limitless-angular
diff --git a/packages/sanity/ng-package.json b/packages/sanity/ng-package.json
@@ -16,7 +16,6 @@
     "@sanity/visual-editing-csm",
     "@vercel/stega",
     "dequal",
-    "lodash-es",
     "xstate"
   ]
 }
diff --git a/packages/sanity/package.json b/packages/sanity/package.json
@@ -51,7 +51,6 @@
     "@sanity/visual-editing-csm": "^3.0.9",
     "@vercel/stega": "1.1.0",
     "dequal": "^2.0.3",
-    "lodash-es": "^4.17.21",
     "tslib": "^2.3.0",
     "xstate": "^5.19.2"
   },
@@ -67,7 +66,6 @@
     "@sanity/client": "^7.22.1",
     "@testing-library/angular": "^19.4.1",
     "@testing-library/dom": "^10.4.0",
-    "@types/lodash-es": "^4.17.12",
     "@types/node": "~22.19.20",
     "angular-eslint": "^22.0.0",
     "eslint": "^9.8.0",

diff --git a/packages/sanity/portabletext/src/services/block-handler.service.ts b/packages/sanity/portabletext/src/services/block-handler.service.ts
@@ -1,13 +1,13 @@
 import { Injectable } from '@angular/core';
 import { PortableTextBlock } from '@portabletext/types';
-import { memoize } from 'lodash-es';
 
 import {
   MissingComponentHandler,
   PortableTextAngularComponents,
   Serializable,
 } from '../types';
 import { serializeBlock } from '../utils';
+import { memoize } from '../utils/memoize';
 import { unknownBlockStyleWarning } from '../warnings';
 import { isPortableTextBlock } from '@portabletext/toolkit';
 

diff --git a/packages/sanity/portabletext/src/services/list-item-handler.service.ts b/packages/sanity/portabletext/src/services/list-item-handler.service.ts
@@ -4,14 +4,14 @@ import {
   PortableTextMarkDefinition,
   PortableTextSpan,
 } from '@portabletext/types';
-import { memoize } from 'lodash-es';
 
 import {
   MissingComponentHandler,
   PortableTextAngularComponents,
   Serializable,
 } from '../types';
 import { serializeBlock } from '../utils';
+import { memoize } from '../utils/memoize';
 import { unknownListItemStyleWarning } from '../warnings';
 import { isPortableTextListItemBlock } from '@portabletext/toolkit';
 

diff --git a/packages/sanity/portabletext/src/utils/memoize.spec.ts b/packages/sanity/portabletext/src/utils/memoize.spec.ts
@@ -0,0 +1,28 @@
+import { describe, expect, it, vi } from 'vitest';
+
+import { memoize } from './memoize';
+
+describe('memoize', () => {
+  it('returns the cached result for the same argument reference', () => {
+    const fn = vi.fn((value: { text: string }) => [value.text]);
+    const memoized = memoize(fn);
+    const value = { text: 'cached' };
+
+    const first = memoized(value);
+    const second = memoized(value);
+
+    expect(second).toBe(first);
+    expect(fn).toHaveBeenCalledOnce();
+  });
+
+  it('treats equal object values with different references as separate keys', () => {
+    const fn = vi.fn((value: { text: string }) => [value.text]);
+    const memoized = memoize(fn);
+
+    const first = memoized({ text: 'same value' });
+    const second = memoized({ text: 'same value' });
+
+    expect(second).not.toBe(first);
+    expect(fn).toHaveBeenCalledTimes(2);
+  });
+});
diff --git a/packages/sanity/portabletext/src/utils/memoize.ts b/packages/sanity/portabletext/src/utils/memoize.ts
@@ -0,0 +1,15 @@
+export function memoize<Arg, Result>(
+  fn: (arg: Arg) => Result,
+): (arg: Arg) => Result {
+  const cache = new Map<Arg, Result>();
+
+  return (arg) => {
+    if (cache.has(arg)) {
+      return cache.get(arg) as Result;
+    }
+
+    const result = fn(arg);
+    cache.set(arg, result);
+    return result;
+  };
+}
diff --git a/packages/sanity/preview-kit/src/live-preview.service.ts b/packages/sanity/preview-kit/src/live-preview.service.ts
@@ -9,7 +9,7 @@ import type {
   SanityClient,
   SyncTag,
 } from '@sanity/client';
-import isEqual from 'lodash-es/isEqual';
+import { dequal as isEqual } from 'dequal';
 import {
   EMPTY,
   Observable,

diff --git a/packages/sanity/preview-kit/src/live-query-provider/live-queries.service.spec.ts b/packages/sanity/preview-kit/src/live-query-provider/live-queries.service.spec.ts
@@ -1,5 +1,6 @@
 import { getQueryCacheKey } from './utils';
 import { LiveQueriesService } from './live-queries.service';
+import type { ContentSourceMap } from '@sanity/client';
 
 describe('LiveQueriesService', () => {
   it('tracks query subscriptions by query, params, and perspective', () => {
@@ -54,4 +55,40 @@ describe('LiveQueriesService', () => {
 
     subscription.unsubscribe();
   });
+
+  it('uses deep equality for source maps when deciding whether to update', () => {
+    const service = new LiveQueriesService();
+    const query = '*[_id == $id][0]';
+    const params = { id: 'post' };
+    const key = getQueryCacheKey(query, params, 'drafts');
+    const result = { title: 'Live' };
+    const sourceMap = {
+      documents: [{ _id: 'post', _type: 'post' }],
+      mappings: {
+        title: {
+          source: {
+            document: 0,
+            path: 0,
+            type: 'documentValue',
+          },
+          type: 'value',
+        },
+      },
+      paths: ['title'],
+    } satisfies ContentSourceMap;
+
+    expect(service.update(key, result, sourceMap, ['s1:post'])).toBe(true);
+    expect(
+      service.update(
+        key,
+        { title: 'Live' },
+        {
+          ...sourceMap,
+          documents: [{ _id: 'post', _type: 'post' }],
+          paths: ['title'],
+        },
+        ['s1:post'],
+      ),
+    ).toBe(false);
+  });
 });
diff --git a/packages/sanity/preview-kit/src/live-query-provider/live-queries.service.ts b/packages/sanity/preview-kit/src/live-query-provider/live-queries.service.ts
@@ -1,6 +1,6 @@
 import { Injectable } from '@angular/core';
 import type { ContentSourceMap, QueryParams, SyncTag } from '@sanity/client';
-import isEqual from 'lodash-es/isEqual';
+import { dequal as isEqual } from 'dequal';
 import { BehaviorSubject, Observable } from 'rxjs';
 import { distinctUntilChanged, map } from 'rxjs/operators';
 

diff --git a/packages/sanity/preview-kit/src/perspective.service.ts b/packages/sanity/preview-kit/src/perspective.service.ts
@@ -7,7 +7,7 @@ import {
   type LoaderControllerMsg,
   type LoaderNodeMsg,
 } from '@sanity/presentation-comlink';
-import isEqual from 'lodash-es/isEqual';
+import { dequal as isEqual } from 'dequal';
 import { BehaviorSubject, combineLatest, type Observable } from 'rxjs';
 import { distinctUntilChanged, map } from 'rxjs/operators';
 

diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
diff --git a/tools/angular-compat/pack.mjs b/tools/angular-compat/pack.mjs
@@ -52,7 +52,6 @@ export function packCompatibilityArtifact() {
       '@angular/compiler-cli': toolchain.compilerCliVersion,
       '@angular/core': toolchain.angularVersion,
       '@angular/router': toolchain.angularVersion,
-      '@types/lodash-es': packageJson.devDependencies['@types/lodash-es'],
       '@types/node': packageJson.devDependencies['@types/node'],
       'ng-packagr': toolchain.ngPackagrVersion,
       typescript: toolchain.typescriptVersion,