Complete persistence foundation

AGENTS.md

@@ -21,6 +21,24 @@ It must support circuits, device rows, project devices, drag-and-drop restructur
   `src/frontend/components/circuit-grid-*.ts` modules.
 - Critical multi-write commands use injected transaction repositories with real
   SQLite commit/rollback tests.
+- All supported runtime project-command stores, including full snapshot
+  restoration, share
+  `src/db/repositories/project-command-transaction.persistence.ts` for the
+  atomic domain-write, revision and history transition boundary. Its applied
+  forward-command variant preserves derived CircuitDeviceRow override metadata.
+- Low-level `appendProjectRevision` persistence is adapter-internal and tested
+  directly; do not reintroduce a standalone runtime revision repository.
+- Runtime domain services receive narrow reader/store dependencies explicitly;
+  concrete SQLite repositories are instantiated only under `src/server/composition`.
+- General application repositories also require an explicit `AppDatabase`;
+  `src/server/composition/application-repositories.ts` owns their runtime
+  instances, and controllers never import the global SQLite client.
+- The upgrade-only legacy migration service follows the same dependency rule;
+  its concrete repositories are instantiated only in
+  `scripts/db-migrate-legacy-consumers.ts`.
+- General Circuit, CircuitDeviceRow, CircuitList and DistributionBoard
+  repositories expose only active reads. Runtime writes belong in typed command
+  repositories; direct integration fixtures belong under `tests/support`.
 
 The supported runtime model is Circuit-First. The former Consumer UI and API are
 removed. Retained `consumers` rows, migration mappings and reports are upgrade-only
@@ -272,6 +290,11 @@ Distribution-board setup uses `distribution-board.insert` with a complete
 stable snapshot of the board, circuit list and four default sections. Its
 inverse removes only the same unchanged and still-empty structure; the POST
 route requires `expectedRevision` and returns the updated history state.
+Floor and room setup use `project-floor.insert` and `project-room.insert` with
+complete stable snapshots. Their inverses remove only unchanged records and
+reject floors with assigned rooms or rooms referenced by device rows or
+retained upgrade data. Both POST routes require `expectedRevision` and return
+the updated history state.
 
 Required operations:
 
@@ -341,6 +364,7 @@ For a normal code change run the relevant focused tests plus:
 - `npm test`
 - `npm run build:api`
 - `npm run build:web`
+- `npm run typecheck:scripts`
 - `npx tsc --noEmit -p tsconfig.next.json`
 
 Use a concise imperative commit message for each completed, verified work package.

docs/circuit-list-editor-api.md

@@ -190,6 +190,23 @@ returns HTTP `409` with `PROJECT_HISTORY_OPERATION_UNAVAILABLE`.
     structure; Redo restores the same ids
   - stale revisions return `409 PROJECT_REVISION_CONFLICT`
 
+### Project Floors and Rooms
+
+- `POST /projects/:projectId/floors`
+  - body: `{ "name": "EG", "expectedRevision": 13 }`
+  - executes `project-floor.insert` with a stable floor id
+  - response: `{ "floor": { ... }, "revision": { ... }, "history": { ... } }`
+- `POST /projects/:projectId/rooms`
+  - body:
+    `{ "floorId": "floor_1", "roomNumber": "001", "roomName": "Technik", "expectedRevision": 14 }`
+  - executes `project-room.insert` with a stable room id; `floorId` is optional
+    and must belong to the project when present
+  - response: `{ "room": { ... }, "revision": { ... }, "history": { ... } }`
+- Persistent Undo removes only unchanged, unreferenced records. A floor with
+  assigned rooms and a room referenced by device rows or retained upgrade data
+  are rejected instead of silently clearing foreign keys.
+- Stale revisions return `409 PROJECT_REVISION_CONFLICT`.
+
 ### Tree Endpoint
 
 - `GET /projects/:projectId/circuit-lists/:circuitListId/tree`

docs/current-architecture.md

@@ -47,6 +47,8 @@ liegt über einen Host-Mount außerhalb des Containers.
 - `src/frontend/utils/api.ts` – typisierte Frontend-API-Aufrufe
 - `src/server/index.ts` und `src/server/routes/` – API-Komposition
 - `src/domain/services/` – fachliche Command- und Synchronisierungsregeln
+- `src/server/composition/` – Verdrahtung fachlicher Services mit konkreten
+  SQLite-Repositories
 - `src/db/repositories/` – Abfragen, Persistenzmapper und Transaktionsadapter
 - `src/db/schema/` und `src/db/migrations/` – SQLite-Schema und Migrationen
 
@@ -66,11 +68,13 @@ Der Editor besitzt keinen sitzungslokalen Undo-/Redo-Stapel mehr. Beim initialen
 Laden und nach jedem Tree-Reload liest er den persistenten History-Status und
 gleicht dessen Revision mit `currentRevision` des Trees ab. Das Datenmodell
 besitzt einen projektbezogenen Revisionszähler sowie getrennte Revision-/Change-Set-
-Tabellen. Ein getestetes Repository kann diese Historienmetadaten optimistisch
+Tabellen. Eine direkt getestete Persistence-Funktion schreibt diese
-und atomar fortschreiben. Vorwärts- und Rückwärtskommandos besitzen einen
+Historienmetadaten innerhalb der zentralen Command-Transaktion optimistisch und
+atomar fort. Vorwärts- und Rückwärtskommandos besitzen einen
 versionierten, JSON-sicheren Umschlag; Typ und Payload können dadurch nach
 einem Neustart verlustfrei rekonstruiert werden. Alle aktuell unterstützten
-Circuit-, Gerätezeilen-, Projektgeräte- und Projekteinstellungsänderungen
+Circuit-, Gerätezeilen-, Projektgeräte-, Projektstruktur- und
+Projekteinstellungsänderungen
 verwenden typisierte Command-Stores, die Fachänderung, automatisch erzeugtes
 inverses Kommando, Revision und Historienstapel gemeinsam committen
 beziehungsweise zurückrollen.
@@ -83,6 +87,26 @@ absteigend paginierte Revisions-Timeline ist ohne Befehls-Payloads über
 `GET /api/projects/:projectId/history/revisions` lesbar. Ein zentraler
 Dispatcher führt die nachfolgend beschriebenen typisierten Kommandos über
 öffentliche Command-, Undo- und Redo-Endpunkte aus.
+Alle unterstützten Runtime-Project-Command-Stores einschließlich der
+vollständigen Snapshot-Wiederherstellung verwenden dabei
+`project-command-transaction.persistence.ts` als gemeinsame äußere
+Transaktionsgrenze. Sie führt Fachänderung, Revisions-Append und
+History-Transition in fester Reihenfolge innerhalb derselben SQLite-Transaktion
+aus. Für CircuitDeviceRow-Feldänderungen übernimmt eine typisierte Variante den
+während der Fachänderung um Override-Metadaten ergänzten Forward-Command. Die
+fachlichen Validierungs-, Forward- und Inversenregeln bleiben im jeweiligen
+Store.
+Die Low-Level-Funktion `appendProjectRevision` bleibt ein internes Detail dieser
+Persistenzgrenze und wird direkt mit einer realen SQLite-Transaktion getestet.
+Ein eigenständiges Runtime-Revisions-Repository existiert nicht.
+`ProjectDeviceSyncService` und `CircuitNumberingService` kennen nur schmale,
+fachlich benannte Reader-Interfaces. Ihre SQLite-Repositories werden
+ausschließlich in `src/server/composition/` erzeugt und injiziert.
+Auch die allgemeinen Projekt-, Geräte-, Raum-, Geschoss- und Circuit-
+Repositories verlangen einen expliziten `AppDatabase`-Kontext. Ihre
+Anwendungsinstanzen werden zentral in
+`src/server/composition/application-repositories.ts` erzeugt; Controller
+importieren weder den globalen SQLite-Client noch konkrete Repository-Klassen.
 `circuit-device-row.insert` und `circuit-device-row.delete` sind atomare
 Strukturkommandos. Beim Löschen wird die vollständige Zeile im inversen
 Kommando gesichert, sodass Undo dieselbe UUID und alle Fachwerte wiederherstellt.
@@ -198,6 +222,14 @@ Alle UUIDs entstehen vor dem Command und bleiben über Undo/Redo stabil.
 vollständig unveränderten, weiterhin stromkreislosen Block. Controller und
 Projektseite übergeben die erwartete Projektrevision; der frühere direkte
 Controller-Schreibweg ist entfernt.
+`project-floor.insert` und `project-room.insert` versionieren die Anlage von
+Geschossen und Räumen mit stabilen UUIDs. Die vollständigen Datensätze bilden
+jeweils die persistierte Inverse für Undo/Redo. Ein Geschoss wird durch Undo nur
+entfernt, solange ihm kein Raum zugeordnet wurde. Ein Raum wird nur entfernt,
+solange weder eine CircuitDeviceRow noch ein aufbewahrter Upgrade-Datensatz auf
+ihn verweist. Beide POST-Endpunkte verlangen `expectedRevision`, liefern den
+aktualisierten Historienstand und besitzen keinen direkten Create-Schreibweg
+mehr.
 
 ## Projektgeräte
 
@@ -220,8 +252,20 @@ Kopieren in ein Projekt erzeugt ein eigenständiges Projektgerät.
 - `npm run db:migrate` wendet Drizzle-Migrationen an.
 - `npm run db:verify:circuit-schema` prüft erforderliche und entfernte Spalten.
 - `npm run db:backup` erzeugt ein konsistentes und verifiziertes Online-Backup.
+- `npm run typecheck:scripts` prüft alle TypeScript-Wartungs- und
+  Upgrade-Skripte mit ihren Anwendungspfaden, ohne Code zu erzeugen.
 - Angewendete Migrationen werden niemals nachträglich verändert.
 - `db:migrate:legacy-consumers` ist Upgrade-Werkzeug, kein Anwendungspfad.
+  Der fachliche Migrationsdienst kennt nur schmale Reader-/Store-Ports unter
+  `src/domain/ports`; konkrete SQLite-Repositories werden ausschließlich im
+  CLI-Skript zusammengesetzt.
+- Allgemeine Circuit-, Gerätezeilen-, CircuitList- und DistributionBoard-
+  Repositories stellen im Anwendungspfad nur noch benötigte Leseabfragen bereit.
+  Fachliche Schreibvorgänge liegen in den typisierten Command-Repositories;
+  Upgrade-Schreibvorgänge bleiben in expliziten Migrationsadaptern.
+- Die vollständige Verteilungs-Testfixture liegt unter
+  `tests/support/distribution-board-fixture.ts` und ist kein exportierter
+  Produktions-Schreibweg.
 
 PostgreSQL ist bewusst nicht implementiert. Die Domainregeln und
 Transaktionsgrenzen sollen portabel bleiben; Schema und Betriebsmodell benötigen

docs/development-workflow.md

@@ -70,6 +70,7 @@ Beispiel `Preserve circuit blocks during filtering`.
 npm test
 npm run build:api
 npm run build:web
+npm run typecheck:scripts
 npx tsc --noEmit -p tsconfig.next.json
 git diff --check
 ```
@@ -83,6 +84,9 @@ Invoke-WebRequest http://localhost:3000/health
 ```
 
 Bei sichtbaren Editoränderungen ist außerdem ein kurzer GUI-Test erforderlich.
+Testaufbau, der vollständige Projektstrukturen direkt einfügt, gehört nach
+`tests/support`. Produktions-Repositories dürfen nicht nur für Testfixtures
+erneut direkte Schreibmethoden erhalten.
 
 ## Migrationen
 

docs/project-history-and-external-model-architecture.md

@@ -270,11 +270,18 @@ Completed foundation:
   list and default-section structure with stable ids; its delete inverse
   refuses changed or populated structures and the project-page POST tracks the
   returned revision
+- `project-floor.insert` and `project-room.insert` persist complete location
+  records with stable ids; their inverses reject changed or referenced records
+  so Undo never clears room assignments or device-row links implicitly
+- the floor and room POST routes require the current expected revision and the
+  project page tracks the returned history state
 
 Remaining constraints before completing project version history:
 
-- extend project-scoped commands only when further project mutations are
+- all current normal project-scoped runtime writes are behind the revision
-  deliberately added to history; the generic versioned envelope is complete
+  boundary; extend it whenever further project mutations are introduced
+- project creation remains initialization at revision zero, while global device
+  templates remain outside any single project history
 - do not model IFCGUID as an overloaded circuit equipment identifier
 - keep database backup/restore checks separate from project history tests
 

docs/spec/07-implementation-phases-todo.md

@@ -303,6 +303,8 @@ Acceptance criteria:
 
 ## Phase 11: Persistence and Transaction Foundation
 
+Status: Complete.
+
 Goal:
 
 Prepare the current SQLite implementation for persistent history and a later PostgreSQL adapter without changing user-facing behavior.
@@ -326,8 +328,9 @@ Implemented foundation:
 
 - database contexts can be created independently from the production singleton
 - SQLite foreign-key enforcement is enabled explicitly for every context
-- the distribution-board repository receives its database dependency explicitly
+- the read-only distribution-board repository receives its database dependency explicitly
-- distribution-board setup has real in-memory SQLite commit and rollback coverage using production migrations
+- distribution-board setup uses its persistent command repository with real
+  in-memory SQLite commit and rollback coverage using production migrations
 - database backups use SQLite's online backup API and include committed WAL data
 - every backup is opened independently and checked for integrity and foreign-key violations
 - an integration test restores the backup into a separate database and verifies its snapshot contents
@@ -339,9 +342,26 @@ Implemented foundation:
 - circuit-device-row transaction tests cover both successful commits and forced SQLite rollbacks
 - project-device row synchronization has real multi-row SQLite commit and rollback coverage
 - BMK swaps and section reorder have real SQLite commit and rollback coverage
-- the legacy consumer migration receives its database dependency at the script entry point
+- the legacy consumer migration service depends only on narrow domain ports;
+  all concrete repositories are composed at the script entry point
 - legacy circuit, row, mapping and report writes have real late-failure rollback coverage
 - circuit and device-row persistence value mapping is separated from the general repositories
+- obsolete direct Circuit, CircuitDeviceRow, CircuitList, DistributionBoard and
+  Project repository writes are removed; integration fixtures live under
+  `tests/support` instead of production repositories
+- all supported runtime project-command stores, including complete snapshot
+  restore, share one tested transaction wrapper for domain mutation, revision
+  append and history transition; its applied-forward variant retains derived
+  CircuitDeviceRow override metadata
+- low-level revision append persistence is tested directly; the unused
+  standalone runtime revision repository and store interface are removed
+- runtime project-device synchronization and circuit-numbering services depend
+  on narrow domain readers; server composition injects the SQLite repositories
+- all general application repositories require an explicit database context;
+  server composition owns their runtime instances and controllers contain no
+  direct global SQLite access
+- TypeScript maintenance and upgrade scripts have a dedicated no-emit
+  typecheck, including all referenced application modules
 - the legacy consumer UI and application read/write endpoints are removed after verified data cutover
 - retained legacy rows are accessible only through explicit database upgrade tooling
 - project devices no longer persist duplicate legacy power, phase, cosPhi or remark fields
@@ -451,6 +471,9 @@ Implemented foundation:
 - distribution-board setup uses `distribution-board.insert` with a complete
   stable board/list/default-section snapshot; Undo removes only an unchanged
   empty setup and the former direct controller write is removed
+- floor and room setup use `project-floor.insert` and `project-room.insert`
+  with stable ids; their inverses refuse assigned or referenced records and the
+  former direct repository create methods are removed
 - revision metadata, change-set payloads and the project counter are committed
   in one SQLite transaction
 - a stale expected revision produces no history writes

package.json

@@ -13,9 +13,10 @@
     "build": "npm run build:api",
     "build:api": "tsc -p tsconfig.json",
     "build:web": "next build",
+    "typecheck:scripts": "tsc --noEmit -p tsconfig.scripts.json",
     "start": "node dist/server/index.js",
-    "test": "tsx --test tests/project-device-schema.test.ts tests/project-device-schema-migration.test.ts tests/project-device-placement.service.test.ts tests/project-device-sync.service.test.ts tests/legacy-consumer-migration-planner.test.ts tests/legacy-consumer-migration.repository.test.ts tests/circuit-numbering.service.test.ts tests/circuit-power-calculation.test.ts tests/circuit-tree.controller.test.ts tests/circuit-editor-history.test.ts tests/circuit-grid-insertion.test.ts tests/circuit-grid-safety.test.ts tests/circuit-grid-model.test.ts tests/circuit-structure-command.test.ts tests/circuit-device-row-move-command.test.ts tests/circuit-section-reorder-command.test.ts tests/circuit-section-renumber-command.test.ts tests/circuit-grid-projection.test.ts tests/distribution-board.repository.test.ts tests/distribution-board-structure-project-command.repository.test.ts tests/project-device-project-command.repository.test.ts tests/project-device-structure-project-command.repository.test.ts tests/project-device-row-sync-project-command.repository.test.ts tests/circuit-section-reorder-project-command.repository.test.ts tests/circuit-section-renumber-project-command.repository.test.ts tests/project-command.model.test.ts tests/project-revision.repository.test.ts tests/circuit-project-command.repository.test.ts tests/circuit-structure-project-command.repository.test.ts tests/circuit-device-row-project-command.repository.test.ts tests/circuit-device-row-structure-project-command.repository.test.ts tests/circuit-device-row-move-project-command.repository.test.ts tests/project-history.repository.test.ts tests/project-history-timeline.test.ts tests/project-version-history.test.ts tests/project-settings-project-command.repository.test.ts tests/project-state-snapshot.test.ts tests/project-snapshot-policy.test.ts tests/project-snapshot.repository.test.ts tests/project-state-restore-command.repository.test.ts tests/project-command.service.test.ts tests/database-backup.test.ts",
+    "test": "tsx --test tests/project-device-schema.test.ts tests/project-device-schema-migration.test.ts tests/project-device-placement.service.test.ts tests/project-device-sync.service.test.ts tests/legacy-consumer-migration-planner.test.ts tests/legacy-consumer-migration.service.test.ts tests/legacy-consumer-migration.repository.test.ts tests/circuit-numbering.service.test.ts tests/circuit-power-calculation.test.ts tests/circuit-tree.controller.test.ts tests/circuit-editor-history.test.ts tests/circuit-grid-insertion.test.ts tests/circuit-grid-safety.test.ts tests/circuit-grid-model.test.ts tests/circuit-structure-command.test.ts tests/circuit-device-row-move-command.test.ts tests/circuit-section-reorder-command.test.ts tests/circuit-section-renumber-command.test.ts tests/circuit-grid-projection.test.ts tests/distribution-board-structure-project-command.repository.test.ts tests/project-location-structure-project-command.repository.test.ts tests/project-device-project-command.repository.test.ts tests/project-device-structure-project-command.repository.test.ts tests/project-device-row-sync-project-command.repository.test.ts tests/circuit-section-reorder-project-command.repository.test.ts tests/circuit-section-renumber-project-command.repository.test.ts tests/project-command.model.test.ts tests/project-revision.persistence.test.ts tests/circuit-project-command.repository.test.ts tests/circuit-structure-project-command.repository.test.ts tests/circuit-device-row-project-command.repository.test.ts tests/circuit-device-row-structure-project-command.repository.test.ts tests/circuit-device-row-move-project-command.repository.test.ts tests/project-history.repository.test.ts tests/project-history-timeline.test.ts tests/project-version-history.test.ts tests/project-settings-project-command.repository.test.ts tests/project-state-snapshot.test.ts tests/project-snapshot-policy.test.ts tests/project-snapshot.repository.test.ts tests/project-state-restore-command.repository.test.ts tests/project-command.service.test.ts tests/database-backup.test.ts",
-    "test:watch": "tsx --watch --test tests/project-device-schema.test.ts tests/project-device-schema-migration.test.ts tests/project-device-placement.service.test.ts tests/project-device-sync.service.test.ts tests/legacy-consumer-migration-planner.test.ts tests/legacy-consumer-migration.repository.test.ts tests/circuit-numbering.service.test.ts tests/circuit-power-calculation.test.ts tests/circuit-tree.controller.test.ts tests/circuit-editor-history.test.ts tests/circuit-grid-insertion.test.ts tests/circuit-grid-safety.test.ts tests/circuit-grid-model.test.ts tests/circuit-structure-command.test.ts tests/circuit-device-row-move-command.test.ts tests/circuit-section-reorder-command.test.ts tests/circuit-section-renumber-command.test.ts tests/circuit-grid-projection.test.ts tests/distribution-board.repository.test.ts tests/distribution-board-structure-project-command.repository.test.ts tests/project-device-project-command.repository.test.ts tests/project-device-structure-project-command.repository.test.ts tests/project-device-row-sync-project-command.repository.test.ts tests/circuit-section-reorder-project-command.repository.test.ts tests/circuit-section-renumber-project-command.repository.test.ts tests/project-command.model.test.ts tests/project-revision.repository.test.ts tests/circuit-project-command.repository.test.ts tests/circuit-structure-project-command.repository.test.ts tests/circuit-device-row-project-command.repository.test.ts tests/circuit-device-row-structure-project-command.repository.test.ts tests/circuit-device-row-move-project-command.repository.test.ts tests/project-history.repository.test.ts tests/project-history-timeline.test.ts tests/project-version-history.test.ts tests/project-settings-project-command.repository.test.ts tests/project-state-snapshot.test.ts tests/project-snapshot-policy.test.ts tests/project-snapshot.repository.test.ts tests/project-state-restore-command.repository.test.ts tests/project-command.service.test.ts tests/database-backup.test.ts",
+    "test:watch": "tsx --watch --test tests/project-device-schema.test.ts tests/project-device-schema-migration.test.ts tests/project-device-placement.service.test.ts tests/project-device-sync.service.test.ts tests/legacy-consumer-migration-planner.test.ts tests/legacy-consumer-migration.service.test.ts tests/legacy-consumer-migration.repository.test.ts tests/circuit-numbering.service.test.ts tests/circuit-power-calculation.test.ts tests/circuit-tree.controller.test.ts tests/circuit-editor-history.test.ts tests/circuit-grid-insertion.test.ts tests/circuit-grid-safety.test.ts tests/circuit-grid-model.test.ts tests/circuit-structure-command.test.ts tests/circuit-device-row-move-command.test.ts tests/circuit-section-reorder-command.test.ts tests/circuit-section-renumber-command.test.ts tests/circuit-grid-projection.test.ts tests/distribution-board-structure-project-command.repository.test.ts tests/project-location-structure-project-command.repository.test.ts tests/project-device-project-command.repository.test.ts tests/project-device-structure-project-command.repository.test.ts tests/project-device-row-sync-project-command.repository.test.ts tests/circuit-section-reorder-project-command.repository.test.ts tests/circuit-section-renumber-project-command.repository.test.ts tests/project-command.model.test.ts tests/project-revision.persistence.test.ts tests/circuit-project-command.repository.test.ts tests/circuit-structure-project-command.repository.test.ts tests/circuit-device-row-project-command.repository.test.ts tests/circuit-device-row-structure-project-command.repository.test.ts tests/circuit-device-row-move-project-command.repository.test.ts tests/project-history.repository.test.ts tests/project-history-timeline.test.ts tests/project-version-history.test.ts tests/project-settings-project-command.repository.test.ts tests/project-state-snapshot.test.ts tests/project-snapshot-policy.test.ts tests/project-snapshot.repository.test.ts tests/project-state-restore-command.repository.test.ts tests/project-command.service.test.ts tests/database-backup.test.ts",
     "db:generate": "drizzle-kit generate",
     "db:migrate": "drizzle-kit migrate",
     "db:backup": "tsx scripts/db-backup.ts",

scripts/db-backfill-sections.ts

@@ -1,10 +1,11 @@
+import { db } from "../src/db/client.js";
 import { CircuitListRepository } from "../src/db/repositories/circuit-list.repository.js";
 import { CircuitSectionRepository } from "../src/db/repositories/circuit-section.repository.js";
 import { ProjectRepository } from "../src/db/repositories/project.repository.js";
 
-const projectRepository = new ProjectRepository();
+const projectRepository = new ProjectRepository(db);
-const circuitListRepository = new CircuitListRepository();
+const circuitListRepository = new CircuitListRepository(db);
-const circuitSectionRepository = new CircuitSectionRepository();
+const circuitSectionRepository = new CircuitSectionRepository(db);
 
 async function run() {
   const projects = await projectRepository.list();

scripts/db-migrate-legacy-consumers.ts

@@ -1,15 +1,22 @@
 import { db } from "../src/db/client.js";
+import { CircuitRepository } from "../src/db/repositories/circuit.repository.js";
 import { CircuitListRepository } from "../src/db/repositories/circuit-list.repository.js";
+import { CircuitSectionRepository } from "../src/db/repositories/circuit-section.repository.js";
 import { LegacyConsumerMigrationRepository } from "../src/db/repositories/legacy-consumer-migration.repository.js";
 import { ProjectRepository } from "../src/db/repositories/project.repository.js";
+import { RoomRepository } from "../src/db/repositories/room.repository.js";
 import { LegacyConsumerMigrationService } from "../src/domain/services/legacy-consumer-migration.service.js";
 
-const projectRepository = new ProjectRepository();
+const projectRepository = new ProjectRepository(db);
-const circuitListRepository = new CircuitListRepository();
+const circuitListRepository = new CircuitListRepository(db);
 const migrationRepository = new LegacyConsumerMigrationRepository(db);
-const migrationService = new LegacyConsumerMigrationService(
+const migrationService = new LegacyConsumerMigrationService({
-  migrationRepository
+  circuitListReader: circuitListRepository,
-);
+  sectionStore: new CircuitSectionRepository(db),
+  circuitReader: new CircuitRepository(db),
+  roomReader: new RoomRepository(db),
+  migrationStore: migrationRepository,
+});
 
 async function run() {
   const projects = await projectRepository.list();

src/app/projects/[projectId]/page.tsx

@@ -204,14 +204,19 @@ export default function ProjectDetailPage() {
 
   async function handleCreateFloor(event: FormEvent<HTMLFormElement>) {
     event.preventDefault();
-    if (!projectId || !floorName.trim()) {
+    if (!projectId || !project || !floorName.trim()) {
       return;
     }
     setIsSaving(true);
     setError(null);
     try {
-      const created = await createFloor(projectId, { name: floorName.trim() });
+      const result = await createFloor(
-      setFloors((current) => [...current, created]);
+        projectId,
+        { name: floorName.trim() },
+        project.currentRevision
+      );
+      setFloors((current) => [...current, result.floor]);
+      applyProjectRevision(result.history.currentRevision);
       setFloorName("");
     } catch (err) {
       setError(err instanceof Error ? err.message : "Etage konnte nicht erstellt werden.");
@@ -222,18 +227,28 @@ export default function ProjectDetailPage() {
 
   async function handleCreateRoom(event: FormEvent<HTMLFormElement>) {
     event.preventDefault();
-    if (!projectId || !roomNumber.trim() || !roomName.trim()) {
+    if (
+      !projectId ||
+      !project ||
+      !roomNumber.trim() ||
+      !roomName.trim()
+    ) {
       return;
     }
     setIsSaving(true);
     setError(null);
     try {
-      const created = await createRoom(projectId, {
+      const result = await createRoom(
+        projectId,
+        {
           floorId: roomFloorId || undefined,
           roomNumber: roomNumber.trim(),
           roomName: roomName.trim(),
-      });
+        },
-      setRooms((current) => [...current, created]);
+        project.currentRevision
+      );
+      setRooms((current) => [...current, result.room]);
+      applyProjectRevision(result.history.currentRevision);
       setRoomNumber("");
       setRoomName("");
       setRoomFloorId("");

src/db/repositories/circuit-device-row-move-project-command.repository.ts

@@ -19,8 +19,7 @@ import { circuitDeviceRows } from "../schema/circuit-device-rows.js";
 import { circuitLists } from "../schema/circuit-lists.js";
 import { circuitSections } from "../schema/circuit-sections.js";
 import { circuits } from "../schema/circuits.js";
-import { applyProjectHistoryTransition } from "./project-history.persistence.js";
+import { executeProjectCommandTransaction } from "./project-command-transaction.persistence.js";
-import { appendProjectRevision } from "./project-revision.persistence.js";
 
 interface PersistedMoveRow {
   id: string;
@@ -36,29 +35,12 @@ export class CircuitDeviceRowMoveProjectCommandRepository
   execute(input: ExecuteCircuitDeviceRowMoveCommandInput) {
     this.assertSupportedCommand(input.command);
 
-    return this.database.transaction((tx) => {
+    return executeProjectCommandTransaction(
-      const inverse = this.applyCommand(
+      this.database,
-        tx,
+      input,
-        input.projectId,
+      (tx) =>
-        input.command
+        this.applyCommand(tx, input.projectId, input.command)
     );
-      const revision = appendProjectRevision(tx, {
-        projectId: input.projectId,
-        expectedRevision: input.expectedRevision,
-        source: input.source,
-        description: input.description,
-        actorId: input.actorId,
-        forward: input.command,
-        inverse,
-      });
-      applyProjectHistoryTransition(tx, {
-        projectId: input.projectId,
-        source: input.source,
-        recordedChangeSetId: revision.changeSetId,
-        targetChangeSetId: input.historyTargetChangeSetId,
-      });
-      return { revision, inverse };
-    });
   }
 
   private assertSupportedCommand(

src/db/repositories/circuit-device-row-project-command.repository.ts

@@ -21,8 +21,7 @@ import {
   toCircuitDeviceRowPatchValues,
   type CircuitDeviceRowPatchInput,
 } from "./circuit-device-row.persistence.js";
-import { applyProjectHistoryTransition } from "./project-history.persistence.js";
+import { executeProjectCommandTransactionWithAppliedForward } from "./project-command-transaction.persistence.js";
-import { appendProjectRevision } from "./project-revision.persistence.js";
 
 type CircuitDeviceRow = typeof circuitDeviceRows.$inferSelect;
 
@@ -34,7 +33,17 @@ export class CircuitDeviceRowProjectCommandRepository
   executeUpdate(input: ExecuteCircuitDeviceRowUpdateCommandInput) {
     assertCircuitDeviceRowUpdateProjectCommand(input.command);
 
-    return this.database.transaction((tx) => {
+    return executeProjectCommandTransactionWithAppliedForward(
+      this.database,
+      input,
+      (tx) => this.applyCommand(tx, input)
+    );
+  }
+
+  private applyCommand(
+    tx: AppDatabase,
+    input: ExecuteCircuitDeviceRowUpdateCommandInput
+  ) {
     const current = tx
       .select()
       .from(circuitDeviceRows)
@@ -109,24 +118,10 @@ export class CircuitDeviceRowProjectCommandRepository
       throw new Error("Circuit device row changed before command execution.");
     }
 
-      const revision = appendProjectRevision(tx, {
+    return {
-        projectId: input.projectId,
-        expectedRevision: input.expectedRevision,
-        source: input.source,
-        description: input.description,
-        actorId: input.actorId,
       forward: appliedForward,
       inverse,
-      });
+    };
-      applyProjectHistoryTransition(tx, {
-        projectId: input.projectId,
-        source: input.source,
-        recordedChangeSetId: revision.changeSetId,
-        targetChangeSetId: input.historyTargetChangeSetId,
-      });
-
-      return { revision, inverse };
-    });
   }
 
   private assertLinkedProjectDevice(

src/db/repositories/circuit-device-row-structure-project-command.repository.ts

@@ -21,8 +21,7 @@ import {
   assertCircuitDeviceRowReferencesInProject,
   toCircuitDeviceRowSnapshot,
 } from "./circuit-device-row-structure.persistence.js";
-import { applyProjectHistoryTransition } from "./project-history.persistence.js";
+import { executeProjectCommandTransaction } from "./project-command-transaction.persistence.js";
-import { appendProjectRevision } from "./project-revision.persistence.js";
 
 export class CircuitDeviceRowStructureProjectCommandRepository
   implements CircuitDeviceRowStructureProjectCommandStore
@@ -30,30 +29,17 @@ export class CircuitDeviceRowStructureProjectCommandRepository
   constructor(private readonly database: AppDatabase) {}
 
   execute(input: ExecuteCircuitDeviceRowStructureCommandInput) {
-    return this.database.transaction((tx) => {
+    return executeProjectCommandTransaction(
-      const inverse = this.applyCommand(
+      this.database,
+      input,
+      (tx) =>
+        this.applyCommand(
           tx,
           input.projectId,
           input.source,
           input.command
+        )
     );
-      const revision = appendProjectRevision(tx, {
-        projectId: input.projectId,
-        expectedRevision: input.expectedRevision,
-        source: input.source,
-        description: input.description,
-        actorId: input.actorId,
-        forward: input.command,
-        inverse,
-      });
-      applyProjectHistoryTransition(tx, {
-        projectId: input.projectId,
-        source: input.source,
-        recordedChangeSetId: revision.changeSetId,
-        targetChangeSetId: input.historyTargetChangeSetId,
-      });
-      return { revision, inverse };
-    });
   }
 
   private applyCommand(

src/db/repositories/circuit-device-row.repository.ts

@@ -1,38 +1,18 @@
-import crypto from "node:crypto";
 import { and, asc, eq, inArray } from "drizzle-orm";
-import { db } from "../client.js";
+import type { AppDatabase } from "../database-context.js";
 import { circuitDeviceRows } from "../schema/circuit-device-rows.js";
 import { circuitLists } from "../schema/circuit-lists.js";
 import { circuits } from "../schema/circuits.js";
 import { distributionBoards } from "../schema/distribution-boards.js";
-import {
-  toCircuitDeviceRowCreateValues,
-  toCircuitDeviceRowUpdateValues,
-  type CircuitDeviceRowCreateInput,
-  type CircuitDeviceRowUpdateInput,
-} from "./circuit-device-row.persistence.js";
-export type {
-  CircuitDeviceRowCreateInput,
-  CircuitDeviceRowUpdateInput,
-} from "./circuit-device-row.persistence.js";
-export { toCircuitDeviceRowCreateValues } from "./circuit-device-row.persistence.js";
 
 export class CircuitDeviceRowRepository {
-  async findById(rowId: string) {
+  constructor(private readonly database: AppDatabase) {}
-    const [row] = await db.select().from(circuitDeviceRows).where(eq(circuitDeviceRows.id, rowId)).limit(1);
-    return row ?? null;
-  }
-
-  async countByCircuit(circuitId: string) {
-    const rows = await db.select({ id: circuitDeviceRows.id }).from(circuitDeviceRows).where(eq(circuitDeviceRows.circuitId, circuitId));
-    return rows.length;
-  }
 
   async listByCircuitList(circuitIds: string[]) {
     if (!circuitIds.length) {
       return [];
     }
-    return db
+    return this.database
       .select()
       .from(circuitDeviceRows)
       .where(inArray(circuitDeviceRows.circuitId, circuitIds))
@@ -40,7 +20,7 @@ export class CircuitDeviceRowRepository {
   }
 
   async listLinkedByProjectDevice(projectId: string, projectDeviceId: string) {
-    return db
+    return this.database
       .select({
         id: circuitDeviceRows.id,
         circuitId: circuitDeviceRows.circuitId,
@@ -83,34 +63,4 @@ export class CircuitDeviceRowRepository {
       .orderBy(asc(distributionBoards.name), asc(circuits.equipmentIdentifier), asc(circuitDeviceRows.sortOrder));
   }
 
-  async create(input: CircuitDeviceRowCreateInput) {
-    const id = crypto.randomUUID();
-    await db.insert(circuitDeviceRows).values(toCircuitDeviceRowCreateValues(id, input));
-    return id;
-  }
-
-  async update(
-    rowId: string,
-    input: CircuitDeviceRowUpdateInput
-  ) {
-    await db
-      .update(circuitDeviceRows)
-      .set(toCircuitDeviceRowUpdateValues(input))
-      .where(eq(circuitDeviceRows.id, rowId));
-  }
-
-  async delete(rowId: string) {
-    await db.delete(circuitDeviceRows).where(eq(circuitDeviceRows.id, rowId));
-  }
-
-  async moveToCircuit(rowId: string, targetCircuitId: string, sortOrder: number) {
-    await db
-      .update(circuitDeviceRows)
-      .set({
-        circuitId: targetCircuitId,
-        sortOrder,
-      })
-      .where(eq(circuitDeviceRows.id, rowId));
-  }
-
 }

src/db/repositories/circuit-list.repository.ts

@@ -1,51 +1,17 @@
 import { and, eq } from "drizzle-orm";
-import { db } from "../client.js";
+import type { AppDatabase } from "../database-context.js";
 import { circuitLists } from "../schema/circuit-lists.js";
 
 export class CircuitListRepository {
+  constructor(private readonly database: AppDatabase) {}
+
   async listByProject(projectId: string) {
+    const db = this.database;
     return db.select().from(circuitLists).where(eq(circuitLists.projectId, projectId));
   }
 
-  async createForDistributionBoard(input: {
-    projectId: string;
-    distributionBoardId: string;
-    name: string;
-  }) {
-    const entry = {
-      id: input.distributionBoardId,
-      projectId: input.projectId,
-      distributionBoardId: input.distributionBoardId,
-      name: input.name,
-    };
-    await db.insert(circuitLists).values(entry);
-    return entry;
-  }
-
-  async findByDistributionBoardId(projectId: string, distributionBoardId: string) {
-    const [row] = await db
-      .select()
-      .from(circuitLists)
-      .where(
-        and(
-          eq(circuitLists.projectId, projectId),
-          eq(circuitLists.distributionBoardId, distributionBoardId)
-        )
-      )
-      .limit(1);
-    return row ?? null;
-  }
-
-  async existsInProject(projectId: string, circuitListId: string) {
-    const [row] = await db
-      .select({ id: circuitLists.id })
-      .from(circuitLists)
-      .where(and(eq(circuitLists.projectId, projectId), eq(circuitLists.id, circuitListId)))
-      .limit(1);
-    return Boolean(row);
-  }
-
   async findById(projectId: string, circuitListId: string) {
+    const db = this.database;
     const [row] = await db
       .select()
       .from(circuitLists)
@@ -53,13 +19,4 @@ export class CircuitListRepository {
       .limit(1);
     return row ?? null;
   }
-
-  async findByIdByListIdOnly(circuitListId: string) {
-    const [row] = await db
-      .select()
-      .from(circuitLists)
-      .where(eq(circuitLists.id, circuitListId))
-      .limit(1);
-    return row ?? null;
-  }
 }

src/db/repositories/circuit-project-command.repository.ts

@@ -18,8 +18,7 @@ import {
   toCircuitPatchValues,
   type CircuitPatchPersistenceInput,
 } from "./circuit.persistence.js";
-import { applyProjectHistoryTransition } from "./project-history.persistence.js";
+import { executeProjectCommandTransaction } from "./project-command-transaction.persistence.js";
-import { appendProjectRevision } from "./project-revision.persistence.js";
 
 type CircuitRow = typeof circuits.$inferSelect;
 
@@ -31,7 +30,17 @@ export class CircuitProjectCommandRepository
   executeUpdate(input: ExecuteCircuitUpdateCommandInput) {
     assertCircuitUpdateProjectCommand(input.command);
 
-    return this.database.transaction((tx) => {
+    return executeProjectCommandTransaction(
+      this.database,
+      input,
+      (tx) => this.applyCommand(tx, input)
+    );
+  }
+
+  private applyCommand(
+    tx: AppDatabase,
+    input: ExecuteCircuitUpdateCommandInput
+  ) {
     const current = tx
       .select()
       .from(circuits)
@@ -88,24 +97,7 @@ export class CircuitProjectCommandRepository
       throw new Error("Circuit changed before command execution.");
     }
 
-      const revision = appendProjectRevision(tx, {
+    return inverse;
-        projectId: input.projectId,
-        expectedRevision: input.expectedRevision,
-        source: input.source,
-        description: input.description,
-        actorId: input.actorId,
-        forward: input.command,
-        inverse,
-      });
-      applyProjectHistoryTransition(tx, {
-        projectId: input.projectId,
-        source: input.source,
-        recordedChangeSetId: revision.changeSetId,
-        targetChangeSetId: input.historyTargetChangeSetId,
-      });
-
-      return { revision, inverse };
-    });
   }
 
   private assertSectionInCircuitList(

src/db/repositories/circuit-section-renumber-project-command.repository.ts

@@ -12,8 +12,7 @@ import type { AppDatabase } from "../database-context.js";
 import { circuitLists } from "../schema/circuit-lists.js";
 import { circuitSections } from "../schema/circuit-sections.js";
 import { circuits } from "../schema/circuits.js";
-import { applyProjectHistoryTransition } from "./project-history.persistence.js";
+import { executeProjectCommandTransaction } from "./project-command-transaction.persistence.js";
-import { appendProjectRevision } from "./project-revision.persistence.js";
 
 export class CircuitSectionRenumberProjectCommandRepository
   implements CircuitSectionRenumberProjectCommandStore
@@ -23,7 +22,17 @@ export class CircuitSectionRenumberProjectCommandRepository
   execute(input: ExecuteCircuitSectionRenumberCommandInput) {
     assertCircuitSectionRenumberProjectCommand(input.command);
 
-    return this.database.transaction((tx) => {
+    return executeProjectCommandTransaction(
+      this.database,
+      input,
+      (tx) => this.applyCommand(tx, input)
+    );
+  }
+
+  private applyCommand(
+    tx: AppDatabase,
+    input: ExecuteCircuitSectionRenumberCommandInput
+  ) {
     const section = tx
       .select({
         id: circuitSections.id,
@@ -190,23 +199,7 @@ export class CircuitSectionRenumberProjectCommandRepository
       }
     }
 
-      const revision = appendProjectRevision(tx, {
+    return inverse;
-        projectId: input.projectId,
-        expectedRevision: input.expectedRevision,
-        source: input.source,
-        description: input.description,
-        actorId: input.actorId,
-        forward: input.command,
-        inverse,
-      });
-      applyProjectHistoryTransition(tx, {
-        projectId: input.projectId,
-        source: input.source,
-        recordedChangeSetId: revision.changeSetId,
-        targetChangeSetId: input.historyTargetChangeSetId,
-      });
-      return { revision, inverse };
-    });
   }
 
   private createTemporaryIdentifiers(

src/db/repositories/circuit-section-reorder-project-command.repository.ts

@@ -21,8 +21,7 @@ import type { AppDatabase } from "../database-context.js";
 import { circuitLists } from "../schema/circuit-lists.js";
 import { circuitSections } from "../schema/circuit-sections.js";
 import { circuits } from "../schema/circuits.js";
-import { applyProjectHistoryTransition } from "./project-history.persistence.js";
+import { executeProjectCommandTransaction } from "./project-command-transaction.persistence.js";
-import { appendProjectRevision } from "./project-revision.persistence.js";
 
 type ReorderHistoryCommand =
   | CircuitSectionReorderProjectCommand
@@ -36,7 +35,17 @@ export class CircuitSectionReorderProjectCommandRepository
   execute(input: ExecuteCircuitSectionReorderCommandInput) {
     this.assertSupportedCommand(input.command);
 
-    return this.database.transaction((tx) => {
+    return executeProjectCommandTransaction(
+      this.database,
+      input,
+      (tx) => this.applyCommand(tx, input)
+    );
+  }
+
+  private applyCommand(
+    tx: AppDatabase,
+    input: ExecuteCircuitSectionReorderCommandInput
+  ) {
     const commandSections = this.getCommandSections(input.command);
     const inverseSections = commandSections.map((section) => {
       this.assertCompleteCurrentSection(
@@ -67,23 +76,7 @@ export class CircuitSectionReorderProjectCommandRepository
         : createCircuitSectionsReorderProjectCommand(
             inverseSections
           );
-      const revision = appendProjectRevision(tx, {
+    return inverse;
-        projectId: input.projectId,
-        expectedRevision: input.expectedRevision,
-        source: input.source,
-        description: input.description,
-        actorId: input.actorId,
-        forward: input.command,
-        inverse,
-      });
-      applyProjectHistoryTransition(tx, {
-        projectId: input.projectId,
-        source: input.source,
-        recordedChangeSetId: revision.changeSetId,
-        targetChangeSetId: input.historyTargetChangeSetId,
-      });
-      return { revision, inverse };
-    });
   }
 
   private assertSupportedCommand(

src/db/repositories/circuit-section.repository.ts

@@ -1,7 +1,7 @@
 import crypto from "node:crypto";
 import { and, asc, eq } from "drizzle-orm";
 import { defaultCircuitSectionDefinitions } from "../../domain/models/distribution-board-structure-project-command.model.js";
-import { db } from "../client.js";
+import type { AppDatabase } from "../database-context.js";
 import { circuitSections } from "../schema/circuit-sections.js";
 
 export function createDefaultCircuitSectionValues(circuitListId: string) {
@@ -13,12 +13,16 @@ export function createDefaultCircuitSectionValues(circuitListId: string) {
 }
 
 export class CircuitSectionRepository {
+  constructor(private readonly database: AppDatabase) {}
+
   async findById(sectionId: string) {
+    const db = this.database;
     const [row] = await db.select().from(circuitSections).where(eq(circuitSections.id, sectionId)).limit(1);
     return row ?? null;
   }
 
   async listByCircuitList(circuitListId: string) {
+    const db = this.database;
     return db
       .select()
       .from(circuitSections)
@@ -27,6 +31,7 @@ export class CircuitSectionRepository {
   }
 
   async createDefaults(circuitListId: string) {
+    const db = this.database;
     for (const entry of createDefaultCircuitSectionValues(circuitListId)) {
       const existing = await db
         .select({ id: circuitSections.id })

src/db/repositories/circuit-structure-project-command.repository.ts

@@ -22,8 +22,7 @@ import {
   assertCircuitDeviceRowReferencesInProject,
   toCircuitDeviceRowSnapshot,
 } from "./circuit-device-row-structure.persistence.js";
-import { applyProjectHistoryTransition } from "./project-history.persistence.js";
+import { executeProjectCommandTransaction } from "./project-command-transaction.persistence.js";
-import { appendProjectRevision } from "./project-revision.persistence.js";
 
 export class CircuitStructureProjectCommandRepository
   implements CircuitStructureProjectCommandStore
@@ -31,30 +30,17 @@ export class CircuitStructureProjectCommandRepository
   constructor(private readonly database: AppDatabase) {}
 
   execute(input: ExecuteCircuitStructureCommandInput) {
-    return this.database.transaction((tx) => {
+    return executeProjectCommandTransaction(
-      const inverse = this.applyCommand(
+      this.database,
+      input,
+      (tx) =>
+        this.applyCommand(
           tx,
           input.projectId,
           input.source,
           input.command
+        )
     );
-      const revision = appendProjectRevision(tx, {
-        projectId: input.projectId,
-        expectedRevision: input.expectedRevision,
-        source: input.source,
-        description: input.description,
-        actorId: input.actorId,
-        forward: input.command,
-        inverse,
-      });
-      applyProjectHistoryTransition(tx, {
-        projectId: input.projectId,
-        source: input.source,
-        recordedChangeSetId: revision.changeSetId,
-        targetChangeSetId: input.historyTargetChangeSetId,
-      });
-      return { revision, inverse };
-    });
   }
 
   private applyCommand(

src/db/repositories/circuit.repository.ts

@@ -1,26 +1,12 @@
-import crypto from "node:crypto";
+import { asc, eq } from "drizzle-orm";
-import { and, asc, eq, ne } from "drizzle-orm";
+import type { AppDatabase } from "../database-context.js";
-import { db } from "../client.js";
 import { circuits } from "../schema/circuits.js";
-import {
-  toCircuitCreateValues,
-  type CircuitCreatePersistenceInput,
-} from "./circuit.persistence.js";
-
-export type {
-  CircuitCreatePersistenceInput,
-} from "./circuit.persistence.js";
-export {
-  toCircuitCreateValues,
-} from "./circuit.persistence.js";
 
 export class CircuitRepository {
-  async findById(circuitId: string) {
+  constructor(private readonly database: AppDatabase) {}
-    const [row] = await db.select().from(circuits).where(eq(circuits.id, circuitId)).limit(1);
-    return row ?? null;
-  }
 
   async listByCircuitList(circuitListId: string) {
+    const db = this.database;
     return db
       .select()
       .from(circuits)
@@ -28,85 +14,12 @@ export class CircuitRepository {
       .orderBy(asc(circuits.sortOrder), asc(circuits.equipmentIdentifier));
   }
 
-  async create(input: CircuitCreatePersistenceInput) {
-    const id = crypto.randomUUID();
-    await db.insert(circuits).values(toCircuitCreateValues(id, input));
-    return id;
-  }
-
-  async update(
-    circuitId: string,
-    input: {
-      sectionId: string;
-      equipmentIdentifier: string;
-      displayName?: string;
-      sortOrder: number;
-      protectionType?: string;
-      protectionRatedCurrent?: number;
-      protectionCharacteristic?: string;
-      cableType?: string;
-      cableCrossSection?: string;
-      cableLength?: number;
-      rcdAssignment?: string;
-      terminalDesignation?: string;
-      voltage?: number;
-      controlRequirement?: string;
-      status?: string;
-      isReserve: boolean;
-      remark?: string;
-    }
-  ) {
-    await db
-      .update(circuits)
-      .set({
-        sectionId: input.sectionId,
-        equipmentIdentifier: input.equipmentIdentifier,
-        displayName: input.displayName ?? null,
-        sortOrder: input.sortOrder,
-        protectionType: input.protectionType ?? null,
-        protectionRatedCurrent: input.protectionRatedCurrent ?? null,
-        protectionCharacteristic: input.protectionCharacteristic ?? null,
-        cableType: input.cableType ?? null,
-        cableCrossSection: input.cableCrossSection ?? null,
-        cableLength: input.cableLength ?? null,
-        rcdAssignment: input.rcdAssignment ?? null,
-        terminalDesignation: input.terminalDesignation ?? null,
-        voltage: input.voltage ?? null,
-        controlRequirement: input.controlRequirement ?? null,
-        status: input.status ?? null,
-        isReserve: input.isReserve ? 1 : 0,
-        remark: input.remark ?? null,
-      })
-      .where(eq(circuits.id, circuitId));
-  }
-
-  async delete(circuitId: string) {
-    await db.delete(circuits).where(eq(circuits.id, circuitId));
-  }
-
-  async existsByEquipmentIdentifier(circuitListId: string, equipmentIdentifier: string, excludeCircuitId?: string) {
-    const rows = await db
-      .select({ id: circuits.id })
-      .from(circuits)
-      .where(
-        excludeCircuitId
-          ? and(
-              eq(circuits.circuitListId, circuitListId),
-              eq(circuits.equipmentIdentifier, equipmentIdentifier),
-              ne(circuits.id, excludeCircuitId)
-            )
-          : and(eq(circuits.circuitListId, circuitListId), eq(circuits.equipmentIdentifier, equipmentIdentifier))
-      )
-      .limit(1);
-    return Boolean(rows.length);
-  }
-
   async listBySection(sectionId: string) {
+    const db = this.database;
     return db
       .select()
       .from(circuits)
       .where(eq(circuits.sectionId, sectionId))
       .orderBy(asc(circuits.sortOrder), asc(circuits.equipmentIdentifier));
   }
-
 }

src/db/repositories/distribution-board-structure-project-command.repository.ts

@@ -19,8 +19,7 @@ import { circuitSections } from "../schema/circuit-sections.js";
 import { circuits } from "../schema/circuits.js";
 import { distributionBoards } from "../schema/distribution-boards.js";
 import { projects } from "../schema/projects.js";
-import { applyProjectHistoryTransition } from "./project-history.persistence.js";
+import { executeProjectCommandTransaction } from "./project-command-transaction.persistence.js";
-import { appendProjectRevision } from "./project-revision.persistence.js";
 
 export class DistributionBoardStructureProjectCommandRepository
   implements DistributionBoardStructureProjectCommandStore
@@ -28,29 +27,12 @@ export class DistributionBoardStructureProjectCommandRepository
   constructor(private readonly database: AppDatabase) {}
 
   execute(input: ExecuteDistributionBoardStructureCommandInput) {
-    return this.database.transaction((tx) => {
+    return executeProjectCommandTransaction(
-      const inverse = this.applyCommand(
+      this.database,
-        tx,
+      input,
-        input.projectId,
+      (tx) =>
-        input.command
+        this.applyCommand(tx, input.projectId, input.command)
     );
-      const revision = appendProjectRevision(tx, {
-        projectId: input.projectId,
-        expectedRevision: input.expectedRevision,
-        source: input.source,
-        description: input.description,
-        actorId: input.actorId,
-        forward: input.command,
-        inverse,
-      });
-      applyProjectHistoryTransition(tx, {
-        projectId: input.projectId,
-        source: input.source,
-        recordedChangeSetId: revision.changeSetId,
-        targetChangeSetId: input.historyTargetChangeSetId,
-      });
-      return { revision, inverse };
-    });
   }
 
   private applyCommand(

src/db/repositories/distribution-board.repository.ts

@@ -1,10 +1,6 @@
-import crypto from "node:crypto";
+import { eq } from "drizzle-orm";
-import { and, eq } from "drizzle-orm";
 import type { AppDatabase } from "../database-context.js";
-import { circuitLists } from "../schema/circuit-lists.js";
-import { circuitSections } from "../schema/circuit-sections.js";
 import { distributionBoards } from "../schema/distribution-boards.js";
-import { createDefaultCircuitSectionValues } from "./circuit-section.repository.js";
 
 export class DistributionBoardRepository {
   constructor(private readonly database: AppDatabase) {}
@@ -16,44 +12,4 @@ export class DistributionBoardRepository {
       .where(eq(distributionBoards.projectId, projectId));
   }
 
-  async create(projectId: string, name: string) {
-    const id = crypto.randomUUID();
-    const board = { id, projectId, name };
-    await this.database.insert(distributionBoards).values(board);
-    return board;
-  }
-
-  createWithCircuitListAndDefaultSections(projectId: string, name: string) {
-    const id = crypto.randomUUID();
-    const board = { id, projectId, name };
-    const circuitList = {
-      id,
-      projectId,
-      distributionBoardId: id,
-      name: `${name} Stromkreisliste`,
-    };
-    const sections = createDefaultCircuitSectionValues(id);
-
-    this.database.transaction((tx) => {
-      tx.insert(distributionBoards).values(board).run();
-      tx.insert(circuitLists).values(circuitList).run();
-      tx.insert(circuitSections).values(sections).run();
-    });
-
-    return board;
-  }
-
-  async existsInProject(projectId: string, distributionBoardId: string) {
-    const [row] = await this.database
-      .select({ id: distributionBoards.id })
-      .from(distributionBoards)
-      .where(
-        and(
-          eq(distributionBoards.projectId, projectId),
-          eq(distributionBoards.id, distributionBoardId)
-        )
-      )
-      .limit(1);
-    return Boolean(row);
-  }
 }

src/db/repositories/floor.repository.ts

@@ -1,36 +1,16 @@
-import crypto from "node:crypto";
+import { asc, eq } from "drizzle-orm";
-import { and, asc, eq } from "drizzle-orm";
+import type { AppDatabase } from "../database-context.js";
-import { db } from "../client.js";
 import { floors } from "../schema/floors.js";
 
 export class FloorRepository {
+  constructor(private readonly database: AppDatabase) {}
+
   async listByProject(projectId: string) {
+    const db = this.database;
     return db
       .select()
       .from(floors)
       .where(eq(floors.projectId, projectId))
       .orderBy(asc(floors.sortOrder), asc(floors.name));
   }
-
-  async create(projectId: string, name: string) {
-    const id = crypto.randomUUID();
-    const existing = await this.listByProject(projectId);
-    const floor = {
-      id,
-      projectId,
-      name,
-      sortOrder: existing.length,
-    };
-    await db.insert(floors).values(floor);
-    return floor;
-  }
-
-  async existsInProject(projectId: string, floorId: string) {
-    const [row] = await db
-      .select({ id: floors.id })
-      .from(floors)
-      .where(and(eq(floors.projectId, projectId), eq(floors.id, floorId)))
-      .limit(1);
-    return Boolean(row);
-  }
 }

src/db/repositories/global-device.repository.ts

@@ -1,6 +1,6 @@
 import crypto from "node:crypto";
 import { eq } from "drizzle-orm";
-import { db } from "../client.js";
+import type { AppDatabase } from "../database-context.js";
 import { globalDevices } from "../schema/global-devices.js";
 import type {
   CreateGlobalDeviceInput,
@@ -8,11 +8,15 @@ import type {
 } from "../../shared/validation/global-device.schemas.js";
 
 export class GlobalDeviceRepository {
+  constructor(private readonly database: AppDatabase) {}
+
   async list() {
+    const db = this.database;
     return db.select().from(globalDevices);
   }
 
   async create(input: CreateGlobalDeviceInput) {
+    const db = this.database;
     const id = crypto.randomUUID();
     await db.insert(globalDevices).values({
       id,
@@ -31,6 +35,7 @@ export class GlobalDeviceRepository {
   }
 
   async update(globalDeviceId: string, input: UpdateGlobalDeviceInput) {
+    const db = this.database;
     await db
       .update(globalDevices)
       .set({
@@ -49,11 +54,13 @@ export class GlobalDeviceRepository {
   }
 
   async findById(globalDeviceId: string) {
+    const db = this.database;
     const [row] = await db.select().from(globalDevices).where(eq(globalDevices.id, globalDeviceId)).limit(1);
     return row ?? null;
   }
 
   async delete(globalDeviceId: string) {
+    const db = this.database;
     await db.delete(globalDevices).where(eq(globalDevices.id, globalDeviceId));
   }
 }

src/db/repositories/legacy-consumer-migration.repository.ts

@@ -1,38 +1,17 @@
 import crypto from "node:crypto";
 import { eq, inArray, isNull } from "drizzle-orm";
+import type {
+  LegacyMigrationCircuitInput,
+  LegacyMigrationReportInput,
+} from "../../domain/ports/legacy-consumer-migration.store.js";
 import type { AppDatabase } from "../database-context.js";
 import { circuitDeviceRows } from "../schema/circuit-device-rows.js";
 import { circuits } from "../schema/circuits.js";
 import { consumers } from "../schema/consumers.js";
 import { legacyConsumerCircuitMigrations } from "../schema/legacy-consumer-circuit-migrations.js";
 import { legacyConsumerMigrationReports } from "../schema/legacy-consumer-migration-report.js";
-import {
+import { toCircuitDeviceRowCreateValues } from "./circuit-device-row.persistence.js";
-  toCircuitDeviceRowCreateValues,
+import { toCircuitCreateValues } from "./circuit.persistence.js";
-  type CircuitDeviceRowCreateInput,
-} from "./circuit-device-row.persistence.js";
-import {
-  toCircuitCreateValues,
-  type CircuitCreatePersistenceInput,
-} from "./circuit.persistence.js";
-
-export interface LegacyMigrationCircuitPersistenceInput {
-  circuit: CircuitCreatePersistenceInput;
-  deviceRows: Array<
-    Omit<CircuitDeviceRowCreateInput, "circuitId"> & { legacyConsumerId: string }
-  >;
-}
-
-export interface LegacyMigrationReportPersistenceInput {
-  legacyConsumerCount: number;
-  createdCircuitCount: number;
-  createdDeviceRowCount: number;
-  duplicateGroupedCount: number;
-  generatedIdentifierCount: number;
-  unassignedRowCount: number;
-  warningsJson: string;
-  generatedIdentifiersJson: string;
-  duplicateGroupsJson: string;
-}
 
 export class LegacyConsumerMigrationRepository {
   constructor(private readonly database: AppDatabase) {}
@@ -69,8 +48,8 @@ export class LegacyConsumerMigrationRepository {
 
   persistCircuitListMigration(input: {
     circuitListId: string;
-    circuits: LegacyMigrationCircuitPersistenceInput[];
+    circuits: LegacyMigrationCircuitInput[];
-    report: LegacyMigrationReportPersistenceInput;
+    report: LegacyMigrationReportInput;
   }) {
     if (input.circuits.some((entry) => entry.circuit.circuitListId !== input.circuitListId)) {
       throw new Error("All migrated circuits must belong to the target circuit list.");

src/db/repositories/project-command-transaction.persistence.ts

@@ -0,0 +1,96 @@
+import type { SerializedProjectCommand } from "../../domain/models/project-command.model.js";
+import type {
+  AppendedProjectRevision,
+  ProjectRevisionSource,
+} from "../../domain/ports/project-revision.store.js";
+import type { AppDatabase } from "../database-context.js";
+import { applyProjectHistoryTransition } from "./project-history.persistence.js";
+import { appendProjectRevision } from "./project-revision.persistence.js";
+
+export interface ProjectCommandTransactionInput<
+  Command extends SerializedProjectCommand<unknown>,
+> {
+  projectId: string;
+  expectedRevision: number;
+  source: ProjectRevisionSource;
+  description?: string;
+  actorId?: string;
+  historyTargetChangeSetId?: string;
+  command: Command;
+}
+
+export interface AppliedProjectCommand<
+  Forward extends SerializedProjectCommand<unknown>,
+  Inverse extends SerializedProjectCommand<unknown>,
+> {
+  forward: Forward;
+  inverse: Inverse;
+}
+
+export function executeProjectCommandTransaction<
+  Command extends SerializedProjectCommand<unknown>,
+  Inverse extends SerializedProjectCommand<unknown>,
+>(
+  database: AppDatabase,
+  input: ProjectCommandTransactionInput<Command>,
+  applyCommand: (transaction: AppDatabase) => Inverse
+): { revision: AppendedProjectRevision; inverse: Inverse } {
+  return executeAppliedProjectCommandTransaction(
+    database,
+    input,
+    (transaction) => ({
+      forward: input.command,
+      inverse: applyCommand(transaction),
+    })
+  );
+}
+
+export function executeProjectCommandTransactionWithAppliedForward<
+  Command extends SerializedProjectCommand<unknown>,
+  Forward extends SerializedProjectCommand<unknown>,
+  Inverse extends SerializedProjectCommand<unknown>,
+>(
+  database: AppDatabase,
+  input: ProjectCommandTransactionInput<Command>,
+  applyCommand: (
+    transaction: AppDatabase
+  ) => AppliedProjectCommand<Forward, Inverse>
+): { revision: AppendedProjectRevision; inverse: Inverse } {
+  return executeAppliedProjectCommandTransaction(
+    database,
+    input,
+    applyCommand
+  );
+}
+
+function executeAppliedProjectCommandTransaction<
+  Command extends SerializedProjectCommand<unknown>,
+  Forward extends SerializedProjectCommand<unknown>,
+  Inverse extends SerializedProjectCommand<unknown>,
+>(
+  database: AppDatabase,
+  input: ProjectCommandTransactionInput<Command>,
+  applyCommand: (
+    transaction: AppDatabase
+  ) => AppliedProjectCommand<Forward, Inverse>
+): { revision: AppendedProjectRevision; inverse: Inverse } {
+  return database.transaction((tx) => {
+    const { forward, inverse } = applyCommand(tx);
+    const revision = appendProjectRevision(tx, {
+      projectId: input.projectId,
+      expectedRevision: input.expectedRevision,
+      source: input.source,
+      description: input.description,
+      actorId: input.actorId,
+      forward,
+      inverse,
+    });
+    applyProjectHistoryTransition(tx, {
+      projectId: input.projectId,
+      source: input.source,
+      recordedChangeSetId: revision.changeSetId,
+      targetChangeSetId: input.historyTargetChangeSetId,
+    });
+    return { revision, inverse };
+  });
+}

src/db/repositories/project-device-project-command.repository.ts

@@ -12,8 +12,7 @@ import type {
 } from "../../domain/ports/project-device-project-command.store.js";
 import type { AppDatabase } from "../database-context.js";
 import { projectDevices } from "../schema/project-devices.js";
-import { applyProjectHistoryTransition } from "./project-history.persistence.js";
+import { executeProjectCommandTransaction } from "./project-command-transaction.persistence.js";
-import { appendProjectRevision } from "./project-revision.persistence.js";
 
 type ProjectDeviceRow = typeof projectDevices.$inferSelect;
 
@@ -25,7 +24,17 @@ export class ProjectDeviceProjectCommandRepository
   executeUpdate(input: ExecuteProjectDeviceUpdateCommandInput) {
     assertProjectDeviceUpdateProjectCommand(input.command);
 
-    return this.database.transaction((tx) => {
+    return executeProjectCommandTransaction(
+      this.database,
+      input,
+      (tx) => this.applyCommand(tx, input)
+    );
+  }
+
+  private applyCommand(
+    tx: AppDatabase,
+    input: ExecuteProjectDeviceUpdateCommandInput
+  ) {
     const current = tx
       .select()
       .from(projectDevices)
@@ -78,23 +87,7 @@ export class ProjectDeviceProjectCommandRepository
       );
     }
 
-      const revision = appendProjectRevision(tx, {
+    return inverse;
-        projectId: input.projectId,
-        expectedRevision: input.expectedRevision,
-        source: input.source,
-        description: input.description,
-        actorId: input.actorId,
-        forward: input.command,
-        inverse,
-      });
-      applyProjectHistoryTransition(tx, {
-        projectId: input.projectId,
-        source: input.source,
-        recordedChangeSetId: revision.changeSetId,
-        targetChangeSetId: input.historyTargetChangeSetId,
-      });
-      return { revision, inverse };
-    });
   }
 }
 

src/db/repositories/project-device-row-sync-project-command.repository.ts

@@ -15,8 +15,7 @@ import { circuitDeviceRows } from "../schema/circuit-device-rows.js";
 import { circuitLists } from "../schema/circuit-lists.js";
 import { circuits } from "../schema/circuits.js";
 import { projectDevices } from "../schema/project-devices.js";
-import { applyProjectHistoryTransition } from "./project-history.persistence.js";
+import { executeProjectCommandTransaction } from "./project-command-transaction.persistence.js";
-import { appendProjectRevision } from "./project-revision.persistence.js";
 
 type CircuitDeviceRow = typeof circuitDeviceRows.$inferSelect;
 
@@ -28,7 +27,17 @@ export class ProjectDeviceRowSyncProjectCommandRepository
   execute(input: ExecuteProjectDeviceRowSyncCommandInput) {
     assertProjectDeviceRowSyncProjectCommand(input.command);
 
-    return this.database.transaction((tx) => {
+    return executeProjectCommandTransaction(
+      this.database,
+      input,
+      (tx) => this.applyCommand(tx, input)
+    );
+  }
+
+  private applyCommand(
+    tx: AppDatabase,
+    input: ExecuteProjectDeviceRowSyncCommandInput
+  ) {
     const projectDevice = tx
       .select({ id: projectDevices.id })
       .from(projectDevices)
@@ -121,23 +130,7 @@ export class ProjectDeviceRowSyncProjectCommandRepository
       }
     }
 
-      const revision = appendProjectRevision(tx, {
+    return inverse;
-        projectId: input.projectId,
-        expectedRevision: input.expectedRevision,
-        source: input.source,
-        description: input.description,
-        actorId: input.actorId,
-        forward: input.command,
-        inverse,
-      });
-      applyProjectHistoryTransition(tx, {
-        projectId: input.projectId,
-        source: input.source,
-        recordedChangeSetId: revision.changeSetId,
-        targetChangeSetId: input.historyTargetChangeSetId,
-      });
-      return { revision, inverse };
-    });
   }
 }
 

src/db/repositories/project-device-structure-project-command.repository.ts

@@ -27,8 +27,7 @@ import { circuits } from "../schema/circuits.js";
 import { projectDevices } from "../schema/project-devices.js";
 import { projects } from "../schema/projects.js";
 import { toCircuitDeviceRowSnapshot } from "./circuit-device-row-structure.persistence.js";
-import { applyProjectHistoryTransition } from "./project-history.persistence.js";
+import { executeProjectCommandTransaction } from "./project-command-transaction.persistence.js";
-import { appendProjectRevision } from "./project-revision.persistence.js";
 
 const circuitDeviceRowSnapshotFields = [
   "id",
@@ -60,30 +59,17 @@ export class ProjectDeviceStructureProjectCommandRepository
   constructor(private readonly database: AppDatabase) {}
 
   execute(input: ExecuteProjectDeviceStructureCommandInput) {
-    return this.database.transaction((tx) => {
+    return executeProjectCommandTransaction(
-      const inverse = this.applyCommand(
+      this.database,
+      input,
+      (tx) =>
+        this.applyCommand(
           tx,
           input.projectId,
           input.source,
           input.command
+        )
     );
-      const revision = appendProjectRevision(tx, {
-        projectId: input.projectId,
-        expectedRevision: input.expectedRevision,
-        source: input.source,
-        description: input.description,
-        actorId: input.actorId,
-        forward: input.command,
-        inverse,
-      });
-      applyProjectHistoryTransition(tx, {
-        projectId: input.projectId,
-        source: input.source,
-        recordedChangeSetId: revision.changeSetId,
-        targetChangeSetId: input.historyTargetChangeSetId,
-      });
-      return { revision, inverse };
-    });
   }
 
   private applyCommand(

src/db/repositories/project-device.repository.ts

@@ -1,5 +1,5 @@
 import { and, eq } from "drizzle-orm";
-import { db } from "../client.js";
+import type { AppDatabase } from "../database-context.js";
 import { projectDevices } from "../schema/project-devices.js";
 import { calculateRowTotalPower } from "../../domain/calculations/circuit-power-calculation.js";
 
@@ -11,12 +11,16 @@ function withTotalPower(row: typeof projectDevices.$inferSelect) {
 }
 
 export class ProjectDeviceRepository {
+  constructor(private readonly database: AppDatabase) {}
+
   async listByProject(projectId: string) {
+    const db = this.database;
     const rows = await db.select().from(projectDevices).where(eq(projectDevices.projectId, projectId));
     return rows.map(withTotalPower);
   }
 
   async findById(projectId: string, projectDeviceId: string) {
+    const db = this.database;
     const [row] = await db
       .select()
       .from(projectDevices)

src/db/repositories/project-location-structure-project-command.repository.ts

@@ -0,0 +1,258 @@
+import { and, eq } from "drizzle-orm";
+import {
+  assertProjectFloorDeleteProjectCommand,
+  assertProjectFloorInsertProjectCommand,
+  assertProjectRoomDeleteProjectCommand,
+  assertProjectRoomInsertProjectCommand,
+  createProjectFloorDeleteProjectCommand,
+  createProjectFloorInsertProjectCommand,
+  createProjectRoomDeleteProjectCommand,
+  createProjectRoomInsertProjectCommand,
+  projectFloorDeleteCommandType,
+  projectFloorInsertCommandType,
+  projectRoomDeleteCommandType,
+  projectRoomInsertCommandType,
+  type ProjectFloorSnapshot,
+  type ProjectLocationStructureProjectCommand,
+  type ProjectRoomSnapshot,
+} from "../../domain/models/project-location-structure-project-command.model.js";
+import type {
+  ExecuteProjectLocationStructureCommandInput,
+  ProjectLocationStructureProjectCommandStore,
+} from "../../domain/ports/project-location-structure-project-command.store.js";
+import type { AppDatabase } from "../database-context.js";
+import { circuitDeviceRows } from "../schema/circuit-device-rows.js";
+import { consumers } from "../schema/consumers.js";
+import { floors } from "../schema/floors.js";
+import { projects } from "../schema/projects.js";
+import { rooms } from "../schema/rooms.js";
+import { executeProjectCommandTransaction } from "./project-command-transaction.persistence.js";
+
+export class ProjectLocationStructureProjectCommandRepository
+  implements ProjectLocationStructureProjectCommandStore
+{
+  constructor(private readonly database: AppDatabase) {}
+
+  execute(input: ExecuteProjectLocationStructureCommandInput) {
+    return executeProjectCommandTransaction(
+      this.database,
+      input,
+      (tx) =>
+        this.applyCommand(tx, input.projectId, input.command)
+    );
+  }
+
+  private applyCommand(
+    database: AppDatabase,
+    projectId: string,
+    command: ProjectLocationStructureProjectCommand
+  ): ProjectLocationStructureProjectCommand {
+    switch (command.type) {
+      case projectFloorInsertCommandType:
+        assertProjectFloorInsertProjectCommand(command);
+        return this.insertFloor(
+          database,
+          projectId,
+          command.payload.floor
+        );
+      case projectFloorDeleteCommandType:
+        assertProjectFloorDeleteProjectCommand(command);
+        return this.deleteFloor(
+          database,
+          projectId,
+          command.payload.floor
+        );
+      case projectRoomInsertCommandType:
+        assertProjectRoomInsertProjectCommand(command);
+        return this.insertRoom(
+          database,
+          projectId,
+          command.payload.room
+        );
+      case projectRoomDeleteCommandType:
+        assertProjectRoomDeleteProjectCommand(command);
+        return this.deleteRoom(
+          database,
+          projectId,
+          command.payload.room
+        );
+    }
+  }
+
+  private insertFloor(
+    database: AppDatabase,
+    projectId: string,
+    floor: ProjectFloorSnapshot
+  ) {
+    this.assertProjectExists(database, projectId);
+    if (floor.projectId !== projectId) {
+      throw new Error("Project-floor snapshot does not belong to project.");
+    }
+    const existing = database
+      .select({ id: floors.id })
+      .from(floors)
+      .where(eq(floors.id, floor.id))
+      .get();
+    if (existing) {
+      throw new Error("Project-floor id already exists.");
+    }
+    database.insert(floors).values(floor).run();
+    return createProjectFloorDeleteProjectCommand(floor);
+  }
+
+  private deleteFloor(
+    database: AppDatabase,
+    projectId: string,
+    expected: ProjectFloorSnapshot
+  ) {
+    const persisted = database
+      .select()
+      .from(floors)
+      .where(
+        and(
+          eq(floors.id, expected.id),
+          eq(floors.projectId, projectId)
+        )
+      )
+      .get();
+    if (!persisted || !sameRecord(expected, persisted)) {
+      throw new Error("Project floor changed before deletion.");
+    }
+    const referencedRoom = database
+      .select({ id: rooms.id })
+      .from(rooms)
+      .where(eq(rooms.floorId, expected.id))
+      .limit(1)
+      .get();
+    if (referencedRoom) {
+      throw new Error(
+        "A project floor with assigned rooms cannot be removed by history."
+      );
+    }
+    const deleted = database
+      .delete(floors)
+      .where(
+        and(
+          eq(floors.id, expected.id),
+          eq(floors.projectId, projectId)
+        )
+      )
+      .run();
+    if (deleted.changes !== 1) {
+      throw new Error("Project floor could not be deleted.");
+    }
+    return createProjectFloorInsertProjectCommand(expected);
+  }
+
+  private insertRoom(
+    database: AppDatabase,
+    projectId: string,
+    room: ProjectRoomSnapshot
+  ) {
+    this.assertProjectExists(database, projectId);
+    if (room.projectId !== projectId) {
+      throw new Error("Project-room snapshot does not belong to project.");
+    }
+    if (room.floorId) {
+      const floor = database
+        .select({ id: floors.id })
+        .from(floors)
+        .where(
+          and(
+            eq(floors.id, room.floorId),
+            eq(floors.projectId, projectId)
+          )
+        )
+        .get();
+      if (!floor) {
+        throw new Error("Project room references a foreign floor.");
+      }
+    }
+    const existing = database
+      .select({ id: rooms.id })
+      .from(rooms)
+      .where(eq(rooms.id, room.id))
+      .get();
+    if (existing) {
+      throw new Error("Project-room id already exists.");
+    }
+    database.insert(rooms).values(room).run();
+    return createProjectRoomDeleteProjectCommand(room);
+  }
+
+  private deleteRoom(
+    database: AppDatabase,
+    projectId: string,
+    expected: ProjectRoomSnapshot
+  ) {
+    const persisted = database
+      .select()
+      .from(rooms)
+      .where(
+        and(
+          eq(rooms.id, expected.id),
+          eq(rooms.projectId, projectId)
+        )
+      )
+      .get();
+    if (!persisted || !sameRecord(expected, persisted)) {
+      throw new Error("Project room changed before deletion.");
+    }
+    const referencedDeviceRow = database
+      .select({ id: circuitDeviceRows.id })
+      .from(circuitDeviceRows)
+      .where(eq(circuitDeviceRows.roomId, expected.id))
+      .limit(1)
+      .get();
+    const referencedLegacyConsumer = database
+      .select({ id: consumers.id })
+      .from(consumers)
+      .where(eq(consumers.roomId, expected.id))
+      .limit(1)
+      .get();
+    if (referencedDeviceRow || referencedLegacyConsumer) {
+      throw new Error(
+        "A referenced project room cannot be removed by history."
+      );
+    }
+    const deleted = database
+      .delete(rooms)
+      .where(
+        and(
+          eq(rooms.id, expected.id),
+          eq(rooms.projectId, projectId)
+        )
+      )
+      .run();
+    if (deleted.changes !== 1) {
+      throw new Error("Project room could not be deleted.");
+    }
+    return createProjectRoomInsertProjectCommand(expected);
+  }
+
+  private assertProjectExists(
+    database: AppDatabase,
+    projectId: string
+  ) {
+    const project = database
+      .select({ id: projects.id })
+      .from(projects)
+      .where(eq(projects.id, projectId))
+      .get();
+    if (!project) {
+      throw new Error("Project does not exist.");
+    }
+  }
+}
+
+function sameRecord(
+  expected: object,
+  actual: object
+) {
+  const expectedEntries = Object.entries(expected);
+  const actualRecord = actual as Record<string, unknown>;
+  return (
+    expectedEntries.length === Object.keys(actual).length &&
+    expectedEntries.every(([key, value]) => actualRecord[key] === value)
+  );
+}

src/db/repositories/project-revision.repository.ts

@@ -1,31 +0,0 @@
-import { eq } from "drizzle-orm";
-import { ProjectRevisionConflictError } from "../../domain/errors/project-revision-conflict.error.js";
-import type {
-  AppendProjectRevisionInput,
-  AppendedProjectRevision,
-  ProjectRevisionStore,
-} from "../../domain/ports/project-revision.store.js";
-import type { AppDatabase } from "../database-context.js";
-import { projects } from "../schema/projects.js";
-import { appendProjectRevision } from "./project-revision.persistence.js";
-
-export { ProjectRevisionConflictError };
-
-export class ProjectRevisionRepository implements ProjectRevisionStore {
-  constructor(private readonly database: AppDatabase) {}
-
-  getCurrentRevision(projectId: string) {
-    const project = this.database
-      .select({ currentRevision: projects.currentRevision })
-      .from(projects)
-      .where(eq(projects.id, projectId))
-      .get();
-    return project?.currentRevision ?? null;
-  }
-
-  append(input: AppendProjectRevisionInput): AppendedProjectRevision {
-    return this.database.transaction((tx) =>
-      appendProjectRevision(tx, input)
-    );
-  }
-}

src/db/repositories/project-settings-project-command.repository.ts

@@ -9,8 +9,7 @@ import type {
 } from "../../domain/ports/project-settings-project-command.store.js";
 import type { AppDatabase } from "../database-context.js";
 import { projects } from "../schema/projects.js";
-import { applyProjectHistoryTransition } from "./project-history.persistence.js";
+import { executeProjectCommandTransaction } from "./project-command-transaction.persistence.js";
-import { appendProjectRevision } from "./project-revision.persistence.js";
 
 export class ProjectSettingsProjectCommandRepository
   implements ProjectSettingsProjectCommandStore
@@ -19,7 +18,17 @@ export class ProjectSettingsProjectCommandRepository
 
   executeUpdate(input: ExecuteProjectSettingsUpdateCommandInput) {
     assertProjectSettingsUpdateProjectCommand(input.command);
-    return this.database.transaction((tx) => {
+    return executeProjectCommandTransaction(
+      this.database,
+      input,
+      (tx) => this.applyCommand(tx, input)
+    );
+  }
+
+  private applyCommand(
+    tx: AppDatabase,
+    input: ExecuteProjectSettingsUpdateCommandInput
+  ) {
     const current = tx
       .select()
       .from(projects)
@@ -50,22 +59,6 @@ export class ProjectSettingsProjectCommandRepository
       throw new Error("Project changed before settings update.");
     }
 
-      const revision = appendProjectRevision(tx, {
+    return inverse;
-        projectId: input.projectId,
-        expectedRevision: input.expectedRevision,
-        source: input.source,
-        description: input.description,
-        actorId: input.actorId,
-        forward: input.command,
-        inverse,
-      });
-      applyProjectHistoryTransition(tx, {
-        projectId: input.projectId,
-        source: input.source,
-        recordedChangeSetId: revision.changeSetId,
-        targetChangeSetId: input.historyTargetChangeSetId,
-      });
-      return { revision, inverse };
-    });
   }
 }

src/db/repositories/project-state-restore-command.repository.ts

@@ -25,8 +25,7 @@ import { legacyConsumerMigrationReports } from "../schema/legacy-consumer-migrat
 import { projectDevices } from "../schema/project-devices.js";
 import { projects } from "../schema/projects.js";
 import { rooms } from "../schema/rooms.js";
-import { applyProjectHistoryTransition } from "./project-history.persistence.js";
+import { executeProjectCommandTransaction } from "./project-command-transaction.persistence.js";
-import { appendProjectRevision } from "./project-revision.persistence.js";
 import {
   hashProjectStatePayload,
   readProjectStateSnapshot,
@@ -43,7 +42,17 @@ export class ProjectStateRestoreCommandRepository
       throw new Error("Restore state belongs to a different project.");
     }
 
-    return this.database.transaction((tx) => {
+    return executeProjectCommandTransaction(
+      this.database,
+      input,
+      (tx) => this.applyCommand(tx, input)
+    );
+  }
+
+  private applyCommand(
+    tx: AppDatabase,
+    input: ExecuteProjectStateRestoreCommandInput
+  ) {
     const current = readProjectStateSnapshot(tx, input.projectId);
     if (!current) {
       throw new Error("Project not found.");
@@ -69,23 +78,7 @@ export class ProjectStateRestoreCommandRepository
 
     replaceProjectState(tx, input.command.payload.targetState);
 
-      const revision = appendProjectRevision(tx, {
+    return inverse;
-        projectId: input.projectId,
-        expectedRevision: input.expectedRevision,
-        source: input.source,
-        description: input.description,
-        actorId: input.actorId,
-        forward: input.command,
-        inverse,
-      });
-      applyProjectHistoryTransition(tx, {
-        projectId: input.projectId,
-        source: input.source,
-        recordedChangeSetId: revision.changeSetId,
-        targetChangeSetId: input.historyTargetChangeSetId,
-      });
-      return { revision, inverse };
-    });
   }
 }
 

src/db/repositories/project.repository.ts

@@ -1,17 +1,21 @@
 import crypto from "node:crypto";
 import { eq } from "drizzle-orm";
-import { db } from "../client.js";
+import type { AppDatabase } from "../database-context.js";
 import { projects } from "../schema/projects.js";
 import type {
   CreateProjectInput,
 } from "../../shared/validation/project-structure.schemas.js";
 
 export class ProjectRepository {
+  constructor(private readonly database: AppDatabase) {}
+
   async list() {
+    const db = this.database;
     return db.select().from(projects);
   }
 
   async create(input: CreateProjectInput) {
+    const db = this.database;
     const id = crypto.randomUUID();
     const project = {
       id,
@@ -25,11 +29,8 @@ export class ProjectRepository {
   }
 
   async findById(projectId: string) {
+    const db = this.database;
     const [row] = await db.select().from(projects).where(eq(projects.id, projectId)).limit(1);
     return row ?? null;
   }
-
-  async delete(projectId: string) {
-    await db.delete(projects).where(eq(projects.id, projectId));
-  }
 }

src/db/repositories/room.repository.ts

@@ -1,42 +1,16 @@
-import crypto from "node:crypto";
+import { asc, eq } from "drizzle-orm";
-import { and, asc, eq } from "drizzle-orm";
+import type { AppDatabase } from "../database-context.js";
-import { db } from "../client.js";
 import { rooms } from "../schema/rooms.js";
-import type { CreateRoomInput } from "../../shared/validation/project-structure.schemas.js";
 
 export class RoomRepository {
+  constructor(private readonly database: AppDatabase) {}
+
   async listByProject(projectId: string) {
+    const db = this.database;
     return db
       .select()
       .from(rooms)
       .where(eq(rooms.projectId, projectId))
       .orderBy(asc(rooms.roomNumber), asc(rooms.roomName));
   }
-
-  async create(projectId: string, input: CreateRoomInput) {
-    const id = crypto.randomUUID();
-    const room = {
-      id,
-      projectId,
-      floorId: input.floorId ?? null,
-      roomNumber: input.roomNumber,
-      roomName: input.roomName,
-    };
-    await db.insert(rooms).values(room);
-    return room;
-  }
-
-  async existsInProject(projectId: string, roomId: string) {
-    const [row] = await db
-      .select({ id: rooms.id })
-      .from(rooms)
-      .where(and(eq(rooms.projectId, projectId), eq(rooms.id, roomId)))
-      .limit(1);
-    return Boolean(row);
-  }
-
-  async findById(roomId: string) {
-    const [row] = await db.select().from(rooms).where(eq(rooms.id, roomId)).limit(1);
-    return row ?? null;
-  }
 }

src/domain/models/project-location-structure-project-command.model.ts

@@ -0,0 +1,259 @@
+import crypto from "node:crypto";
+import type { SerializedProjectCommand } from "./project-command.model.js";
+
+export const projectFloorInsertCommandType = "project-floor.insert" as const;
+export const projectFloorDeleteCommandType = "project-floor.delete" as const;
+export const projectRoomInsertCommandType = "project-room.insert" as const;
+export const projectRoomDeleteCommandType = "project-room.delete" as const;
+export const projectLocationStructureCommandSchemaVersion = 1 as const;
+
+export interface ProjectFloorSnapshot {
+  id: string;
+  projectId: string;
+  name: string;
+  sortOrder: number;
+}
+
+export interface ProjectRoomSnapshot {
+  id: string;
+  projectId: string;
+  floorId: string | null;
+  roomNumber: string;
+  roomName: string;
+}
+
+interface ProjectFloorStructureCommandPayload {
+  floor: ProjectFloorSnapshot;
+}
+
+interface ProjectRoomStructureCommandPayload {
+  room: ProjectRoomSnapshot;
+}
+
+export interface ProjectFloorInsertProjectCommand
+  extends SerializedProjectCommand<ProjectFloorStructureCommandPayload> {
+  schemaVersion: typeof projectLocationStructureCommandSchemaVersion;
+  type: typeof projectFloorInsertCommandType;
+}
+
+export interface ProjectFloorDeleteProjectCommand
+  extends SerializedProjectCommand<ProjectFloorStructureCommandPayload> {
+  schemaVersion: typeof projectLocationStructureCommandSchemaVersion;
+  type: typeof projectFloorDeleteCommandType;
+}
+
+export interface ProjectRoomInsertProjectCommand
+  extends SerializedProjectCommand<ProjectRoomStructureCommandPayload> {
+  schemaVersion: typeof projectLocationStructureCommandSchemaVersion;
+  type: typeof projectRoomInsertCommandType;
+}
+
+export interface ProjectRoomDeleteProjectCommand
+  extends SerializedProjectCommand<ProjectRoomStructureCommandPayload> {
+  schemaVersion: typeof projectLocationStructureCommandSchemaVersion;
+  type: typeof projectRoomDeleteCommandType;
+}
+
+export type ProjectLocationStructureProjectCommand =
+  | ProjectFloorInsertProjectCommand
+  | ProjectFloorDeleteProjectCommand
+  | ProjectRoomInsertProjectCommand
+  | ProjectRoomDeleteProjectCommand;
+
+export function createProjectFloorSnapshot(
+  projectId: string,
+  name: string,
+  sortOrder: number
+): ProjectFloorSnapshot {
+  const floor: ProjectFloorSnapshot = {
+    id: crypto.randomUUID(),
+    projectId,
+    name: name.trim(),
+    sortOrder,
+  };
+  assertProjectFloorSnapshot(floor);
+  return floor;
+}
+
+export function createProjectRoomSnapshot(
+  projectId: string,
+  input: {
+    floorId?: string;
+    roomNumber: string;
+    roomName: string;
+  }
+): ProjectRoomSnapshot {
+  const room: ProjectRoomSnapshot = {
+    id: crypto.randomUUID(),
+    projectId,
+    floorId: input.floorId?.trim() || null,
+    roomNumber: input.roomNumber.trim(),
+    roomName: input.roomName.trim(),
+  };
+  assertProjectRoomSnapshot(room);
+  return room;
+}
+
+export function createProjectFloorInsertProjectCommand(
+  floor: ProjectFloorSnapshot
+): ProjectFloorInsertProjectCommand {
+  assertProjectFloorSnapshot(floor);
+  return {
+    schemaVersion: projectLocationStructureCommandSchemaVersion,
+    type: projectFloorInsertCommandType,
+    payload: { floor },
+  };
+}
+
+export function createProjectFloorDeleteProjectCommand(
+  floor: ProjectFloorSnapshot
+): ProjectFloorDeleteProjectCommand {
+  assertProjectFloorSnapshot(floor);
+  return {
+    schemaVersion: projectLocationStructureCommandSchemaVersion,
+    type: projectFloorDeleteCommandType,
+    payload: { floor },
+  };
+}
+
+export function createProjectRoomInsertProjectCommand(
+  room: ProjectRoomSnapshot
+): ProjectRoomInsertProjectCommand {
+  assertProjectRoomSnapshot(room);
+  return {
+    schemaVersion: projectLocationStructureCommandSchemaVersion,
+    type: projectRoomInsertCommandType,
+    payload: { room },
+  };
+}
+
+export function createProjectRoomDeleteProjectCommand(
+  room: ProjectRoomSnapshot
+): ProjectRoomDeleteProjectCommand {
+  assertProjectRoomSnapshot(room);
+  return {
+    schemaVersion: projectLocationStructureCommandSchemaVersion,
+    type: projectRoomDeleteCommandType,
+    payload: { room },
+  };
+}
+
+export function assertProjectFloorInsertProjectCommand(
+  command: SerializedProjectCommand<unknown>
+): asserts command is ProjectFloorInsertProjectCommand {
+  assertProjectFloorStructureProjectCommand(
+    command,
+    projectFloorInsertCommandType
+  );
+}
+
+export function assertProjectFloorDeleteProjectCommand(
+  command: SerializedProjectCommand<unknown>
+): asserts command is ProjectFloorDeleteProjectCommand {
+  assertProjectFloorStructureProjectCommand(
+    command,
+    projectFloorDeleteCommandType
+  );
+}
+
+export function assertProjectRoomInsertProjectCommand(
+  command: SerializedProjectCommand<unknown>
+): asserts command is ProjectRoomInsertProjectCommand {
+  assertProjectRoomStructureProjectCommand(
+    command,
+    projectRoomInsertCommandType
+  );
+}
+
+export function assertProjectRoomDeleteProjectCommand(
+  command: SerializedProjectCommand<unknown>
+): asserts command is ProjectRoomDeleteProjectCommand {
+  assertProjectRoomStructureProjectCommand(
+    command,
+    projectRoomDeleteCommandType
+  );
+}
+
+export function assertProjectFloorSnapshot(
+  floor: unknown
+): asserts floor is ProjectFloorSnapshot {
+  if (!isPlainObject(floor) || Object.keys(floor).length !== 4) {
+    throw new Error("Project-floor snapshot is invalid.");
+  }
+  assertNormalizedNonEmptyString(floor.id, "floor.id");
+  assertNormalizedNonEmptyString(floor.projectId, "floor.projectId");
+  assertNormalizedNonEmptyString(floor.name, "floor.name");
+  if (
+    typeof floor.sortOrder !== "number" ||
+    !Number.isSafeInteger(floor.sortOrder) ||
+    floor.sortOrder < 0
+  ) {
+    throw new Error("floor.sortOrder must be a non-negative integer.");
+  }
+}
+
+export function assertProjectRoomSnapshot(
+  room: unknown
+): asserts room is ProjectRoomSnapshot {
+  if (!isPlainObject(room) || Object.keys(room).length !== 5) {
+    throw new Error("Project-room snapshot is invalid.");
+  }
+  assertNormalizedNonEmptyString(room.id, "room.id");
+  assertNormalizedNonEmptyString(room.projectId, "room.projectId");
+  if (room.floorId !== null) {
+    assertNormalizedNonEmptyString(room.floorId, "room.floorId");
+  }
+  assertNormalizedNonEmptyString(room.roomNumber, "room.roomNumber");
+  assertNormalizedNonEmptyString(room.roomName, "room.roomName");
+}
+
+function assertProjectFloorStructureProjectCommand(
+  command: SerializedProjectCommand<unknown>,
+  expectedType:
+    | typeof projectFloorInsertCommandType
+    | typeof projectFloorDeleteCommandType
+) {
+  if (
+    command.schemaVersion !== projectLocationStructureCommandSchemaVersion ||
+    command.type !== expectedType ||
+    !isPlainObject(command.payload) ||
+    Object.keys(command.payload).length !== 1
+  ) {
+    throw new Error("Unsupported project-floor structure command.");
+  }
+  assertProjectFloorSnapshot(command.payload.floor);
+}
+
+function assertProjectRoomStructureProjectCommand(
+  command: SerializedProjectCommand<unknown>,
+  expectedType:
+    | typeof projectRoomInsertCommandType
+    | typeof projectRoomDeleteCommandType
+) {
+  if (
+    command.schemaVersion !== projectLocationStructureCommandSchemaVersion ||
+    command.type !== expectedType ||
+    !isPlainObject(command.payload) ||
+    Object.keys(command.payload).length !== 1
+  ) {
+    throw new Error("Unsupported project-room structure command.");
+  }
+  assertProjectRoomSnapshot(command.payload.room);
+}
+
+function assertNormalizedNonEmptyString(
+  value: unknown,
+  field: string
+): asserts value is string {
+  if (
+    typeof value !== "string" ||
+    !value ||
+    value !== value.trim()
+  ) {
+    throw new Error(`${field} must be a normalized non-empty string.`);
+  }
+}
+
+function isPlainObject(value: unknown): value is Record<string, unknown> {
+  return value !== null && typeof value === "object" && !Array.isArray(value);
+}

src/domain/ports/legacy-consumer-migration.store.ts

@@ -0,0 +1,143 @@
+export interface LegacyConsumerMigrationCircuitListReader {
+  findById(
+    projectId: string,
+    circuitListId: string
+  ): Promise<{ id: string } | null>;
+}
+
+export interface LegacyConsumerMigrationSection {
+  id: string;
+  key: string;
+  prefix: string;
+}
+
+export interface LegacyConsumerMigrationSectionStore {
+  createDefaults(circuitListId: string): Promise<void>;
+  listByCircuitList(
+    circuitListId: string
+  ): Promise<LegacyConsumerMigrationSection[]>;
+}
+
+export interface LegacyConsumerMigrationCircuitReader {
+  listByCircuitList(circuitListId: string): Promise<
+    Array<{
+      sectionId: string;
+      equipmentIdentifier: string;
+      sortOrder: number;
+    }>
+  >;
+}
+
+export interface LegacyConsumerMigrationRoomReader {
+  listByProject(projectId: string): Promise<
+    Array<{
+      id: string;
+      roomNumber: string;
+      roomName: string;
+    }>
+  >;
+}
+
+export interface LegacyConsumerSource {
+  id: string;
+  projectDeviceId: string | null;
+  roomId: string | null;
+  circuitNumber: string | null;
+  description: string | null;
+  name: string;
+  category: string | null;
+  deviceType: string | null;
+  phaseType: string | null;
+  tradeOrCostGroup: string | null;
+  protectionType: string | null;
+  protectionRatedCurrent: number | null;
+  protectionCharacteristic: string | null;
+  cableType: string | null;
+  cableCrossSection: string | null;
+  comment: string | null;
+  quantity: number;
+  installedPowerPerUnitKw: number;
+  demandFactor: number;
+  voltageV: number | null;
+  phaseCount: number | null;
+  powerFactor: number | null;
+  note: string | null;
+}
+
+export interface LegacyMigrationDeviceRowInput {
+  linkedProjectDeviceId?: string;
+  legacyConsumerId: string;
+  sortOrder: number;
+  name: string;
+  displayName: string;
+  phaseType?: string;
+  connectionKind?: string;
+  costGroup?: string;
+  category?: string;
+  level?: string;
+  roomId?: string;
+  roomNumberSnapshot?: string;
+  roomNameSnapshot?: string;
+  quantity: number;
+  powerPerUnit: number;
+  simultaneityFactor: number;
+  cosPhi?: number;
+  remark?: string;
+  overriddenFields?: string;
+}
+
+export interface LegacyMigrationCircuitInput {
+  circuit: {
+    circuitListId: string;
+    sectionId: string;
+    equipmentIdentifier: string;
+    displayName?: string;
+    sortOrder: number;
+    protectionType?: string;
+    protectionRatedCurrent?: number;
+    protectionCharacteristic?: string;
+    cableType?: string;
+    cableCrossSection?: string;
+    cableLength?: number;
+    voltage?: number;
+    controlRequirement?: string;
+    remark?: string;
+    rcdAssignment?: string;
+    terminalDesignation?: string;
+    status?: string;
+    isReserve?: boolean;
+  };
+  deviceRows: LegacyMigrationDeviceRowInput[];
+}
+
+export interface LegacyMigrationReportInput {
+  legacyConsumerCount: number;
+  createdCircuitCount: number;
+  createdDeviceRowCount: number;
+  duplicateGroupedCount: number;
+  generatedIdentifierCount: number;
+  unassignedRowCount: number;
+  warningsJson: string;
+  generatedIdentifiersJson: string;
+  duplicateGroupsJson: string;
+}
+
+export interface LegacyConsumerMigrationStore {
+  listSourceConsumersByCircuitList(
+    circuitListId: string
+  ): Promise<LegacyConsumerSource[]>;
+  listMigratedConsumerIds(circuitListId: string): Promise<string[]>;
+  persistCircuitListMigration(input: {
+    circuitListId: string;
+    circuits: LegacyMigrationCircuitInput[];
+    report: LegacyMigrationReportInput;
+  }): void;
+}
+
+export interface LegacyConsumerMigrationDependencies {
+  circuitListReader: LegacyConsumerMigrationCircuitListReader;
+  sectionStore: LegacyConsumerMigrationSectionStore;
+  circuitReader: LegacyConsumerMigrationCircuitReader;
+  roomReader: LegacyConsumerMigrationRoomReader;
+  migrationStore: LegacyConsumerMigrationStore;
+}

src/domain/ports/project-location-structure-project-command.store.ts

@@ -0,0 +1,26 @@
+import type { ProjectLocationStructureProjectCommand } from "../models/project-location-structure-project-command.model.js";
+import type {
+  AppendedProjectRevision,
+  ProjectRevisionSource,
+} from "./project-revision.store.js";
+
+export interface ExecuteProjectLocationStructureCommandInput {
+  projectId: string;
+  expectedRevision: number;
+  source: ProjectRevisionSource;
+  description?: string;
+  actorId?: string;
+  historyTargetChangeSetId?: string;
+  command: ProjectLocationStructureProjectCommand;
+}
+
+export interface ExecutedProjectLocationStructureCommand {
+  revision: AppendedProjectRevision;
+  inverse: ProjectLocationStructureProjectCommand;
+}
+
+export interface ProjectLocationStructureProjectCommandStore {
+  execute(
+    input: ExecuteProjectLocationStructureCommandInput
+  ): ExecutedProjectLocationStructureCommand;
+}

src/domain/ports/project-revision.store.ts

@@ -24,8 +24,3 @@ export interface AppendedProjectRevision {
   revisionNumber: number;
   createdAtIso: string;
 }
-
-export interface ProjectRevisionStore {
-  getCurrentRevision(projectId: string): number | null;
-  append(input: AppendProjectRevisionInput): AppendedProjectRevision;
-}

src/domain/services/circuit-numbering.service.ts

@@ -1,5 +1,19 @@
-import { CircuitRepository } from "../../db/repositories/circuit.repository.js";
+export interface CircuitNumberingSectionReader {
-import { CircuitSectionRepository } from "../../db/repositories/circuit-section.repository.js";
+  findById(
+    sectionId: string
+  ): Promise<{ prefix: string } | null>;
+}
+
+export interface CircuitNumberingCircuitReader {
+  listBySection(
+    sectionId: string
+  ): Promise<Array<{ equipmentIdentifier: string }>>;
+}
+
+export interface CircuitNumberingDependencies {
+  sectionRepository: CircuitNumberingSectionReader;
+  circuitRepository: CircuitNumberingCircuitReader;
+}
 
 function parseSuffix(equipmentIdentifier: string, prefix: string): number | null {
   if (!equipmentIdentifier.startsWith(prefix)) {
@@ -13,15 +27,12 @@ function parseSuffix(equipmentIdentifier: string, prefix: string): number | null
 }
 
 export class CircuitNumberingService {
-  private readonly sectionRepository: Pick<CircuitSectionRepository, "findById">;
+  private readonly sectionRepository: CircuitNumberingSectionReader;
-  private readonly circuitRepository: Pick<CircuitRepository, "listBySection">;
+  private readonly circuitRepository: CircuitNumberingCircuitReader;
 
-  constructor(deps?: {
+  constructor(deps: CircuitNumberingDependencies) {
-    sectionRepository?: Pick<CircuitSectionRepository, "findById">;
+    this.sectionRepository = deps.sectionRepository;
-    circuitRepository?: Pick<CircuitRepository, "listBySection">;
+    this.circuitRepository = deps.circuitRepository;
-  }) {
-    this.sectionRepository = deps?.sectionRepository ?? new CircuitSectionRepository();
-    this.circuitRepository = deps?.circuitRepository ?? new CircuitRepository();
   }
 
   async getNextIdentifier(sectionId: string) {

src/domain/services/legacy-consumer-migration.service.ts

@@ -1,25 +1,19 @@
-import { CircuitRepository } from "../../db/repositories/circuit.repository.js";
-import { CircuitListRepository } from "../../db/repositories/circuit-list.repository.js";
-import { CircuitSectionRepository } from "../../db/repositories/circuit-section.repository.js";
-import {
-  LegacyConsumerMigrationRepository,
-  type LegacyMigrationCircuitPersistenceInput,
-} from "../../db/repositories/legacy-consumer-migration.repository.js";
-import { RoomRepository } from "../../db/repositories/room.repository.js";
 import type { LegacyMigrationReport } from "../models/circuit-tree.model.js";
+import type {
+  LegacyConsumerMigrationDependencies,
+  LegacyConsumerSource,
+  LegacyMigrationCircuitInput,
+} from "../ports/legacy-consumer-migration.store.js";
 import {
   inferSectionKeyFromEquipmentIdentifier,
   inferSectionKeyFromLegacyInput,
   normalizeCircuitNumber,
 } from "./legacy-consumer-migration-planner.js";
 
-type LegacyConsumerRow = Awaited<
+function parseEquipmentSequence(
-  ReturnType<
+  equipmentIdentifier: string,
-    LegacyConsumerMigrationRepository["listSourceConsumersByCircuitList"]
+  prefix: string
-  >
+): number | null {
->[number];
-
-function parseEquipmentSequence(equipmentIdentifier: string, prefix: string): number | null {
   if (!equipmentIdentifier.startsWith(prefix)) {
     return null;
   }
@@ -30,43 +24,45 @@ function parseEquipmentSequence(equipmentIdentifier: string, prefix: string): nu
   return Number(suffix);
 }
 
-
 export class LegacyConsumerMigrationService {
-  private readonly circuitListRepository = new CircuitListRepository();
-  private readonly sectionRepository = new CircuitSectionRepository();
-  private readonly circuitRepository = new CircuitRepository();
-  private readonly roomRepository = new RoomRepository();
-
   constructor(
-    private readonly migrationRepository: LegacyConsumerMigrationRepository
+    private readonly dependencies: LegacyConsumerMigrationDependencies
   ) {}
 
-  async migrateCircuitList(projectId: string, circuitListId: string): Promise<LegacyMigrationReport> {
+  async migrateCircuitList(
+    projectId: string,
+    circuitListId: string
+  ): Promise<LegacyMigrationReport> {
     // Migration is additive: legacy consumers are preserved, and circuit-first entities are created
     // with mapping records so transition remains auditable and reversible.
-    const list = await this.circuitListRepository.findById(projectId, circuitListId);
+    const list = await this.dependencies.circuitListReader.findById(
+      projectId,
+      circuitListId
+    );
     if (!list) {
       throw new Error("Circuit list not found in project.");
     }
 
-    await this.sectionRepository.createDefaults(circuitListId);
+    await this.dependencies.sectionStore.createDefaults(circuitListId);
-    const sections = await this.sectionRepository.listByCircuitList(circuitListId);
+    const sections =
+      await this.dependencies.sectionStore.listByCircuitList(circuitListId);
     const sectionByKey = new Map(sections.map((section) => [section.key, section]));
     const unassignedSection = sectionByKey.get("unassigned");
     if (!unassignedSection) {
       throw new Error("Unassigned section is required.");
     }
 
-    const existingCircuits = await this.circuitRepository.listByCircuitList(circuitListId);
+    const existingCircuits =
+      await this.dependencies.circuitReader.listByCircuitList(circuitListId);
     const usedEquipmentIdentifiers = new Set(
       existingCircuits.map((circuit) => circuit.equipmentIdentifier.toUpperCase())
     );
 
     const legacyConsumers =
-      await this.migrationRepository.listSourceConsumersByCircuitList(
+      await this.dependencies.migrationStore.listSourceConsumersByCircuitList(
         circuitListId
       );
-    const rooms = await this.roomRepository.listByProject(projectId);
+    const rooms = await this.dependencies.roomReader.listByProject(projectId);
     const roomById = new Map(rooms.map((room) => [room.id, room]));
 
     const report: LegacyMigrationReport = {
@@ -82,14 +78,16 @@ export class LegacyConsumerMigrationService {
 
     // Idempotency guard: skip consumers already mapped in previous migration run.
     const migratedConsumerIds = new Set(
-      await this.migrationRepository.listMigratedConsumerIds(circuitListId)
+      await this.dependencies.migrationStore.listMigratedConsumerIds(
+        circuitListId
+      )
     );
     const consumersToMigrate = legacyConsumers.filter((consumer) => !migratedConsumerIds.has(consumer.id));
 
     // Legacy rows are grouped by normalized circuit number so duplicates become
     // multiple device rows within one circuit instead of duplicate circuits.
-    const byNormalizedCircuitNumber = new Map<string, LegacyConsumerRow[]>();
+    const byNormalizedCircuitNumber = new Map<string, LegacyConsumerSource[]>();
-    const withoutNormalizedCircuitNumber: LegacyConsumerRow[] = [];
+    const withoutNormalizedCircuitNumber: LegacyConsumerSource[] = [];
     for (const consumer of consumersToMigrate) {
       const normalized = normalizeCircuitNumber(consumer.circuitNumber ?? null);
       if (!normalized) {
@@ -110,7 +108,7 @@ export class LegacyConsumerMigrationService {
 
     const groups: Array<{
       equipmentIdentifier: string | null;
-      consumers: LegacyConsumerRow[];
+      consumers: LegacyConsumerSource[];
       inferredSectionKey: string | null;
       isGeneratedIdentifier: boolean;
     }> = [];
@@ -152,7 +150,7 @@ export class LegacyConsumerMigrationService {
       maxBySectionPrefix.set(section.prefix.toUpperCase(), Math.max(current, sequence));
     }
 
-    const migrationCircuits: LegacyMigrationCircuitPersistenceInput[] = [];
+    const migrationCircuits: LegacyMigrationCircuitInput[] = [];
     for (const group of groups) {
       const representative = group.consumers[0];
       let section = group.inferredSectionKey ? sectionByKey.get(group.inferredSectionKey) : null;
@@ -181,7 +179,7 @@ export class LegacyConsumerMigrationService {
 
       usedEquipmentIdentifiers.add(equipmentIdentifier.toUpperCase());
 
-      const deviceRows: LegacyMigrationCircuitPersistenceInput["deviceRows"] = [];
+      const deviceRows: LegacyMigrationCircuitInput["deviceRows"] = [];
       const circuitSortOrder = nextSortOrder;
       nextSortOrder += 10;
 
@@ -250,7 +248,7 @@ export class LegacyConsumerMigrationService {
       report.warnings.push(`Consumer ${row.consumerId} was migrated into unassigned section.`);
     }
 
-    this.migrationRepository.persistCircuitListMigration({
+    this.dependencies.migrationStore.persistCircuitListMigration({
       circuitListId,
       circuits: migrationCircuits,
       report: {

src/domain/services/project-command.service.ts

@@ -47,6 +47,16 @@ import {
   assertSerializedProjectCommand,
   type SerializedProjectCommand,
 } from "../models/project-command.model.js";
+import {
+  assertProjectFloorDeleteProjectCommand,
+  assertProjectFloorInsertProjectCommand,
+  assertProjectRoomDeleteProjectCommand,
+  assertProjectRoomInsertProjectCommand,
+  projectFloorDeleteCommandType,
+  projectFloorInsertCommandType,
+  projectRoomDeleteCommandType,
+  projectRoomInsertCommandType,
+} from "../models/project-location-structure-project-command.model.js";
 import {
   assertProjectStateRestoreCommand,
   projectStateRestoreCommandType,
@@ -87,6 +97,7 @@ import type {
   ProjectHistoryDirection,
   ProjectHistoryStore,
 } from "../ports/project-history.store.js";
+import type { ProjectLocationStructureProjectCommandStore } from "../ports/project-location-structure-project-command.store.js";
 import type { ProjectDeviceProjectCommandStore } from "../ports/project-device-project-command.store.js";
 import type { ProjectDeviceRowSyncProjectCommandStore } from "../ports/project-device-row-sync-project-command.store.js";
 import type { ProjectDeviceStructureProjectCommandStore } from "../ports/project-device-structure-project-command.store.js";
@@ -112,6 +123,7 @@ export class ProjectCommandService implements ProjectCommandExecutor {
     private readonly deviceRowMoveStore: CircuitDeviceRowMoveProjectCommandStore,
     private readonly circuitStructureStore: CircuitStructureProjectCommandStore,
     private readonly distributionBoardStructureStore: DistributionBoardStructureProjectCommandStore,
+    private readonly projectLocationStructureStore: ProjectLocationStructureProjectCommandStore,
     private readonly circuitSectionReorderStore: CircuitSectionReorderProjectCommandStore,
     private readonly circuitSectionRenumberStore: CircuitSectionRenumberProjectCommandStore,
     private readonly projectDeviceStructureStore: ProjectDeviceStructureProjectCommandStore,
@@ -273,6 +285,34 @@ export class ProjectCommandService implements ProjectCommandExecutor {
           command: input.command,
         }).revision;
       }
+      case projectFloorInsertCommandType: {
+        assertProjectFloorInsertProjectCommand(input.command);
+        return this.projectLocationStructureStore.execute({
+          ...input,
+          command: input.command,
+        }).revision;
+      }
+      case projectFloorDeleteCommandType: {
+        assertProjectFloorDeleteProjectCommand(input.command);
+        return this.projectLocationStructureStore.execute({
+          ...input,
+          command: input.command,
+        }).revision;
+      }
+      case projectRoomInsertCommandType: {
+        assertProjectRoomInsertProjectCommand(input.command);
+        return this.projectLocationStructureStore.execute({
+          ...input,
+          command: input.command,
+        }).revision;
+      }
+      case projectRoomDeleteCommandType: {
+        assertProjectRoomDeleteProjectCommand(input.command);
+        return this.projectLocationStructureStore.execute({
+          ...input,
+          command: input.command,
+        }).revision;
+      }
       case circuitSectionReorderCommandType: {
         assertCircuitSectionReorderProjectCommand(input.command);
         return this.circuitSectionReorderStore.execute({

src/domain/services/project-device-sync.service.ts

@@ -1,5 +1,3 @@
-import { CircuitDeviceRowRepository } from "../../db/repositories/circuit-device-row.repository.js";
-import { ProjectDeviceRepository } from "../../db/repositories/project-device.repository.js";
 import {
   createProjectDeviceRowSyncProjectCommand,
   projectDeviceSyncRowSnapshotFields,
@@ -20,15 +18,44 @@ export {
   serializeOverriddenFields,
 } from "./project-device-overrides.js";
 
-type ProjectDevice = NonNullable<Awaited<ReturnType<ProjectDeviceRepository["findById"]>>>;
+export type ProjectDeviceSyncSource = {
-type LinkedRow = Awaited<ReturnType<CircuitDeviceRowRepository["listLinkedByProjectDevice"]>>[number];
+  id: string;
+} & Pick<ProjectDeviceSyncRowSnapshot, ProjectDeviceSyncField>;
 
-type SyncDependencies = {
+export type LinkedProjectDeviceRow = ProjectDeviceSyncRowSnapshot & {
-  projectDeviceRepository: Pick<ProjectDeviceRepository, "findById">;
+  id: string;
-  deviceRowRepository: Pick<CircuitDeviceRowRepository, "listLinkedByProjectDevice">;
+  circuitId: string;
+  equipmentIdentifier: string;
+  circuitDisplayName: string | null;
+  circuitListId: string;
+  circuitListName: string;
+  distributionBoardId: string;
+  distributionBoardName: string;
 };
 
-function sourceValue(projectDevice: ProjectDevice, field: ProjectDeviceSyncField) {
+export interface ProjectDeviceSyncSourceReader {
+  findById(
+    projectId: string,
+    projectDeviceId: string
+  ): Promise<ProjectDeviceSyncSource | null>;
+}
+
+export interface LinkedProjectDeviceRowReader {
+  listLinkedByProjectDevice(
+    projectId: string,
+    projectDeviceId: string
+  ): Promise<LinkedProjectDeviceRow[]>;
+}
+
+export interface ProjectDeviceSyncDependencies {
+  projectDeviceRepository: ProjectDeviceSyncSourceReader;
+  deviceRowRepository: LinkedProjectDeviceRowReader;
+}
+
+function sourceValue(
+  projectDevice: ProjectDeviceSyncSource,
+  field: ProjectDeviceSyncField
+) {
   return projectDevice[field];
 }
 
@@ -36,7 +63,10 @@ function valuesEqual(left: unknown, right: unknown) {
   return (left ?? null) === (right ?? null);
 }
 
-function buildDifferences(projectDevice: ProjectDevice, row: LinkedRow) {
+function buildDifferences(
+  projectDevice: ProjectDeviceSyncSource,
+  row: LinkedProjectDeviceRow
+) {
   return projectDeviceSyncFields
     .filter((field) => !valuesEqual(row[field], sourceValue(projectDevice, field)))
     .map((field) => ({
@@ -48,12 +78,12 @@ function buildDifferences(projectDevice: ProjectDevice, row: LinkedRow) {
 }
 
 export class ProjectDeviceSyncService {
-  private readonly projectDeviceRepository: SyncDependencies["projectDeviceRepository"];
+  private readonly projectDeviceRepository: ProjectDeviceSyncSourceReader;
-  private readonly deviceRowRepository: SyncDependencies["deviceRowRepository"];
+  private readonly deviceRowRepository: LinkedProjectDeviceRowReader;
 
-  constructor(deps?: Partial<SyncDependencies>) {
+  constructor(deps: ProjectDeviceSyncDependencies) {
-    this.projectDeviceRepository = deps?.projectDeviceRepository ?? new ProjectDeviceRepository();
+    this.projectDeviceRepository = deps.projectDeviceRepository;
-    this.deviceRowRepository = deps?.deviceRowRepository ?? new CircuitDeviceRowRepository();
+    this.deviceRowRepository = deps.deviceRowRepository;
   }
 
   async getPreview(projectId: string, projectDeviceId: string) {
@@ -154,10 +184,15 @@ export class ProjectDeviceSyncService {
     );
   }
 
-  private resolveSelectedRows(linkedRows: LinkedRow[], rowIds: string[]) {
+  private resolveSelectedRows(
+    linkedRows: LinkedProjectDeviceRow[],
+    rowIds: string[]
+  ) {
     const uniqueRowIds = [...new Set(rowIds)];
     const byId = new Map(linkedRows.map((row) => [row.id, row]));
-    const selectedRows = uniqueRowIds.map((rowId) => byId.get(rowId)).filter(Boolean) as LinkedRow[];
+    const selectedRows = uniqueRowIds
+      .map((rowId) => byId.get(rowId))
+      .filter(Boolean) as LinkedProjectDeviceRow[];
     if (selectedRows.length !== uniqueRowIds.length) {
       throw new Error("One or more rows are not linked to this project device.");
     }
@@ -166,7 +201,9 @@ export class ProjectDeviceSyncService {
 
 }
 
-function toSyncSnapshot(row: LinkedRow): ProjectDeviceSyncRowSnapshot {
+function toSyncSnapshot(
+  row: LinkedProjectDeviceRow
+): ProjectDeviceSyncRowSnapshot {
   return {
     linkedProjectDeviceId: row.linkedProjectDeviceId,
     name: row.name,

src/frontend/types.ts

@@ -106,6 +106,11 @@ export interface FloorDto {
   sortOrder: number;
 }
 
+export interface ProjectFloorCommandResultDto
+  extends ProjectCommandResultDto {
+  floor: FloorDto;
+}
+
 export interface RoomDto {
   id: string;
   projectId: string;
@@ -146,6 +151,11 @@ export interface ProjectDeviceDto {
   voltageV: number | null;
 }
 
+export interface ProjectRoomCommandResultDto
+  extends ProjectCommandResultDto {
+  room: RoomDto;
+}
+
 export interface ProjectDeviceCommandResultDto
   extends ProjectCommandResultDto {
   projectDevice: ProjectDeviceDto;

src/frontend/utils/api.ts

@@ -12,11 +12,13 @@ import type {
   ProjectCommandResultDto,
   ProjectDeviceCommandResultDto,
   ProjectDeviceDto,
+  ProjectFloorCommandResultDto,
   ProjectHistoryStateDto,
   ProjectRevisionPageDto,
   ProjectSnapshotMetadataDto,
   ProjectSnapshotRestoreResultDto,
   ProjectSettingsCommandResultDto,
+  ProjectRoomCommandResultDto,
   ProjectDeviceSyncCommandResultDto,
   ProjectDeviceSyncPreviewDto,
   ProjectDto,
@@ -454,22 +456,36 @@ export function listFloors(projectId: string) {
   return request<FloorDto[]>(`/api/projects/${projectId}/floors`);
 }
 
-export function createFloor(projectId: string, input: CreateFloorInput) {
+export function createFloor(
-  return request<FloorDto>(`/api/projects/${projectId}/floors`, {
+  projectId: string,
+  input: CreateFloorInput,
+  expectedRevision: number
+) {
+  return request<ProjectFloorCommandResultDto>(
+    `/api/projects/${projectId}/floors`,
+    {
       method: "POST",
-    body: JSON.stringify(input),
+      body: JSON.stringify({ ...input, expectedRevision }),
-  });
+    }
+  );
 }
 
 export function listRooms(projectId: string) {
   return request<RoomDto[]>(`/api/projects/${projectId}/rooms`);
 }
 
-export function createRoom(projectId: string, input: CreateRoomInput) {
+export function createRoom(
-  return request<RoomDto>(`/api/projects/${projectId}/rooms`, {
+  projectId: string,
+  input: CreateRoomInput,
+  expectedRevision: number
+) {
+  return request<ProjectRoomCommandResultDto>(
+    `/api/projects/${projectId}/rooms`,
+    {
       method: "POST",
-    body: JSON.stringify(input),
+      body: JSON.stringify({ ...input, expectedRevision }),
-  });
+    }
+  );
 }
 
 export function listGlobalDevices() {

src/frontend/utils/project-version-history.ts

@@ -32,6 +32,10 @@ const commandTypeLabels: Record<string, string> = {
   "project.update-settings": "Projekteinstellungen bearbeitet",
   "distribution-board.insert": "Verteilung angelegt",
   "distribution-board.delete": "Verteilung entfernt",
+  "project-floor.insert": "Geschoss angelegt",
+  "project-floor.delete": "Geschoss entfernt",
+  "project-room.insert": "Raum angelegt",
+  "project-room.delete": "Raum entfernt",
   "project.restore-state": "Projektstand wiederhergestellt",
 };
 

src/server/composition/application-repositories.ts

@@ -0,0 +1,24 @@
+import { db } from "../../db/client.js";
+import { CircuitDeviceRowRepository } from "../../db/repositories/circuit-device-row.repository.js";
+import { CircuitListRepository } from "../../db/repositories/circuit-list.repository.js";
+import { CircuitSectionRepository } from "../../db/repositories/circuit-section.repository.js";
+import { CircuitRepository } from "../../db/repositories/circuit.repository.js";
+import { DistributionBoardRepository } from "../../db/repositories/distribution-board.repository.js";
+import { FloorRepository } from "../../db/repositories/floor.repository.js";
+import { GlobalDeviceRepository } from "../../db/repositories/global-device.repository.js";
+import { ProjectDeviceRepository } from "../../db/repositories/project-device.repository.js";
+import { ProjectRepository } from "../../db/repositories/project.repository.js";
+import { RoomRepository } from "../../db/repositories/room.repository.js";
+
+export const circuitDeviceRowRepository =
+  new CircuitDeviceRowRepository(db);
+export const circuitListRepository = new CircuitListRepository(db);
+export const circuitSectionRepository = new CircuitSectionRepository(db);
+export const circuitRepository = new CircuitRepository(db);
+export const distributionBoardRepository =
+  new DistributionBoardRepository(db);
+export const floorRepository = new FloorRepository(db);
+export const globalDeviceRepository = new GlobalDeviceRepository(db);
+export const projectDeviceRepository = new ProjectDeviceRepository(db);
+export const projectRepository = new ProjectRepository(db);
+export const roomRepository = new RoomRepository(db);

src/server/composition/circuit-numbering-service.ts

@@ -1,3 +1,10 @@
 import { CircuitNumberingService } from "../../domain/services/circuit-numbering.service.js";
+import {
+  circuitRepository,
+  circuitSectionRepository,
+} from "./application-repositories.js";
 
-export const circuitNumberingService = new CircuitNumberingService();
+export const circuitNumberingService = new CircuitNumberingService({
+  sectionRepository: circuitSectionRepository,
+  circuitRepository,
+});

src/server/composition/project-command-stores.ts

@@ -8,6 +8,7 @@ import { CircuitSectionRenumberProjectCommandRepository } from "../../db/reposit
 import { CircuitStructureProjectCommandRepository } from "../../db/repositories/circuit-structure-project-command.repository.js";
 import { DistributionBoardStructureProjectCommandRepository } from "../../db/repositories/distribution-board-structure-project-command.repository.js";
 import { ProjectHistoryRepository } from "../../db/repositories/project-history.repository.js";
+import { ProjectLocationStructureProjectCommandRepository } from "../../db/repositories/project-location-structure-project-command.repository.js";
 import { ProjectDeviceProjectCommandRepository } from "../../db/repositories/project-device-project-command.repository.js";
 import { ProjectDeviceRowSyncProjectCommandRepository } from "../../db/repositories/project-device-row-sync-project-command.repository.js";
 import { ProjectDeviceStructureProjectCommandRepository } from "../../db/repositories/project-device-structure-project-command.repository.js";
@@ -26,6 +27,8 @@ export const circuitStructureProjectCommandStore =
   new CircuitStructureProjectCommandRepository(db);
 export const distributionBoardStructureProjectCommandStore =
   new DistributionBoardStructureProjectCommandRepository(db);
+export const projectLocationStructureProjectCommandStore =
+  new ProjectLocationStructureProjectCommandRepository(db);
 export const circuitSectionReorderProjectCommandStore =
   new CircuitSectionReorderProjectCommandRepository(db);
 export const circuitSectionRenumberProjectCommandStore =
@@ -48,6 +51,7 @@ export const projectCommandService = new ProjectCommandService(
   circuitDeviceRowMoveProjectCommandStore,
   circuitStructureProjectCommandStore,
   distributionBoardStructureProjectCommandStore,
+  projectLocationStructureProjectCommandStore,
   circuitSectionReorderProjectCommandStore,
   circuitSectionRenumberProjectCommandStore,
   projectDeviceStructureProjectCommandStore,

src/server/composition/project-device-sync-service.ts

@@ -1,3 +1,10 @@
 import { ProjectDeviceSyncService } from "../../domain/services/project-device-sync.service.js";
+import {
+  circuitDeviceRowRepository,
+  projectDeviceRepository,
+} from "./application-repositories.js";
 
-export const projectDeviceSyncService = new ProjectDeviceSyncService();
+export const projectDeviceSyncService = new ProjectDeviceSyncService({
+  projectDeviceRepository,
+  deviceRowRepository: circuitDeviceRowRepository,
+});

src/server/controllers/circuit-list.controller.ts

@@ -1,7 +1,5 @@
 import type { Request, Response } from "express";
-import { CircuitListRepository } from "../../db/repositories/circuit-list.repository.js";
+import { circuitListRepository } from "../composition/application-repositories.js";
-
-const circuitListRepository = new CircuitListRepository();
 
 export async function listCircuitListsByProject(req: Request, res: Response) {
   const { projectId } = req.params;

src/server/controllers/circuit-tree.controller.ts

@@ -1,20 +1,16 @@
 import type { Request, Response } from "express";
-import { CircuitRepository } from "../../db/repositories/circuit.repository.js";
-import { CircuitDeviceRowRepository } from "../../db/repositories/circuit-device-row.repository.js";
-import { CircuitListRepository } from "../../db/repositories/circuit-list.repository.js";
-import { CircuitSectionRepository } from "../../db/repositories/circuit-section.repository.js";
-import { ProjectRepository } from "../../db/repositories/project.repository.js";
 import {
   calculateCircuitTotalPower,
   calculateRowTotalPower,
 } from "../../domain/calculations/circuit-power-calculation.js";
 import type { CircuitTreeResponse } from "../../domain/models/circuit-tree.model.js";
-
+import {
-const circuitListRepository = new CircuitListRepository();
+  circuitDeviceRowRepository,
-const circuitSectionRepository = new CircuitSectionRepository();
+  circuitListRepository,
-const circuitRepository = new CircuitRepository();
+  circuitRepository,
-const circuitDeviceRowRepository = new CircuitDeviceRowRepository();
+  circuitSectionRepository,
-const projectRepository = new ProjectRepository();
+  projectRepository,
+} from "../composition/application-repositories.js";
 
 export function isMissingCircuitTreeSchemaError(error: unknown): boolean {
   if (!(error instanceof Error)) {

src/server/controllers/distribution-board.controller.ts

@@ -1,16 +1,13 @@
 import type { Request, Response } from "express";
-import { db } from "../../db/client.js";
-import { DistributionBoardRepository } from "../../db/repositories/distribution-board.repository.js";
 import {
   createDistributionBoardInsertProjectCommand,
   createDistributionBoardStructureSnapshot,
 } from "../../domain/models/distribution-board-structure-project-command.model.js";
 import { createDistributionBoardSchema } from "../../shared/validation/project-structure.schemas.js";
 import { projectCommandService } from "../composition/project-command-stores.js";
+import { distributionBoardRepository } from "../composition/application-repositories.js";
 import { respondWithProjectCommandError } from "./project-command.controller.js";
 
-const distributionBoardRepository = new DistributionBoardRepository(db);
-
 export async function listDistributionBoardsByProject(req: Request, res: Response) {
   const { projectId } = req.params;
   if (typeof projectId !== "string") {

src/server/controllers/floor.controller.ts

@@ -1,8 +1,12 @@
 import type { Request, Response } from "express";
-import { FloorRepository } from "../../db/repositories/floor.repository.js";
+import {
+  createProjectFloorInsertProjectCommand,
+  createProjectFloorSnapshot,
+} from "../../domain/models/project-location-structure-project-command.model.js";
 import { createFloorSchema } from "../../shared/validation/project-structure.schemas.js";
-
+import { projectCommandService } from "../composition/project-command-stores.js";
-const floorRepository = new FloorRepository();
+import { floorRepository } from "../composition/application-repositories.js";
+import { respondWithProjectCommandError } from "./project-command.controller.js";
 
 export async function listFloorsByProject(req: Request, res: Response) {
   const { projectId } = req.params;
@@ -25,6 +29,24 @@ export async function createFloor(req: Request, res: Response) {
     return res.status(400).json({ error: parsed.error.flatten() });
   }
 
-  const floor = await floorRepository.create(projectId, parsed.data.name);
+  const existingFloors = await floorRepository.listByProject(projectId);
-  return res.status(201).json(floor);
+  const nextSortOrder = existingFloors.length
+    ? Math.max(...existingFloors.map((floor) => floor.sortOrder)) + 1
+    : 0;
+  const floor = createProjectFloorSnapshot(
+    projectId,
+    parsed.data.name,
+    nextSortOrder
+  );
+  try {
+    const result = projectCommandService.executeUser({
+      projectId,
+      expectedRevision: parsed.data.expectedRevision,
+      description: "Geschoss anlegen",
+      command: createProjectFloorInsertProjectCommand(floor),
+    });
+    return res.status(201).json({ ...result, floor });
+  } catch (error) {
+    return respondWithProjectCommandError(error, res);
+  }
 }

src/server/controllers/global-device.controller.ts

@@ -1,13 +1,12 @@
 import type { Request, Response } from "express";
-import { GlobalDeviceRepository } from "../../db/repositories/global-device.repository.js";
-import { ProjectDeviceRepository } from "../../db/repositories/project-device.repository.js";
 import {
   createGlobalDeviceSchema,
   updateGlobalDeviceSchema,
 } from "../../shared/validation/global-device.schemas.js";
-
+import {
-const globalDeviceRepository = new GlobalDeviceRepository();
+  globalDeviceRepository,
-const projectDeviceRepository = new ProjectDeviceRepository();
+  projectDeviceRepository,
+} from "../composition/application-repositories.js";
 
 export async function listGlobalDevices(_req: Request, res: Response) {
   const rows = await globalDeviceRepository.list();

src/server/controllers/project-device.controller.ts

@@ -1,7 +1,5 @@
 import { randomUUID } from "node:crypto";
 import type { Request, Response } from "express";
-import { GlobalDeviceRepository } from "../../db/repositories/global-device.repository.js";
-import { ProjectDeviceRepository } from "../../db/repositories/project-device.repository.js";
 import { createProjectDeviceUpdateProjectCommand } from "../../domain/models/project-device-project-command.model.js";
 import {
   createProjectDeviceDeleteProjectCommand,
@@ -10,6 +8,10 @@ import {
 } from "../../domain/models/project-device-structure-project-command.model.js";
 import { projectDeviceSyncService } from "../composition/project-device-sync-service.js";
 import { projectCommandService } from "../composition/project-command-stores.js";
+import {
+  globalDeviceRepository,
+  projectDeviceRepository,
+} from "../composition/application-repositories.js";
 import {
   createProjectDeviceCommandSchema,
   disconnectProjectDeviceRowsSchema,
@@ -20,8 +22,6 @@ import {
 import type { CreateProjectDeviceInput } from "../../shared/validation/project-device.schemas.js";
 import { respondWithProjectCommandError } from "./project-command.controller.js";
 
-const globalDeviceRepository = new GlobalDeviceRepository();
-const projectDeviceRepository = new ProjectDeviceRepository();
 export async function listProjectDevicesByProject(req: Request, res: Response) {
   const { projectId } = req.params;
   if (typeof projectId !== "string") {

src/server/controllers/project.controller.ts

@@ -1,15 +1,13 @@
 import type { Request, Response } from "express";
-import { ProjectRepository } from "../../db/repositories/project.repository.js";
 import {
   createProjectSchema,
   updateProjectSettingsSchema,
 } from "../../shared/validation/project-structure.schemas.js";
 import { createProjectSettingsUpdateProjectCommand } from "../../domain/models/project-settings-project-command.model.js";
 import { projectCommandService } from "../composition/project-command-stores.js";
+import { projectRepository } from "../composition/application-repositories.js";
 import { respondWithProjectCommandError } from "./project-command.controller.js";
 
-const projectRepository = new ProjectRepository();
-
 export async function listProjects(_req: Request, res: Response) {
   const result = await projectRepository.list();
   res.json(result);

src/server/controllers/room.controller.ts

@@ -1,10 +1,12 @@
 import type { Request, Response } from "express";
-import { FloorRepository } from "../../db/repositories/floor.repository.js";
+import {
-import { RoomRepository } from "../../db/repositories/room.repository.js";
+  createProjectRoomInsertProjectCommand,
+  createProjectRoomSnapshot,
+} from "../../domain/models/project-location-structure-project-command.model.js";
 import { createRoomSchema } from "../../shared/validation/project-structure.schemas.js";
-
+import { projectCommandService } from "../composition/project-command-stores.js";
-const floorRepository = new FloorRepository();
+import { roomRepository } from "../composition/application-repositories.js";
-const roomRepository = new RoomRepository();
+import { respondWithProjectCommandError } from "./project-command.controller.js";
 
 export async function listRoomsByProject(req: Request, res: Response) {
   const { projectId } = req.params;
@@ -27,13 +29,16 @@ export async function createRoom(req: Request, res: Response) {
     return res.status(400).json({ error: parsed.error.flatten() });
   }
 
-  if (parsed.data.floorId) {
+  const room = createProjectRoomSnapshot(projectId, parsed.data);
-    const hasValidFloor = await floorRepository.existsInProject(projectId, parsed.data.floorId);
+  try {
-    if (!hasValidFloor) {
+    const result = projectCommandService.executeUser({
-      return res.status(400).json({ error: "Floor does not belong to the provided project." });
+      projectId,
+      expectedRevision: parsed.data.expectedRevision,
+      description: "Raum anlegen",
+      command: createProjectRoomInsertProjectCommand(room),
+    });
+    return res.status(201).json({ ...result, room });
+  } catch (error) {
+    return respondWithProjectCommandError(error, res);
   }
 }
-
-  const room = await roomRepository.create(projectId, parsed.data);
-  return res.status(201).json(room);
-}

src/shared/validation/project-structure.schemas.ts

@@ -22,15 +22,21 @@ export const createDistributionBoardSchema = z
   })
   .strict();
 
-export const createFloorSchema = z.object({
+export const createFloorSchema = z
-  name: z.string().min(1),
+  .object({
-});
+    expectedRevision: expectedProjectRevisionSchema,
+    name: z.string().trim().min(1),
+  })
+  .strict();
 
-export const createRoomSchema = z.object({
+export const createRoomSchema = z
-  floorId: z.string().min(1).optional(),
+  .object({
-  roomNumber: z.string().min(1),
+    expectedRevision: expectedProjectRevisionSchema,
-  roomName: z.string().min(1),
+    floorId: z.string().trim().min(1).optional(),
-});
+    roomNumber: z.string().trim().min(1),
+    roomName: z.string().trim().min(1),
+  })
+  .strict();
 
 export type CreateProjectInput = z.infer<typeof createProjectSchema>;
 export type UpdateProjectSettingsInput = z.infer<
@@ -39,5 +45,3 @@ export type UpdateProjectSettingsInput = z.infer<
 export type CreateDistributionBoardInput = z.infer<
   typeof createDistributionBoardSchema
 >;
-export type CreateFloorInput = z.infer<typeof createFloorSchema>;
-export type CreateRoomInput = z.infer<typeof createRoomSchema>;

tests/circuit-device-row-move-project-command.repository.test.ts

@@ -8,7 +8,7 @@ import {
   type DatabaseContext,
 } from "../src/db/database-context.js";
 import { CircuitDeviceRowMoveProjectCommandRepository } from "../src/db/repositories/circuit-device-row-move-project-command.repository.js";
-import { DistributionBoardRepository } from "../src/db/repositories/distribution-board.repository.js";
+import { DistributionBoardFixtureRepository } from "./support/distribution-board-fixture.js";
 import { ProjectHistoryRepository } from "../src/db/repositories/project-history.repository.js";
 import { circuitDeviceRows } from "../src/db/schema/circuit-device-rows.js";
 import { circuitSections } from "../src/db/schema/circuit-sections.js";
@@ -39,7 +39,7 @@ function createTestDatabase(): TestFixture {
       { id: "project-2", name: "Other project" },
     ])
     .run();
-  const boards = new DistributionBoardRepository(context.db);
+  const boards = new DistributionBoardFixtureRepository(context.db);
   const board = boards.createWithCircuitListAndDefaultSections(
     "project-1",
     "UV-01"

tests/circuit-device-row-project-command.repository.test.ts

@@ -8,7 +8,7 @@ import {
   type DatabaseContext,
 } from "../src/db/database-context.js";
 import { CircuitDeviceRowProjectCommandRepository } from "../src/db/repositories/circuit-device-row-project-command.repository.js";
-import { DistributionBoardRepository } from "../src/db/repositories/distribution-board.repository.js";
+import { DistributionBoardFixtureRepository } from "./support/distribution-board-fixture.js";
 import { circuitDeviceRows } from "../src/db/schema/circuit-device-rows.js";
 import { circuitSections } from "../src/db/schema/circuit-sections.js";
 import { circuits } from "../src/db/schema/circuits.js";
@@ -34,7 +34,7 @@ function createTestDatabase(): DatabaseContext {
     ])
     .run();
 
-  const boards = new DistributionBoardRepository(context.db);
+  const boards = new DistributionBoardFixtureRepository(context.db);
   const board = boards.createWithCircuitListAndDefaultSections(
     "project-1",
     "UV-01"

tests/circuit-device-row-structure-project-command.repository.test.ts

@@ -8,7 +8,7 @@ import {
   type DatabaseContext,
 } from "../src/db/database-context.js";
 import { CircuitDeviceRowStructureProjectCommandRepository } from "../src/db/repositories/circuit-device-row-structure-project-command.repository.js";
-import { DistributionBoardRepository } from "../src/db/repositories/distribution-board.repository.js";
+import { DistributionBoardFixtureRepository } from "./support/distribution-board-fixture.js";
 import { ProjectHistoryRepository } from "../src/db/repositories/project-history.repository.js";
 import { circuitDeviceRows } from "../src/db/schema/circuit-device-rows.js";
 import { circuitSections } from "../src/db/schema/circuit-sections.js";
@@ -36,7 +36,7 @@ function createTestDatabase(): DatabaseContext {
     ])
     .run();
 
-  const boards = new DistributionBoardRepository(context.db);
+  const boards = new DistributionBoardFixtureRepository(context.db);
   const board = boards.createWithCircuitListAndDefaultSections(
     "project-1",
     "UV-01"

tests/circuit-numbering.service.test.ts

@@ -7,7 +7,7 @@ describe("circuit numbering service", () => {
     const service = new CircuitNumberingService({
       sectionRepository: {
         async findById() {
-          return { id: "s1", prefix: "-2F" } as never;
+          return { prefix: "-2F" };
         },
       },
       circuitRepository: {
@@ -18,7 +18,7 @@ describe("circuit numbering service", () => {
             { equipmentIdentifier: "-2F5" },
             { equipmentIdentifier: "-2FX" },
             { equipmentIdentifier: "-1F9" },
-          ] as never[];
+          ];
         },
       },
     });

tests/circuit-project-command.repository.test.ts

@@ -8,7 +8,7 @@ import {
   type DatabaseContext,
 } from "../src/db/database-context.js";
 import { CircuitProjectCommandRepository } from "../src/db/repositories/circuit-project-command.repository.js";
-import { DistributionBoardRepository } from "../src/db/repositories/distribution-board.repository.js";
+import { DistributionBoardFixtureRepository } from "./support/distribution-board-fixture.js";
 import { projectChangeSets } from "../src/db/schema/project-change-sets.js";
 import { projectRevisions } from "../src/db/schema/project-revisions.js";
 import { circuitSections } from "../src/db/schema/circuit-sections.js";
@@ -38,7 +38,7 @@ function createTestFixture(): TestFixture {
     ])
     .run();
 
-  const repository = new DistributionBoardRepository(context.db);
+  const repository = new DistributionBoardFixtureRepository(context.db);
   const board = repository.createWithCircuitListAndDefaultSections(
     "project-1",
     "UV-01"

tests/circuit-section-renumber-project-command.repository.test.ts

@@ -8,7 +8,7 @@ import {
   type DatabaseContext,
 } from "../src/db/database-context.js";
 import { CircuitSectionRenumberProjectCommandRepository } from "../src/db/repositories/circuit-section-renumber-project-command.repository.js";
-import { DistributionBoardRepository } from "../src/db/repositories/distribution-board.repository.js";
+import { DistributionBoardFixtureRepository } from "./support/distribution-board-fixture.js";
 import { ProjectHistoryRepository } from "../src/db/repositories/project-history.repository.js";
 import { circuitDeviceRows } from "../src/db/schema/circuit-device-rows.js";
 import { circuitSections } from "../src/db/schema/circuit-sections.js";
@@ -35,7 +35,7 @@ function createTestDatabase(): TestFixture {
       { id: "project-2", name: "Other project" },
     ])
     .run();
-  const boards = new DistributionBoardRepository(context.db);
+  const boards = new DistributionBoardFixtureRepository(context.db);
   const board = boards.createWithCircuitListAndDefaultSections(
     "project-1",
     "UV-01"

tests/circuit-section-reorder-project-command.repository.test.ts

@@ -8,7 +8,7 @@ import {
   type DatabaseContext,
 } from "../src/db/database-context.js";
 import { CircuitSectionReorderProjectCommandRepository } from "../src/db/repositories/circuit-section-reorder-project-command.repository.js";
-import { DistributionBoardRepository } from "../src/db/repositories/distribution-board.repository.js";
+import { DistributionBoardFixtureRepository } from "./support/distribution-board-fixture.js";
 import { ProjectHistoryRepository } from "../src/db/repositories/project-history.repository.js";
 import { circuitDeviceRows } from "../src/db/schema/circuit-device-rows.js";
 import { circuitSections } from "../src/db/schema/circuit-sections.js";
@@ -37,7 +37,7 @@ function createTestDatabase(): TestFixture {
       { id: "project-2", name: "Other project" },
     ])
     .run();
-  const boards = new DistributionBoardRepository(context.db);
+  const boards = new DistributionBoardFixtureRepository(context.db);
   const board = boards.createWithCircuitListAndDefaultSections(
     "project-1",
     "UV-01"

tests/circuit-structure-project-command.repository.test.ts

@@ -8,7 +8,7 @@ import {
   type DatabaseContext,
 } from "../src/db/database-context.js";
 import { CircuitStructureProjectCommandRepository } from "../src/db/repositories/circuit-structure-project-command.repository.js";
-import { DistributionBoardRepository } from "../src/db/repositories/distribution-board.repository.js";
+import { DistributionBoardFixtureRepository } from "./support/distribution-board-fixture.js";
 import { ProjectHistoryRepository } from "../src/db/repositories/project-history.repository.js";
 import { circuitDeviceRows } from "../src/db/schema/circuit-device-rows.js";
 import { circuitSections } from "../src/db/schema/circuit-sections.js";
@@ -45,7 +45,7 @@ function createTestDatabase(): TestFixture {
     ])
     .run();
 
-  const boards = new DistributionBoardRepository(context.db);
+  const boards = new DistributionBoardFixtureRepository(context.db);
   const board = boards.createWithCircuitListAndDefaultSections(
     "project-1",
     "UV-01"

tests/database-backup.test.ts

@@ -10,6 +10,15 @@ import {
   verifyDatabaseFile,
 } from "../src/db/database-backup.js";
 import { createDatabaseContext } from "../src/db/database-context.js";
+import { CircuitDeviceRowRepository } from "../src/db/repositories/circuit-device-row.repository.js";
+import { CircuitListRepository } from "../src/db/repositories/circuit-list.repository.js";
+import { CircuitSectionRepository } from "../src/db/repositories/circuit-section.repository.js";
+import { CircuitRepository } from "../src/db/repositories/circuit.repository.js";
+import { FloorRepository } from "../src/db/repositories/floor.repository.js";
+import { GlobalDeviceRepository } from "../src/db/repositories/global-device.repository.js";
+import { ProjectDeviceRepository } from "../src/db/repositories/project-device.repository.js";
+import { ProjectRepository } from "../src/db/repositories/project.repository.js";
+import { RoomRepository } from "../src/db/repositories/room.repository.js";
 import { projects } from "../src/db/schema/projects.js";
 
 describe("database backup and restore", () => {
@@ -86,3 +95,71 @@ describe("database backup and restore", () => {
     }
   });
 });
+
+describe("application repository database contexts", () => {
+  it("keep reads and writes inside their injected database", async () => {
+    const first = createDatabaseContext(":memory:");
+    const second = createDatabaseContext(":memory:");
+    try {
+      for (const context of [first, second]) {
+        migrate(context.db, {
+          migrationsFolder: path.resolve("src", "db", "migrations"),
+        });
+      }
+
+      const firstProjects = new ProjectRepository(first.db);
+      const secondProjects = new ProjectRepository(second.db);
+      const project = await firstProjects.create({ name: "Nur in Datenbank A" });
+
+      assert.equal((await firstProjects.list()).length, 1);
+      assert.deepEqual(await secondProjects.list(), []);
+
+      const firstGlobalDevices = new GlobalDeviceRepository(first.db);
+      const secondGlobalDevices = new GlobalDeviceRepository(second.db);
+      await firstGlobalDevices.create({
+        name: "Steckdose",
+        displayName: "Steckdose",
+        quantity: 1,
+        installedPowerPerUnitKw: 0.2,
+        demandFactor: 1,
+      });
+
+      assert.equal((await firstGlobalDevices.list()).length, 1);
+      assert.deepEqual(await secondGlobalDevices.list(), []);
+
+      assert.deepEqual(
+        await new CircuitListRepository(first.db).listByProject(project.id),
+        []
+      );
+      assert.deepEqual(
+        await new CircuitSectionRepository(first.db).listByCircuitList(
+          "unknown-list"
+        ),
+        []
+      );
+      assert.deepEqual(
+        await new CircuitRepository(first.db).listByCircuitList("unknown-list"),
+        []
+      );
+      assert.deepEqual(
+        await new CircuitDeviceRowRepository(first.db).listByCircuitList([]),
+        []
+      );
+      assert.deepEqual(
+        await new FloorRepository(first.db).listByProject(project.id),
+        []
+      );
+      assert.deepEqual(
+        await new RoomRepository(first.db).listByProject(project.id),
+        []
+      );
+      assert.deepEqual(
+        await new ProjectDeviceRepository(first.db).listByProject(project.id),
+        []
+      );
+    } finally {
+      first.close();
+      second.close();
+    }
+  });
+});

tests/distribution-board.repository.test.ts

@@ -1,98 +0,0 @@
-import path from "node:path";
-import assert from "node:assert/strict";
-import { describe, it } from "node:test";
-import { eq } from "drizzle-orm";
-import { migrate } from "drizzle-orm/better-sqlite3/migrator";
-import {
-  createDatabaseContext,
-  type DatabaseContext,
-} from "../src/db/database-context.js";
-import { DistributionBoardRepository } from "../src/db/repositories/distribution-board.repository.js";
-import { circuitLists } from "../src/db/schema/circuit-lists.js";
-import { circuitSections } from "../src/db/schema/circuit-sections.js";
-import { distributionBoards } from "../src/db/schema/distribution-boards.js";
-import { projects } from "../src/db/schema/projects.js";
-
-function createTestDatabase(): DatabaseContext {
-  const context = createDatabaseContext(":memory:");
-  migrate(context.db, {
-    migrationsFolder: path.resolve("src", "db", "migrations"),
-  });
-  context.db.insert(projects).values({ id: "project-1", name: "Test project" }).run();
-  return context;
-}
-
-describe("distribution board repository integration", () => {
-  it("commits board, circuit list and default sections together", () => {
-    const context = createTestDatabase();
-    try {
-      const repository = new DistributionBoardRepository(context.db);
-      const board = repository.createWithCircuitListAndDefaultSections(
-        "project-1",
-        "UV-01"
-      );
-
-      const persistedBoards = context.db
-        .select()
-        .from(distributionBoards)
-        .where(eq(distributionBoards.id, board.id))
-        .all();
-      const persistedLists = context.db
-        .select()
-        .from(circuitLists)
-        .where(eq(circuitLists.distributionBoardId, board.id))
-        .all();
-      const persistedSections = context.db
-        .select()
-        .from(circuitSections)
-        .where(eq(circuitSections.circuitListId, board.id))
-        .all();
-
-      assert.deepEqual(persistedBoards, [board]);
-      assert.equal(persistedLists.length, 1);
-      assert.equal(persistedLists[0].name, "UV-01 Stromkreisliste");
-      assert.deepEqual(
-        persistedSections
-          .sort((left, right) => left.sortOrder - right.sortOrder)
-          .map((section) => [section.key, section.prefix]),
-        [
-          ["lighting", "-1F"],
-          ["single_phase", "-2F"],
-          ["three_phase", "-3F"],
-          ["unassigned", "-UF"],
-        ]
-      );
-    } finally {
-      context.close();
-    }
-  });
-
-  it("rolls back board and circuit list when default section creation fails", () => {
-    const context = createTestDatabase();
-    try {
-      context.sqlite.exec(`
-        CREATE TRIGGER fail_default_section_insert
-        BEFORE INSERT ON circuit_sections
-        BEGIN
-          SELECT RAISE(ABORT, 'forced section failure');
-        END;
-      `);
-      const repository = new DistributionBoardRepository(context.db);
-
-      assert.throws(
-        () =>
-          repository.createWithCircuitListAndDefaultSections(
-            "project-1",
-            "UV rollback"
-          ),
-        /forced section failure/
-      );
-
-      assert.equal(context.db.select().from(distributionBoards).all().length, 0);
-      assert.equal(context.db.select().from(circuitLists).all().length, 0);
-      assert.equal(context.db.select().from(circuitSections).all().length, 0);
-    } finally {
-      context.close();
-    }
-  });
-});

tests/legacy-consumer-migration.repository.test.ts

@@ -7,7 +7,7 @@ import {
   createDatabaseContext,
   type DatabaseContext,
 } from "../src/db/database-context.js";
-import { DistributionBoardRepository } from "../src/db/repositories/distribution-board.repository.js";
+import { DistributionBoardFixtureRepository } from "./support/distribution-board-fixture.js";
 import { LegacyConsumerMigrationRepository } from "../src/db/repositories/legacy-consumer-migration.repository.js";
 import { circuitDeviceRows } from "../src/db/schema/circuit-device-rows.js";
 import { circuitSections } from "../src/db/schema/circuit-sections.js";
@@ -23,7 +23,7 @@ function createTestDatabase() {
     migrationsFolder: path.resolve("src", "db", "migrations"),
   });
   context.db.insert(projects).values({ id: "project-1", name: "Test project" }).run();
-  const board = new DistributionBoardRepository(
+  const board = new DistributionBoardFixtureRepository(
     context.db
   ).createWithCircuitListAndDefaultSections("project-1", "UV-01");
   const [section] = context.db

tests/legacy-consumer-migration.service.test.ts

@@ -0,0 +1,130 @@
+import assert from "node:assert/strict";
+import { describe, it } from "node:test";
+import type {
+  LegacyConsumerMigrationDependencies,
+  LegacyMigrationCircuitInput,
+  LegacyMigrationReportInput,
+} from "../src/domain/ports/legacy-consumer-migration.store.js";
+import { LegacyConsumerMigrationService } from "../src/domain/services/legacy-consumer-migration.service.js";
+
+describe("legacy consumer migration service", () => {
+  it("plans the migration through injected readers and persists one complete batch", async () => {
+    let defaultsCreatedFor: string | null = null;
+    let persisted:
+      | {
+          circuitListId: string;
+          circuits: LegacyMigrationCircuitInput[];
+          report: LegacyMigrationReportInput;
+        }
+      | undefined;
+    const dependencies: LegacyConsumerMigrationDependencies = {
+      circuitListReader: {
+        async findById(projectId, circuitListId) {
+          assert.equal(projectId, "project-1");
+          assert.equal(circuitListId, "list-1");
+          return { id: circuitListId };
+        },
+      },
+      sectionStore: {
+        async createDefaults(circuitListId) {
+          defaultsCreatedFor = circuitListId;
+        },
+        async listByCircuitList() {
+          return [
+            { id: "section-1", key: "single_phase", prefix: "-2F" },
+            { id: "section-2", key: "unassigned", prefix: "-XF" },
+          ];
+        },
+      },
+      circuitReader: {
+        async listByCircuitList() {
+          return [
+            {
+              sectionId: "section-1",
+              equipmentIdentifier: "-2F2",
+              sortOrder: 10,
+            },
+          ];
+        },
+      },
+      roomReader: {
+        async listByProject() {
+          return [
+            { id: "room-1", roomNumber: "1.01", roomName: "Besprechung" },
+          ];
+        },
+      },
+      migrationStore: {
+        async listSourceConsumersByCircuitList() {
+          return [
+            {
+              id: "consumer-1",
+              projectDeviceId: null,
+              roomId: "room-1",
+              circuitNumber: null,
+              description: "Steckdosen Besprechung",
+              name: "Steckdose",
+              category: null,
+              deviceType: null,
+              phaseType: null,
+              tradeOrCostGroup: "KG 440",
+              protectionType: null,
+              protectionRatedCurrent: null,
+              protectionCharacteristic: null,
+              cableType: null,
+              cableCrossSection: null,
+              comment: null,
+              quantity: 2,
+              installedPowerPerUnitKw: 0.2,
+              demandFactor: 0.8,
+              voltageV: 230,
+              phaseCount: 1,
+              powerFactor: 0.95,
+              note: "Bestand",
+            },
+          ];
+        },
+        async listMigratedConsumerIds() {
+          return [];
+        },
+        persistCircuitListMigration(input) {
+          persisted = input;
+        },
+      },
+    };
+
+    const report = await new LegacyConsumerMigrationService(
+      dependencies
+    ).migrateCircuitList("project-1", "list-1");
+
+    assert.equal(defaultsCreatedFor, "list-1");
+    assert.deepEqual(report.generatedIdentifiers, ["-2F3"]);
+    assert.equal(report.createdCircuitCount, 1);
+    assert.equal(report.createdDeviceRowCount, 1);
+    assert.equal(persisted?.circuitListId, "list-1");
+    assert.equal(persisted?.circuits[0].circuit.sectionId, "section-1");
+    assert.equal(
+      persisted?.circuits[0].circuit.equipmentIdentifier,
+      "-2F3"
+    );
+    assert.deepEqual(persisted?.circuits[0].deviceRows[0], {
+      linkedProjectDeviceId: undefined,
+      legacyConsumerId: "consumer-1",
+      sortOrder: 10,
+      name: "Steckdose",
+      displayName: "Steckdosen Besprechung",
+      phaseType: undefined,
+      connectionKind: undefined,
+      costGroup: "KG 440",
+      category: undefined,
+      roomId: "room-1",
+      roomNumberSnapshot: "1.01",
+      roomNameSnapshot: "Besprechung",
+      quantity: 2,
+      powerPerUnit: 0.2,
+      simultaneityFactor: 0.8,
+      cosPhi: 0.95,
+      remark: "Bestand",
+    });
+  });
+});

tests/project-command.service.test.ts

@@ -14,9 +14,10 @@ import { CircuitProjectCommandRepository } from "../src/db/repositories/circuit-
 import { CircuitSectionReorderProjectCommandRepository } from "../src/db/repositories/circuit-section-reorder-project-command.repository.js";
 import { CircuitSectionRenumberProjectCommandRepository } from "../src/db/repositories/circuit-section-renumber-project-command.repository.js";
 import { CircuitStructureProjectCommandRepository } from "../src/db/repositories/circuit-structure-project-command.repository.js";
-import { DistributionBoardRepository } from "../src/db/repositories/distribution-board.repository.js";
+import { DistributionBoardFixtureRepository } from "./support/distribution-board-fixture.js";
 import { DistributionBoardStructureProjectCommandRepository } from "../src/db/repositories/distribution-board-structure-project-command.repository.js";
 import { ProjectHistoryRepository } from "../src/db/repositories/project-history.repository.js";
+import { ProjectLocationStructureProjectCommandRepository } from "../src/db/repositories/project-location-structure-project-command.repository.js";
 import { ProjectDeviceProjectCommandRepository } from "../src/db/repositories/project-device-project-command.repository.js";
 import { ProjectDeviceRowSyncProjectCommandRepository } from "../src/db/repositories/project-device-row-sync-project-command.repository.js";
 import { ProjectDeviceStructureProjectCommandRepository } from "../src/db/repositories/project-device-structure-project-command.repository.js";
@@ -29,6 +30,8 @@ import { projectChangeSets } from "../src/db/schema/project-change-sets.js";
 import { projectDevices } from "../src/db/schema/project-devices.js";
 import { projectRevisions } from "../src/db/schema/project-revisions.js";
 import { projects } from "../src/db/schema/projects.js";
+import { floors } from "../src/db/schema/floors.js";
+import { rooms } from "../src/db/schema/rooms.js";
 import { ProjectHistoryOperationUnavailableError } from "../src/domain/errors/project-history-operation-unavailable.error.js";
 import { ProjectRevisionConflictError } from "../src/domain/errors/project-revision-conflict.error.js";
 import { createCircuitDeviceRowUpdateProjectCommand } from "../src/domain/models/circuit-device-row-project-command.model.js";
@@ -46,6 +49,12 @@ import {
   createDistributionBoardInsertProjectCommand,
   createDistributionBoardStructureSnapshot,
 } from "../src/domain/models/distribution-board-structure-project-command.model.js";
+import {
+  createProjectFloorInsertProjectCommand,
+  createProjectFloorSnapshot,
+  createProjectRoomInsertProjectCommand,
+  createProjectRoomSnapshot,
+} from "../src/domain/models/project-location-structure-project-command.model.js";
 import { createProjectDeviceRowSyncProjectCommand } from "../src/domain/models/project-device-row-sync-project-command.model.js";
 import { createProjectDeviceUpdateProjectCommand } from "../src/domain/models/project-device-project-command.model.js";
 import { createProjectDeviceInsertProjectCommand } from "../src/domain/models/project-device-structure-project-command.model.js";
@@ -61,7 +70,7 @@ function createTestDatabase(): DatabaseContext {
     .insert(projects)
     .values({ id: "project-1", name: "Test project" })
     .run();
-  const board = new DistributionBoardRepository(
+  const board = new DistributionBoardFixtureRepository(
     context.db
   ).createWithCircuitListAndDefaultSections("project-1", "UV-01");
   const section = context.db
@@ -105,6 +114,7 @@ function createService(context: DatabaseContext) {
     new CircuitDeviceRowMoveProjectCommandRepository(context.db),
     new CircuitStructureProjectCommandRepository(context.db),
     new DistributionBoardStructureProjectCommandRepository(context.db),
+    new ProjectLocationStructureProjectCommandRepository(context.db),
     new CircuitSectionReorderProjectCommandRepository(context.db),
     new CircuitSectionRenumberProjectCommandRepository(context.db),
     new ProjectDeviceStructureProjectCommandRepository(context.db),
@@ -1036,6 +1046,68 @@ describe("project command service", () => {
     }
   });
 
+  it("dispatches floor and room setup with their persisted inverses", () => {
+    const context = createTestDatabase();
+    try {
+      const service = createService(context);
+      const floor = createProjectFloorSnapshot(
+        "project-1",
+        "EG",
+        0
+      );
+      service.executeUser({
+        projectId: "project-1",
+        expectedRevision: 0,
+        command: createProjectFloorInsertProjectCommand(floor),
+      });
+      const room = createProjectRoomSnapshot("project-1", {
+        floorId: floor.id,
+        roomNumber: "001",
+        roomName: "Technik",
+      });
+      const created = service.executeUser({
+        projectId: "project-1",
+        expectedRevision: 1,
+        command: createProjectRoomInsertProjectCommand(room),
+      });
+      assert.equal(created.history.currentRevision, 2);
+      assert.ok(
+        context.db
+          .select()
+          .from(rooms)
+          .where(eq(rooms.id, room.id))
+          .get()
+      );
+
+      createService(context).undo({
+        projectId: "project-1",
+        expectedRevision: 2,
+      });
+      assert.equal(
+        context.db
+          .select()
+          .from(rooms)
+          .where(eq(rooms.id, room.id))
+          .get(),
+        undefined
+      );
+      createService(context).undo({
+        projectId: "project-1",
+        expectedRevision: 3,
+      });
+      assert.equal(
+        context.db
+          .select()
+          .from(floors)
+          .where(eq(floors.id, floor.id))
+          .get(),
+        undefined
+      );
+    } finally {
+      context.close();
+    }
+  });
+
   it("rejects unsupported and malformed commands before domain writes", () => {
     const context = createTestDatabase();
     try {

tests/project-device-row-sync-project-command.repository.test.ts

@@ -7,7 +7,7 @@ import {
   createDatabaseContext,
   type DatabaseContext,
 } from "../src/db/database-context.js";
-import { DistributionBoardRepository } from "../src/db/repositories/distribution-board.repository.js";
+import { DistributionBoardFixtureRepository } from "./support/distribution-board-fixture.js";
 import { ProjectDeviceRowSyncProjectCommandRepository } from "../src/db/repositories/project-device-row-sync-project-command.repository.js";
 import { ProjectHistoryRepository } from "../src/db/repositories/project-history.repository.js";
 import { circuitDeviceRows } from "../src/db/schema/circuit-device-rows.js";
@@ -37,7 +37,7 @@ function createTestDatabase(): TestFixture {
       { id: "project-2", name: "Other project" },
     ])
     .run();
-  const boards = new DistributionBoardRepository(context.db);
+  const boards = new DistributionBoardFixtureRepository(context.db);
   const board = boards.createWithCircuitListAndDefaultSections(
     "project-1",
     "UV-01"

tests/project-device-structure-project-command.repository.test.ts

@@ -7,7 +7,7 @@ import {
   createDatabaseContext,
   type DatabaseContext,
 } from "../src/db/database-context.js";
-import { DistributionBoardRepository } from "../src/db/repositories/distribution-board.repository.js";
+import { DistributionBoardFixtureRepository } from "./support/distribution-board-fixture.js";
 import { ProjectDeviceStructureProjectCommandRepository } from "../src/db/repositories/project-device-structure-project-command.repository.js";
 import { ProjectHistoryRepository } from "../src/db/repositories/project-history.repository.js";
 import { circuitDeviceRows } from "../src/db/schema/circuit-device-rows.js";
@@ -53,7 +53,7 @@ function createTestDatabase(): DatabaseContext {
       { id: "project-2", name: "Other project" },
     ])
     .run();
-  const boards = new DistributionBoardRepository(context.db);
+  const boards = new DistributionBoardFixtureRepository(context.db);
   const board = boards.createWithCircuitListAndDefaultSections(
     "project-1",
     "UV-01"

tests/project-device-sync.service.test.ts

@@ -59,12 +59,12 @@ function createService() {
   const service = new ProjectDeviceSyncService({
     projectDeviceRepository: {
       async findById() {
-        return projectDevice() as never;
+        return projectDevice();
       },
     },
     deviceRowRepository: {
       async listLinkedByProjectDevice() {
-        return rows as never;
+        return rows;
       },
     },
   });

tests/project-history.repository.test.ts

@@ -9,7 +9,7 @@ import {
 } from "../src/db/database-context.js";
 import { CircuitDeviceRowProjectCommandRepository } from "../src/db/repositories/circuit-device-row-project-command.repository.js";
 import { CircuitProjectCommandRepository } from "../src/db/repositories/circuit-project-command.repository.js";
-import { DistributionBoardRepository } from "../src/db/repositories/distribution-board.repository.js";
+import { DistributionBoardFixtureRepository } from "./support/distribution-board-fixture.js";
 import { ProjectHistoryRepository } from "../src/db/repositories/project-history.repository.js";
 import { circuitDeviceRows } from "../src/db/schema/circuit-device-rows.js";
 import { circuitSections } from "../src/db/schema/circuit-sections.js";
@@ -30,7 +30,7 @@ function createTestDatabase(): DatabaseContext {
     .insert(projects)
     .values({ id: "project-1", name: "Test project" })
     .run();
-  const board = new DistributionBoardRepository(
+  const board = new DistributionBoardFixtureRepository(
     context.db
   ).createWithCircuitListAndDefaultSections("project-1", "UV-01");
   const section = context.db

tests/project-location-structure-project-command.repository.test.ts

@@ -0,0 +1,464 @@
+import path from "node:path";
+import assert from "node:assert/strict";
+import { describe, it } from "node:test";
+import { eq } from "drizzle-orm";
+import { migrate } from "drizzle-orm/better-sqlite3/migrator";
+import {
+  createDatabaseContext,
+  type DatabaseContext,
+} from "../src/db/database-context.js";
+import { ProjectHistoryRepository } from "../src/db/repositories/project-history.repository.js";
+import { ProjectLocationStructureProjectCommandRepository } from "../src/db/repositories/project-location-structure-project-command.repository.js";
+import { consumers } from "../src/db/schema/consumers.js";
+import { floors } from "../src/db/schema/floors.js";
+import { projectRevisions } from "../src/db/schema/project-revisions.js";
+import { projects } from "../src/db/schema/projects.js";
+import { rooms } from "../src/db/schema/rooms.js";
+import { ProjectRevisionConflictError } from "../src/domain/errors/project-revision-conflict.error.js";
+import {
+  createProjectFloorInsertProjectCommand,
+  createProjectFloorSnapshot,
+  createProjectRoomInsertProjectCommand,
+  createProjectRoomSnapshot,
+} from "../src/domain/models/project-location-structure-project-command.model.js";
+import { createFloor, createRoom } from "../src/frontend/utils/api.js";
+import {
+  createFloorSchema,
+  createRoomSchema,
+} from "../src/shared/validation/project-structure.schemas.js";
+
+function createTestDatabase(): DatabaseContext {
+  const context = createDatabaseContext(":memory:");
+  migrate(context.db, {
+    migrationsFolder: path.resolve("src", "db", "migrations"),
+  });
+  context.db
+    .insert(projects)
+    .values([
+      { id: "project-1", name: "Test project" },
+      { id: "project-2", name: "Foreign project" },
+    ])
+    .run();
+  return context;
+}
+
+function getCounts(context: DatabaseContext) {
+  return {
+    floors: context.db.select().from(floors).all().length,
+    rooms: context.db.select().from(rooms).all().length,
+    revisions: context.db.select().from(projectRevisions).all().length,
+  };
+}
+
+describe("project-location structure project command", () => {
+  it("normalizes snapshots and sends optimistic frontend revisions", async () => {
+    const floor = createProjectFloorSnapshot("project-1", " EG ", 0);
+    const room = createProjectRoomSnapshot("project-1", {
+      floorId: floor.id,
+      roomNumber: " 001 ",
+      roomName: " Technik ",
+    });
+    assert.equal(floor.name, "EG");
+    assert.equal(room.roomNumber, "001");
+    assert.equal(room.roomName, "Technik");
+    assert.throws(
+      () =>
+        createProjectFloorInsertProjectCommand({
+          ...floor,
+          name: " EG ",
+        }),
+      /normalized/
+    );
+    assert.equal(
+      createFloorSchema.safeParse({ name: "EG" }).success,
+      false
+    );
+    assert.equal(
+      createRoomSchema.safeParse({
+        expectedRevision: 0,
+        roomNumber: "001",
+        roomName: "Technik",
+        unknown: true,
+      }).success,
+      false
+    );
+
+    const requests: Array<{ url: string; body: unknown }> = [];
+    const originalFetch = globalThis.fetch;
+    globalThis.fetch = async (input, init) => {
+      requests.push({
+        url: String(input),
+        body: JSON.parse(String(init?.body)),
+      });
+      return new Response(JSON.stringify({}), {
+        status: 200,
+        headers: { "Content-Type": "application/json" },
+      });
+    };
+    try {
+      await createFloor("project-1", { name: "EG" }, 7);
+      await createRoom(
+        "project-1",
+        {
+          floorId: "floor-1",
+          roomNumber: "001",
+          roomName: "Technik",
+        },
+        8
+      );
+    } finally {
+      globalThis.fetch = originalFetch;
+    }
+    assert.deepEqual(requests, [
+      {
+        url: "/api/projects/project-1/floors",
+        body: { name: "EG", expectedRevision: 7 },
+      },
+      {
+        url: "/api/projects/project-1/rooms",
+        body: {
+          floorId: "floor-1",
+          roomNumber: "001",
+          roomName: "Technik",
+          expectedRevision: 8,
+        },
+      },
+    ]);
+  });
+
+  it("creates a stable floor and supports persisted undo and redo", () => {
+    const context = createTestDatabase();
+    try {
+      const repository =
+        new ProjectLocationStructureProjectCommandRepository(context.db);
+      const history = new ProjectHistoryRepository(context.db);
+      const floor = createProjectFloorSnapshot("project-1", "EG", 0);
+      const command = createProjectFloorInsertProjectCommand(floor);
+      const inserted = repository.execute({
+        projectId: "project-1",
+        expectedRevision: 0,
+        source: "user",
+        command,
+      });
+      assert.deepEqual(getCounts(context), {
+        floors: 1,
+        rooms: 0,
+        revisions: 1,
+      });
+
+      const undoStep = history.getNextCommand("project-1", "undo");
+      assert.ok(undoStep);
+      repository.execute({
+        projectId: "project-1",
+        expectedRevision: 1,
+        source: "undo",
+        historyTargetChangeSetId: undoStep.changeSetId,
+        command: inserted.inverse,
+      });
+      assert.deepEqual(getCounts(context), {
+        floors: 0,
+        rooms: 0,
+        revisions: 2,
+      });
+
+      const redoStep = history.getNextCommand("project-1", "redo");
+      assert.ok(redoStep);
+      repository.execute({
+        projectId: "project-1",
+        expectedRevision: 2,
+        source: "redo",
+        historyTargetChangeSetId: redoStep.changeSetId,
+        command,
+      });
+      assert.deepEqual(
+        context.db
+          .select()
+          .from(floors)
+          .where(eq(floors.id, floor.id))
+          .get(),
+        floor
+      );
+    } finally {
+      context.close();
+    }
+  });
+
+  it("creates a stable room and supports persisted undo and redo", () => {
+    const context = createTestDatabase();
+    try {
+      context.db
+        .insert(floors)
+        .values({
+          id: "floor-1",
+          projectId: "project-1",
+          name: "EG",
+          sortOrder: 0,
+        })
+        .run();
+      const repository =
+        new ProjectLocationStructureProjectCommandRepository(context.db);
+      const history = new ProjectHistoryRepository(context.db);
+      const room = createProjectRoomSnapshot("project-1", {
+        floorId: "floor-1",
+        roomNumber: "001",
+        roomName: "Technik",
+      });
+      const command = createProjectRoomInsertProjectCommand(room);
+      const inserted = repository.execute({
+        projectId: "project-1",
+        expectedRevision: 0,
+        source: "user",
+        command,
+      });
+      const undoStep = history.getNextCommand("project-1", "undo");
+      assert.ok(undoStep);
+      repository.execute({
+        projectId: "project-1",
+        expectedRevision: 1,
+        source: "undo",
+        historyTargetChangeSetId: undoStep.changeSetId,
+        command: inserted.inverse,
+      });
+      assert.equal(
+        context.db
+          .select()
+          .from(rooms)
+          .where(eq(rooms.id, room.id))
+          .get(),
+        undefined
+      );
+
+      const redoStep = history.getNextCommand("project-1", "redo");
+      assert.ok(redoStep);
+      repository.execute({
+        projectId: "project-1",
+        expectedRevision: 2,
+        source: "redo",
+        historyTargetChangeSetId: redoStep.changeSetId,
+        command,
+      });
+      assert.deepEqual(
+        context.db
+          .select()
+          .from(rooms)
+          .where(eq(rooms.id, room.id))
+          .get(),
+        room
+      );
+    } finally {
+      context.close();
+    }
+  });
+
+  it("rejects foreign, stale and changed locations without partial writes", () => {
+    const context = createTestDatabase();
+    try {
+      context.db
+        .insert(floors)
+        .values({
+          id: "foreign-floor",
+          projectId: "project-2",
+          name: "Fremd",
+          sortOrder: 0,
+        })
+        .run();
+      const repository =
+        new ProjectLocationStructureProjectCommandRepository(context.db);
+      assert.throws(
+        () =>
+          repository.execute({
+            projectId: "project-1",
+            expectedRevision: 0,
+            source: "user",
+            command: createProjectRoomInsertProjectCommand(
+              createProjectRoomSnapshot("project-1", {
+                floorId: "foreign-floor",
+                roomNumber: "001",
+                roomName: "Fremdraum",
+              })
+            ),
+          }),
+        /foreign floor/
+      );
+      const floor = createProjectFloorSnapshot("project-1", "EG", 0);
+      const command = createProjectFloorInsertProjectCommand(floor);
+      assert.throws(
+        () =>
+          repository.execute({
+            projectId: "project-1",
+            expectedRevision: 1,
+            source: "user",
+            command,
+          }),
+        ProjectRevisionConflictError
+      );
+      assert.deepEqual(getCounts(context), {
+        floors: 1,
+        rooms: 0,
+        revisions: 0,
+      });
+
+      const inserted = repository.execute({
+        projectId: "project-1",
+        expectedRevision: 0,
+        source: "user",
+        command,
+      });
+      context.db
+        .update(floors)
+        .set({ name: "Direkt geändert" })
+        .where(eq(floors.id, floor.id))
+        .run();
+      const undoStep = new ProjectHistoryRepository(
+        context.db
+      ).getNextCommand("project-1", "undo");
+      assert.ok(undoStep);
+      assert.throws(
+        () =>
+          repository.execute({
+            projectId: "project-1",
+            expectedRevision: 1,
+            source: "undo",
+            historyTargetChangeSetId: undoStep.changeSetId,
+            command: inserted.inverse,
+          }),
+        /changed before deletion/
+      );
+      assert.equal(
+        context.db.select().from(projectRevisions).all().length,
+        1
+      );
+    } finally {
+      context.close();
+    }
+  });
+
+  it("refuses referenced deletes and rolls back late history failures", () => {
+    const floorContext = createTestDatabase();
+    try {
+      const repository =
+        new ProjectLocationStructureProjectCommandRepository(
+          floorContext.db
+        );
+      const floor = createProjectFloorSnapshot("project-1", "EG", 0);
+      const inserted = repository.execute({
+        projectId: "project-1",
+        expectedRevision: 0,
+        source: "user",
+        command: createProjectFloorInsertProjectCommand(floor),
+      });
+      floorContext.db
+        .insert(rooms)
+        .values({
+          id: "room-1",
+          projectId: "project-1",
+          floorId: floor.id,
+          roomNumber: "001",
+          roomName: "Technik",
+        })
+        .run();
+      const undoStep = new ProjectHistoryRepository(
+        floorContext.db
+      ).getNextCommand("project-1", "undo");
+      assert.ok(undoStep);
+      assert.throws(
+        () =>
+          repository.execute({
+            projectId: "project-1",
+            expectedRevision: 1,
+            source: "undo",
+            historyTargetChangeSetId: undoStep.changeSetId,
+            command: inserted.inverse,
+          }),
+        /assigned rooms/
+      );
+    } finally {
+      floorContext.close();
+    }
+
+    const roomContext = createTestDatabase();
+    try {
+      const repository =
+        new ProjectLocationStructureProjectCommandRepository(
+          roomContext.db
+        );
+      const room = createProjectRoomSnapshot("project-1", {
+        roomNumber: "001",
+        roomName: "Technik",
+      });
+      const inserted = repository.execute({
+        projectId: "project-1",
+        expectedRevision: 0,
+        source: "user",
+        command: createProjectRoomInsertProjectCommand(room),
+      });
+      roomContext.db
+        .insert(consumers)
+        .values({
+          id: "legacy-consumer-1",
+          projectId: "project-1",
+          roomId: room.id,
+          name: "Bestand",
+          quantity: 1,
+          installedPowerPerUnitKw: 1,
+          demandFactor: 1,
+        })
+        .run();
+      const undoStep = new ProjectHistoryRepository(
+        roomContext.db
+      ).getNextCommand("project-1", "undo");
+      assert.ok(undoStep);
+      assert.throws(
+        () =>
+          repository.execute({
+            projectId: "project-1",
+            expectedRevision: 1,
+            source: "undo",
+            historyTargetChangeSetId: undoStep.changeSetId,
+            command: inserted.inverse,
+          }),
+        /referenced project room/
+      );
+    } finally {
+      roomContext.close();
+    }
+
+    const rollbackContext = createTestDatabase();
+    try {
+      rollbackContext.sqlite.exec(`
+        CREATE TRIGGER fail_project_location_history
+        BEFORE INSERT ON project_history_stack_entries
+        BEGIN
+          SELECT RAISE(ABORT, 'forced project-location history failure');
+        END;
+      `);
+      const repository =
+        new ProjectLocationStructureProjectCommandRepository(
+          rollbackContext.db
+        );
+      assert.throws(
+        () =>
+          repository.execute({
+            projectId: "project-1",
+            expectedRevision: 0,
+            source: "user",
+            command: createProjectFloorInsertProjectCommand(
+              createProjectFloorSnapshot(
+                "project-1",
+                "Rollback",
+                0
+              )
+            ),
+          }),
+        /forced project-location history failure/
+      );
+      assert.deepEqual(getCounts(rollbackContext), {
+        floors: 0,
+        rooms: 0,
+        revisions: 0,
+      });
+    } finally {
+      rollbackContext.close();
+    }
+  });
+});

tests/project-revision.persistence.test.ts

@@ -5,12 +5,11 @@ import { eq } from "drizzle-orm";
 import { migrate } from "drizzle-orm/better-sqlite3/migrator";
 import {
   createDatabaseContext,
+  type AppDatabase,
   type DatabaseContext,
 } from "../src/db/database-context.js";
-import {
+import { ProjectRevisionConflictError } from "../src/domain/errors/project-revision-conflict.error.js";
-  ProjectRevisionConflictError,
+import { appendProjectRevision } from "../src/db/repositories/project-revision.persistence.js";
-  ProjectRevisionRepository,
-} from "../src/db/repositories/project-revision.repository.js";
 import { ProjectSnapshotRepository } from "../src/db/repositories/project-snapshot.repository.js";
 import { projectChangeSets } from "../src/db/schema/project-change-sets.js";
 import { projectRevisions } from "../src/db/schema/project-revisions.js";
@@ -27,10 +26,11 @@ function createTestDatabase(): DatabaseContext {
 }
 
 function appendTestRevision(
-  repository: ProjectRevisionRepository,
+  database: AppDatabase,
   expectedRevision: number
 ) {
-  return repository.append({
+  return database.transaction((tx) =>
+    appendProjectRevision(tx, {
       projectId: "project-1",
       expectedRevision,
       source: "user",
@@ -46,21 +46,30 @@ function appendTestRevision(
         type: "circuit.update",
         payload: { circuitId: "circuit-1", displayName: "Alt" },
       },
-  });
+    })
+  );
 }
 
-describe("project revision repository", () => {
+function getCurrentRevision(database: AppDatabase, projectId: string) {
+  return (
+    database
+      .select({ currentRevision: projects.currentRevision })
+      .from(projects)
+      .where(eq(projects.id, projectId))
+      .get()?.currentRevision ?? null
+  );
+}
+
+describe("project revision persistence", () => {
   it("appends immutable revision metadata and payloads with a monotonic number", () => {
     const context = createTestDatabase();
     try {
-      const repository = new ProjectRevisionRepository(context.db);
+      assert.equal(getCurrentRevision(context.db, "project-1"), 0);
-
+      const appended = appendTestRevision(context.db, 0);
-      assert.equal(repository.getCurrentRevision("project-1"), 0);
-      const appended = appendTestRevision(repository, 0);
 
       assert.equal(appended.projectId, "project-1");
       assert.equal(appended.revisionNumber, 1);
-      assert.equal(repository.getCurrentRevision("project-1"), 1);
+      assert.equal(getCurrentRevision(context.db, "project-1"), 1);
 
       const revision = context.db
         .select()
@@ -105,9 +114,9 @@ describe("project revision repository", () => {
         }),
       });
 
-      const next = appendTestRevision(repository, 1);
+      const next = appendTestRevision(context.db, 1);
       assert.equal(next.revisionNumber, 2);
-      assert.equal(repository.getCurrentRevision("project-1"), 2);
+      assert.equal(getCurrentRevision(context.db, "project-1"), 2);
     } finally {
       context.close();
     }
@@ -116,18 +125,17 @@ describe("project revision repository", () => {
   it("rejects a stale expected revision without writing history", () => {
     const context = createTestDatabase();
     try {
-      const repository = new ProjectRevisionRepository(context.db);
+      appendTestRevision(context.db, 0);
-      appendTestRevision(repository, 0);
 
       assert.throws(
-        () => appendTestRevision(repository, 0),
+        () => appendTestRevision(context.db, 0),
         (error) =>
           error instanceof ProjectRevisionConflictError &&
           error.expectedRevision === 0 &&
           error.actualRevision === 1
       );
 
-      assert.equal(repository.getCurrentRevision("project-1"), 1);
+      assert.equal(getCurrentRevision(context.db, "project-1"), 1);
       assert.equal(context.db.select().from(projectRevisions).all().length, 1);
       assert.equal(context.db.select().from(projectChangeSets).all().length, 1);
     } finally {
@@ -145,14 +153,12 @@ describe("project revision repository", () => {
           SELECT RAISE(ABORT, 'forced change-set failure');
         END;
       `);
-      const repository = new ProjectRevisionRepository(context.db);
-
       assert.throws(
-        () => appendTestRevision(repository, 0),
+        () => appendTestRevision(context.db, 0),
         /forced change-set failure/
       );
 
-      assert.equal(repository.getCurrentRevision("project-1"), 0);
+      assert.equal(getCurrentRevision(context.db, "project-1"), 0);
       assert.equal(context.db.select().from(projectRevisions).all().length, 0);
       assert.equal(context.db.select().from(projectChangeSets).all().length, 0);
     } finally {
@@ -163,7 +169,6 @@ describe("project revision repository", () => {
   it("captures and retains automatic snapshots without deleting named snapshots", () => {
     const context = createTestDatabase();
     try {
-      const revisions = new ProjectRevisionRepository(context.db);
       const snapshots = new ProjectSnapshotRepository(context.db);
       const named = snapshots.createNamed({
         projectId: "project-1",
@@ -177,7 +182,7 @@ describe("project revision repository", () => {
         expectedRevision < 325;
         expectedRevision += 1
       ) {
-        appendTestRevision(revisions, expectedRevision);
+        appendTestRevision(context.db, expectedRevision);
       }
 
       const stored = context.db
@@ -234,13 +239,12 @@ describe("project revision repository", () => {
   it("rolls back revision 25 when automatic snapshot persistence fails", () => {
     const context = createTestDatabase();
     try {
-      const repository = new ProjectRevisionRepository(context.db);
       for (
         let expectedRevision = 0;
         expectedRevision < 24;
         expectedRevision += 1
       ) {
-        appendTestRevision(repository, expectedRevision);
+        appendTestRevision(context.db, expectedRevision);
       }
       context.sqlite.exec(`
         CREATE TRIGGER fail_automatic_project_snapshot
@@ -252,10 +256,10 @@ describe("project revision repository", () => {
       `);
 
       assert.throws(
-        () => appendTestRevision(repository, 24),
+        () => appendTestRevision(context.db, 24),
         /forced automatic snapshot failure/
       );
-      assert.equal(repository.getCurrentRevision("project-1"), 24);
+      assert.equal(getCurrentRevision(context.db, "project-1"), 24);
       assert.equal(
         context.db.select().from(projectRevisions).all().length,
         24

tests/project-snapshot.repository.test.ts

@@ -8,7 +8,7 @@ import {
   createDatabaseContext,
   type DatabaseContext,
 } from "../src/db/database-context.js";
-import { DistributionBoardRepository } from "../src/db/repositories/distribution-board.repository.js";
+import { DistributionBoardFixtureRepository } from "./support/distribution-board-fixture.js";
 import { ProjectSnapshotRepository } from "../src/db/repositories/project-snapshot.repository.js";
 import { circuitDeviceRows } from "../src/db/schema/circuit-device-rows.js";
 import { circuitLists } from "../src/db/schema/circuit-lists.js";
@@ -37,7 +37,7 @@ function createTestDatabase(): DatabaseContext {
       threePhaseVoltageV: 400,
     })
     .run();
-  const board = new DistributionBoardRepository(
+  const board = new DistributionBoardFixtureRepository(
     context.db
   ).createWithCircuitListAndDefaultSections("project-1", "UV-01");
   const list = context.db

tests/project-state-restore-command.repository.test.ts

@@ -14,12 +14,13 @@ import { CircuitProjectCommandRepository } from "../src/db/repositories/circuit-
 import { CircuitSectionRenumberProjectCommandRepository } from "../src/db/repositories/circuit-section-renumber-project-command.repository.js";
 import { CircuitSectionReorderProjectCommandRepository } from "../src/db/repositories/circuit-section-reorder-project-command.repository.js";
 import { CircuitStructureProjectCommandRepository } from "../src/db/repositories/circuit-structure-project-command.repository.js";
-import { DistributionBoardRepository } from "../src/db/repositories/distribution-board.repository.js";
+import { DistributionBoardFixtureRepository } from "./support/distribution-board-fixture.js";
 import { DistributionBoardStructureProjectCommandRepository } from "../src/db/repositories/distribution-board-structure-project-command.repository.js";
 import { ProjectDeviceProjectCommandRepository } from "../src/db/repositories/project-device-project-command.repository.js";
 import { ProjectDeviceRowSyncProjectCommandRepository } from "../src/db/repositories/project-device-row-sync-project-command.repository.js";
 import { ProjectDeviceStructureProjectCommandRepository } from "../src/db/repositories/project-device-structure-project-command.repository.js";
 import { ProjectHistoryRepository } from "../src/db/repositories/project-history.repository.js";
+import { ProjectLocationStructureProjectCommandRepository } from "../src/db/repositories/project-location-structure-project-command.repository.js";
 import { ProjectSnapshotRepository } from "../src/db/repositories/project-snapshot.repository.js";
 import { ProjectStateRestoreCommandRepository } from "../src/db/repositories/project-state-restore-command.repository.js";
 import { ProjectSettingsProjectCommandRepository } from "../src/db/repositories/project-settings-project-command.repository.js";
@@ -49,7 +50,7 @@ function createTestDatabase(): DatabaseContext {
     .insert(projects)
     .values({ id: "project-1", name: "Ausgangsprojekt" })
     .run();
-  const board = new DistributionBoardRepository(
+  const board = new DistributionBoardFixtureRepository(
     context.db
   ).createWithCircuitListAndDefaultSections("project-1", "UV-01");
   const list = context.db
@@ -134,6 +135,7 @@ function createService(context: DatabaseContext) {
     new CircuitDeviceRowMoveProjectCommandRepository(context.db),
     new CircuitStructureProjectCommandRepository(context.db),
     new DistributionBoardStructureProjectCommandRepository(context.db),
+    new ProjectLocationStructureProjectCommandRepository(context.db),
     new CircuitSectionReorderProjectCommandRepository(context.db),
     new CircuitSectionRenumberProjectCommandRepository(context.db),
     new ProjectDeviceStructureProjectCommandRepository(context.db),
@@ -192,7 +194,7 @@ function changeCompleteProjectState(context: DatabaseContext) {
       simultaneityFactor: 1,
     })
     .run();
-  new DistributionBoardRepository(
+  new DistributionBoardFixtureRepository(
     context.db
   ).createWithCircuitListAndDefaultSections("project-1", "UV-02");
 }

tests/support/distribution-board-fixture.ts

@@ -0,0 +1,27 @@
+import type { AppDatabase } from "../../src/db/database-context.js";
+import { circuitLists } from "../../src/db/schema/circuit-lists.js";
+import { circuitSections } from "../../src/db/schema/circuit-sections.js";
+import { distributionBoards } from "../../src/db/schema/distribution-boards.js";
+import { createDistributionBoardStructureSnapshot } from "../../src/domain/models/distribution-board-structure-project-command.model.js";
+
+export class DistributionBoardFixtureRepository {
+  constructor(private readonly database: AppDatabase) {}
+
+  createWithCircuitListAndDefaultSections(
+    projectId: string,
+    name: string
+  ) {
+    const structure = createDistributionBoardStructureSnapshot(
+      projectId,
+      name
+    );
+    this.database.transaction((tx) => {
+      tx.insert(distributionBoards)
+        .values(structure.distributionBoard)
+        .run();
+      tx.insert(circuitLists).values(structure.circuitList).run();
+      tx.insert(circuitSections).values(structure.sections).run();
+    });
+    return structure.distributionBoard;
+  }
+}

tsconfig.scripts.json

@@ -0,0 +1,9 @@
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "noEmit": true,
+    "rootDir": "."
+  },
+  "include": ["scripts/**/*.ts", "src/**/*.ts"],
+  "exclude": ["node_modules", "dist"]
+}