diff --git a/apps/server/src/core/base/query-cache/base-query-router.spec.ts b/apps/server/src/core/base/query-cache/base-query-router.spec.ts
new file mode 100644
index 00000000..f75ec2cf
--- /dev/null
+++ b/apps/server/src/core/base/query-cache/base-query-router.spec.ts
@@ -0,0 +1,101 @@
+import { BaseQueryRouter } from './base-query-router';
+import { QueryCacheConfigProvider } from './query-cache.config';
+import { BaseRowRepo } from '@docmost/db/repos/base/base-row.repo';
+import { FilterNode, SearchSpec, SortSpec } from '../engine';
+
+type FakeConfig = { enabled: boolean; minRows: number };
+
+function makeRouter(
+  cfg: FakeConfig,
+  count: number,
+): { router: BaseQueryRouter; countSpy: jest.Mock } {
+  const configProvider = {
+    config: {
+      enabled: cfg.enabled,
+      minRows: cfg.minRows,
+      maxCollections: 10,
+      warmTopN: 0,
+    },
+  } as unknown as QueryCacheConfigProvider;
+
+  const countSpy = jest.fn().mockResolvedValue(count);
+  const baseRowRepo = { countActiveRows: countSpy } as unknown as BaseRowRepo;
+
+  return {
+    router: new BaseQueryRouter(configProvider, baseRowRepo),
+    countSpy,
+  };
+}
+
+const filter: FilterNode = {
+  op: 'and',
+  children: [
+    {
+      propertyId: 'p1',
+      op: 'eq',
+      value: 'foo',
+    },
+  ],
+};
+
+const sorts: SortSpec[] = [{ propertyId: 'p1', direction: 'asc' }];
+
+const trgmSearch: SearchSpec = { query: 'hello', mode: 'trgm' };
+const ftsSearch: SearchSpec = { query: 'hello', mode: 'fts' };
+
+const baseArgs = {
+  baseId: 'base-1',
+  workspaceId: 'ws-1',
+};
+
+describe('BaseQueryRouter.decide', () => {
+  it('returns postgres when flag is off', async () => {
+    const { router, countSpy } = makeRouter(
+      { enabled: false, minRows: 10 },
+      1000,
+    );
+    const decision = await router.decide({ ...baseArgs, filter });
+    expect(decision).toBe('postgres');
+    expect(countSpy).not.toHaveBeenCalled();
+  });
+
+  it('returns postgres when row count < minRows', async () => {
+    const { router } = makeRouter({ enabled: true, minRows: 1000 }, 500);
+    const decision = await router.decide({ ...baseArgs, filter });
+    expect(decision).toBe('postgres');
+  });
+
+  it('returns postgres when query has no filter/sort/search', async () => {
+    const { router, countSpy } = makeRouter(
+      { enabled: true, minRows: 10 },
+      10000,
+    );
+    const decision = await router.decide({ ...baseArgs });
+    expect(decision).toBe('postgres');
+    expect(countSpy).not.toHaveBeenCalled();
+  });
+
+  it('returns postgres when search.mode === "fts" even for large base', async () => {
+    const { router } = makeRouter({ enabled: true, minRows: 10 }, 10000);
+    const decision = await router.decide({ ...baseArgs, search: ftsSearch });
+    expect(decision).toBe('postgres');
+  });
+
+  it('returns cache when flag on + rows >= minRows + has filter', async () => {
+    const { router } = makeRouter({ enabled: true, minRows: 1000 }, 1000);
+    const decision = await router.decide({ ...baseArgs, filter });
+    expect(decision).toBe('cache');
+  });
+
+  it('returns cache when flag on + rows >= minRows + has sort', async () => {
+    const { router } = makeRouter({ enabled: true, minRows: 1000 }, 5000);
+    const decision = await router.decide({ ...baseArgs, sorts });
+    expect(decision).toBe('cache');
+  });
+
+  it('returns postgres when flag on + rows >= minRows + has trgm search (v1 gates search to postgres)', async () => {
+    const { router } = makeRouter({ enabled: true, minRows: 10 }, 10000);
+    const decision = await router.decide({ ...baseArgs, search: trgmSearch });
+    expect(decision).toBe('postgres');
+  });
+});
diff --git a/apps/server/src/core/base/query-cache/base-query-router.ts b/apps/server/src/core/base/query-cache/base-query-router.ts
index c7cca3fd..edf0706d 100644
--- a/apps/server/src/core/base/query-cache/base-query-router.ts
+++ b/apps/server/src/core/base/query-cache/base-query-router.ts
@@ -1,16 +1,43 @@
 import { Injectable } from '@nestjs/common';
 import { QueryCacheConfigProvider } from './query-cache.config';
+import { BaseRowRepo } from '@docmost/db/repos/base/base-row.repo';
+import type { FilterNode, SearchSpec, SortSpec } from '../engine';
 
 export type RouteDecision = 'postgres' | 'cache';
 
+export type RouteDecideArgs = {
+  baseId: string;
+  workspaceId: string;
+  filter?: FilterNode;
+  sorts?: SortSpec[];
+  search?: SearchSpec;
+};
+
 @Injectable()
 export class BaseQueryRouter {
-  constructor(private readonly configProvider: QueryCacheConfigProvider) {}
+  constructor(
+    private readonly configProvider: QueryCacheConfigProvider,
+    private readonly baseRowRepo: BaseRowRepo,
+  ) {}
 
-  // Stubbed: routes always to postgres in this commit so the existing
-  // behavior is preserved. Real decision logic is added in task 6.
-  decide(_args: unknown): RouteDecision {
-    if (!this.configProvider.config.enabled) return 'postgres';
-    return 'postgres';
+  async decide(args: RouteDecideArgs): Promise<RouteDecision> {
+    const { enabled, minRows } = this.configProvider.config;
+    if (!enabled) return 'postgres';
+
+    const hasFilter = !!args.filter;
+    const hasSorts = !!args.sorts && args.sorts.length > 0;
+    const hasSearch = !!args.search;
+    if (!hasFilter && !hasSorts && !hasSearch) return 'postgres';
+
+    // v1: any search stays on Postgres. Trgm search also stays on Postgres
+    // until the loader populates `search_text`; re-evaluate after that lands.
+    if (args.search) return 'postgres';
+
+    const count = await this.baseRowRepo.countActiveRows(args.baseId, {
+      workspaceId: args.workspaceId,
+    });
+    if (count < minRows) return 'postgres';
+
+    return 'cache';
   }
 }
diff --git a/apps/server/src/core/base/services/base-row.service.ts b/apps/server/src/core/base/services/base-row.service.ts
index 0ce49d14..74a78f75 100644
--- a/apps/server/src/core/base/services/base-row.service.ts
+++ b/apps/server/src/core/base/services/base-row.service.ts
@@ -1,6 +1,7 @@
 import {
   BadRequestException,
   Injectable,
+  Logger,
   NotFoundException,
 } from '@nestjs/common';
 import { InjectKysely } from 'nestjs-kysely';
@@ -9,6 +10,8 @@ import { KyselyDB } from '@docmost/db/types/kysely.types';
 import { BaseRowRepo } from '@docmost/db/repos/base/base-row.repo';
 import { BasePropertyRepo } from '@docmost/db/repos/base/base-property.repo';
 import { BaseViewRepo } from '@docmost/db/repos/base/base-view.repo';
+import { BaseQueryRouter } from '../query-cache/base-query-router';
+import { BaseQueryCacheService } from '../query-cache/base-query-cache.service';
 import { CreateRowDto } from '../dto/create-row.dto';
 import {
   UpdateRowDto,
@@ -44,12 +47,16 @@ import {
 
 @Injectable()
 export class BaseRowService {
+  private readonly logger = new Logger(BaseRowService.name);
+
   constructor(
     @InjectKysely() private readonly db: KyselyDB,
     private readonly baseRowRepo: BaseRowRepo,
     private readonly basePropertyRepo: BasePropertyRepo,
     private readonly baseViewRepo: BaseViewRepo,
     private readonly eventEmitter: EventEmitter2,
+    private readonly queryRouter: BaseQueryRouter,
+    private readonly queryCache: BaseQueryCacheService,
   ) {}
 
   async create(userId: string, workspaceId: string, dto: CreateRowDto) {
@@ -202,6 +209,31 @@ export class BaseRowService {
       direction: s.direction,
     }));
 
+    const decision = await this.queryRouter.decide({
+      baseId: dto.baseId,
+      workspaceId,
+      filter,
+      sorts,
+      search,
+    });
+
+    if (decision === 'cache') {
+      try {
+        return await this.queryCache.list(dto.baseId, workspaceId, {
+          filter,
+          sorts,
+          search,
+          schema,
+          pagination,
+        });
+      } catch (err) {
+        this.logger.warn(
+          `Cache list failed for base ${dto.baseId}, falling back to Postgres`,
+          err as Error,
+        );
+      }
+    }
+
     return this.baseRowRepo.list({
       baseId: dto.baseId,
       workspaceId,