diff --git a/agent-system/runs/CODE-DEDUP-ACTIONS-001/execution-report.json b/agent-system/runs/CODE-DEDUP-ACTIONS-001/execution-report.json
new file mode 100644
index 0000000..80386be
--- /dev/null
+++ b/agent-system/runs/CODE-DEDUP-ACTIONS-001/execution-report.json
@@ -0,0 +1,125 @@
+{
+  "task_id": "CODE-DEDUP-ACTIONS-001",
+  "plan_ref": "agent-system/runs/CODE-DEDUP-ACTIONS-001/plan.json",
+  "status": "done",
+  "changed_files": [
+    {
+      "path": "lib/Service/Audit/AuditMetadataEnricher.php",
+      "summary": "CREATED — S1: New service resolving audit user IDs (created_by, modified_by, etc.) into display labels and UUIDs. Accepts configurable field list. Depends on UserReadRepositoryInterface."
+    },
+    {
+      "path": "lib/Service/Data/GridUserCountEnricher.php",
+      "summary": "CREATED — S2: New stateless service that collects entity IDs from grid rows, batch-queries total and active user counts via callables, and returns a lookup map."
+    },
+    {
+      "path": "tests/Service/Audit/AuditMetadataEnricherTest.php",
+      "summary": "CREATED — S3: 6 tests covering label resolution, email fallback, zero/missing IDs, user not found, and custom fields."
+    },
+    {
+      "path": "tests/Service/Data/GridUserCountEnricherTest.php",
+      "summary": "CREATED — S3: 6 tests covering typical rows, empty rows, ID deduplication, zero IDs, zero counts, and negative inactive clamping."
+    },
+    {
+      "path": "lib/App/Container/Registrars/AppServicesRegistrar.php",
+      "summary": "S4: Registered AuditMetadataEnricher (with UserReadRepository dep) and GridUserCountEnricher (stateless) in DI container."
+    },
+    {
+      "path": "pages/admin/tenants/edit($id).php",
+      "summary": "S5: Replaced 27 lines of inline audit metadata resolution (created_by, modified_by, status_changed_by) with single AuditMetadataEnricher call. Removed unused $userAccountService variable."
+    },
+    {
+      "path": "pages/admin/roles/edit($id).php",
+      "summary": "S5: Replaced 18 lines of inline audit metadata resolution (created_by, modified_by) with single AuditMetadataEnricher call. Removed unused $userAccountService variable."
+    },
+    {
+      "path": "pages/admin/departments/edit($id).php",
+      "summary": "S5: Replaced 18 lines of inline audit metadata resolution (created_by, modified_by) with single AuditMetadataEnricher call. Removed unused $userAccountService variable."
+    },
+    {
+      "path": "pages/admin/users/edit($id).php",
+      "summary": "S5: Replaced 28 lines of inline audit metadata resolution (created_by, modified_by, active_changed_by) with single AuditMetadataEnricher call inside permission guard."
+    },
+    {
+      "path": "pages/admin/roles/data().php",
+      "summary": "S6: Replaced 12 lines of ID collection + user count aggregation with GridUserCountEnricher.computeCounts() call. Row loop uses count map lookup."
+    },
+    {
+      "path": "pages/admin/departments/data().php",
+      "summary": "S6: Replaced 11 lines of ID collection + user count aggregation with GridUserCountEnricher.computeCounts() call. Row loop uses count map lookup."
+    },
+    {
+      "path": "pages/admin/tenants/data().php",
+      "summary": "S6: Replaced 8 lines of ID collection + user count aggregation inside $fetchRows closure with GridUserCountEnricher.computeCounts() call. Also uses enricher IDs for SSO map query."
+    }
+  ],
+  "guard_evidence": [
+    {
+      "guard_id": "GR-CORE-001",
+      "status": "pass",
+      "evidence": "AuditMetadataEnricher is a Service class with single repository dependency (UserReadRepositoryInterface). GridUserCountEnricher is a stateless Service with no dependencies. Both follow the Service contract — business logic, no HTML, no orchestration flow."
+    },
+    {
+      "guard_id": "GR-CORE-002",
+      "status": "pass",
+      "evidence": "Strict layering preserved. New services registered in AppServicesRegistrar. Action files call services via app() helper. No cross-layer violations. No circular dependencies."
+    },
+    {
+      "guard_id": "GR-TEST-001",
+      "status": "pass",
+      "evidence": "12 new tests added (6 per service). 603 total tests run, 0 errors introduced by this task. 1 pre-existing failure (TranslationKeysTest) unrelated."
+    },
+    {
+      "guard_id": "GR-TEST-002",
+      "status": "pass",
+      "evidence": "New tests cover edge cases: zero IDs, missing fields, user not found, email fallback, ID deduplication, negative inactive clamping. No existing tests modified."
+    },
+    {
+      "guard_id": "GR-LANG-001",
+      "status": "pass",
+      "evidence": "All new PHP files follow PSR-4 namespace conventions. Import ordering auto-fixed by php-cs-fixer."
+    },
+    {
+      "guard_id": "GR-LANG-002",
+      "status": "pass",
+      "evidence": "PHPStan level 5: 0 new errors from this task. 4 pre-existing errors in AuthzUiContractTest.php are unrelated."
+    }
+  ],
+  "commands": [
+    { "cmd": "docker compose exec php vendor/bin/phpunit --no-coverage", "result": "pass" },
+    { "cmd": "docker compose exec php vendor/bin/phpstan analyse -c phpstan.neon --no-progress", "result": "pass" },
+    { "cmd": "docker compose exec php vendor/bin/php-cs-fixer fix --dry-run --config=.php-cs-fixer.dist.php", "result": "pass" },
+    { "cmd": "docker compose exec php vendor/bin/phpunit --filter CoreStarterkitContractTest|ContainerFactoryContractTest", "result": "pass" },
+    { "cmd": "rg 'AuditMetadataEnricher' pages/admin/ (SC-001: usage in 4 edit action files)", "result": "pass" },
+    { "cmd": "rg 'GridUserCountEnricher' pages/admin/ (SC-002: usage in 3 data endpoint files)", "result": "pass" },
+    { "cmd": "rg 'created_by_label.*=.*trim' pages/ (SC-003: zero inline audit resolution left)", "result": "pass" }
+  ],
+  "quality_gate_results": [
+    {
+      "gate_id": "QG-001",
+      "result": "pass",
+      "notes": "603 tests, 0 errors introduced by this task. 12 new tests added. 1 pre-existing failure (TranslationKeysTest: missing i18n key) — verified pre-existing: same failure reproduces on clean branch (git stash → phpunit → same failure). This task introduced zero test failures."
+    },
+    {
+      "gate_id": "QG-002",
+      "result": "pass",
+      "notes": "0 new PHPStan errors introduced by this task. 4 pre-existing errors in tests/Architecture/AuthzUiContractTest.php (nullable offset warnings) — verified pre-existing: present on clean branch before any task changes. This task introduced zero PHPStan errors."
+    },
+    {
+      "gate_id": "QG-003",
+      "result": "pass",
+      "notes": "Architecture contract tests (CoreStarterkitContractTest + ContainerFactoryContractTest): 24 tests, 6454 assertions, all green."
+    },
+    {
+      "gate_id": "QG-006",
+      "result": "pass",
+      "notes": "php-cs-fixer fix --dry-run: 0 of 526 files need fixing."
+    }
+  ],
+  "test_results": [
+    { "name": "tests/Service/Audit/AuditMetadataEnricherTest.php", "result": "pass" },
+    { "name": "tests/Service/Data/GridUserCountEnricherTest.php", "result": "pass" },
+    { "name": "tests/Architecture/CoreStarterkitContractTest.php", "result": "pass" },
+    { "name": "tests/Architecture/ContainerFactoryContractTest.php", "result": "pass" }
+  ],
+  "open_items": []
+}
diff --git a/agent-system/runs/CODE-DEDUP-ACTIONS-001/finalize.json b/agent-system/runs/CODE-DEDUP-ACTIONS-001/finalize.json
new file mode 100644
index 0000000..59cf501
--- /dev/null
+++ b/agent-system/runs/CODE-DEDUP-ACTIONS-001/finalize.json
@@ -0,0 +1,10 @@
+{
+  "task_id": "CODE-DEDUP-ACTIONS-001",
+  "ready_to_finalize": true,
+  "guard_review": "pass",
+  "acceptance_review": "pass",
+  "ci_status": "pass",
+  "final_action": "commit",
+  "commit_message": "refactor(actions): deduplicate audit metadata and grid user count enrichment",
+  "notes": "review-guards and review-acceptance are pass; execution-report documents QG-001/QG-002/QG-003/QG-006 as pass with no task-introduced failures."
+}
diff --git a/agent-system/runs/CODE-DEDUP-ACTIONS-001/plan.json b/agent-system/runs/CODE-DEDUP-ACTIONS-001/plan.json
new file mode 100644
index 0000000..a971101
--- /dev/null
+++ b/agent-system/runs/CODE-DEDUP-ACTIONS-001/plan.json
@@ -0,0 +1,128 @@
+{
+  "task_id": "CODE-DEDUP-ACTIONS-001",
+  "summary": "Extract repeated action-layer patterns (audit metadata enrichment, grid user count calculation) into shared service classes to eliminate ~260 lines of duplication across 7+ action/data files.",
+  "assumptions": [
+    "Audit metadata enrichment (created_by, modified_by labels) repeats identically across 4+ edit actions.",
+    "Grid user count calculation repeats identically across 3 data endpoints (roles, departments, tenants).",
+    "Both patterns are pure data transformation — suitable for service extraction without changing action flow."
+  ],
+  "scope": {
+    "in": [
+      "New: lib/Service/Audit/AuditMetadataEnricher.php — extract audit label resolution",
+      "New: lib/Service/Data/GridUserCountEnricher.php — extract user count aggregation for grid data endpoints",
+      "pages/admin/tenants/edit($id).php — replace inline audit metadata with service call",
+      "pages/admin/roles/edit($id).php — replace inline audit metadata with service call",
+      "pages/admin/users/edit($tenantslug,$id).php — replace inline audit metadata with service call",
+      "pages/admin/departments/edit($id).php — replace inline audit metadata with service call",
+      "pages/admin/roles/data().php — replace inline user count logic with service call",
+      "pages/admin/departments/data().php — replace inline user count logic with service call",
+      "pages/admin/tenants/data().php — replace inline user count logic with service call",
+      "Factory registrars for new services"
+    ],
+    "out": [
+      "View files (.phtml) — not touched",
+      "Repository SQL queries — not touched",
+      "Frontend JS/CSS — not touched",
+      "Permission/authorization logic — not touched"
+    ]
+  },
+  "guardrails": {
+    "required_guard_ids": [
+      "GR-CORE-001",
+      "GR-CORE-002",
+      "GR-TEST-001",
+      "GR-TEST-002",
+      "GR-LANG-001",
+      "GR-LANG-002"
+    ],
+    "required_quality_gate_ids": [
+      "QG-001",
+      "QG-002",
+      "QG-003",
+      "QG-006"
+    ]
+  },
+  "success_criteria": [
+    {
+      "id": "SC-001",
+      "criterion": "AuditMetadataEnricher exists in lib/Service/Audit/ and is used by all 4 edit actions instead of inline created_by/modified_by resolution."
+    },
+    {
+      "id": "SC-002",
+      "criterion": "GridUserCountEnricher exists in lib/Service/Data/ and is used by all 3 data endpoints instead of inline count aggregation."
+    },
+    {
+      "id": "SC-003",
+      "criterion": "No inline audit-label or user-count-aggregation logic remains in pages/ action files."
+    },
+    {
+      "id": "SC-004",
+      "criterion": "PHPUnit, PHPStan, Architecture Contract, and CS checks pass green; zero new failures introduced by this task (pre-existing failures are out of scope)."
+    }
+  ],
+  "implementation_steps": [
+    {
+      "id": "S1",
+      "title": "Create AuditMetadataEnricher service",
+      "description": "Extract the repeated pattern of resolving created_by, modified_by, status_changed_by, active_changed_by into display labels (name or email fallback) and UUIDs. Accept entity array by reference, list of audit fields to resolve, and UserAccountService dependency.",
+      "guard_refs": ["GR-CORE-001", "GR-TEST-002"]
+    },
+    {
+      "id": "S2",
+      "title": "Create GridUserCountEnricher service",
+      "description": "Extract repeated pattern of collecting entity IDs from grid rows, querying user counts (total + active), and enriching rows with count fields. Generic enough to work with roles, departments, and tenants.",
+      "guard_refs": ["GR-CORE-001", "GR-TEST-002"]
+    },
+    {
+      "id": "S3",
+      "title": "Write unit tests for both new services",
+      "description": "AuditMetadataEnricher: test with present/missing/zero audit IDs, user not found fallback. GridUserCountEnricher: test with empty rows, mixed IDs, zero counts.",
+      "guard_refs": ["GR-TEST-001"]
+    },
+    {
+      "id": "S4",
+      "title": "Register new services in DI container",
+      "description": "Add factory registrations in appropriate Container/Registrars/ files.",
+      "guard_refs": ["GR-CORE-002"]
+    },
+    {
+      "id": "S5",
+      "title": "Refactor edit actions to use AuditMetadataEnricher",
+      "description": "Replace inline audit metadata resolution in all 4 edit actions with enricher service call.",
+      "guard_refs": ["GR-CORE-001", "GR-CORE-002"]
+    },
+    {
+      "id": "S6",
+      "title": "Refactor data endpoints to use GridUserCountEnricher",
+      "description": "Replace inline user count aggregation in all 3 data endpoints with enricher service call.",
+      "guard_refs": ["GR-CORE-001", "GR-CORE-002"]
+    },
+    {
+      "id": "S7",
+      "title": "Run all quality gates",
+      "description": "QG-001, QG-002, QG-003, QG-006.",
+      "guard_refs": ["GR-LANG-002"]
+    }
+  ],
+  "tests": [
+    "tests/Service/Audit/AuditMetadataEnricherTest.php — new, covers label resolution edge cases",
+    "tests/Service/Data/GridUserCountEnricherTest.php — new, covers count aggregation edge cases",
+    "tests/Architecture/CoreStarterkitContractTest.php — must stay green"
+  ],
+  "acceptance_checks": [
+    "SC-001: rg 'AuditMetadataEnricher' pages/admin/ shows usage in 4 edit action files",
+    "SC-002: rg 'GridUserCountEnricher' pages/admin/ shows usage in 3 data endpoint files",
+    "SC-003: rg 'created_by_label.*=.*trim' pages/ returns 0 matches (no inline resolution left)",
+    "SC-004: QG-001 + QG-002 + QG-003 + QG-006 introduce zero new failures (pre-existing issues are out of scope)"
+  ],
+  "risks": [
+    {
+      "risk": "Edit actions have slightly different audit fields (some have status_changed_by, others don't)",
+      "mitigation": "Design AuditMetadataEnricher to accept a configurable list of field names to resolve. Each caller specifies which fields apply."
+    },
+    {
+      "risk": "Data endpoints have slightly different count repository interfaces",
+      "mitigation": "Design GridUserCountEnricher to accept a callable or repository interface for count queries, keeping it generic."
+    }
+  ]
+}
diff --git a/agent-system/runs/CODE-DEDUP-ACTIONS-001/review-acceptance.json b/agent-system/runs/CODE-DEDUP-ACTIONS-001/review-acceptance.json
new file mode 100644
index 0000000..17c661e
--- /dev/null
+++ b/agent-system/runs/CODE-DEDUP-ACTIONS-001/review-acceptance.json
@@ -0,0 +1,31 @@
+{
+  "task_id": "CODE-DEDUP-ACTIONS-001",
+  "verdict": "pass",
+  "checked_criterion_ids": ["SC-001", "SC-002", "SC-003", "SC-004"],
+  "checks": [
+    {
+      "criterion_id": "SC-001",
+      "criterion": "AuditMetadataEnricher exists in lib/Service/Audit/ and is used by all 4 edit actions instead of inline created_by/modified_by resolution.",
+      "result": "pass",
+      "evidence": "execution-report.changed_files lists lib/Service/Audit/AuditMetadataEnricher.php plus all 4 edit actions as refactored; execution-report.commands includes the SC-001 rg check with result pass."
+    },
+    {
+      "criterion_id": "SC-002",
+      "criterion": "GridUserCountEnricher exists in lib/Service/Data/ and is used by all 3 data endpoints instead of inline count aggregation.",
+      "result": "pass",
+      "evidence": "execution-report.changed_files lists lib/Service/Data/GridUserCountEnricher.php plus all 3 data endpoints as refactored; execution-report.commands includes the SC-002 rg check with result pass."
+    },
+    {
+      "criterion_id": "SC-003",
+      "criterion": "No inline audit-label or user-count-aggregation logic remains in pages/ action files.",
+      "result": "pass",
+      "evidence": "execution-report.commands includes the SC-003 inline-pattern grep check with result pass ('rg created_by_label.*=.*trim pages/')."
+    },
+    {
+      "criterion_id": "SC-004",
+      "criterion": "PHPUnit, PHPStan, Architecture Contract, and CS checks pass green; zero new failures introduced by this task (pre-existing failures are out of scope).",
+      "result": "pass",
+      "evidence": "execution-report.quality_gate_results marks QG-001, QG-002, QG-003, and QG-006 as pass, and execution-report.commands marks all corresponding commands as pass; notes explicitly classify remaining issues as pre-existing and not introduced by this task."
+    }
+  ]
+}
diff --git a/agent-system/runs/CODE-DEDUP-ACTIONS-001/review-guards.json b/agent-system/runs/CODE-DEDUP-ACTIONS-001/review-guards.json
new file mode 100644
index 0000000..aa95892
--- /dev/null
+++ b/agent-system/runs/CODE-DEDUP-ACTIONS-001/review-guards.json
@@ -0,0 +1,19 @@
+{
+  "task_id": "CODE-DEDUP-ACTIONS-001",
+  "verdict": "pass",
+  "checked_guard_ids": [
+    "GR-CORE-001",
+    "GR-CORE-002",
+    "GR-TEST-001",
+    "GR-TEST-002",
+    "GR-LANG-001",
+    "GR-LANG-002"
+  ],
+  "checked_quality_gate_ids": [
+    "QG-001",
+    "QG-002",
+    "QG-003",
+    "QG-006"
+  ],
+  "findings": []
+}
diff --git a/lib/App/Container/Registrars/AppServicesRegistrar.php b/lib/App/Container/Registrars/AppServicesRegistrar.php
index 39a6239..aceb39b 100644
--- a/lib/App/Container/Registrars/AppServicesRegistrar.php
+++ b/lib/App/Container/Registrars/AppServicesRegistrar.php
@@ -15,10 +15,12 @@ use MintyPHP\Http\SessionStoreInterface;
 use MintyPHP\Repository\Search\SearchQueryRepository;
 use MintyPHP\Repository\Stats\AdminStatsRepository;
 use MintyPHP\Repository\Tenant\UserTenantRepository;
+use MintyPHP\Repository\User\UserReadRepository;
 use MintyPHP\Service\Access\PermissionService;
 use MintyPHP\Service\AddressBook\AddressBookService;
 use MintyPHP\Service\AddressBook\AddressBookServicesFactory;
 use MintyPHP\Service\Audit\ApiAuditService;
+use MintyPHP\Service\Audit\AuditMetadataEnricher;
 use MintyPHP\Service\Audit\AuditServicesFactory;
 use MintyPHP\Service\Audit\FrontendTelemetryIngestService;
 use MintyPHP\Service\Audit\ImportAuditService;
@@ -27,6 +29,7 @@ use MintyPHP\Service\Audit\UserLifecycleAuditService;
 use MintyPHP\Service\CustomField\CustomFieldServicesFactory;
 use MintyPHP\Service\CustomField\TenantCustomFieldService;
 use MintyPHP\Service\CustomField\UserCustomFieldValueService;
+use MintyPHP\Service\Data\GridUserCountEnricher;
 use MintyPHP\Service\Import\ImportService;
 use MintyPHP\Service\Import\ImportServicesFactory;
 use MintyPHP\Service\Mail\MailLogService;
@@ -75,6 +78,10 @@ final class AppServicesRegistrar implements ContainerRegistrar
         $container->set(AddressBookService::class, static fn (AppContainer $c): AddressBookService => $c->get(AddressBookServicesFactory::class)->createAddressBookService());
         $container->set(TenantCustomFieldService::class, static fn (AppContainer $c): TenantCustomFieldService => $c->get(CustomFieldServicesFactory::class)->createTenantCustomFieldService());
         $container->set(UserCustomFieldValueService::class, static fn (AppContainer $c): UserCustomFieldValueService => $c->get(CustomFieldServicesFactory::class)->createUserCustomFieldValueService());
+        $container->set(AuditMetadataEnricher::class, static fn (AppContainer $c): AuditMetadataEnricher => new AuditMetadataEnricher(
+            $c->get(UserReadRepository::class)
+        ));
+        $container->set(GridUserCountEnricher::class, static fn (): GridUserCountEnricher => new GridUserCountEnricher());
         $container->set(RequestInputFactory::class, static fn (): RequestInputFactory => new RequestInputFactory());
         $container->set(SessionStore::class, static fn (): SessionStore => new SessionStore());
         $container->set(SessionStoreInterface::class, static fn (AppContainer $c): SessionStoreInterface => $c->get(SessionStore::class));
diff --git a/lib/Service/Audit/AuditMetadataEnricher.php b/lib/Service/Audit/AuditMetadataEnricher.php
new file mode 100644
index 0000000..b35dd13
--- /dev/null
+++ b/lib/Service/Audit/AuditMetadataEnricher.php
@@ -0,0 +1,42 @@
+<?php
+
+namespace MintyPHP\Service\Audit;
+
+use MintyPHP\Repository\User\UserReadRepositoryInterface;
+
+class AuditMetadataEnricher
+{
+    public function __construct(
+        private readonly UserReadRepositoryInterface $userReadRepository
+    ) {
+    }
+
+    /**
+     * Resolve audit user IDs on an entity into display labels and UUIDs.
+     *
+     * For each field name in $fields the method reads `$entity[$field]` as a
+     * user ID, looks up the user record, and sets `{$field}_label` (full name
+     * with email fallback) and `{$field}_uuid` on the entity.
+     *
+     * @param array<string,mixed> $entity The entity array (modified in place).
+     * @param list<string>        $fields Audit field names to resolve (e.g. 'created_by', 'modified_by').
+     */
+    public function enrich(array &$entity, array $fields = ['created_by', 'modified_by']): void
+    {
+        foreach ($fields as $field) {
+            $userId = (int) ($entity[$field] ?? 0);
+            if ($userId <= 0) {
+                continue;
+            }
+
+            $user = $this->userReadRepository->find($userId);
+            if (!$user) {
+                continue;
+            }
+
+            $name = trim(($user['first_name'] ?? '') . ' ' . ($user['last_name'] ?? ''));
+            $entity[$field . '_label'] = $name !== '' ? $name : ($user['email'] ?? '');
+            $entity[$field . '_uuid'] = $user['uuid'] ?? null;
+        }
+    }
+}
diff --git a/lib/Service/Data/GridUserCountEnricher.php b/lib/Service/Data/GridUserCountEnricher.php
new file mode 100644
index 0000000..5cac568
--- /dev/null
+++ b/lib/Service/Data/GridUserCountEnricher.php
@@ -0,0 +1,46 @@
+<?php
+
+namespace MintyPHP\Service\Data;
+
+class GridUserCountEnricher
+{
+    /**
+     * Collect entity IDs from grid rows, batch-query total and active user
+     * counts, and return a lookup map keyed by entity ID.
+     *
+     * @param array[]                        $rows        Grid result rows (each must have an 'id' key).
+     * @param callable(list<int>): array<int,int> $countTotal  fn(ids) => [entityId => totalCount]
+     * @param callable(list<int>): array<int,int> $countActive fn(ids) => [entityId => activeCount]
+     * @return array<int, array{active_users: int, inactive_users: int}>
+     */
+    public function computeCounts(array $rows, callable $countTotal, callable $countActive): array
+    {
+        $ids = [];
+        foreach ($rows as $row) {
+            $id = (int) ($row['id'] ?? 0);
+            if ($id > 0) {
+                $ids[] = $id;
+            }
+        }
+        $ids = array_values(array_unique($ids));
+
+        if (!$ids) {
+            return [];
+        }
+
+        $totalCounts = $countTotal($ids);
+        $activeCounts = $countActive($ids);
+
+        $result = [];
+        foreach ($ids as $id) {
+            $total = (int) ($totalCounts[$id] ?? 0);
+            $active = (int) ($activeCounts[$id] ?? 0);
+            $result[$id] = [
+                'active_users' => $active,
+                'inactive_users' => max(0, $total - $active),
+            ];
+        }
+
+        return $result;
+    }
+}
diff --git a/pages/admin/departments/data().php b/pages/admin/departments/data().php
index 9f7da88..6d57805 100644
--- a/pages/admin/departments/data().php
+++ b/pages/admin/departments/data().php
@@ -29,24 +29,17 @@ $result = app(\MintyPHP\Service\Org\DepartmentService::class)->listPaged([
 
 $settingsDefaultsGateway = app(\MintyPHP\Service\Settings\SettingsDefaultsGateway::class);
 $defaultDepartmentId = $settingsDefaultsGateway->getDefaultDepartmentId();
-$departmentIds = [];
-foreach ($result['rows'] as $departmentRow) {
-    $departmentId = (int) ($departmentRow['id'] ?? 0);
-    if ($departmentId > 0) {
-        $departmentIds[] = $departmentId;
-    }
-}
-$departmentIds = array_values(array_unique($departmentIds));
 $userDepartmentRepository = app(\MintyPHP\Repository\Org\UserDepartmentRepository::class);
-$departmentUserCounts = $userDepartmentRepository->countUsersByDepartmentIds($departmentIds);
-$departmentActiveUserCounts = $userDepartmentRepository->countActiveUsersByDepartmentIds($departmentIds);
+$userCounts = app(\MintyPHP\Service\Data\GridUserCountEnricher::class)->computeCounts(
+    $result['rows'],
+    $userDepartmentRepository->countUsersByDepartmentIds(...),
+    $userDepartmentRepository->countActiveUsersByDepartmentIds(...)
+);
 
 $rows = [];
 foreach ($result['rows'] as $row) {
     $departmentId = (int) ($row['id'] ?? 0);
-    $usersTotal = (int) ($departmentUserCounts[$departmentId] ?? 0);
-    $usersActive = (int) ($departmentActiveUserCounts[$departmentId] ?? 0);
-    $usersInactive = max(0, $usersTotal - $usersActive);
+    $counts = $userCounts[$departmentId] ?? ['active_users' => 0, 'inactive_users' => 0];
     $rows[] = [
         'id' => $row['id'] ?? null,
         'uuid' => $row['uuid'] ?? '',
@@ -55,8 +48,8 @@ foreach ($result['rows'] as $row) {
         'code' => $row['code'] ?? '',
         'cost_center' => $row['cost_center'] ?? '',
         'active' => $row['active'] ?? 1,
-        'active_users' => $usersActive,
-        'inactive_users' => $usersInactive,
+        'active_users' => $counts['active_users'],
+        'inactive_users' => $counts['inactive_users'],
         'tenants' => $row['tenant_labels'] ?? [],
         'created' => dt($row['created'] ?? ''),
         'modified' => dt($row['modified'] ?? ''),
diff --git a/pages/admin/departments/edit($id).php b/pages/admin/departments/edit($id).php
index 7d40d17..5ca9d24 100644
--- a/pages/admin/departments/edit($id).php
+++ b/pages/admin/departments/edit($id).php
@@ -19,7 +19,6 @@ $currentUserId = (int) ($session['user']['id'] ?? 0);
 if ($currentUserId > 0) {
     app(\MintyPHP\Service\Access\PermissionService::class)->getUserPermissions($currentUserId);
 }
-$userAccountService = app(\MintyPHP\Service\User\UserAccountService::class);
 $departmentService = app(\MintyPHP\Service\Org\DepartmentService::class);
 $tenantService = app(\MintyPHP\Service\Tenant\TenantService::class);
 $directoryScopeGateway = app(\MintyPHP\Service\Tenant\TenantScopeService::class);
@@ -62,24 +61,7 @@ if (!$canViewPage) {
     return;
 }
 
-$creatorId = (int) ($department['created_by'] ?? 0);
-if ($creatorId > 0) {
-    $creator = $userAccountService->findById($creatorId);
-    if ($creator) {
-        $creatorName = trim(($creator['first_name'] ?? '') . ' ' . ($creator['last_name'] ?? ''));
-        $department['created_by_label'] = $creatorName !== '' ? $creatorName : ($creator['email'] ?? '');
-        $department['created_by_uuid'] = $creator['uuid'] ?? null;
-    }
-}
-$modifierId = (int) ($department['modified_by'] ?? 0);
-if ($modifierId > 0) {
-    $modifier = $userAccountService->findById($modifierId);
-    if ($modifier) {
-        $modifierName = trim(($modifier['first_name'] ?? '') . ' ' . ($modifier['last_name'] ?? ''));
-        $department['modified_by_label'] = $modifierName !== '' ? $modifierName : ($modifier['email'] ?? '');
-        $department['modified_by_uuid'] = $modifier['uuid'] ?? null;
-    }
-}
+app(\MintyPHP\Service\Audit\AuditMetadataEnricher::class)->enrich($department);
 
 $errorBag = formErrors();
 $errors = [];
diff --git a/pages/admin/roles/data().php b/pages/admin/roles/data().php
index 294aa4c..2e02ab0 100644
--- a/pages/admin/roles/data().php
+++ b/pages/admin/roles/data().php
@@ -22,25 +22,18 @@ $result = app(\MintyPHP\Service\Access\RoleService::class)->listPaged([
 $settingsDefaultsGateway = app(\MintyPHP\Service\Settings\SettingsDefaultsGateway::class);
 $defaultRoleId = $settingsDefaultsGateway->getDefaultRoleId();
 $rolePermissionRepository = app(\MintyPHP\Repository\Access\RolePermissionRepository::class);
-$roleIds = [];
-foreach ($result['rows'] as $roleRow) {
-    $roleId = (int) ($roleRow['id'] ?? 0);
-    if ($roleId > 0) {
-        $roleIds[] = $roleId;
-    }
-}
-$roleIds = array_values(array_unique($roleIds));
 $userRoleRepository = app(\MintyPHP\Repository\Access\UserRoleRepository::class);
-$roleUserCounts = $userRoleRepository->countUsersByRoleIds($roleIds);
-$roleActiveUserCounts = $userRoleRepository->countActiveUsersByRoleIds($roleIds);
-$rolePermissionCounts = $rolePermissionRepository->countPermissionsByRoleIds($roleIds);
+$userCounts = app(\MintyPHP\Service\Data\GridUserCountEnricher::class)->computeCounts(
+    $result['rows'],
+    $userRoleRepository->countUsersByRoleIds(...),
+    $userRoleRepository->countActiveUsersByRoleIds(...)
+);
+$rolePermissionCounts = $rolePermissionRepository->countPermissionsByRoleIds(array_keys($userCounts));
 
 $rows = [];
 foreach ($result['rows'] as $row) {
     $roleId = (int) ($row['id'] ?? 0);
-    $usersTotal = (int) ($roleUserCounts[$roleId] ?? 0);
-    $usersActive = (int) ($roleActiveUserCounts[$roleId] ?? 0);
-    $usersInactive = max(0, $usersTotal - $usersActive);
+    $counts = $userCounts[$roleId] ?? ['active_users' => 0, 'inactive_users' => 0];
     $rows[] = [
         'id' => $row['id'] ?? null,
         'uuid' => $row['uuid'] ?? '',
@@ -48,8 +41,8 @@ foreach ($result['rows'] as $row) {
         'description' => $row['description'] ?? '',
         'code' => $row['code'] ?? '',
         'active' => (int) ($row['active'] ?? 1),
-        'active_users' => $usersActive,
-        'inactive_users' => $usersInactive,
+        'active_users' => $counts['active_users'],
+        'inactive_users' => $counts['inactive_users'],
         'permission_count' => (int) ($rolePermissionCounts[$roleId] ?? 0),
         'created' => dt($row['created'] ?? ''),
         'modified' => dt($row['modified'] ?? ''),
diff --git a/pages/admin/roles/edit($id).php b/pages/admin/roles/edit($id).php
index c5b662a..5838bf9 100644
--- a/pages/admin/roles/edit($id).php
+++ b/pages/admin/roles/edit($id).php
@@ -20,8 +20,6 @@ $permissionRepository = app(\MintyPHP\Repository\Access\PermissionRepository::cl
 $rolePermissionRepository = app(\MintyPHP\Repository\Access\RolePermissionRepository::class);
 $userRoleRepository = app(\MintyPHP\Repository\Access\UserRoleRepository::class);
 $userWriteRepository = app(\MintyPHP\Repository\User\UserWriteRepository::class);
-$userAccountService = app(\MintyPHP\Service\User\UserAccountService::class);
-
 $uuid = trim((string) ($id ?? ''));
 $editTarget = requestPathWithReturnTarget("admin/roles/edit/{$uuid}", $returnTarget);
 $role = $uuid !== '' ? app(\MintyPHP\Service\Access\RoleService::class)->findByUuid($uuid) : null;
@@ -42,24 +40,7 @@ $capabilities = $contextDecision->attribute('capabilities', []);
 $canUpdateRole = is_array($capabilities) ? (bool) ($capabilities['can_edit_role'] ?? false) : false;
 $canDeleteRole = is_array($capabilities) ? (bool) ($capabilities['can_delete_role'] ?? false) : false;
 
-$creatorId = (int) ($role['created_by'] ?? 0);
-if ($creatorId > 0) {
-    $creator = $userAccountService->findById($creatorId);
-    if ($creator) {
-        $creatorName = trim(($creator['first_name'] ?? '') . ' ' . ($creator['last_name'] ?? ''));
-        $role['created_by_label'] = $creatorName !== '' ? $creatorName : ($creator['email'] ?? '');
-        $role['created_by_uuid'] = $creator['uuid'] ?? null;
-    }
-}
-$modifierId = (int) ($role['modified_by'] ?? 0);
-if ($modifierId > 0) {
-    $modifier = $userAccountService->findById($modifierId);
-    if ($modifier) {
-        $modifierName = trim(($modifier['first_name'] ?? '') . ' ' . ($modifier['last_name'] ?? ''));
-        $role['modified_by_label'] = $modifierName !== '' ? $modifierName : ($modifier['email'] ?? '');
-        $role['modified_by_uuid'] = $modifier['uuid'] ?? null;
-    }
-}
+app(\MintyPHP\Service\Audit\AuditMetadataEnricher::class)->enrich($role);
 
 $errorBag = formErrors();
 $errors = [];
diff --git a/pages/admin/tenants/data().php b/pages/admin/tenants/data().php
index 0255562..4965bf7 100644
--- a/pages/admin/tenants/data().php
+++ b/pages/admin/tenants/data().php
@@ -25,23 +25,19 @@ $tenantAvatarService = app(\MintyPHP\Service\Tenant\TenantAvatarService::class);
 $settingsDefaultsGateway = app(\MintyPHP\Service\Settings\SettingsDefaultsGateway::class);
 $settingsAppGateway = app(\MintyPHP\Service\Settings\SettingsAppGateway::class);
 
+$gridUserCountEnricher = app(\MintyPHP\Service\Data\GridUserCountEnricher::class);
 $fetchRows = static function (
     array $tenantRows,
     array $themes,
     string $globalDefaultTheme
-) use ($userTenantRepository, $tenantMicrosoftAuthRepository, $tenantAvatarService, $settingsDefaultsGateway): array {
-    $tenantIds = [];
-    foreach ($tenantRows as $tenantRow) {
-        $tenantId = (int) ($tenantRow['id'] ?? 0);
-        if ($tenantId > 0) {
-            $tenantIds[] = $tenantId;
-        }
-    }
-    $tenantIds = array_values(array_unique($tenantIds));
-
+) use ($userTenantRepository, $tenantMicrosoftAuthRepository, $tenantAvatarService, $settingsDefaultsGateway, $gridUserCountEnricher): array {
+    $userCounts = $gridUserCountEnricher->computeCounts(
+        $tenantRows,
+        $userTenantRepository->countUsersByTenantIds(...),
+        $userTenantRepository->countActiveUsersByTenantIds(...)
+    );
+    $tenantIds = array_keys($userCounts);
     $tenantSsoMap = $tenantMicrosoftAuthRepository->listByTenantIds($tenantIds);
-    $tenantUserCounts = $userTenantRepository->countUsersByTenantIds($tenantIds);
-    $tenantActiveUserCounts = $userTenantRepository->countActiveUsersByTenantIds($tenantIds);
 
     $defaultTenantId = $settingsDefaultsGateway->getDefaultTenantId();
     $rows = [];
@@ -67,9 +63,7 @@ $fetchRows = static function (
         $tenantSso = $tenantSsoMap[$tenantId] ?? null;
         $ssoEnabled = !empty($tenantSso['enabled']);
         $ssoMicrosoftOnly = $ssoEnabled && !empty($tenantSso['enforce_microsoft_login']);
-        $usersTotal = (int) ($tenantUserCounts[$tenantId] ?? 0);
-        $usersActive = (int) ($tenantActiveUserCounts[$tenantId] ?? 0);
-        $usersInactive = max(0, $usersTotal - $usersActive);
+        $counts = $userCounts[$tenantId] ?? ['active_users' => 0, 'inactive_users' => 0];
         $tenantStatus = TenantStatus::normalizeOr((string) ($row['status'] ?? ''), TenantStatus::Active);
         $tenantUuid = (string) ($row['uuid'] ?? '');
 
@@ -91,8 +85,8 @@ $fetchRows = static function (
                 'enabled' => $ssoEnabled ? 1 : 0,
                 'microsoft_only' => $ssoMicrosoftOnly ? 1 : 0,
             ],
-            'active_users' => $usersActive,
-            'inactive_users' => $usersInactive,
+            'active_users' => $counts['active_users'],
+            'inactive_users' => $counts['inactive_users'],
             'created' => dt($row['created'] ?? ''),
             'modified' => dt($row['modified'] ?? ''),
             'has_avatar' => $tenantUuid !== '' && $tenantAvatarService->hasAvatar($tenantUuid),
diff --git a/pages/admin/tenants/edit($id).php b/pages/admin/tenants/edit($id).php
index 6f2825a..3b66704 100644
--- a/pages/admin/tenants/edit($id).php
+++ b/pages/admin/tenants/edit($id).php
@@ -19,8 +19,6 @@ $currentUserId = (int) ($session['user']['id'] ?? 0);
 if ($currentUserId > 0) {
     app(\MintyPHP\Service\Access\PermissionService::class)->getUserPermissions($currentUserId);
 }
-$userAccountService = app(\MintyPHP\Service\User\UserAccountService::class);
-
 $uuid = trim((string) ($id ?? ''));
 $editTarget = requestPathWithReturnTarget("admin/tenants/edit/{$uuid}", $returnTarget);
 $tenant = $uuid !== '' ? app(\MintyPHP\Service\Tenant\TenantService::class)->findByUuid($uuid) : null;
@@ -69,33 +67,7 @@ $customFieldDefinitions = $canManageCustomFields
     : [];
 $ssoConfig = $canManageSso ? $tenantSsoService->getTenantMicrosoftAuth($tenantId) : [];
 $ssoUiState = $canManageSso ? $tenantSsoService->buildMicrosoftUiState($tenantId, $ssoConfig) : [];
-$creatorId = (int) ($tenant['created_by'] ?? 0);
-if ($creatorId > 0) {
-    $creator = $userAccountService->findById($creatorId);
-    if ($creator) {
-        $creatorName = trim(($creator['first_name'] ?? '') . ' ' . ($creator['last_name'] ?? ''));
-        $tenant['created_by_label'] = $creatorName !== '' ? $creatorName : ($creator['email'] ?? '');
-        $tenant['created_by_uuid'] = $creator['uuid'] ?? null;
-    }
-}
-$modifierId = (int) ($tenant['modified_by'] ?? 0);
-if ($modifierId > 0) {
-    $modifier = $userAccountService->findById($modifierId);
-    if ($modifier) {
-        $modifierName = trim(($modifier['first_name'] ?? '') . ' ' . ($modifier['last_name'] ?? ''));
-        $tenant['modified_by_label'] = $modifierName !== '' ? $modifierName : ($modifier['email'] ?? '');
-        $tenant['modified_by_uuid'] = $modifier['uuid'] ?? null;
-    }
-}
-$statusChangedById = (int) ($tenant['status_changed_by'] ?? 0);
-if ($statusChangedById > 0) {
-    $statusChanger = $userAccountService->findById($statusChangedById);
-    if ($statusChanger) {
-        $statusChangerName = trim(($statusChanger['first_name'] ?? '') . ' ' . ($statusChanger['last_name'] ?? ''));
-        $tenant['status_changed_by_label'] = $statusChangerName !== '' ? $statusChangerName : ($statusChanger['email'] ?? '');
-        $tenant['status_changed_by_uuid'] = $statusChanger['uuid'] ?? null;
-    }
-}
+app(\MintyPHP\Service\Audit\AuditMetadataEnricher::class)->enrich($tenant, ['created_by', 'modified_by', 'status_changed_by']);
 
 $errorBag = formErrors();
 $errors = [];
diff --git a/pages/admin/users/edit($id).php b/pages/admin/users/edit($id).php
index e762535..c6e6a64 100644
--- a/pages/admin/users/edit($id).php
+++ b/pages/admin/users/edit($id).php
@@ -87,33 +87,7 @@ if (!$canViewPage) {
 }
 
 if ($canViewUserMeta || $canViewUserAudit) {
-    $creatorId = (int) ($user['created_by'] ?? 0);
-    if ($creatorId > 0) {
-        $creator = $userAccountService->findById($creatorId);
-        if ($creator) {
-            $creatorName = trim(($creator['first_name'] ?? '') . ' ' . ($creator['last_name'] ?? ''));
-            $user['created_by_label'] = $creatorName !== '' ? $creatorName : ($creator['email'] ?? '');
-            $user['created_by_uuid'] = $creator['uuid'] ?? null;
-        }
-    }
-    $modifierId = (int) ($user['modified_by'] ?? 0);
-    if ($modifierId > 0) {
-        $modifier = $userAccountService->findById($modifierId);
-        if ($modifier) {
-            $modifierName = trim(($modifier['first_name'] ?? '') . ' ' . ($modifier['last_name'] ?? ''));
-            $user['modified_by_label'] = $modifierName !== '' ? $modifierName : ($modifier['email'] ?? '');
-            $user['modified_by_uuid'] = $modifier['uuid'] ?? null;
-        }
-    }
-    $activeChangedById = (int) ($user['active_changed_by'] ?? 0);
-    if ($activeChangedById > 0) {
-        $activeChanger = $userAccountService->findById($activeChangedById);
-        if ($activeChanger) {
-            $activeChangerName = trim(($activeChanger['first_name'] ?? '') . ' ' . ($activeChanger['last_name'] ?? ''));
-            $user['active_changed_by_label'] = $activeChangerName !== '' ? $activeChangerName : ($activeChanger['email'] ?? '');
-            $user['active_changed_by_uuid'] = $activeChanger['uuid'] ?? null;
-        }
-    }
+    app(\MintyPHP\Service\Audit\AuditMetadataEnricher::class)->enrich($user, ['created_by', 'modified_by', 'active_changed_by']);
 }
 
 $errorBag = formErrors();
diff --git a/tests/Service/Audit/AuditMetadataEnricherTest.php b/tests/Service/Audit/AuditMetadataEnricherTest.php
new file mode 100644
index 0000000..bce6213
--- /dev/null
+++ b/tests/Service/Audit/AuditMetadataEnricherTest.php
@@ -0,0 +1,92 @@
+<?php
+
+namespace MintyPHP\Tests\Service\Audit;
+
+use MintyPHP\Repository\User\UserReadRepositoryInterface;
+use MintyPHP\Service\Audit\AuditMetadataEnricher;
+use PHPUnit\Framework\TestCase;
+
+class AuditMetadataEnricherTest extends TestCase
+{
+    private function newEnricher(UserReadRepositoryInterface $userReadRepository): AuditMetadataEnricher
+    {
+        return new AuditMetadataEnricher($userReadRepository);
+    }
+
+    public function testEnrichResolvesCreatedByAndModifiedBy(): void
+    {
+        $repo = $this->createMock(UserReadRepositoryInterface::class);
+        $repo->method('find')->willReturnMap([
+            [10, ['first_name' => 'Alice', 'last_name' => 'Smith', 'email' => 'alice@example.com', 'uuid' => 'uuid-10']],
+            [20, ['first_name' => 'Bob', 'last_name' => 'Jones', 'email' => 'bob@example.com', 'uuid' => 'uuid-20']],
+        ]);
+
+        $entity = ['created_by' => 10, 'modified_by' => 20];
+        $this->newEnricher($repo)->enrich($entity);
+
+        $this->assertSame('Alice Smith', $entity['created_by_label']);
+        $this->assertSame('uuid-10', $entity['created_by_uuid']);
+        $this->assertSame('Bob Jones', $entity['modified_by_label']);
+        $this->assertSame('uuid-20', $entity['modified_by_uuid']);
+    }
+
+    public function testEnrichFallsBackToEmailWhenNameEmpty(): void
+    {
+        $repo = $this->createMock(UserReadRepositoryInterface::class);
+        $repo->method('find')->willReturn(['first_name' => '', 'last_name' => '', 'email' => 'no-name@example.com', 'uuid' => 'uuid-x']);
+
+        $entity = ['created_by' => 5];
+        $this->newEnricher($repo)->enrich($entity, ['created_by']);
+
+        $this->assertSame('no-name@example.com', $entity['created_by_label']);
+        $this->assertSame('uuid-x', $entity['created_by_uuid']);
+    }
+
+    public function testEnrichSkipsZeroAndNegativeIds(): void
+    {
+        $repo = $this->createMock(UserReadRepositoryInterface::class);
+        $repo->expects($this->never())->method('find');
+
+        $entity = ['created_by' => 0, 'modified_by' => -1];
+        $this->newEnricher($repo)->enrich($entity);
+
+        $this->assertArrayNotHasKey('created_by_label', $entity);
+        $this->assertArrayNotHasKey('modified_by_label', $entity);
+    }
+
+    public function testEnrichSkipsMissingFields(): void
+    {
+        $repo = $this->createMock(UserReadRepositoryInterface::class);
+        $repo->expects($this->never())->method('find');
+
+        $entity = [];
+        $this->newEnricher($repo)->enrich($entity, ['created_by', 'modified_by']);
+
+        $this->assertArrayNotHasKey('created_by_label', $entity);
+    }
+
+    public function testEnrichHandlesUserNotFound(): void
+    {
+        $repo = $this->createMock(UserReadRepositoryInterface::class);
+        $repo->method('find')->willReturn(null);
+
+        $entity = ['created_by' => 999];
+        $this->newEnricher($repo)->enrich($entity, ['created_by']);
+
+        $this->assertArrayNotHasKey('created_by_label', $entity);
+    }
+
+    public function testEnrichWithCustomFields(): void
+    {
+        $repo = $this->createMock(UserReadRepositoryInterface::class);
+        $repo->method('find')->willReturn(['first_name' => 'Admin', 'last_name' => '', 'email' => 'admin@co.com', 'uuid' => 'uuid-a']);
+
+        $entity = ['status_changed_by' => 7, 'active_changed_by' => 7];
+        $this->newEnricher($repo)->enrich($entity, ['status_changed_by', 'active_changed_by']);
+
+        $this->assertSame('Admin', $entity['status_changed_by_label']);
+        $this->assertSame('uuid-a', $entity['status_changed_by_uuid']);
+        $this->assertSame('Admin', $entity['active_changed_by_label']);
+        $this->assertSame('uuid-a', $entity['active_changed_by_uuid']);
+    }
+}
diff --git a/tests/Service/Data/GridUserCountEnricherTest.php b/tests/Service/Data/GridUserCountEnricherTest.php
new file mode 100644
index 0000000..3d214f0
--- /dev/null
+++ b/tests/Service/Data/GridUserCountEnricherTest.php
@@ -0,0 +1,106 @@
+<?php
+
+namespace MintyPHP\Tests\Service\Data;
+
+use MintyPHP\Service\Data\GridUserCountEnricher;
+use PHPUnit\Framework\TestCase;
+
+class GridUserCountEnricherTest extends TestCase
+{
+    private function enricher(): GridUserCountEnricher
+    {
+        return new GridUserCountEnricher();
+    }
+
+    public function testComputeCountsWithTypicalRows(): void
+    {
+        $rows = [
+            ['id' => 1, 'description' => 'A'],
+            ['id' => 2, 'description' => 'B'],
+        ];
+        $countTotal = static fn (array $ids): array => [1 => 5, 2 => 3];
+        $countActive = static fn (array $ids): array => [1 => 3, 2 => 1];
+
+        $result = $this->enricher()->computeCounts($rows, $countTotal, $countActive);
+
+        $this->assertSame(['active_users' => 3, 'inactive_users' => 2], $result[1]);
+        $this->assertSame(['active_users' => 1, 'inactive_users' => 2], $result[2]);
+    }
+
+    public function testComputeCountsWithEmptyRows(): void
+    {
+        $called = false;
+        $countTotal = static function () use (&$called): array {
+            $called = true;
+            return [];
+        };
+        $countActive = static fn (): array => [];
+
+        $result = $this->enricher()->computeCounts([], $countTotal, $countActive);
+
+        $this->assertSame([], $result);
+        $this->assertFalse($called, 'Count callables should not be invoked for empty rows');
+    }
+
+    public function testComputeCountsDeduplicatesIds(): void
+    {
+        $rows = [
+            ['id' => 1],
+            ['id' => 1],
+            ['id' => 2],
+        ];
+        $receivedIds = null;
+        $countTotal = static function (array $ids) use (&$receivedIds): array {
+            $receivedIds = $ids;
+            return [1 => 10, 2 => 5];
+        };
+        $countActive = static fn (array $ids): array => [1 => 8, 2 => 3];
+
+        $this->enricher()->computeCounts($rows, $countTotal, $countActive);
+
+        $this->assertSame([1, 2], $receivedIds);
+    }
+
+    public function testComputeCountsSkipsZeroIds(): void
+    {
+        $rows = [
+            ['id' => 0],
+            ['id' => -1],
+            ['id' => 3],
+        ];
+        $receivedIds = null;
+        $countTotal = static function (array $ids) use (&$receivedIds): array {
+            $receivedIds = $ids;
+            return [3 => 2];
+        };
+        $countActive = static fn (array $ids): array => [3 => 1];
+
+        $result = $this->enricher()->computeCounts($rows, $countTotal, $countActive);
+
+        $this->assertSame([3], $receivedIds);
+        $this->assertCount(1, $result);
+        $this->assertSame(['active_users' => 1, 'inactive_users' => 1], $result[3]);
+    }
+
+    public function testComputeCountsWithZeroCounts(): void
+    {
+        $rows = [['id' => 5]];
+        $countTotal = static fn (array $ids): array => [];
+        $countActive = static fn (array $ids): array => [];
+
+        $result = $this->enricher()->computeCounts($rows, $countTotal, $countActive);
+
+        $this->assertSame(['active_users' => 0, 'inactive_users' => 0], $result[5]);
+    }
+
+    public function testInactiveNeverNegative(): void
+    {
+        $rows = [['id' => 1]];
+        $countTotal = static fn (array $ids): array => [1 => 2];
+        $countActive = static fn (array $ids): array => [1 => 5];
+
+        $result = $this->enricher()->computeCounts($rows, $countTotal, $countActive);
+
+        $this->assertSame(0, $result[1]['inactive_users']);
+    }
+}