update CLAUDE.md to reflect the sync/vector package layout

Documents the homebox/, sync/, and vector/ packages as they actually
exist now (the doc still described a since-renamed ai/ package and a
VectorStoreConfig class that was never added - PgVectorStore is
auto-configured from application.yaml). Also flags what's still
pending rather than implying it's done: HomeboxAiSearchProvider is an
unimplemented stub, SearchService doesn't route on aiSearch yet, and
/sync isn't wired to login or the frontend.

CLAUDE.md

@@ -49,13 +49,15 @@ Package-by-feature layout. Server context path is `/api`. Main endpoints:
 - `GET /api/connections/status` — lists connected services for the current session
 - `DELETE /api/connections/{serviceType}` — removes a service from the session; invalidates the session if no connections remain
 - `POST /api/search` — paged search against the requested service; returns 401 if no active session
+- `POST /api/sync` — triggers a vector-store sync for the requested service; returns 401 if no active session. Not yet triggered on login or called from the frontend — manual/internal trigger only for now.
 
-Six packages:
+Eight packages:
 
 **`shared/`** — cross-cutting types used by more than one feature package
 
-- `ServiceType` (enum): identifies each integrated app (e.g. `HOMEBOX`); used in both `connection/` and `search/`
-- `ServiceProvider` (interface): base for `ConnectionProvider` and `SearchProvider`; declares `getServiceType()`
+- `ServiceType` (enum): identifies each integrated app (e.g. `HOMEBOX`); used across `connection/`, `search/`, `sync/`
+- `ServiceProvider` (interface): base for `ConnectionProvider`, `SearchProvider`, `SyncProvider`; declares `getServiceType()`
+- `ServiceItem`: normalized item shape (`id`, `title`, `description`, `extraData`) returned by both search and sync fetches
 - `Endpoint` (enum): API path constants for all external service calls
 - `SessionKeys`: builds session attribute names of the form `{SERVICE_TYPE}_CONNECTION_ID`
 
@@ -67,29 +69,40 @@ Six packages:
 **`connection/`** — connecting to and persisting service credentials
 
 - `ConnectionProvider` interface: extends `ServiceProvider`; each integrated app implements `login()` and credential checking
+- `ConnectionIdentifiable` interface: `appUrl()`/`username()`/`serviceType()`; implemented by `SearchRequest` and `SyncRequest` so `HomeboxItemClient` can resolve the underlying connection regardless of which feature is calling it
 - `ConnectionService`: auto-discovers providers via Spring injection, dispatches login by `ServiceType`
 - `ConnectionController`: stores `{serviceType}_CONNECTION_ID` in `HttpSession` after login; reads session attributes to build status responses
 - Entity (`ConnectionEntity`) uses **Single Table Inheritance** — one `connections` table with app-specific nullable columns
-- `HomeboxConnectionProvider` / `HomeboxEntity`: Homebox-specific implementation
+- `HomeboxConnectionProvider` / `HomeboxConnectionEntity`: Homebox-specific implementation
 
-**`ai/`** — shared AI infrastructure used by multiple features (search, future image analysis)
+**`homebox/`** — shared Homebox API access
 
-- `EmbeddingService`: wraps Spring AI's `EmbeddingModel`; reused by any feature that needs to generate vectors
-- `VectorStoreConfig`: Spring bean configuration for `PgVectorStore` (pgvector-backed `VectorStore`)
-- All classes here are provider-agnostic — the OpenAI starter is pointed at LiteLLM, so the underlying model is configurable without code changes
+- `HomeboxItemClient`: fetches a page of items from the Homebox entities API and maps them to `ServiceItem`; used by both `HomeboxSearchProvider` (keyword search) and `HomeboxSyncProvider` (vector-store sync) so the fetch/mapping logic isn't duplicated
+
+**`vector/`** — vectorization
+
+- `EmbeddingService`: embeds `ServiceItem`s into pgvector's `VectorStore` and prunes entries that no longer exist upstream. Document ID is `{connectionId}:{itemId}`, so re-syncing upserts existing items instead of duplicating them. Deliberately stateless (only field is the injected `VectorStore`) since it's a singleton bean — the per-sync ID accumulator used for pruning is owned by the caller (`HomeboxSyncProvider`), not held as instance state
+- `PgVectorStore` itself is auto-configured by `spring-ai-starter-vector-store-pgvector` from `application.yaml` (`spring.ai.vectorstore.pgvector.dimensions`) — no manual config class in this codebase
 
 **`search/`** — querying connected services (keyword and AI)
 
 - `SearchProvider` interface: extends `ServiceProvider`; each integrated app implements `getSearchResults()`
-- `SearchService`: maintains two provider maps — keyword providers and AI providers; routes based on `SearchRequest.aiSearch` flag
+- `SearchService`: dispatches by `ServiceType` via a single provider map — **does not yet route on `SearchRequest.aiSearch`**; `HomeboxSearchProvider` and `HomeboxAiSearchProvider` both currently register for `ServiceType.HOMEBOX`, so only one wins the registration (known gap, pending AI search work)
 - `SearchController`: guards with session check before delegating to `SearchService`
-- `SearchRequest`: includes `aiSearch: boolean` — when true, routes to AI provider instead of keyword provider
+- `SearchRequest`: includes `aiSearch: boolean` (not yet consumed, see above) and implements `ConnectionIdentifiable`
 - `PagedSearchResponse`: includes nullable `summary` field — populated only for AI search results; null for keyword search
-- `HomeboxSearchProvider`: keyword search via Homebox API; unchanged from original implementation
-- `HomeboxAiSearchProvider`: AI search via pgvector similarity; returns ranked items + generated summary
-- `HomeboxSyncService`: fetches all Homebox items page by page, embeds them via `EmbeddingService`, stores in `VectorStore`; triggered on connection login (background sync)
+- `HomeboxSearchProvider`: keyword search; delegates the remote fetch to `HomeboxItemClient`
+- `HomeboxAiSearchProvider`: **stub only** — `getSearchResults` throws `UnsupportedOperationException`; the actual similarity search + summary generation is pending
 
-**AI search flow:** on login → background sync indexes all Homebox items into pgvector. On AI search → embed query → pgvector similarity search → top N results passed to `ChatClient` for summary generation → return list + summary. Sync is idempotent (delete-then-reindex per connection).
+**`sync/`** — indexing connected services into the vector store
+
+- `SyncProvider` interface: extends `ServiceProvider`; each integrated app implements `syncVectorStore()`
+- `SyncService`: dispatches by `ServiceType` via a provider map, same pattern as `SearchService`
+- `SyncController`: session-gated `POST /sync`; not currently called by the frontend or triggered on login
+- `SyncRequest`: implements `ConnectionIdentifiable`
+- `HomeboxSyncProvider`: pages through the full Homebox catalog via `HomeboxItemClient`, embedding each page through `EmbeddingService.vectorizeData` and collecting every item ID seen along the way. Once the full page loop finishes, calls `EmbeddingService.deleteStaleVectorEntries` **once** with the complete ID set, removing any previously indexed item no longer present upstream. Order matters — pruning per page instead of once at the end would treat items on other pages as stale and delete them too.
+
+**Pending work (not yet implemented):** `HomeboxAiSearchProvider`'s actual similarity search + summary generation; `SearchService` routing two provider maps by `aiSearch`; triggering `/sync` on login or from the frontend; a frontend sync button and AI search UI.
 
 **`exception/`** — `GlobalExceptionHandler` via `@ControllerAdvice`
 
@@ -110,7 +123,7 @@ React 19 + TypeScript + SCSS, Vite 6 build. Package-by-feature under `components
 
 - PostgreSQL + pgvector (semantic search via embeddings); also used as the Spring Session store (JDBC)
 - LiteLLM as a unified AI proxy; Spring AI OpenAI starter wired to it — `OPENAI_BASE_URL` points to LiteLLM, not OpenAI directly, keeping the underlying model provider configurable
-- `spring-ai-starter-vector-store-pgvector` provides `PgVectorStore`; configured in `ai/VectorStoreConfig`
+- `spring-ai-starter-vector-store-pgvector` provides `PgVectorStore`, auto-configured from `application.yaml` (no manual config class)
 - Embedding dimensions must stay consistent with the configured LiteLLM embedding model — changing models requires re-syncing all indexed items
 - Processing pipeline (Phase 2): stage in DB → LLM inference → refine via UI → export to target app
 

backend/src/main/java/com/vaessl/app/connection/ConnectionIdentifiable.java

@@ -0,0 +1,17 @@
+package com.vaessl.app.connection;
+
+import com.vaessl.app.shared.ServiceType;
+
+/**
+ * Identifies the connection a request targets. Implemented by request records
+ * (e.g. {@code SearchRequest}, {@code SyncRequest}) so a single {@code HomeboxItemClient} can
+ * resolve the underlying connection regardless of which feature is calling it.
+ */
+public interface ConnectionIdentifiable {
+
+    String appUrl();
+
+    String username();
+
+    ServiceType serviceType();
+}

backend/src/main/java/com/vaessl/app/homebox/HomeboxItemClient.java

@@ -0,0 +1,105 @@
+package com.vaessl.app.homebox;
+
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import org.springframework.data.domain.Page;
+import org.springframework.data.domain.PageImpl;
+import org.springframework.data.domain.Pageable;
+import org.springframework.stereotype.Component;
+import org.springframework.web.client.RestClient;
+import com.vaessl.app.connection.ConnectionEntity;
+import com.vaessl.app.connection.ConnectionIdentifiable;
+import com.vaessl.app.connection.ConnectionRepository;
+import com.vaessl.app.connection.HomeboxConnectionEntity;
+import com.vaessl.app.exception.ConnectionNotFoundException;
+import com.vaessl.app.exception.RemoteApiException;
+import com.vaessl.app.shared.ServiceItem;
+import static com.vaessl.app.shared.Endpoint.HOMEBOX_QUERY_ALL_ITEMS;
+
+/**
+ * Fetches items from the Homebox entities API. Shared by {@code HomeboxSearchProvider} and
+ * {@code HomeboxSyncProvider} so both keyword search and vector-store sync page through the same
+ * remote call and item mapping.
+ */
+@Component
+public class HomeboxItemClient {
+
+    private final RestClient.Builder restClientBuilder;
+
+    private final ConnectionRepository cRepository;
+
+
+    public HomeboxItemClient(RestClient.Builder restClienBuilder,
+            ConnectionRepository cRepository) {
+        this.restClientBuilder = restClienBuilder;
+        this.cRepository = cRepository;
+    }
+
+    /**
+     * Fetches one page of items from Homebox for the given connection.
+     *
+     * @param connection identifies which stored connection (app URL, username) to query
+     * @param query optional keyword filter; {@code null} returns all items for the page
+     * @param pageable page number and size to request
+     * @return the mapped page of items along with the resolved connection ID
+     * @throws com.vaessl.app.exception.ConnectionNotFoundException if no matching connection is stored
+     * @throws com.vaessl.app.exception.RemoteApiException if Homebox returns an empty response body
+     */
+    public HomeboxItemPage hbResponse(ConnectionIdentifiable connection, String query,
+            Pageable pageable) {
+        ConnectionEntity entity =
+                cRepository.findByAppUrlAndUsername(connection.appUrl(), connection.username());
+
+        if (!(entity instanceof HomeboxConnectionEntity hbEntity)) {
+            throw new ConnectionNotFoundException();
+        }
+
+        HomeboxItemsResponse response = restClientBuilder.baseUrl(connection.appUrl()).build().get()
+                .uri(u -> u.path(HOMEBOX_QUERY_ALL_ITEMS.getValue()).queryParam("q", query)
+                        .queryParam("page", pageable.getPageNumber() + 1)
+                        .queryParam("pageSize", pageable.getPageSize()).build())
+                .headers(h -> h.setBearerAuth(hbEntity.getToken())).retrieve()
+                .body(HomeboxItemsResponse.class);
+
+        if (response == null) {
+            throw new RemoteApiException(connection.appUrl(), HOMEBOX_QUERY_ALL_ITEMS.getValue());
+        }
+
+        List<ServiceItem> items = response.items().stream().map(i -> {
+            String id = i.id();
+            String title = i.name();
+            String description = i.description();
+
+            HomeboxParent parent = i.parent();
+            Map<String, Object> extraData = new HashMap<>();
+            if (parent.name() != null && !parent.name().isBlank()) {
+                extraData.put("locationName", parent.name());
+            }
+            if (parent.description() != null && !parent.description().isBlank()) {
+                extraData.put("locationDescription", parent.description());
+            }
+
+            return new ServiceItem(id, title, description, extraData);
+        }).toList();
+
+        return new HomeboxItemPage(new PageImpl<>(items, pageable, response.total()),
+                hbEntity.getId());
+
+    }
+
+    public record HomeboxItemPage(Page<ServiceItem> page, Long connectionId) {
+    }
+
+    private record HomeboxItemsResponse(int page, int pageSize, int total,
+            List<HomeboxItem> items) {
+    }
+
+    private record HomeboxItem(String id, String name, String description, HomeboxParent parent) {
+    }
+
+    private record HomeboxParent(String name, String description) {
+    }
+
+
+}

backend/src/main/java/com/vaessl/app/search/HomeboxSearchProvider.java

@@ -1,36 +1,19 @@
 package com.vaessl.app.search;
 
-import java.util.List;
-import java.util.Map;
-
 import org.springframework.data.domain.Page;
-import org.springframework.data.domain.PageImpl;
 import org.springframework.data.domain.Pageable;
 import org.springframework.stereotype.Component;
-import org.springframework.web.client.RestClient;
 
-import com.vaessl.app.connection.ConnectionEntity;
-import com.vaessl.app.connection.ConnectionRepository;
-import com.vaessl.app.connection.HomeboxConnectionEntity;
-import com.vaessl.app.exception.ConnectionNotFoundException;
-import com.vaessl.app.exception.RemoteApiException;
+import com.vaessl.app.homebox.HomeboxItemClient;
 import com.vaessl.app.shared.ServiceItem;
 import com.vaessl.app.shared.ServiceType;
-
-import static com.vaessl.app.shared.Endpoint.*;
+import lombok.RequiredArgsConstructor;
 
 @Component
+@RequiredArgsConstructor
 public class HomeboxSearchProvider implements SearchProvider {
 
-    private final RestClient.Builder restClientBuilder;
-
-    private final ConnectionRepository cRepository;
-
-    public HomeboxSearchProvider(RestClient.Builder restClientBuilder,
-            ConnectionRepository cRepository) {
-        this.restClientBuilder = restClientBuilder;
-        this.cRepository = cRepository;
-    }
+    private final HomeboxItemClient client;
 
     @Override
     public ServiceType getServiceType() {
@@ -39,45 +22,6 @@ public class HomeboxSearchProvider implements SearchProvider {
 
     @Override
     public Page<ServiceItem> getSearchResults(SearchRequest request, Pageable pageable) {
-
-        ConnectionEntity entity =
-                cRepository.findByAppUrlAndUsername(request.appUrl(), request.username());
-
-        if (!(entity instanceof HomeboxConnectionEntity hbEntity)) {
-            throw new ConnectionNotFoundException();
-        }
-
-        HomeboxSearchResponse hbResponse = restClientBuilder.baseUrl(request.appUrl()).build().get()
-                .uri(u -> u.path(HOMEBOX_QUERY_ALL_ITEMS.getValue())
-                        .queryParam("q", request.query())
-                        .queryParam("page", pageable.getPageNumber() + 1)
-                        .queryParam("pageSize", pageable.getPageSize()).build())
-                .headers(h -> h.setBearerAuth(hbEntity.getToken())).retrieve()
-                .body(HomeboxSearchResponse.class);
-
-        if (hbResponse == null) {
-            throw new RemoteApiException(request.appUrl(), HOMEBOX_QUERY_ALL_ITEMS.getValue());
-        }
-
-        List<ServiceItem> items = hbResponse.items().stream().map(i -> {
-            String id = i.id();
-            String title = i.name();
-            String description = i.description();
-            Map<String, Object> extraSearchResponseData = Map.of("parent", i.parent());
-            return new ServiceItem(id, title, description, extraSearchResponseData);
-        }).toList();
-
-        return new PageImpl<>(items, pageable, hbResponse.total());
-    }
-
-    private record HomeboxSearchResponse(int page, int pageSize, int total,
-            List<HomeboxItem> items) {
-    }
-
-    private record HomeboxItem(String id, String name, String description,
-            HomeboxExtraData parent) {
-    }
-
-    private record HomeboxExtraData(String name, String description) {
+        return client.hbResponse(request, request.query(), pageable).page();
     }
 }

backend/src/main/java/com/vaessl/app/search/SearchRequest.java

@@ -1,9 +1,10 @@
 package com.vaessl.app.search;
 
+import com.vaessl.app.connection.ConnectionIdentifiable;
 import com.vaessl.app.shared.ServiceType;
 import jakarta.validation.constraints.NotBlank;
 import jakarta.validation.constraints.NotNull;
 
 public record SearchRequest(@NotBlank String appUrl, @NotBlank String username, String query,
-        @NotNull ServiceType serviceType, boolean aiSearch) {
+        @NotNull ServiceType serviceType, boolean aiSearch) implements ConnectionIdentifiable {
 }

backend/src/main/java/com/vaessl/app/sync/HomeboxSyncProvider.java

@@ -1,17 +1,31 @@
 package com.vaessl.app.sync;
 
-import org.springframework.stereotype.Service;
+import java.util.ArrayList;
+import java.util.List;
+import org.springframework.data.domain.Page;
+import org.springframework.data.domain.PageRequest;
+import org.springframework.data.domain.Pageable;
+import org.springframework.stereotype.Component;
+import com.vaessl.app.homebox.HomeboxItemClient;
+import com.vaessl.app.homebox.HomeboxItemClient.HomeboxItemPage;
+import com.vaessl.app.shared.ServiceItem;
 import com.vaessl.app.shared.ServiceType;
 import com.vaessl.app.vector.EmbeddingService;
+import lombok.RequiredArgsConstructor;
 
-@Service
+/**
+ * Pages through the full Homebox catalog and re-indexes it into the vector store.
+ * Item IDs are collected across all pages before {@link EmbeddingService#deleteStaleVectorEntries}
+ * is called once at the end, rather than after each page: deleting per page would treat every
+ * item outside the current page as stale, wiping out entries from pages already synced.
+ */
+@Component
+@RequiredArgsConstructor
 public class HomeboxSyncProvider implements SyncProvider {
 
     private final EmbeddingService embeddingService;
 
-    public HomeboxSyncProvider(EmbeddingService embeddingService) {
-        this.embeddingService = embeddingService;
-    }
+    private final HomeboxItemClient client;
 
     @Override
     public ServiceType getServiceType() {
@@ -19,9 +33,25 @@ public class HomeboxSyncProvider implements SyncProvider {
     }
 
     @Override
-    public void syncVectorStore() {
-        // TODO Auto-generated method stub
-        throw new UnsupportedOperationException("Unimplemented method 'syncVectorStore'");
-    }
+    public void syncVectorStore(SyncRequest request) {
 
+        int batchSize = 100;
+        int page = 0;
+        Page<ServiceItem> current;
+        Long connectionId = null;
+        List<String> currentItemIds = new ArrayList<>();
+        do {
+            Pageable pageable = PageRequest.of(page, batchSize);
+            HomeboxItemPage result = client.hbResponse(request, null, pageable);
+            current = result.page();
+            if (connectionId == null) {
+                connectionId = result.connectionId();
+            }
+            embeddingService.vectorizeData(current.getContent(), request.serviceType(),
+                    result.connectionId(), currentItemIds);
+            page++;
+        } while (page < current.getTotalPages());
+
+        embeddingService.deleteStaleVectorEntries(connectionId, currentItemIds);
+    }
 }

backend/src/main/java/com/vaessl/app/sync/SyncController.java

@@ -0,0 +1,40 @@
+package com.vaessl.app.sync;
+
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RestController;
+import com.vaessl.app.shared.SessionKeys;
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpSession;
+import jakarta.validation.Valid;
+
+@RestController
+public class SyncController {
+
+    private final SyncService syncService;
+
+    public SyncController(SyncService syncService) {
+        this.syncService = syncService;
+    }
+
+    /**
+     * Triggers a vector-store sync for the requested service. Returns {@code 401 Unauthorized}
+     * if there is no active session.
+     */
+    @PostMapping("/sync")
+    public ResponseEntity<Object> syncVectorStore(@Valid @RequestBody SyncRequest request,
+            HttpServletRequest httpReq) {
+
+        HttpSession session = httpReq.getSession(false);
+
+        if (session == null
+                || session.getAttribute(SessionKeys.connectionId(request.serviceType())) == null) {
+            return ResponseEntity.status(HttpStatus.UNAUTHORIZED).build();
+        }
+        syncService.syncServiceVectorStore(request);
+
+        return ResponseEntity.noContent().build();
+    }
+}

backend/src/main/java/com/vaessl/app/sync/SyncProvider.java

@@ -2,6 +2,16 @@ package com.vaessl.app.sync;
 
 import com.vaessl.app.shared.ServiceProvider;
 
+/**
+ * Implemented by any service that supports indexing its items into the vector store.
+ */
 public interface SyncProvider extends ServiceProvider {
-    public void syncVectorStore();
+
+    /**
+     * Fetches all items from the remote service and indexes them into the vector store,
+     * removing any previously indexed items that no longer exist upstream.
+     *
+     * @param request the sync request containing the app URL and user credentials
+     */
+    public void syncVectorStore(SyncRequest request);
 }

backend/src/main/java/com/vaessl/app/sync/SyncRequest.java

@@ -0,0 +1,10 @@
+package com.vaessl.app.sync;
+
+import com.vaessl.app.connection.ConnectionIdentifiable;
+import com.vaessl.app.shared.ServiceType;
+import jakarta.validation.constraints.NotBlank;
+import jakarta.validation.constraints.NotNull;
+
+public record SyncRequest(@NotBlank String appUrl, @NotBlank String username,
+                @NotNull ServiceType serviceType) implements ConnectionIdentifiable {
+}

backend/src/main/java/com/vaessl/app/sync/SyncService.java

@@ -0,0 +1,40 @@
+package com.vaessl.app.sync;
+
+import java.util.EnumMap;
+import java.util.List;
+import java.util.Map;
+import org.springframework.stereotype.Service;
+import com.vaessl.app.exception.WrongServiceTypeException;
+import com.vaessl.app.shared.ServiceType;
+
+@Service
+public class SyncService {
+
+    private final Map<ServiceType, SyncProvider> providerRegistry;
+
+    public SyncService(List<SyncProvider> providers) {
+        Map<ServiceType, SyncProvider> registry = new EnumMap<>(ServiceType.class);
+        for (SyncProvider provider : providers) {
+            registry.put(provider.getServiceType(), provider);
+        }
+        this.providerRegistry = registry;
+    }
+
+    /**
+     * Dispatches the vector-store sync request to the provider registered for
+     * {@link SyncRequest#serviceType()}.
+     *
+     * @param request the sync request
+     * @throws WrongServiceTypeException if no provider is registered for the given service type
+     */
+    public void syncServiceVectorStore(SyncRequest request) {
+
+        SyncProvider provider = providerRegistry.get(request.serviceType());
+
+        if (provider == null) {
+            throw new WrongServiceTypeException();
+        }
+
+        provider.syncVectorStore(request);
+    }
+}

backend/src/main/java/com/vaessl/app/vector/EmbeddingService.java

@@ -6,10 +6,16 @@ import java.util.List;
 import java.util.Map;
 import org.springframework.ai.document.Document;
 import org.springframework.ai.vectorstore.VectorStore;
+import org.springframework.ai.vectorstore.filter.FilterExpressionBuilder;
 import org.springframework.stereotype.Service;
 import com.vaessl.app.shared.ServiceItem;
 import com.vaessl.app.shared.ServiceType;
 
+/**
+ * Embeds {@link ServiceItem}s into the shared vector store and prunes entries that no longer
+ * exist upstream. Kept stateless (no instance fields besides {@code vectorStore}) since this is
+ * a singleton bean shared across concurrent sync runs; callers own the per-sync ID accumulator.
+ */
 @Service
 public class EmbeddingService {
 
@@ -21,17 +27,31 @@ public class EmbeddingService {
         this.vectorStore = vectorStore;
     }
 
-    public void vectorizeData(List<ServiceItem> items, ServiceType serviceType, Long connectionId) {
+    /**
+     * Embeds and upserts {@code items} into the vector store, appending each item's ID to
+     * {@code currentItemIds} so the caller can later prune stale entries via
+     * {@link #deleteStaleVectorEntries}. Safe to call repeatedly (e.g. once per page) against the
+     * same accumulator across a single sync run.
+     *
+     * @param items the items to embed for this batch
+     * @param serviceType the originating service, stored in each document's metadata
+     * @param connectionId the connection these items belong to
+     * @param currentItemIds accumulator collecting every item ID seen so far in this sync run
+     */
+    public void vectorizeData(List<ServiceItem> items, ServiceType serviceType, Long connectionId,
+            List<String> currentItemIds) {
         List<Document> documents = new ArrayList<>();
+
         for (ServiceItem item : items) {
             documents.add(toDocument(item, serviceType, connectionId));
+            currentItemIds.add(item.id());
         }
         vectorStore.add(documents);
     }
 
     private Document toDocument(ServiceItem item, ServiceType serviceType, Long connectionId) {
         String extraData = buildExtraData(item.extraData());
-        Map<String, Object> metadata = buildMetadata(item, serviceType, connectionId, extraData);
+        Map<String, Object> metadata = buildMetadata(item, serviceType, connectionId);
         String content = buildContent(item, extraData);
         return new Document(connectionId + ":" + item.id(), content, metadata);
     }
@@ -54,18 +74,11 @@ public class EmbeddingService {
     }
 
     private Map<String, Object> buildMetadata(ServiceItem item, ServiceType serviceType,
-            Long connectionId, String extraData) {
+            Long connectionId) {
         Map<String, Object> metadata = new HashMap<>();
         metadata.put("connectionId", connectionId);
         metadata.put("serviceType", serviceType.name());
         metadata.put("itemId", item.id());
-        metadata.put("title", item.title());
-        if (item.description() != null && !item.description().isEmpty()) {
-            metadata.put("description", item.description());
-        }
-        if (!extraData.isEmpty()) {
-            metadata.put("extraData", extraData);
-        }
         return metadata;
     }
 
@@ -80,4 +93,20 @@ public class EmbeddingService {
         return content.toString();
     }
 
+    /**
+     * Deletes every vector for {@code connectionId} whose item ID is not in
+     * {@code currentItemIds}, then clears the accumulator. Must be called once, after every page
+     * for this sync run has gone through {@link #vectorizeData}, not per page — otherwise items
+     * from pages other than the most recent one would look stale and get deleted too.
+     *
+     * @param connectionId the connection to prune stale vectors for
+     * @param currentItemIds every item ID seen across the full sync run; cleared after this call
+     */
+    public void deleteStaleVectorEntries(Long connectionId, List<String> currentItemIds) {
+        FilterExpressionBuilder b = new FilterExpressionBuilder();
+        vectorStore.delete(b.and(b.eq("connectionId", connectionId),
+                b.nin("itemId", new ArrayList<>(currentItemIds))).build());
+
+        currentItemIds.clear();
+    }
 }

backend/src/test/java/com/vaessl/app/search/HomeboxSearchProviderTest.java

@@ -10,8 +10,8 @@ import org.mockito.Mock;
 import org.mockito.junit.jupiter.MockitoExtension;
 import org.springframework.data.domain.PageRequest;
 import org.springframework.data.domain.Pageable;
-import com.vaessl.app.connection.ConnectionRepository;
 import com.vaessl.app.exception.ConnectionNotFoundException;
+import com.vaessl.app.homebox.HomeboxItemClient;
 import static com.vaessl.app.shared.ServiceType.HOMEBOX;
 
 
@@ -19,7 +19,7 @@ import static com.vaessl.app.shared.ServiceType.HOMEBOX;
 class HomeboxSearchProviderTest {
 
     @Mock
-    private ConnectionRepository mockRepo;
+    private HomeboxItemClient client;
 
     @InjectMocks
     private HomeboxSearchProvider provider;
@@ -27,11 +27,11 @@ class HomeboxSearchProviderTest {
     @Test
     void shouldReturnConnectionNotFoundException() {
 
-        when(mockRepo.findByAppUrlAndUsername(MOCK_URL, MOCK_USER)).thenReturn(null);
-
-        SearchRequest request =
-                new SearchRequest(MOCK_URL, MOCK_USER, "test query", HOMEBOX, false);
         Pageable pageable = PageRequest.of(0, 10);
+        SearchRequest request = new SearchRequest(MOCK_URL, MOCK_USER, "", HOMEBOX, false);
+
+        when(client.hbResponse(request, "", pageable)).thenThrow(new ConnectionNotFoundException());
+
         assertThrows(ConnectionNotFoundException.class,
                 () -> provider.getSearchResults(request, pageable));
     }

backend/src/test/java/com/vaessl/app/search/SearchControllerTest.java

@@ -93,7 +93,7 @@ class SearchControllerTest {
                 .andExpect(status().isOk())
                 .andExpect(jsonPath("$.content[0].title").value("MacBook Pro A1398"))
                 .andExpect(jsonPath("$.totalElements").value(1))
-                .andExpect(jsonPath("$.content[0].extraData.parent.name").value("Server Schrank Ikea weiß"));
+                .andExpect(jsonPath("$.content[0].extraData.locationName").value("Server Schrank Ikea weiß"));
     }
 
     @Test