diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 81a3c1e..6ddfd59 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -29,6 +29,7 @@ jobs:
       - run: npm ci
       - run: npm run lint
       - run: npm run build
+      - run: npm run test:offline-types:nonstrict
   test:
     runs-on: ubuntu-latest
     strategy:
diff --git a/package.json b/package.json
index 1fea930..35e313d 100644
--- a/package.json
+++ b/package.json
@@ -31,6 +31,7 @@
     "lint": "ng lint",
     "test:watch": "ng test",
     "test:actions": "node --test .github/actions/classify-mobile-release/classify-mobile-release.spec.mjs && vitest run --config .github/actions/vitest.config.mjs",
+    "test:offline-types:nonstrict": "npm run prebuild:kit && tsc -p projects/kit/offline/tsconfig.nonstrict-null.json",
     "e2e": "playwright test",
     "e2e:ui": "playwright test --ui"
   },
diff --git a/projects/kit/offline/src/lib/offline-replica-schema.ts b/projects/kit/offline/src/lib/offline-replica-schema.ts
index 18fc743..80ccae6 100644
--- a/projects/kit/offline/src/lib/offline-replica-schema.ts
+++ b/projects/kit/offline/src/lib/offline-replica-schema.ts
@@ -97,14 +97,20 @@ type NormalizeReplicaColumnValue<T> = T extends string
         ? string | Date
         : T;
 
-type IsNullableSelectValue<T> = null extends T ? true : undefined extends T ? true : false;
-
-type OfflineReplicaColumnDefForValue<T> = IsNullableSelectValue<T> extends true
-  ? OfflineReplicaColumnDef<
-      NormalizeReplicaColumnValue<StripNullish<T>>,
-      { readonly [replicaNullableBrand]: 'nullable' }
-    >
-  : OfflineReplicaColumnDef<NormalizeReplicaColumnValue<T>, { readonly [replicaNullableBrand]: 'required' }>;
+type StrictNullChecksEnabled = undefined extends null ? false : true;
+
+type ReplicaColumnNullabilityForSelect<T> = StrictNullChecksEnabled extends true
+  ? null extends T
+    ? ReplicaNullableBrand & { readonly [replicaNullableBrand]: 'nullable' }
+    : undefined extends T
+      ? ReplicaNullableBrand & { readonly [replicaNullableBrand]: 'nullable' }
+      : ReplicaNullableBrand & { readonly [replicaNullableBrand]: 'required' }
+  : ReplicaNullableBrand;
+
+type OfflineReplicaColumnDefForValue<T> = OfflineReplicaColumnDef<
+  NormalizeReplicaColumnValue<StripNullish<T>>,
+  ReplicaColumnNullabilityForSelect<T>
+>;
 
 type OfflineReplicaFieldDefForKey<TSelect extends Record<string, unknown>, K extends keyof TSelect> =
   | (StripNullish<TSelect[K]> extends number ? OfflineReplicaServerIdDef : never)
diff --git a/projects/kit/offline/tsconfig.nonstrict-null.json b/projects/kit/offline/tsconfig.nonstrict-null.json
new file mode 100644
index 0000000..daebe5c
--- /dev/null
+++ b/projects/kit/offline/tsconfig.nonstrict-null.json
@@ -0,0 +1,12 @@
+{
+  "compilerOptions": {
+    "module": "es2022",
+    "moduleResolution": "bundler",
+    "noEmit": true,
+    "skipLibCheck": true,
+    "strict": true,
+    "strictNullChecks": false,
+    "target": "es2022"
+  },
+  "files": ["type-tests/nonstrict-null.ts"]
+}
diff --git a/projects/kit/offline/type-tests/nonstrict-null.ts b/projects/kit/offline/type-tests/nonstrict-null.ts
new file mode 100644
index 0000000..5508775
--- /dev/null
+++ b/projects/kit/offline/type-tests/nonstrict-null.ts
@@ -0,0 +1,74 @@
+import {
+  defineOfflineReplicaSchema,
+  defineReplicaEntity,
+  integer,
+  nullable,
+  serverId,
+  text,
+} from '../../../../dist/kit/types/rdlabo-ionic-angular-kit-offline';
+
+// Type alias intentionally exercises Record compatibility in a non-strict-null consumer.
+// eslint-disable-next-line @typescript-eslint/consistent-type-definitions
+type NonStrictSelect = {
+  id: number;
+  title: string;
+  subtitle: string | null;
+  sortOrder: number;
+};
+
+const entity = defineReplicaEntity<NonStrictSelect>()({
+  table: 'nonstrict_items',
+  sourceKey: 'nonstrict_items',
+  scope: 'user',
+  fields: {
+    id: serverId(),
+    title: text(),
+    subtitle: nullable(text()),
+    sortOrder: integer(),
+  },
+});
+
+defineOfflineReplicaSchema({
+  version: 1,
+  entities: [entity],
+  migrations: [],
+});
+
+defineReplicaEntity<NonStrictSelect>()({
+  table: 'nonstrict_invalid_items',
+  sourceKey: 'nonstrict_invalid_items',
+  scope: 'user',
+  fields: {
+    id: serverId(),
+    // @ts-expect-error Primitive affinity checks remain active without strictNullChecks.
+    title: integer(),
+    subtitle: nullable(text()),
+    sortOrder: integer(),
+  },
+});
+
+defineReplicaEntity<NonStrictSelect>()({
+  table: 'nonstrict_missing_items',
+  sourceKey: 'nonstrict_missing_items',
+  scope: 'user',
+  // @ts-expect-error Exact-key validation still rejects a missing select property.
+  fields: {
+    id: serverId(),
+    title: text(),
+    subtitle: nullable(text()),
+  },
+});
+
+defineReplicaEntity<NonStrictSelect>()({
+  table: 'nonstrict_extra_items',
+  sourceKey: 'nonstrict_extra_items',
+  scope: 'user',
+  // @ts-expect-error Exact-key validation still rejects an unknown property.
+  fields: {
+    id: serverId(),
+    title: text(),
+    subtitle: nullable(text()),
+    sortOrder: integer(),
+    extra: text(),
+  },
+});