
+class TenantContextElement(
+    private val tenantId: String?
+) : ThreadContextElement<String?>,
+    AbstractCoroutineContextElement(Key) {
+    companion object Key : CoroutineContext.Key<TenantContextElement>
+
+    override fun updateThreadContext(context: CoroutineContext): String? {
+        val previous = TenantContext.getTenantId()
+        TenantContext.setTenantId(tenantId)
+        return previous
+    }
+
+    override fun restoreThreadContext(context: CoroutineContext, oldState: String?) {
+        TenantContext.setTenantId(oldState)
+    }
+}
--- a/back001/common/src/main/kotlin/com/mosenioring/common/tenant/TenantFilter.kt
+++ b/back001/common/src/main/kotlin/com/mosenioring/common/tenant/TenantFilter.kt
@ -0,0 +1,30 @@
+package com.mosenioring.common.tenant
+
+import com.mosenioring.common.security.SecurityUtils
+import jakarta.servlet.FilterChain
+import jakarta.servlet.http.HttpServletRequest
+import jakarta.servlet.http.HttpServletResponse
+import org.springframework.beans.factory.annotation.Value
+import org.springframework.stereotype.Component
+import org.springframework.web.filter.OncePerRequestFilter
+
+@Component
+class TenantFilter(
+    @Value("\${app.tenant.header:X-Tenant-Id}") private val tenantHeader: String
+) : OncePerRequestFilter() {
+
+    override fun doFilterInternal(
+        request: HttpServletRequest,
+        response: HttpServletResponse,
+        filterChain: FilterChain
+    ) {
+        val tenantId = SecurityUtils.currentTenantId()
+            ?: request.getHeader(tenantHeader)
+        TenantContext.setTenantId(tenantId)
+        try {
+            filterChain.doFilter(request, response)
+        } finally {
+            TenantContext.clear()
+        }
+    }
+}
--- a/back001/common/src/main/kotlin/com/mosenioring/common/web/PageResponse.kt
+++ b/back001/common/src/main/kotlin/com/mosenioring/common/web/PageResponse.kt
@ -0,0 +1,8 @@
+package com.mosenioring.common.web
+
+data class PageResponse<T>(
+    val items: List<T>,
+    val page: Int,
+    val size: Int,
+    val total: Long
+)
--- a/back001/common/src/main/kotlin/com/mosenioring/common/web/ProblemDetailsAdvice.kt
+++ b/back001/common/src/main/kotlin/com/mosenioring/common/web/ProblemDetailsAdvice.kt
@ -0,0 +1,54 @@
+package com.mosenioring.common.web
+
+import jakarta.servlet.http.HttpServletRequest
+import org.springframework.http.HttpStatus
+import org.springframework.http.ProblemDetail
+import org.springframework.validation.FieldError
+import org.springframework.web.ErrorResponseException
+import org.springframework.web.bind.MethodArgumentNotValidException
+import org.springframework.web.bind.annotation.ExceptionHandler
+import org.springframework.web.bind.annotation.RestControllerAdvice
+
+@RestControllerAdvice
+class ProblemDetailsAdvice {
+
+    @ExceptionHandler(MethodArgumentNotValidException::class)
+    fun handleValidation(ex: MethodArgumentNotValidException, request: HttpServletRequest): ProblemDetail {
+        val detail = ProblemDetail.forStatus(HttpStatus.BAD_REQUEST)
+        detail.title = "Validation failed"
+        detail.type = java.net.URI.create("https://httpstatuses.io/400")
+        detail.setProperty("path", request.requestURI)
+        detail.setProperty("errors", ex.bindingResult.fieldErrors.map { it.toErrorMap() })
+        return detail
+    }
+
+    @ExceptionHandler(ErrorResponseException::class)
+    fun handleErrorResponse(ex: ErrorResponseException, request: HttpServletRequest): ProblemDetail {
+        val detail = ex.body
+        detail.setProperty("path", request.requestURI)
+        return detail
+    }
+
+    @ExceptionHandler(IllegalArgumentException::class)
+    fun handleIllegalArgument(ex: IllegalArgumentException, request: HttpServletRequest): ProblemDetail {
+        val detail = ProblemDetail.forStatus(HttpStatus.BAD_REQUEST)
+        detail.title = "Invalid request"
+        detail.detail = ex.message
+        detail.type = java.net.URI.create("https://httpstatuses.io/400")
+        detail.setProperty("path", request.requestURI)
+        return detail
+    }
+
+    @ExceptionHandler(IllegalStateException::class)
+    fun handleIllegalState(ex: IllegalStateException, request: HttpServletRequest): ProblemDetail {
+        val detail = ProblemDetail.forStatus(HttpStatus.CONFLICT)
+        detail.title = "Conflict"
+        detail.detail = ex.message
+        detail.type = java.net.URI.create("https://httpstatuses.io/409")
+        detail.setProperty("path", request.requestURI)
+        return detail
+    }
+
+    private fun FieldError.toErrorMap(): Map<String, Any?> =
+        mapOf("field" to field, "message" to (defaultMessage ?: "invalid"))
+}
--- a/back001/common/src/test/kotlin/com/mosenioring/common/PatientAccessCheckerTest.kt
+++ b/back001/common/src/test/kotlin/com/mosenioring/common/PatientAccessCheckerTest.kt
@ -0,0 +1,54 @@
+package com.mosenioring.common
+
+import com.mosenioring.common.security.LocalUserPrincipal
+import com.mosenioring.common.security.PatientAccessChecker
+import com.mosenioring.common.security.PatientRelationshipRepository
+import com.mosenioring.common.tenant.TenantContext
+import org.junit.jupiter.api.Assertions.assertFalse
+import org.junit.jupiter.api.Assertions.assertTrue
+import org.junit.jupiter.api.BeforeEach
+import org.junit.jupiter.api.Test
+import org.mockito.Mockito
+import org.springframework.security.authentication.UsernamePasswordAuthenticationToken
+import org.springframework.security.core.authority.SimpleGrantedAuthority
+import org.springframework.security.core.context.SecurityContextHolder
+
+class PatientAccessCheckerTest {
+
+    private lateinit var relationships: PatientRelationshipRepository
+    private lateinit var checker: PatientAccessChecker
+
+    @BeforeEach
+    fun setup() {
+        relationships = Mockito.mock(PatientRelationshipRepository::class.java)
+        checker = PatientAccessChecker(relationships)
+        TenantContext.setTenantId("t1")
+    }
+
+    @Test
+    fun `allows admin`() {
+        val auth = UsernamePasswordAuthenticationToken("admin", "n/a", listOf(SimpleGrantedAuthority("ROLE_ADMIN")))
+        SecurityContextHolder.getContext().authentication = auth
+        assertTrue(checker.hasAccess("p1"))
+    }
+
+    @Test
+    fun `denies when no relationship`() {
+        val principal = LocalUserPrincipal("user1", "t1", emptySet())
+        val auth = UsernamePasswordAuthenticationToken(principal, "n/a", emptyList())
+        SecurityContextHolder.getContext().authentication = auth
+        Mockito.`when`(relationships.isCaregiverOf("t1", "p1", "user1")).thenReturn(false)
+        Mockito.`when`(relationships.isDoctorOf("t1", "p1", "user1")).thenReturn(false)
+        assertFalse(checker.hasAccess("p1"))
+    }
+
+    @Test
+    fun `allows caregiver relationship`() {
+        val principal = LocalUserPrincipal("user2", "t1", setOf("CAREGIVER"))
+        val auth = UsernamePasswordAuthenticationToken(principal, "n/a", emptyList())
+        SecurityContextHolder.getContext().authentication = auth
+        Mockito.`when`(relationships.isCaregiverOf("t1", "p1", "user2")).thenReturn(true)
+        Mockito.`when`(relationships.isDoctorOf("t1", "p1", "user2")).thenReturn(false)
+        assertTrue(checker.hasAccess("p1"))
+    }
+}
--- a/back001/common/src/test/kotlin/com/mosenioring/common/TenantContextTest.kt
+++ b/back001/common/src/test/kotlin/com/mosenioring/common/TenantContextTest.kt
@ -0,0 +1,29 @@
+package com.mosenioring.common
+
+import com.mosenioring.common.tenant.TenantContext
+import kotlinx.coroutines.runBlocking
+import kotlinx.coroutines.withContext
+import org.junit.jupiter.api.Assertions.assertEquals
+import org.junit.jupiter.api.Assertions.assertNull
+import org.junit.jupiter.api.Test
+
+class TenantContextTest {
+
+    @Test
+    fun `sets and clears tenant context`() {
+        TenantContext.setTenantId("t1")
+        assertEquals("t1", TenantContext.getTenantId())
+        TenantContext.clear()
+        assertNull(TenantContext.getTenantId())
+    }
+
+    @Test
+    fun `propagates tenant context to coroutine`() = runBlocking {
+        TenantContext.setTenantId("t2")
+        val result = withContext(TenantContext.asContextElement("t2")) {
+            TenantContext.getTenantId()
+        }
+        assertEquals("t2", result)
+        TenantContext.clear()
+    }
+}
--- a/back001/docker-compose.yml
+++ b/back001/docker-compose.yml
@ -0,0 +1,61 @@
+version: "3.9"
+
+services:
+  postgres:
+    image: postgres:16
+    environment:
+      POSTGRES_DB: mosenioring
+      POSTGRES_USER: mosenioring
+      POSTGRES_PASSWORD: mosenioring
+    ports:
+      - "5432:5432"
+    volumes:
+      - pgdata:/var/lib/postgresql/data
+
+  keycloak:
+    image: quay.io/keycloak/keycloak:22.0.5
+    command: start-dev --import-realm
+    environment:
+      KEYCLOAK_ADMIN: admin
+      KEYCLOAK_ADMIN_PASSWORD: admin
+    ports:
+      - "8081:8080"
+    volumes:
+      - ./docker/keycloak/realm.json:/opt/keycloak/data/import/realm.json:ro
+
+  rabbitmq:
+    image: rabbitmq:3.12-management
+    ports:
+      - "5672:5672"
+      - "15672:15672"
+
+  redis:
+    image: redis:7
+    ports:
+      - "6379:6379"
+
+  minio:
+    image: minio/minio:RELEASE.2024-04-06T05-26-02Z
+    environment:
+      MINIO_ROOT_USER: minio
+      MINIO_ROOT_PASSWORD: minio123
+    command: server /data --console-address ":9001"
+    ports:
+      - "9000:9000"
+      - "9001:9001"
+    volumes:
+      - minio:/data
+
+  minio-init:
+    image: minio/mc:latest
+    depends_on:
+      - minio
+    entrypoint: ["/bin/sh", "-c"]
+    command: >
+      "mc alias set local http://minio:9000 minio minio123 &&
+       mc mb -p local/mosenioring &&
+       mc anonymous set public local/mosenioring"
+
+volumes:
+  pgdata:
+  minio:
--- a/back001/docker/keycloak/realm.json
+++ b/back001/docker/keycloak/realm.json
@ -0,0 +1,31 @@
+{
+  "realm": "mosenioring",
+  "enabled": true,
+  "displayName": "Mosenioring",
+  "roles": {
+    "realm": [
+      { "name": "ADMIN" },
+      { "name": "DOCTOR" },
+      { "name": "CAREGIVER" }
+    ]
+  },
+  "clients": [
+    {
+      "clientId": "mosenioring-backend",
+      "enabled": true,
+      "publicClient": true,
+      "directAccessGrantsEnabled": true,
+      "standardFlowEnabled": true,
+      "redirectUris": ["*"]
+    }
+  ],
+  "users": [
+    {
+      "username": "admin",
+      "enabled": true,
+      "email": "admin@example.com",
+      "credentials": [{ "type": "password", "value": "admin", "temporary": false }],
+      "realmRoles": ["ADMIN"]
+    }
+  ]
+}
--- a/back001/gradle.properties
+++ b/back001/gradle.properties
@ -0,0 +1,2 @@
+org.gradle.jvmargs=-Xmx1g -Dfile.encoding=UTF-8
+kotlin.code.style=official
--- a/back001/gradle/wrapper/gradle-wrapper.jar
+++ b/back001/gradle/wrapper/gradle-wrapper.jar
--- a/back001/gradle/wrapper/gradle-wrapper.properties
+++ b/back001/gradle/wrapper/gradle-wrapper.properties
@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.7-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
--- a/back001/gradlew
+++ b/back001/gradlew
@ -0,0 +1,249 @@
+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/HEAD/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+# This is normally unused
+# shellcheck disable=SC2034
+APP_BASE_NAME=${0##*/}
+# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
+APP_HOME=$( cd "${APP_HOME:-./}" > /dev/null && pwd -P ) || exit
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD=$JAVA_HOME/jre/sh/java
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    if ! command -v java >/dev/null 2>&1
+    then
+        die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Collect all arguments for the java command:
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#     and any embedded shellness will be escaped.
+#   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
+#     treated as '${Hostname}' itself on the command line.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        org.gradle.wrapper.GradleWrapperMain \
+        "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"
--- a/back001/gradlew.bat
+++ b/back001/gradlew.bat
@ -0,0 +1,92 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%"=="" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%"=="" set DIRNAME=.
+@rem This is normally unused
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if %ERRORLEVEL% equ 0 goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if %ERRORLEVEL% equ 0 goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
--- a/back001/modules/audit/build.gradle.kts
+++ b/back001/modules/audit/build.gradle.kts
@ -0,0 +1,12 @@
+plugins {
+    kotlin("jvm")
+    kotlin("plugin.spring")
+    kotlin("plugin.jpa")
+    id("io.spring.dependency-management")
+    id("java-library")
+}
+
+dependencies {
+    api(project(":common"))
+    implementation("org.springframework.boot:spring-boot-starter-data-jpa")
+}
--- a/back001/modules/audit/src/main/kotlin/com/mosenioring/audit/AuditEvent.kt
+++ b/back001/modules/audit/src/main/kotlin/com/mosenioring/audit/AuditEvent.kt
@ -0,0 +1,30 @@
+package com.mosenioring.audit
+
+import com.mosenioring.common.BaseEntity
+import jakarta.persistence.Column
+import jakarta.persistence.Entity
+import jakarta.persistence.Id
+import jakarta.persistence.Table
+
+@Entity
+@Table(name = "audit_events")
+class AuditEvent(
+    @Id
+    @Column(name = "id")
+    val id: String,
+
+    @Column(name = "actor_id", nullable = false)
+    val actorId: String,
+
+    @Column(name = "action", nullable = false)
+    val action: String,
+
+    @Column(name = "resource", nullable = false)
+    val resource: String,
+
+    @Column(name = "resource_id")
+    val resourceId: String?,
+
+    @Column(name = "patient_id")
+    val patientId: String?
+) : BaseEntity()
--- a/back001/modules/audit/src/main/kotlin/com/mosenioring/audit/AuditRepository.kt
+++ b/back001/modules/audit/src/main/kotlin/com/mosenioring/audit/AuditRepository.kt
@ -0,0 +1,5 @@
+package com.mosenioring.audit
+
+import org.springframework.data.jpa.repository.JpaRepository
+
+interface AuditRepository : JpaRepository<AuditEvent, String>
--- a/back001/modules/audit/src/main/kotlin/com/mosenioring/audit/service/AuditService.kt
+++ b/back001/modules/audit/src/main/kotlin/com/mosenioring/audit/service/AuditService.kt
@ -0,0 +1,28 @@
+package com.mosenioring.audit.service
+
+import com.mosenioring.audit.AuditEvent
+import com.mosenioring.audit.AuditRepository
+import com.mosenioring.common.security.SecurityUtils
+import com.mosenioring.common.tenant.TenantContext
+import org.springframework.stereotype.Service
+import java.util.UUID
+
+@Service
+class AuditService(
+    private val repository: AuditRepository
+) {
+    fun record(action: String, resource: String, resourceId: String?, patientId: String?) {
+        val event = AuditEvent(
+            id = UUID.randomUUID().toString(),
+            actorId = SecurityUtils.currentUserId() ?: "system",
+            action = action,
+            resource = resource,
+            resourceId = resourceId,
+            patientId = patientId
+        )
+        event.tenantId = TenantContext.getTenantId() ?: "unknown"
+        event.createdBy = event.actorId
+        event.updatedBy = event.actorId
+        repository.save(event)
+    }
+}
--- a/back001/modules/clinical/build.gradle.kts
+++ b/back001/modules/clinical/build.gradle.kts
@ -0,0 +1,14 @@
+plugins {
+    kotlin("jvm")
+    kotlin("plugin.spring")
+    kotlin("plugin.jpa")
+    id("io.spring.dependency-management")
+    id("java-library")
+}
+
+dependencies {
+    api(project(":common"))
+    implementation(project(":modules:audit"))
+    implementation("org.springframework.boot:spring-boot-starter-data-jpa")
+    implementation("org.springframework.boot:spring-boot-starter-validation")
+}
--- a/back001/modules/clinical/src/main/kotlin/com/mosenioring/clinical/MedicationPlan.kt
+++ b/back001/modules/clinical/src/main/kotlin/com/mosenioring/clinical/MedicationPlan.kt
@ -0,0 +1,21 @@
+package com.mosenioring.clinical
+
+import com.mosenioring.common.BaseEntity
+import jakarta.persistence.Column
+import jakarta.persistence.Entity
+import jakarta.persistence.Id
+import jakarta.persistence.Table
+
+@Entity
+@Table(name = "medication_plans")
+class MedicationPlan(
+    @Id
+    @Column(name = "id")
+    val id: String,
+
+    @Column(name = "patient_id", nullable = false)
+    val patientId: String,
+
+    @Column(name = "description", nullable = false)
+    val description: String
+) : BaseEntity()
--- a/back001/modules/clinical/src/main/kotlin/com/mosenioring/clinical/TestOrder.kt
+++ b/back001/modules/clinical/src/main/kotlin/com/mosenioring/clinical/TestOrder.kt
@ -0,0 +1,24 @@
+package com.mosenioring.clinical
+
+import com.mosenioring.common.BaseEntity
+import jakarta.persistence.Column
+import jakarta.persistence.Entity
+import jakarta.persistence.Id
+import jakarta.persistence.Table
+
+@Entity
+@Table(name = "tests")
+class TestOrder(
+    @Id
+    @Column(name = "id")
+    val id: String,
+
+    @Column(name = "patient_id", nullable = false)
+    val patientId: String,
+
+    @Column(name = "test_name", nullable = false)
+    val testName: String,
+
+    @Column(name = "status", nullable = false)
+    val status: String
+) : BaseEntity()
--- a/back001/modules/clinical/src/main/kotlin/com/mosenioring/clinical/api/ClinicalController.kt
+++ b/back001/modules/clinical/src/main/kotlin/com/mosenioring/clinical/api/ClinicalController.kt
@ -0,0 +1,45 @@
+package com.mosenioring.clinical.api
+
+import com.mosenioring.clinical.service.MedicationPlanService
+import com.mosenioring.clinical.service.TestOrderService
+import jakarta.validation.Valid
+import jakarta.validation.constraints.NotBlank
+import org.springframework.http.ResponseEntity
+import org.springframework.web.bind.annotation.*
+
+@RestController
+@RequestMapping("/api/v1")
+class ClinicalController(
+    private val medicationPlanService: MedicationPlanService,
+    private val testOrderService: TestOrderService
+) {
+    @PostMapping("/patients/{id}/medications")
+    fun createMedicationPlan(
+        @PathVariable id: String,
+        @Valid @RequestBody request: CreateMedicationPlanRequest
+    ): ResponseEntity<MedicationPlanResponse> {
+        val plan = medicationPlanService.createMedicationPlan(id, request.description)
+        return ResponseEntity.ok(MedicationPlanResponse(plan.id, plan.patientId, plan.description))
+    }
+
+    @PostMapping("/patients/{id}/tests")
+    fun createTestOrder(
+        @PathVariable id: String,
+        @Valid @RequestBody request: CreateTestOrderRequest
+    ): ResponseEntity<TestOrderResponse> {
+        val order = testOrderService.createTestOrder(id, request.testName)
+        return ResponseEntity.ok(TestOrderResponse(order.id, order.patientId, order.testName, order.status))
+    }
+}
+
+data class CreateMedicationPlanRequest(
+    @field:NotBlank val description: String
+)
+
+data class CreateTestOrderRequest(
+    @field:NotBlank val testName: String
+)
+
+data class MedicationPlanResponse(val id: String, val patientId: String, val description: String)
+
+data class TestOrderResponse(val id: String, val patientId: String, val testName: String, val status: String)
--- a/back001/modules/clinical/src/main/kotlin/com/mosenioring/clinical/repo/ClinicalRepositories.kt
+++ b/back001/modules/clinical/src/main/kotlin/com/mosenioring/clinical/repo/ClinicalRepositories.kt
@ -0,0 +1,13 @@
+package com.mosenioring.clinical.repo
+
+import com.mosenioring.clinical.MedicationPlan
+import com.mosenioring.clinical.TestOrder
+import org.springframework.data.jpa.repository.JpaRepository
+
+interface MedicationPlanRepository : JpaRepository<MedicationPlan, String> {
+    fun findByIdAndTenantId(id: String, tenantId: String): MedicationPlan?
+}
+
+interface TestOrderRepository : JpaRepository<TestOrder, String> {
+    fun findByIdAndTenantId(id: String, tenantId: String): TestOrder?
+}
--- a/back001/modules/clinical/src/main/kotlin/com/mosenioring/clinical/service/ClinicalServices.kt
+++ b/back001/modules/clinical/src/main/kotlin/com/mosenioring/clinical/service/ClinicalServices.kt
@ -0,0 +1,64 @@
+package com.mosenioring.clinical.service
+
+import com.mosenioring.audit.service.AuditService
+import com.mosenioring.clinical.MedicationPlan
+import com.mosenioring.clinical.TestOrder
+import com.mosenioring.clinical.repo.MedicationPlanRepository
+import com.mosenioring.clinical.repo.TestOrderRepository
+import com.mosenioring.common.Events
+import com.mosenioring.common.outbox.OutboxService
+import com.mosenioring.common.security.PatientAccess
+import com.mosenioring.common.security.SecurityUtils
+import com.mosenioring.common.tenant.TenantContext
+import org.springframework.security.access.prepost.PreAuthorize
+import org.springframework.stereotype.Service
+import org.springframework.transaction.annotation.Transactional
+import java.util.UUID
+
+@Service
+class MedicationPlanService(
+    private val repository: MedicationPlanRepository,
+    private val outboxService: OutboxService,
+    private val auditService: AuditService
+) {
+    @Transactional
+    @PatientAccess
+    fun createMedicationPlan(patientId: String, description: String): MedicationPlan {
+        val tenantId = TenantContext.getTenantId() ?: throw IllegalStateException("Missing tenant")
+        val plan = MedicationPlan(UUID.randomUUID().toString(), patientId, description)
+        plan.tenantId = tenantId
+        plan.createdBy = SecurityUtils.currentUserId()
+        plan.updatedBy = SecurityUtils.currentUserId()
+        val saved = repository.save(plan)
+        outboxService.enqueue(
+            Events.MEDICATION_PLAN_CREATED,
+            mapOf(
+                "eventId" to UUID.randomUUID().toString(),
+                "tenantId" to tenantId,
+                "patientId" to patientId,
+                "medicationPlanId" to saved.id
+            )
+        )
+        auditService.record("MEDICATION_PLAN_CREATED", "medication_plan", saved.id, patientId)
+        return saved
+    }
+}
+
+@Service
+class TestOrderService(
+    private val repository: TestOrderRepository,
+    private val auditService: AuditService
+) {
+    @Transactional
+    @PatientAccess
+    fun createTestOrder(patientId: String, testName: String): TestOrder {
+        val tenantId = TenantContext.getTenantId() ?: throw IllegalStateException("Missing tenant")
+        val order = TestOrder(UUID.randomUUID().toString(), patientId, testName, "ORDERED")
+        order.tenantId = tenantId
+        order.createdBy = SecurityUtils.currentUserId()
+        order.updatedBy = SecurityUtils.currentUserId()
+        val saved = repository.save(order)
+        auditService.record("TEST_ORDER_CREATED", "test", saved.id, patientId)
+        return saved
+    }
+}
--- a/back001/modules/identity/build.gradle.kts
+++ b/back001/modules/identity/build.gradle.kts
@ -0,0 +1,14 @@
+plugins {
+    kotlin("jvm")
+    kotlin("plugin.spring")
+    kotlin("plugin.jpa")
+    id("io.spring.dependency-management")
+    id("java-library")
+}
+
+dependencies {
+    api(project(":common"))
+    implementation(project(":modules:audit"))
+    implementation("org.springframework.boot:spring-boot-starter-data-jpa")
+    implementation("org.springframework.boot:spring-boot-starter-validation")
+}
--- a/back001/modules/identity/src/main/kotlin/com/mosenioring/identity/Patient.kt
+++ b/back001/modules/identity/src/main/kotlin/com/mosenioring/identity/Patient.kt
@ -0,0 +1,18 @@
+package com.mosenioring.identity
+
+import com.mosenioring.common.BaseEntity
+import jakarta.persistence.Column
+import jakarta.persistence.Entity
+import jakarta.persistence.Id
+import jakarta.persistence.Table
+
+@Entity
+@Table(name = "patients")
+class Patient(
+    @Id
+    @Column(name = "id")
+    val id: String,
+
+    @Column(name = "full_name", nullable = false)
+    val fullName: String
+) : BaseEntity()
--- a/back001/modules/identity/src/main/kotlin/com/mosenioring/identity/PatientCaregiver.kt
+++ b/back001/modules/identity/src/main/kotlin/com/mosenioring/identity/PatientCaregiver.kt
@ -0,0 +1,21 @@
+package com.mosenioring.identity
+
+import com.mosenioring.common.BaseEntity
+import jakarta.persistence.Column
+import jakarta.persistence.Entity
+import jakarta.persistence.Id
+import jakarta.persistence.Table
+
+@Entity
+@Table(name = "patient_caregivers")
+class PatientCaregiver(
+    @Id
+    @Column(name = "id")
+    val id: String,
+
+    @Column(name = "patient_id", nullable = false)
+    val patientId: String,
+
+    @Column(name = "user_id", nullable = false)
+    val userId: String
+) : BaseEntity()
--- a/back001/modules/identity/src/main/kotlin/com/mosenioring/identity/PatientDoctor.kt
+++ b/back001/modules/identity/src/main/kotlin/com/mosenioring/identity/PatientDoctor.kt
@ -0,0 +1,21 @@
+package com.mosenioring.identity
+
+import com.mosenioring.common.BaseEntity
+import jakarta.persistence.Column
+import jakarta.persistence.Entity
+import jakarta.persistence.Id
+import jakarta.persistence.Table
+
+@Entity
+@Table(name = "patient_doctors")
+class PatientDoctor(
+    @Id
+    @Column(name = "id")
+    val id: String,
+
+    @Column(name = "patient_id", nullable = false)
+    val patientId: String,
+
+    @Column(name = "user_id", nullable = false)
+    val userId: String
+) : BaseEntity()
--- a/back001/modules/identity/src/main/kotlin/com/mosenioring/identity/Tenant.kt
+++ b/back001/modules/identity/src/main/kotlin/com/mosenioring/identity/Tenant.kt
@ -0,0 +1,18 @@
+package com.mosenioring.identity
+
+import com.mosenioring.common.BaseEntity
+import jakarta.persistence.Column
+import jakarta.persistence.Entity
+import jakarta.persistence.Id
+import jakarta.persistence.Table
+
+@Entity
+@Table(name = "tenants")
+class Tenant(
+    @Id
+    @Column(name = "id")
+    val id: String,
+
+    @Column(name = "name", nullable = false)
+    val name: String
+) : BaseEntity()
--- a/back001/modules/identity/src/main/kotlin/com/mosenioring/identity/User.kt
+++ b/back001/modules/identity/src/main/kotlin/com/mosenioring/identity/User.kt
@ -0,0 +1,24 @@
+package com.mosenioring.identity
+
+import com.mosenioring.common.BaseEntity
+import jakarta.persistence.Column
+import jakarta.persistence.Entity
+import jakarta.persistence.Id
+import jakarta.persistence.Table
+
+@Entity
+@Table(name = "users")
+class User(
+    @Id
+    @Column(name = "id")
+    val id: String,
+
+    @Column(name = "email", nullable = false)
+    val email: String,
+
+    @Column(name = "role", nullable = false)
+    val role: String,
+
+    @Column(name = "status", nullable = false)
+    val status: String
+) : BaseEntity()
--- a/back001/modules/identity/src/main/kotlin/com/mosenioring/identity/api/IdentityController.kt
+++ b/back001/modules/identity/src/main/kotlin/com/mosenioring/identity/api/IdentityController.kt
@ -0,0 +1,70 @@
+package com.mosenioring.identity.api
+
+import com.mosenioring.identity.service.PatientService
+import com.mosenioring.identity.service.TenantService
+import com.mosenioring.identity.service.UserService
+import jakarta.validation.Valid
+import jakarta.validation.constraints.Email
+import jakarta.validation.constraints.NotBlank
+import org.springframework.http.ResponseEntity
+import org.springframework.web.bind.annotation.*
+
+@RestController
+@RequestMapping("/api/v1")
+class IdentityController(
+    private val tenantService: TenantService,
+    private val userService: UserService,
+    private val patientService: PatientService
+) {
+
+    @PostMapping("/tenants")
+    fun createTenant(@Valid @RequestBody request: CreateTenantRequest): ResponseEntity<TenantResponse> {
+        val tenant = tenantService.createTenant(request.name)
+        return ResponseEntity.ok(TenantResponse(tenant.id, tenant.name))
+    }
+
+    @PostMapping("/users/invite")
+    fun inviteUser(@Valid @RequestBody request: InviteUserRequest): ResponseEntity<UserResponse> {
+        val user = userService.inviteUser(request.email, request.role)
+        return ResponseEntity.ok(UserResponse(user.id, user.email, user.role, user.status))
+    }
+
+    @PostMapping("/patients")
+    fun createPatient(@Valid @RequestBody request: CreatePatientRequest): ResponseEntity<PatientResponse> {
+        val patient = patientService.createPatient(request.fullName)
+        return ResponseEntity.ok(PatientResponse(patient.id, patient.fullName))
+    }
+
+    @PostMapping("/patients/{id}/caregivers/{userId}")
+    fun linkCaregiver(@PathVariable id: String, @PathVariable userId: String): ResponseEntity<LinkResponse> {
+        val link = patientService.linkCaregiver(id, userId)
+        return ResponseEntity.ok(LinkResponse(link.id, link.patientId, link.userId))
+    }
+
+    @PostMapping("/patients/{id}/doctors/{userId}")
+    fun linkDoctor(@PathVariable id: String, @PathVariable userId: String): ResponseEntity<LinkResponse> {
+        val link = patientService.linkDoctor(id, userId)
+        return ResponseEntity.ok(LinkResponse(link.id, link.patientId, link.userId))
+    }
+}
+
+data class CreateTenantRequest(
+    @field:NotBlank val name: String
+)
+
+data class InviteUserRequest(
+    @field:Email val email: String,
+    @field:NotBlank val role: String
+)
+
+data class CreatePatientRequest(
+    @field:NotBlank val fullName: String
+)
+
+data class TenantResponse(val id: String, val name: String)
+
+data class UserResponse(val id: String, val email: String, val role: String, val status: String)
+
+data class PatientResponse(val id: String, val fullName: String)
+
+data class LinkResponse(val id: String, val patientId: String, val userId: String)
--- a/back001/modules/identity/src/main/kotlin/com/mosenioring/identity/repo/IdentityRepositories.kt
+++ b/back001/modules/identity/src/main/kotlin/com/mosenioring/identity/repo/IdentityRepositories.kt
@ -0,0 +1,22 @@
+package com.mosenioring.identity.repo
+
+import com.mosenioring.identity.*
+import org.springframework.data.jpa.repository.JpaRepository
+
+interface TenantRepository : JpaRepository<Tenant, String>
+
+interface UserRepository : JpaRepository<User, String> {
+    fun findByIdAndTenantId(id: String, tenantId: String): User?
+}
+
+interface PatientRepository : JpaRepository<Patient, String> {
+    fun findByIdAndTenantId(id: String, tenantId: String): Patient?
+}
+
+interface PatientCaregiverRepository : JpaRepository<PatientCaregiver, String> {
+    fun existsByTenantIdAndPatientIdAndUserId(tenantId: String, patientId: String, userId: String): Boolean
+}
+
+interface PatientDoctorRepository : JpaRepository<PatientDoctor, String> {
+    fun existsByTenantIdAndPatientIdAndUserId(tenantId: String, patientId: String, userId: String): Boolean
+}
--- a/back001/modules/identity/src/main/kotlin/com/mosenioring/identity/repo/PatientRelationshipRepositoryImpl.kt
+++ b/back001/modules/identity/src/main/kotlin/com/mosenioring/identity/repo/PatientRelationshipRepositoryImpl.kt
@ -0,0 +1,16 @@
+package com.mosenioring.identity.repo
+
+import com.mosenioring.common.security.PatientRelationshipRepository
+import org.springframework.stereotype.Repository
+
+@Repository
+class PatientRelationshipRepositoryImpl(
+    private val caregiverRepository: PatientCaregiverRepository,
+    private val doctorRepository: PatientDoctorRepository
+) : PatientRelationshipRepository {
+    override fun isCaregiverOf(tenantId: String, patientId: String, userId: String): Boolean =
+        caregiverRepository.existsByTenantIdAndPatientIdAndUserId(tenantId, patientId, userId)
+
+    override fun isDoctorOf(tenantId: String, patientId: String, userId: String): Boolean =
+        doctorRepository.existsByTenantIdAndPatientIdAndUserId(tenantId, patientId, userId)
+}
--- a/back001/modules/identity/src/main/kotlin/com/mosenioring/identity/service/IdentityServices.kt
+++ b/back001/modules/identity/src/main/kotlin/com/mosenioring/identity/service/IdentityServices.kt
@ -0,0 +1,97 @@
+package com.mosenioring.identity.service
+
+import com.mosenioring.audit.service.AuditService
+import com.mosenioring.common.security.SecurityUtils
+import com.mosenioring.common.tenant.TenantContext
+import com.mosenioring.identity.*
+import com.mosenioring.identity.repo.*
+import org.springframework.security.access.prepost.PreAuthorize
+import org.springframework.stereotype.Service
+import org.springframework.transaction.annotation.Transactional
+import java.util.UUID
+
+@Service
+class TenantService(
+    private val tenantRepository: TenantRepository,
+    private val auditService: AuditService
+) {
+    @Transactional
+    @PreAuthorize("hasRole('ADMIN')")
+    fun createTenant(name: String): Tenant {
+        val tenant = Tenant(UUID.randomUUID().toString(), name)
+        tenant.tenantId = tenant.id
+        tenant.createdBy = SecurityUtils.currentUserId()
+        tenant.updatedBy = SecurityUtils.currentUserId()
+        val saved = tenantRepository.save(tenant)
+        auditService.record("TENANT_CREATED", "tenant", saved.id, null)
+        return saved
+    }
+}
+
+@Service
+class UserService(
+    private val userRepository: UserRepository,
+    private val auditService: AuditService
+) {
+    @Transactional
+    @PreAuthorize("hasRole('ADMIN')")
+    fun inviteUser(email: String, role: String): User {
+        val tenantId = TenantContext.getTenantId() ?: throw IllegalStateException("Missing tenant")
+        val user = User(UUID.randomUUID().toString(), email, role, "INVITED")
+        user.tenantId = tenantId
+        user.createdBy = SecurityUtils.currentUserId()
+        user.updatedBy = SecurityUtils.currentUserId()
+        val saved = userRepository.save(user)
+        auditService.record("USER_INVITED", "user", saved.id, null)
+        return saved
+    }
+}
+
+@Service
+class PatientService(
+    private val patientRepository: PatientRepository,
+    private val caregiverRepository: PatientCaregiverRepository,
+    private val doctorRepository: PatientDoctorRepository,
+    private val auditService: AuditService
+) {
+    @Transactional
+    @PreAuthorize("hasAnyRole('ADMIN','DOCTOR','CAREGIVER')")
+    fun createPatient(fullName: String): Patient {
+        val tenantId = TenantContext.getTenantId() ?: throw IllegalStateException("Missing tenant")
+        val patient = Patient(UUID.randomUUID().toString(), fullName)
+        patient.tenantId = tenantId
+        patient.createdBy = SecurityUtils.currentUserId()
+        patient.updatedBy = SecurityUtils.currentUserId()
+        val saved = patientRepository.save(patient)
+        auditService.record("PATIENT_CREATED", "patient", saved.id, saved.id)
+        return saved
+    }
+
+    @Transactional
+    @PreAuthorize("hasRole('ADMIN')")
+    fun linkCaregiver(patientId: String, userId: String): PatientCaregiver {
+        val tenantId = TenantContext.getTenantId() ?: throw IllegalStateException("Missing tenant")
+        patientRepository.findByIdAndTenantId(patientId, tenantId) ?: throw IllegalArgumentException("Patient not found")
+        val link = PatientCaregiver(UUID.randomUUID().toString(), patientId, userId)
+        link.tenantId = tenantId
+        link.createdBy = SecurityUtils.currentUserId()
+        link.updatedBy = SecurityUtils.currentUserId()
+        val saved = caregiverRepository.save(link)
+        auditService.record("CARE_GIVER_LINKED", "patient_caregiver", saved.id, patientId)
+        return saved
+    }
+
+    @Transactional
+    @PreAuthorize("hasRole('ADMIN')")
+    fun linkDoctor(patientId: String, userId: String): PatientDoctor {
+        val tenantId = TenantContext.getTenantId() ?: throw IllegalStateException("Missing tenant")
+        patientRepository.findByIdAndTenantId(patientId, tenantId) ?: throw IllegalArgumentException("Patient not found")
+        val link = PatientDoctor(UUID.randomUUID().toString(), patientId, userId)
+        link.tenantId = tenantId
+        link.createdBy = SecurityUtils.currentUserId()
+        link.updatedBy = SecurityUtils.currentUserId()
+        val saved = doctorRepository.save(link)
+        auditService.record("DOCTOR_LINKED", "patient_doctor", saved.id, patientId)
+        return saved
+    }
+}
--- a/back001/modules/integrations/build.gradle.kts
+++ b/back001/modules/integrations/build.gradle.kts
@ -0,0 +1,13 @@
+plugins {
+    kotlin("jvm")
+    kotlin("plugin.spring")
+    kotlin("plugin.jpa")
+    id("io.spring.dependency-management")
+    id("java-library")
+}
+
+dependencies {
+    api(project(":common"))
+    implementation("org.springframework.boot:spring-boot-starter-data-jpa")
+    implementation("software.amazon.awssdk:s3:2.25.63")
+}
--- a/back001/modules/integrations/src/main/kotlin/com/mosenioring/integrations/FileMetadata.kt
+++ b/back001/modules/integrations/src/main/kotlin/com/mosenioring/integrations/FileMetadata.kt
@ -0,0 +1,27 @@
+package com.mosenioring.integrations
+
+import com.mosenioring.common.BaseEntity
+import jakarta.persistence.Column
+import jakarta.persistence.Entity
+import jakarta.persistence.Id
+import jakarta.persistence.Table
+
+@Entity
+@Table(name = "files")
+class FileMetadata(
+    @Id
+    @Column(name = "id")
+    val id: String,
+
+    @Column(name = "patient_id")
+    val patientId: String?,
+
+    @Column(name = "file_name", nullable = false)
+    val fileName: String,
+
+    @Column(name = "content_type", nullable = false)
+    val contentType: String,
+
+    @Column(name = "storage_key", nullable = false)
+    val storageKey: String
+) : BaseEntity()
--- a/back001/modules/integrations/src/main/kotlin/com/mosenioring/integrations/api/FilesController.kt
+++ b/back001/modules/integrations/src/main/kotlin/com/mosenioring/integrations/api/FilesController.kt
@ -0,0 +1,32 @@
+package com.mosenioring.integrations.api
+
+import com.mosenioring.integrations.service.FileService
+import com.mosenioring.integrations.service.PresignResponse
+import jakarta.validation.Valid
+import jakarta.validation.constraints.NotBlank
+import org.springframework.http.ResponseEntity
+import org.springframework.web.bind.annotation.*
+
+@RestController
+@RequestMapping("/api/v1")
+class FilesController(
+    private val fileService: FileService
+) {
+    @PostMapping("/files/presign-upload")
+    fun presignUpload(@Valid @RequestBody request: PresignUploadRequest): ResponseEntity<PresignResponse> {
+        val response = fileService.presignUpload(request.fileName, request.contentType, request.patientId)
+        return ResponseEntity.ok(response)
+    }
+
+    @GetMapping("/files/{fileId}/presign-download")
+    fun presignDownload(@PathVariable fileId: String): ResponseEntity<PresignResponse> {
+        val response = fileService.presignDownload(fileId)
+        return ResponseEntity.ok(response)
+    }
+}
+
+data class PresignUploadRequest(
+    @field:NotBlank val fileName: String,
+    @field:NotBlank val contentType: String,
+    val patientId: String?
+)
--- a/back001/modules/integrations/src/main/kotlin/com/mosenioring/integrations/repo/FileRepository.kt
+++ b/back001/modules/integrations/src/main/kotlin/com/mosenioring/integrations/repo/FileRepository.kt
@ -0,0 +1,8 @@
+package com.mosenioring.integrations.repo
+
+import com.mosenioring.integrations.FileMetadata
+import org.springframework.data.jpa.repository.JpaRepository
+
+interface FileRepository : JpaRepository<FileMetadata, String> {
+    fun findByIdAndTenantId(id: String, tenantId: String): FileMetadata?
+}
--- a/back001/modules/integrations/src/main/kotlin/com/mosenioring/integrations/service/FhirGateway.kt
+++ b/back001/modules/integrations/src/main/kotlin/com/mosenioring/integrations/service/FhirGateway.kt
@ -0,0 +1,10 @@
+package com.mosenioring.integrations.service
+
+import org.springframework.stereotype.Service
+
+@Service
+class FhirGateway {
+    fun submitObservation(payload: String): String {
+        return "stub-${payload.hashCode()}"
+    }
+}
--- a/back001/modules/integrations/src/main/kotlin/com/mosenioring/integrations/service/FileService.kt
+++ b/back001/modules/integrations/src/main/kotlin/com/mosenioring/integrations/service/FileService.kt
@ -0,0 +1,90 @@
+package com.mosenioring.integrations.service
+
+import com.mosenioring.common.security.SecurityUtils
+import com.mosenioring.common.tenant.TenantContext
+import com.mosenioring.integrations.FileMetadata
+import com.mosenioring.integrations.repo.FileRepository
+import org.springframework.beans.factory.annotation.Value
+import org.springframework.stereotype.Service
+import software.amazon.awssdk.auth.credentials.AwsBasicCredentials
+import software.amazon.awssdk.auth.credentials.StaticCredentialsProvider
+import software.amazon.awssdk.regions.Region
+import software.amazon.awssdk.services.s3.S3Configuration
+import software.amazon.awssdk.services.s3.presigner.S3Presigner
+import software.amazon.awssdk.services.s3.presigner.model.GetObjectPresignRequest
+import software.amazon.awssdk.services.s3.presigner.model.PutObjectPresignRequest
+import software.amazon.awssdk.services.s3.model.GetObjectRequest
+import software.amazon.awssdk.services.s3.model.PutObjectRequest
+import java.net.URI
+import java.time.Duration
+import java.util.UUID
+
+@Service
+class FileService(
+    private val repository: FileRepository,
+    @Value("\${storage.s3.endpoint}") private val endpoint: String,
+    @Value("\${storage.s3.region}") private val region: String,
+    @Value("\${storage.s3.access-key}") private val accessKey: String,
+    @Value("\${storage.s3.secret-key}") private val secretKey: String,
+    @Value("\${storage.s3.bucket}") private val bucket: String
+) {
+    private fun presigner(): S3Presigner {
+        val creds = AwsBasicCredentials.create(accessKey, secretKey)
+        return S3Presigner.builder()
+            .endpointOverride(URI.create(endpoint))
+            .region(Region.of(region))
+            .credentialsProvider(StaticCredentialsProvider.create(creds))
+            .serviceConfiguration(S3Configuration.builder().pathStyleAccessEnabled(true).build())
+            .build()
+    }
+
+    fun presignUpload(fileName: String, contentType: String, patientId: String?): PresignResponse {
+        val tenantId = TenantContext.getTenantId() ?: throw IllegalStateException("Missing tenant")
+        val fileId = UUID.randomUUID().toString()
+        val storageKey = "$tenantId/$fileId/$fileName"
+        val metadata = FileMetadata(fileId, patientId, fileName, contentType, storageKey)
+        metadata.tenantId = tenantId
+        metadata.createdBy = SecurityUtils.currentUserId()
+        metadata.updatedBy = SecurityUtils.currentUserId()
+        repository.save(metadata)
+
+        val presigner = presigner()
+        try {
+            val request = PutObjectRequest.builder()
+                .bucket(bucket)
+                .key(storageKey)
+                .contentType(contentType)
+                .build()
+            val presignRequest = PutObjectPresignRequest.builder()
+                .signatureDuration(Duration.ofMinutes(15))
+                .putObjectRequest(request)
+                .build()
+            val presigned = presigner.presignPutObject(presignRequest)
+            return PresignResponse(fileId, presigned.url().toString())
+        } finally {
+            presigner.close()
+        }
+    }
+
+    fun presignDownload(fileId: String): PresignResponse {
+        val tenantId = TenantContext.getTenantId() ?: throw IllegalStateException("Missing tenant")
+        val metadata = repository.findByIdAndTenantId(fileId, tenantId) ?: throw IllegalArgumentException("File not found")
+        val presigner = presigner()
+        try {
+            val request = GetObjectRequest.builder()
+                .bucket(bucket)
+                .key(metadata.storageKey)
+                .build()
+            val presignRequest = GetObjectPresignRequest.builder()
+                .signatureDuration(Duration.ofMinutes(15))
+                .getObjectRequest(request)
+                .build()
+            val presigned = presigner.presignGetObject(presignRequest)
+            return PresignResponse(metadata.id, presigned.url().toString())
+        } finally {
+            presigner.close()
+        }
+    }
+}
+
+data class PresignResponse(val fileId: String, val url: String)
--- a/back001/modules/messaging/build.gradle.kts
+++ b/back001/modules/messaging/build.gradle.kts
@ -0,0 +1,14 @@
+plugins {
+    kotlin("jvm")
+    kotlin("plugin.spring")
+    kotlin("plugin.jpa")
+    id("io.spring.dependency-management")
+    id("java-library")
+}
+
+dependencies {
+    api(project(":common"))
+    implementation(project(":modules:audit"))
+    implementation("org.springframework.boot:spring-boot-starter-data-jpa")
+    implementation("org.springframework.boot:spring-boot-starter-validation")
+}
--- a/back001/modules/messaging/src/main/kotlin/com/mosenioring/messaging/Message.kt
+++ b/back001/modules/messaging/src/main/kotlin/com/mosenioring/messaging/Message.kt
@ -0,0 +1,24 @@
+package com.mosenioring.messaging
+
+import com.mosenioring.common.BaseEntity
+import jakarta.persistence.Column
+import jakarta.persistence.Entity
+import jakarta.persistence.Id
+import jakarta.persistence.Table
+
+@Entity
+@Table(name = "messages")
+class Message(
+    @Id
+    @Column(name = "id")
+    val id: String,
+
+    @Column(name = "patient_id", nullable = false)
+    val patientId: String,
+
+    @Column(name = "sender_id", nullable = false)
+    val senderId: String,
+
+    @Column(name = "body", nullable = false)
+    val body: String
+) : BaseEntity()
--- a/back001/modules/messaging/src/main/kotlin/com/mosenioring/messaging/api/MessagingController.kt
+++ b/back001/modules/messaging/src/main/kotlin/com/mosenioring/messaging/api/MessagingController.kt
@ -0,0 +1,28 @@
+package com.mosenioring.messaging.api
+
+import com.mosenioring.messaging.service.MessageService
+import jakarta.validation.Valid
+import jakarta.validation.constraints.NotBlank
+import org.springframework.http.ResponseEntity
+import org.springframework.web.bind.annotation.*
+
+@RestController
+@RequestMapping("/api/v1")
+class MessagingController(
+    private val messageService: MessageService
+) {
+    @PostMapping("/patients/{id}/messages")
+    fun addMessage(
+        @PathVariable id: String,
+        @Valid @RequestBody request: AddMessageRequest
+    ): ResponseEntity<MessageResponse> {
+        val message = messageService.addMessage(id, request.body)
+        return ResponseEntity.ok(MessageResponse(message.id, message.patientId, message.senderId, message.body))
+    }
+}
+
+data class AddMessageRequest(
+    @field:NotBlank val body: String
+)
+
+data class MessageResponse(val id: String, val patientId: String, val senderId: String, val body: String)
--- a/back001/modules/messaging/src/main/kotlin/com/mosenioring/messaging/repo/MessageRepository.kt
+++ b/back001/modules/messaging/src/main/kotlin/com/mosenioring/messaging/repo/MessageRepository.kt
@ -0,0 +1,6 @@
+package com.mosenioring.messaging.repo
+
+import com.mosenioring.messaging.Message
+import org.springframework.data.jpa.repository.JpaRepository
+
+interface MessageRepository : JpaRepository<Message, String>
--- a/back001/modules/messaging/src/main/kotlin/com/mosenioring/messaging/service/MessageService.kt
+++ b/back001/modules/messaging/src/main/kotlin/com/mosenioring/messaging/service/MessageService.kt
@ -0,0 +1,31 @@
+package com.mosenioring.messaging.service
+
+import com.mosenioring.audit.service.AuditService
+import com.mosenioring.common.security.PatientAccess
+import com.mosenioring.common.security.SecurityUtils
+import com.mosenioring.common.tenant.TenantContext
+import com.mosenioring.messaging.Message
+import com.mosenioring.messaging.repo.MessageRepository
+import org.springframework.stereotype.Service
+import org.springframework.transaction.annotation.Transactional
+import java.util.UUID
+
+@Service
+class MessageService(
+    private val repository: MessageRepository,
+    private val auditService: AuditService
+) {
+    @Transactional
+    @PatientAccess
+    fun addMessage(patientId: String, body: String): Message {
+        val tenantId = TenantContext.getTenantId() ?: throw IllegalStateException("Missing tenant")
+        val senderId = SecurityUtils.currentUserId() ?: throw IllegalStateException("Missing user")
+        val message = Message(UUID.randomUUID().toString(), patientId, senderId, body)
+        message.tenantId = tenantId
+        message.createdBy = senderId
+        message.updatedBy = senderId
+        val saved = repository.save(message)
+        auditService.record("MESSAGE_ADDED", "message", saved.id, patientId)
+        return saved
+    }
+}
--- a/back001/modules/notifications/build.gradle.kts
+++ b/back001/modules/notifications/build.gradle.kts
@ -0,0 +1,13 @@
+plugins {
+    kotlin("jvm")
+    kotlin("plugin.spring")
+    kotlin("plugin.jpa")
+    id("io.spring.dependency-management")
+    id("java-library")
+}
+
+dependencies {
+    api(project(":common"))
+    implementation("org.springframework.boot:spring-boot-starter-data-jpa")
+    implementation("org.springframework.boot:spring-boot-starter-amqp")
+}
--- a/back001/modules/notifications/src/main/kotlin/com/mosenioring/notifications/api/NotificationsController.kt
+++ b/back001/modules/notifications/src/main/kotlin/com/mosenioring/notifications/api/NotificationsController.kt
@ -0,0 +1,25 @@
+package com.mosenioring.notifications.api
+
+import com.mosenioring.notifications.service.NotificationService
+import jakarta.validation.Valid
+import jakarta.validation.constraints.NotBlank
+import org.springframework.http.ResponseEntity
+import org.springframework.web.bind.annotation.*
+
+@RestController
+@RequestMapping("/api/v1")
+class NotificationsController(
+    private val notificationService: NotificationService
+) {
+    @PostMapping("/notifications/test")
+    fun enqueueTest(@Valid @RequestBody request: NotificationRequest): ResponseEntity<NotificationResponse> {
+        val eventId = notificationService.enqueueTestNotification(request.message)
+        return ResponseEntity.ok(NotificationResponse(eventId))
+    }
+}
+
+data class NotificationRequest(
+    @field:NotBlank val message: String
+)
+
+data class NotificationResponse(val eventId: String)
--- a/back001/modules/notifications/src/main/kotlin/com/mosenioring/notifications/service/NotificationService.kt
+++ b/back001/modules/notifications/src/main/kotlin/com/mosenioring/notifications/service/NotificationService.kt
@ -0,0 +1,30 @@
+package com.mosenioring.notifications.service
+
+import com.mosenioring.common.Events
+import com.mosenioring.common.outbox.OutboxService
+import com.mosenioring.common.security.SecurityUtils
+import com.mosenioring.common.tenant.TenantContext
+import org.springframework.stereotype.Service
+import org.springframework.transaction.annotation.Transactional
+import java.util.UUID
+
+@Service
+class NotificationService(
+    private val outboxService: OutboxService
+) {
+    @Transactional
+    fun enqueueTestNotification(message: String): String {
+        val tenantId = TenantContext.getTenantId() ?: throw IllegalStateException("Missing tenant")
+        val eventId = UUID.randomUUID().toString()
+        outboxService.enqueue(
+            Events.NOTIFICATION_REQUESTED,
+            mapOf(
+                "eventId" to eventId,
+                "tenantId" to tenantId,
+                "message" to message,
+                "requestedBy" to (SecurityUtils.currentUserId() ?: "unknown")
+            )
+        )
+        return eventId
+    }
+}
--- a/back001/requests.http
+++ b/back001/requests.http
@ -0,0 +1,55 @@
+### Local tenant setup (use local profile + headers)
+POST http://localhost:8080/api/v1/tenants
+X-Local-User: admin
+X-Local-Tenant: tenant-demo
+X-Local-Roles: ADMIN
+Content-Type: application/json
+
+{
+  "name": "Demo Tenant"
+}
+
+### Invite user
+POST http://localhost:8080/api/v1/users/invite
+X-Local-User: admin
+X-Local-Tenant: tenant-demo
+X-Local-Roles: ADMIN
+Content-Type: application/json
+
+{
+  "email": "doc@example.com",
+  "role": "DOCTOR"
+}
+
+### Create patient
+POST http://localhost:8080/api/v1/patients
+X-Local-User: admin
+X-Local-Tenant: tenant-demo
+X-Local-Roles: ADMIN
+Content-Type: application/json
+
+{
+  "fullName": "Jane Doe"
+}
+
+### Create medication plan
+POST http://localhost:8080/api/v1/patients/{patientId}/medications
+X-Local-User: admin
+X-Local-Tenant: tenant-demo
+X-Local-Roles: ADMIN
+Content-Type: application/json
+
+{
+  "description": "Take 5mg daily"
+}
+
+### Test notification
+POST http://localhost:8080/api/v1/notifications/test
+X-Local-User: admin
+X-Local-Tenant: tenant-demo
+X-Local-Roles: ADMIN
+Content-Type: application/json
+
+{
+  "message": "Test notification"
+}
--- a/back001/settings.gradle.kts
+++ b/back001/settings.gradle.kts
@ -0,0 +1,13 @@
+rootProject.name = "mosenioring-backend"
+
+include(
+    ":app",
+    ":common",
+    ":modules:identity",
+    ":modules:clinical",
+    ":modules:messaging",
+    ":modules:notifications",
+    ":modules:audit",
+    ":modules:integrations",
+    ":workers:notification-worker"
+)
--- a/back001/workers/notification-worker/build.gradle.kts
+++ b/back001/workers/notification-worker/build.gradle.kts
@ -0,0 +1,16 @@
+plugins {
+    kotlin("jvm")
+    kotlin("plugin.spring")
+    id("org.springframework.boot")
+    id("io.spring.dependency-management")
+}
+
+dependencies {
+    implementation(project(":common"))
+    implementation("org.springframework.boot:spring-boot-starter-amqp")
+    implementation("org.springframework.boot:spring-boot-starter-data-redis")
+    implementation("org.springframework.boot:spring-boot-starter-actuator")
+    implementation("com.fasterxml.jackson.module:jackson-module-kotlin")
+
+    testImplementation("org.springframework.boot:spring-boot-starter-test")
+}
--- a/back001/workers/notification-worker/src/main/kotlin/com/mosenioring/worker/NotificationListener.kt
+++ b/back001/workers/notification-worker/src/main/kotlin/com/mosenioring/worker/NotificationListener.kt
@ -0,0 +1,41 @@
+package com.mosenioring.worker
+
+import com.fasterxml.jackson.databind.ObjectMapper
+import com.mosenioring.common.Events
+import org.slf4j.LoggerFactory
+import org.springframework.amqp.rabbit.annotation.RabbitListener
+import org.springframework.amqp.rabbit.core.RabbitTemplate
+import org.springframework.beans.factory.annotation.Value
+import org.springframework.data.redis.core.StringRedisTemplate
+import org.springframework.stereotype.Component
+import java.time.Duration
+
+@Component
+class NotificationListener(
+    private val redisTemplate: StringRedisTemplate,
+    private val rabbitTemplate: RabbitTemplate,
+    private val objectMapper: ObjectMapper,
+    @Value("\${app.idempotency.ttl-seconds:3600}") private val ttlSeconds: Long
+) {
+    private val logger = LoggerFactory.getLogger(javaClass)
+
+    @RabbitListener(queues = [Events.MEDICATION_QUEUE])
+    fun onMedicationPlanCreated(payload: String) {
+        val node = objectMapper.readTree(payload)
+        val eventId = node["eventId"]?.asText() ?: return
+        val idempotencyKey = "medication:$eventId"
+        val acquired = redisTemplate.opsForValue().setIfAbsent(idempotencyKey, "1", Duration.ofSeconds(ttlSeconds))
+        if (acquired != true) {
+            logger.info("Duplicate event ignored: {}", eventId)
+            return
+        }
+        val notificationPayload = mapOf(
+            "eventId" to eventId,
+            "tenantId" to node["tenantId"]?.asText(),
+            "patientId" to node["patientId"]?.asText(),
+            "message" to "Medication plan created"
+        )
+        rabbitTemplate.convertAndSend(Events.NOTIFICATION_EXCHANGE, Events.NOTIFICATION_REQUESTED, objectMapper.writeValueAsString(notificationPayload))
+        logger.info("Notification requested for medication plan event {}", eventId)
+    }
+}
--- a/back001/workers/notification-worker/src/main/kotlin/com/mosenioring/worker/NotificationWorkerApplication.kt
+++ b/back001/workers/notification-worker/src/main/kotlin/com/mosenioring/worker/NotificationWorkerApplication.kt
@ -0,0 +1,11 @@
+package com.mosenioring.worker
+
+import org.springframework.boot.autoconfigure.SpringBootApplication
+import org.springframework.boot.runApplication
+
+@SpringBootApplication(scanBasePackages = ["com.mosenioring"])
+class NotificationWorkerApplication
+
+fun main(args: Array<String>) {
+    runApplication<NotificationWorkerApplication>(*args)
+}
--- a/back001/workers/notification-worker/src/main/kotlin/com/mosenioring/worker/WorkerMessagingConfig.kt
+++ b/back001/workers/notification-worker/src/main/kotlin/com/mosenioring/worker/WorkerMessagingConfig.kt
@ -0,0 +1,23 @@
+package com.mosenioring.worker
+
+import com.mosenioring.common.Events
+import org.springframework.amqp.core.Binding
+import org.springframework.amqp.core.BindingBuilder
+import org.springframework.amqp.core.DirectExchange
+import org.springframework.amqp.core.Queue
+import org.springframework.context.annotation.Bean
+import org.springframework.context.annotation.Configuration
+
+@Configuration
+class WorkerMessagingConfig {
+
+    @Bean
+    fun medicationExchange(): DirectExchange = DirectExchange(Events.MEDICATION_EXCHANGE)
+
+    @Bean
+    fun medicationQueue(): Queue = Queue(Events.MEDICATION_QUEUE, true)
+
+    @Bean
+    fun medicationBinding(medicationExchange: DirectExchange, medicationQueue: Queue): Binding =
+        BindingBuilder.bind(medicationQueue).to(medicationExchange).with(Events.MEDICATION_PLAN_CREATED)
+}
--- a/back001/workers/notification-worker/src/main/resources/application.yml
+++ b/back001/workers/notification-worker/src/main/resources/application.yml
@ -0,0 +1,30 @@
+spring:
+  application:
+    name: notification-worker
+  profiles:
+    active: worker
+  main:
+    web-application-type: none
+  autoconfigure:
+    exclude:
+      - org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration
+      - org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaAutoConfiguration
+  rabbitmq:
+    host: localhost
+    port: 5672
+    username: guest
+    password: guest
+  data:
+    redis:
+      host: localhost
+      port: 6379
+
+app:
+  idempotency:
+    ttl-seconds: 3600
+
+management:
+  endpoints:
+    web:
+      exposure:
+        include: health,info,prometheus