diff --git a/cameleer-server-app/src/main/java/com/cameleer/server/app/alerting/config/AlertingBeanConfig.java b/cameleer-server-app/src/main/java/com/cameleer/server/app/alerting/config/AlertingBeanConfig.java
new file mode 100644
index 00000000..c14057eb
--- /dev/null
+++ b/cameleer-server-app/src/main/java/com/cameleer/server/app/alerting/config/AlertingBeanConfig.java
@@ -0,0 +1,17 @@
+package com.cameleer.server.app.alerting.config;
+
+import com.cameleer.server.app.alerting.storage.PostgresAlertRuleRepository;
+import com.cameleer.server.core.alerting.AlertRuleRepository;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.jdbc.core.JdbcTemplate;
+
+@Configuration
+public class AlertingBeanConfig {
+
+    @Bean
+    public AlertRuleRepository alertRuleRepository(JdbcTemplate jdbc, ObjectMapper om) {
+        return new PostgresAlertRuleRepository(jdbc, om);
+    }
+}
diff --git a/cameleer-server-app/src/main/java/com/cameleer/server/app/outbound/OutboundConnectionServiceImpl.java b/cameleer-server-app/src/main/java/com/cameleer/server/app/outbound/OutboundConnectionServiceImpl.java
index 6ce204c2..328a68e6 100644
--- a/cameleer-server-app/src/main/java/com/cameleer/server/app/outbound/OutboundConnectionServiceImpl.java
+++ b/cameleer-server-app/src/main/java/com/cameleer/server/app/outbound/OutboundConnectionServiceImpl.java
@@ -1,5 +1,6 @@
 package com.cameleer.server.app.outbound;
 
+import com.cameleer.server.core.alerting.AlertRuleRepository;
 import com.cameleer.server.core.outbound.OutboundConnection;
 import com.cameleer.server.core.outbound.OutboundConnectionRepository;
 import com.cameleer.server.core.outbound.OutboundConnectionService;
@@ -13,10 +14,15 @@ import java.util.UUID;
 public class OutboundConnectionServiceImpl implements OutboundConnectionService {
 
     private final OutboundConnectionRepository repo;
+    private final AlertRuleRepository ruleRepo;
     private final String tenantId;
 
-    public OutboundConnectionServiceImpl(OutboundConnectionRepository repo, String tenantId) {
+    public OutboundConnectionServiceImpl(
+            OutboundConnectionRepository repo,
+            AlertRuleRepository ruleRepo,
+            String tenantId) {
         this.repo = repo;
+        this.ruleRepo = ruleRepo;
         this.tenantId = tenantId;
     }
 
@@ -91,8 +97,7 @@ public class OutboundConnectionServiceImpl implements OutboundConnectionService
 
     @Override
     public List<UUID> rulesReferencing(UUID id) {
-        // Plan 01 stub. Plan 02 will wire this to AlertRuleRepository.
-        return List.of();
+        return ruleRepo.findRuleIdsByOutboundConnectionId(id);
     }
 
     private void assertNameUnique(String name, UUID excludingId) {
diff --git a/cameleer-server-app/src/main/java/com/cameleer/server/app/outbound/config/OutboundBeanConfig.java b/cameleer-server-app/src/main/java/com/cameleer/server/app/outbound/config/OutboundBeanConfig.java
index a4e9d8c8..bea1fab5 100644
--- a/cameleer-server-app/src/main/java/com/cameleer/server/app/outbound/config/OutboundBeanConfig.java
+++ b/cameleer-server-app/src/main/java/com/cameleer/server/app/outbound/config/OutboundBeanConfig.java
@@ -3,6 +3,7 @@ package com.cameleer.server.app.outbound.config;
 import com.cameleer.server.app.outbound.OutboundConnectionServiceImpl;
 import com.cameleer.server.app.outbound.crypto.SecretCipher;
 import com.cameleer.server.app.outbound.storage.PostgresOutboundConnectionRepository;
+import com.cameleer.server.core.alerting.AlertRuleRepository;
 import com.cameleer.server.core.outbound.OutboundConnectionRepository;
 import com.cameleer.server.core.outbound.OutboundConnectionService;
 import com.fasterxml.jackson.databind.ObjectMapper;
@@ -29,7 +30,8 @@ public class OutboundBeanConfig {
     @Bean
     public OutboundConnectionService outboundConnectionService(
             OutboundConnectionRepository repo,
+            AlertRuleRepository ruleRepo,
             @Value("${cameleer.server.tenant.id:default}") String tenantId) {
-        return new OutboundConnectionServiceImpl(repo, tenantId);
+        return new OutboundConnectionServiceImpl(repo, ruleRepo, tenantId);
     }
 }
diff --git a/cameleer-server-app/src/test/java/com/cameleer/server/app/outbound/OutboundConnectionServiceRulesReferencingIT.java b/cameleer-server-app/src/test/java/com/cameleer/server/app/outbound/OutboundConnectionServiceRulesReferencingIT.java
new file mode 100644
index 00000000..4adc7c87
--- /dev/null
+++ b/cameleer-server-app/src/test/java/com/cameleer/server/app/outbound/OutboundConnectionServiceRulesReferencingIT.java
@@ -0,0 +1,79 @@
+package com.cameleer.server.app.outbound;
+
+import com.cameleer.server.app.AbstractPostgresIT;
+import com.cameleer.server.app.alerting.storage.PostgresAlertRuleRepository;
+import com.cameleer.server.core.alerting.*;
+import com.cameleer.server.core.http.TrustMode;
+import com.cameleer.server.core.outbound.*;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.web.server.ResponseStatusException;
+
+import java.time.Instant;
+import java.util.List;
+import java.util.Map;
+import java.util.UUID;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
+
+class OutboundConnectionServiceRulesReferencingIT extends AbstractPostgresIT {
+
+    @Autowired OutboundConnectionService service;
+    @Autowired OutboundConnectionRepository repo;
+
+    private UUID envId;
+    private UUID connId;
+    private UUID ruleId;
+    private PostgresAlertRuleRepository ruleRepo;
+
+    @BeforeEach
+    void seed() {
+        ruleRepo = new PostgresAlertRuleRepository(jdbcTemplate, new ObjectMapper());
+        envId = UUID.randomUUID();
+        jdbcTemplate.update(
+            "INSERT INTO environments (id, slug, display_name) VALUES (?, ?, ?)",
+            envId, "env-" + UUID.randomUUID(), "Test Env");
+        jdbcTemplate.update(
+            "INSERT INTO users (user_id, provider, email) VALUES ('u-ref', 'local', 'a@b.test')" +
+            " ON CONFLICT (user_id) DO NOTHING");
+
+        var c = repo.save(new OutboundConnection(
+            UUID.randomUUID(), "default", "conn-" + UUID.randomUUID(), null,
+            "https://example.test", OutboundMethod.POST,
+            Map.of(), null, TrustMode.SYSTEM_DEFAULT, List.of(), null,
+            new OutboundAuth.None(), List.of(),
+            Instant.now(), "u-ref", Instant.now(), "u-ref"));
+        connId = c.id();
+
+        ruleId = UUID.randomUUID();
+        var rule = new AlertRule(
+            ruleId, envId, "r", null, AlertSeverity.WARNING, true,
+            ConditionKind.AGENT_STATE,
+            new AgentStateCondition(new AlertScope(null, null, null), "DEAD", 60),
+            60, 0, 60, "t", "m",
+            List.of(new WebhookBinding(UUID.randomUUID(), connId, null, Map.of())),
+            List.of(), Instant.now(), null, null, Map.of(),
+            Instant.now(), "u-ref", Instant.now(), "u-ref");
+        ruleRepo.save(rule);
+    }
+
+    @AfterEach
+    void cleanup() {
+        jdbcTemplate.update("DELETE FROM alert_rules WHERE id = ?", ruleId);
+        jdbcTemplate.update("DELETE FROM outbound_connections WHERE id = ?", connId);
+        jdbcTemplate.update("DELETE FROM environments WHERE id = ?", envId);
+        jdbcTemplate.update("DELETE FROM users WHERE user_id = 'u-ref'");
+    }
+
+    @Test
+    void deleteConnectionReferencedByRuleReturns409() {
+        assertThat(service.rulesReferencing(connId)).hasSize(1);
+        assertThatThrownBy(() -> service.delete(connId, "u-ref"))
+            .isInstanceOf(ResponseStatusException.class)
+            .hasMessageContaining("referenced by rules");
+    }
+}