[compiler] enablePreserveMemo treats manual deps as non-nullable

The `@enablePreserveExistingMemoizationGuarantees` mode can still fail to preserve manual memoization due to mismtached dependencies. Specifically, where the user's dependencies are more precise than the compiler infers bc the compiler is being conservative about what might be nullable. In this mode though we're intentionally using information from the manual memoization and can also rely on the deps as a signal for what's non-nullable.

The idea of the PR is that we treat manual memo deps just like other inferred-as-non-nullable objects during PropagateScopeDeps. We're careful to not treat the full path as non-nullable, only up to the last property index. So `x.y.z` as a manual dep treats `x` and `x.y` as non-nullable, allowing us to preserve a conditional dependency on `x.y.z`.

Optionals within manual dependencies are a bit trickier and aren't handled yet, but hopefully that's less common and something we can improve in a follow-up. Not handling them just means that developers may hit false positives on validating existing memoization if they use optional chains in manual dependencies.

compiler/apps/playground/components/AccordionWindow.tsx

@@ -7,6 +7,7 @@
 
 import {Resizable} from 're-resizable';
 import React, {
+  useCallback,
   useId,
   unstable_ViewTransition as ViewTransition,
   unstable_addTransitionType as addTransitionType,
@@ -65,7 +66,7 @@ function AccordionWindowItem({
 
   const transitionName = `accordion-window-item-${id}`;
 
-  const toggleTabs = (): void => {
+  const toggleTabs = () => {
     startTransition(() => {
       addTransitionType(EXPAND_ACCORDION_TRANSITION);
       const nextState = new Set(tabsOpen);

compiler/apps/playground/components/Editor/ConfigEditor.tsx

@@ -6,6 +6,7 @@
  */
 
 import MonacoEditor, {loader, type Monaco} from '@monaco-editor/react';
+import {PluginOptions} from 'babel-plugin-react-compiler';
 import type {editor} from 'monaco-editor';
 import * as monaco from 'monaco-editor';
 import React, {
@@ -17,8 +18,9 @@ import React, {
 } from 'react';
 import {Resizable} from 're-resizable';
 import {useStore, useStoreDispatch} from '../StoreContext';
-import {monacoConfigOptions} from './monacoOptions';
+import {monacoOptions} from './monacoOptions';
 import {IconChevron} from '../Icons/IconChevron';
+import prettyFormat from 'pretty-format';
 import {CONFIG_PANEL_TRANSITION} from '../../lib/transitionTypes';
 
 // @ts-expect-error - webpack asset/source loader handles .d.ts files as strings
@@ -27,9 +29,9 @@ import compilerTypeDefs from 'babel-plugin-react-compiler/dist/index.d.ts';
 loader.config({monaco});
 
 export default function ConfigEditor({
-  formattedAppliedConfig,
+  appliedOptions,
 }: {
-  formattedAppliedConfig: string;
+  appliedOptions: PluginOptions | null;
 }): React.ReactElement {
   const [isExpanded, setIsExpanded] = useState(false);
 
@@ -47,7 +49,7 @@ export default function ConfigEditor({
               setIsExpanded(false);
             });
           }}
-          formattedAppliedConfig={formattedAppliedConfig}
+          appliedOptions={appliedOptions}
         />
       </div>
       <div
@@ -69,10 +71,10 @@ export default function ConfigEditor({
 
 function ExpandedEditor({
   onToggle,
-  formattedAppliedConfig,
+  appliedOptions,
 }: {
-  onToggle: (expanded: boolean) => void;
-  formattedAppliedConfig: string;
+  onToggle: () => void;
+  appliedOptions: PluginOptions | null;
 }): React.ReactElement {
   const store = useStore();
   const dispatchStore = useStoreDispatch();
@@ -120,6 +122,13 @@ function ExpandedEditor({
     });
   };
 
+  const formattedAppliedOptions = appliedOptions
+    ? prettyFormat(appliedOptions, {
+        printFunctionName: false,
+        printBasicPrototype: false,
+      })
+    : 'Invalid configs';
+
   return (
     <ViewTransition
       update={{[CONFIG_PANEL_TRANSITION]: 'slide-in', default: 'none'}}>
@@ -149,7 +158,7 @@ function ExpandedEditor({
                 Config Overrides
               </h2>
             </div>
-            <div className="flex-1 border border-gray-300">
+            <div className="flex-1 rounded-lg overflow-hidden border border-gray-300">
               <MonacoEditor
                 path={'config.ts'}
                 language={'typescript'}
@@ -158,7 +167,16 @@ function ExpandedEditor({
                 onChange={handleChange}
                 loading={''}
                 className="monaco-editor-config"
-                options={monacoConfigOptions}
+                options={{
+                  ...monacoOptions,
+                  lineNumbers: 'off',
+                  renderLineHighlight: 'none',
+                  overviewRulerBorder: false,
+                  overviewRulerLanes: 0,
+                  fontSize: 12,
+                  scrollBeyondLastLine: false,
+                  glyphMargin: false,
+                }}
               />
             </div>
           </div>
@@ -168,16 +186,23 @@ function ExpandedEditor({
                 Applied Configs
               </h2>
             </div>
-            <div className="flex-1 border border-gray-300">
+            <div className="flex-1 rounded-lg overflow-hidden border border-gray-300">
               <MonacoEditor
                 path={'applied-config.js'}
                 language={'javascript'}
-                value={formattedAppliedConfig}
+                value={formattedAppliedOptions}
                 loading={''}
                 className="monaco-editor-applied-config"
                 options={{
-                  ...monacoConfigOptions,
+                  ...monacoOptions,
+                  lineNumbers: 'off',
+                  renderLineHighlight: 'none',
+                  overviewRulerBorder: false,
+                  overviewRulerLanes: 0,
+                  fontSize: 12,
+                  scrollBeyondLastLine: false,
                   readOnly: true,
+                  glyphMargin: false,
                 }}
               />
             </div>

compiler/apps/playground/components/Editor/EditorImpl.tsx

@@ -5,17 +5,316 @@
  * LICENSE file in the root directory of this source tree.
  */
 
-import {
+import {parse as babelParse, ParseResult} from '@babel/parser';
+import * as HermesParser from 'hermes-parser';
+import * as t from '@babel/types';
+import BabelPluginReactCompiler, {
+  CompilerError,
   CompilerErrorDetail,
   CompilerDiagnostic,
+  Effect,
+  ErrorCategory,
+  parseConfigPragmaForTests,
+  ValueKind,
+  type Hook,
+  PluginOptions,
+  CompilerPipelineValue,
+  parsePluginOptions,
+  printReactiveFunctionWithOutlined,
+  printFunctionWithOutlined,
+  type LoggerEvent,
 } from 'babel-plugin-react-compiler';
-import {useDeferredValue, useMemo, useState} from 'react';
+import {
+  useDeferredValue,
+  useMemo,
+  unstable_ViewTransition as ViewTransition,
+} from 'react';
 import {useStore} from '../StoreContext';
 import ConfigEditor from './ConfigEditor';
 import Input from './Input';
-import {CompilerOutput, default as Output} from './Output';
-import {compile} from '../../lib/compilation';
-import prettyFormat from 'pretty-format';
+import {
+  CompilerOutput,
+  CompilerTransformOutput,
+  default as Output,
+  PrintedCompilerPipelineValue,
+} from './Output';
+import {transformFromAstSync} from '@babel/core';
+
+function parseInput(
+  input: string,
+  language: 'flow' | 'typescript',
+): ParseResult<t.File> {
+  // Extract the first line to quickly check for custom test directives
+  if (language === 'flow') {
+    return HermesParser.parse(input, {
+      babel: true,
+      flow: 'all',
+      sourceType: 'module',
+      enableExperimentalComponentSyntax: true,
+    });
+  } else {
+    return babelParse(input, {
+      plugins: ['typescript', 'jsx'],
+      sourceType: 'module',
+    }) as ParseResult<t.File>;
+  }
+}
+
+function invokeCompiler(
+  source: string,
+  language: 'flow' | 'typescript',
+  options: PluginOptions,
+): CompilerTransformOutput {
+  const ast = parseInput(source, language);
+  let result = transformFromAstSync(ast, source, {
+    filename: '_playgroundFile.js',
+    highlightCode: false,
+    retainLines: true,
+    plugins: [[BabelPluginReactCompiler, options]],
+    ast: true,
+    sourceType: 'module',
+    configFile: false,
+    sourceMaps: true,
+    babelrc: false,
+  });
+  if (result?.ast == null || result?.code == null || result?.map == null) {
+    throw new Error('Expected successful compilation');
+  }
+  return {
+    code: result.code,
+    sourceMaps: result.map,
+    language,
+  };
+}
+
+const COMMON_HOOKS: Array<[string, Hook]> = [
+  [
+    'useFragment',
+    {
+      valueKind: ValueKind.Frozen,
+      effectKind: Effect.Freeze,
+      noAlias: true,
+      transitiveMixedData: true,
+    },
+  ],
+  [
+    'usePaginationFragment',
+    {
+      valueKind: ValueKind.Frozen,
+      effectKind: Effect.Freeze,
+      noAlias: true,
+      transitiveMixedData: true,
+    },
+  ],
+  [
+    'useRefetchableFragment',
+    {
+      valueKind: ValueKind.Frozen,
+      effectKind: Effect.Freeze,
+      noAlias: true,
+      transitiveMixedData: true,
+    },
+  ],
+  [
+    'useLazyLoadQuery',
+    {
+      valueKind: ValueKind.Frozen,
+      effectKind: Effect.Freeze,
+      noAlias: true,
+      transitiveMixedData: true,
+    },
+  ],
+  [
+    'usePreloadedQuery',
+    {
+      valueKind: ValueKind.Frozen,
+      effectKind: Effect.Freeze,
+      noAlias: true,
+      transitiveMixedData: true,
+    },
+  ],
+];
+
+function parseOptions(
+  source: string,
+  mode: 'compiler' | 'linter',
+  configOverrides: string,
+): PluginOptions {
+  // Extract the first line to quickly check for custom test directives
+  const pragma = source.substring(0, source.indexOf('\n'));
+
+  const parsedPragmaOptions = parseConfigPragmaForTests(pragma, {
+    compilationMode: 'infer',
+    environment:
+      mode === 'linter'
+        ? {
+            // enabled in compiler
+            validateRefAccessDuringRender: false,
+            // enabled in linter
+            validateNoSetStateInRender: true,
+            validateNoSetStateInEffects: true,
+            validateNoJSXInTryStatements: true,
+            validateNoImpureFunctionsInRender: true,
+            validateStaticComponents: true,
+            validateNoFreezingKnownMutableFunctions: true,
+            validateNoVoidUseMemo: true,
+          }
+        : {
+            /* use defaults for compiler mode */
+          },
+  });
+
+  // Parse config overrides from config editor
+  let configOverrideOptions: any = {};
+  const configMatch = configOverrides.match(/^\s*import.*?\n\n\((.*)\)/s);
+  if (configOverrides.trim()) {
+    if (configMatch && configMatch[1]) {
+      const configString = configMatch[1].replace(/satisfies.*$/, '').trim();
+      configOverrideOptions = new Function(`return (${configString})`)();
+    } else {
+      throw new Error('Invalid override format');
+    }
+  }
+
+  const opts: PluginOptions = parsePluginOptions({
+    ...parsedPragmaOptions,
+    ...configOverrideOptions,
+    environment: {
+      ...parsedPragmaOptions.environment,
+      ...configOverrideOptions.environment,
+      customHooks: new Map([...COMMON_HOOKS]),
+    },
+  });
+
+  return opts;
+}
+
+function compile(
+  source: string,
+  mode: 'compiler' | 'linter',
+  configOverrides: string,
+): [CompilerOutput, 'flow' | 'typescript', PluginOptions | null] {
+  const results = new Map<string, Array<PrintedCompilerPipelineValue>>();
+  const error = new CompilerError();
+  const otherErrors: Array<CompilerErrorDetail | CompilerDiagnostic> = [];
+  const upsert: (result: PrintedCompilerPipelineValue) => void = result => {
+    const entry = results.get(result.name);
+    if (Array.isArray(entry)) {
+      entry.push(result);
+    } else {
+      results.set(result.name, [result]);
+    }
+  };
+  let language: 'flow' | 'typescript';
+  if (source.match(/\@flow/)) {
+    language = 'flow';
+  } else {
+    language = 'typescript';
+  }
+  let transformOutput;
+
+  let baseOpts: PluginOptions | null = null;
+  try {
+    baseOpts = parseOptions(source, mode, configOverrides);
+  } catch (err) {
+    error.details.push(
+      new CompilerErrorDetail({
+        category: ErrorCategory.Config,
+        reason: `Unexpected failure when transforming configs! \n${err}`,
+        loc: null,
+        suggestions: null,
+      }),
+    );
+  }
+  if (baseOpts) {
+    try {
+      const logIR = (result: CompilerPipelineValue): void => {
+        switch (result.kind) {
+          case 'ast': {
+            break;
+          }
+          case 'hir': {
+            upsert({
+              kind: 'hir',
+              fnName: result.value.id,
+              name: result.name,
+              value: printFunctionWithOutlined(result.value),
+            });
+            break;
+          }
+          case 'reactive': {
+            upsert({
+              kind: 'reactive',
+              fnName: result.value.id,
+              name: result.name,
+              value: printReactiveFunctionWithOutlined(result.value),
+            });
+            break;
+          }
+          case 'debug': {
+            upsert({
+              kind: 'debug',
+              fnName: null,
+              name: result.name,
+              value: result.value,
+            });
+            break;
+          }
+          default: {
+            const _: never = result;
+            throw new Error(`Unhandled result ${result}`);
+          }
+        }
+      };
+      // Add logger options to the parsed options
+      const opts = {
+        ...baseOpts,
+        logger: {
+          debugLogIRs: logIR,
+          logEvent: (_filename: string | null, event: LoggerEvent): void => {
+            if (event.kind === 'CompileError') {
+              otherErrors.push(event.detail);
+            }
+          },
+        },
+      };
+      transformOutput = invokeCompiler(source, language, opts);
+    } catch (err) {
+      /**
+       * error might be an invariant violation or other runtime error
+       * (i.e. object shape that is not CompilerError)
+       */
+      if (err instanceof CompilerError && err.details.length > 0) {
+        error.merge(err);
+      } else {
+        /**
+         * Handle unexpected failures by logging (to get a stack trace)
+         * and reporting
+         */
+        error.details.push(
+          new CompilerErrorDetail({
+            category: ErrorCategory.Invariant,
+            reason: `Unexpected failure when transforming input! \n${err}`,
+            loc: null,
+            suggestions: null,
+          }),
+        );
+      }
+    }
+  }
+  // Only include logger errors if there weren't other errors
+  if (!error.hasErrors() && otherErrors.length !== 0) {
+    otherErrors.forEach(e => error.details.push(e));
+  }
+  if (error.hasErrors()) {
+    return [{kind: 'err', results, error}, language, baseOpts];
+  }
+  return [
+    {kind: 'ok', results, transformOutput, errors: error.details},
+    language,
+    baseOpts,
+  ];
+}
 
 export default function Editor(): JSX.Element {
   const store = useStore();
@@ -28,7 +327,6 @@ export default function Editor(): JSX.Element {
     () => compile(deferredStore.source, 'linter', deferredStore.config),
     [deferredStore.source, deferredStore.config],
   );
-  const [formattedAppliedConfig, setFormattedAppliedConfig] = useState('');
 
   let mergedOutput: CompilerOutput;
   let errors: Array<CompilerErrorDetail | CompilerDiagnostic>;
@@ -42,22 +340,11 @@ export default function Editor(): JSX.Element {
     mergedOutput = compilerOutput;
     errors = compilerOutput.error.details;
   }
-
-  if (appliedOptions) {
-    const formatted = prettyFormat(appliedOptions, {
-      printFunctionName: false,
-      printBasicPrototype: false,
-    });
-    if (formatted !== formattedAppliedConfig) {
-      setFormattedAppliedConfig(formatted);
-    }
-  }
-
   return (
     <>
       <div className="relative flex top-14">
         <div className="flex-shrink-0">
-          <ConfigEditor formattedAppliedConfig={formattedAppliedConfig} />
+          <ConfigEditor appliedOptions={appliedOptions} />
         </div>
         <div className="flex flex-1 min-w-0">
           <Input language={language} errors={errors} />

compiler/apps/playground/components/Editor/Output.tsx

@@ -372,18 +372,12 @@ function TextTabContent({
           loading={''}
           options={{
             ...monacoOptions,
-            scrollbar: {
-              vertical: 'hidden',
-            },
-            dimension: {
-              width: 0,
-              height: 0,
-            },
             readOnly: true,
             lineNumbers: 'off',
             glyphMargin: false,
             // Undocumented see https://github.com/Microsoft/vscode/issues/30795#issuecomment-410998882
-            overviewRulerLanes: 0,
+            lineDecorationsWidth: 0,
+            lineNumbersMinChars: 0,
           }}
         />
       ) : (

compiler/apps/playground/components/Editor/monacoOptions.ts

@@ -32,14 +32,3 @@ export const monacoOptions: Partial<EditorProps['options']> = {
 
   tabSize: 2,
 };
-
-export const monacoConfigOptions: Partial<EditorProps['options']> = {
-  ...monacoOptions,
-  lineNumbers: 'off',
-  renderLineHighlight: 'none',
-  overviewRulerBorder: false,
-  overviewRulerLanes: 0,
-  fontSize: 12,
-  scrollBeyondLastLine: false,
-  glyphMargin: false,
-};

compiler/apps/playground/lib/compilation.ts

@@ -1,308 +0,0 @@
-/**
- * Copyright (c) Meta Platforms, Inc. and affiliates.
- *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
- */
-
-import {parse as babelParse, ParseResult} from '@babel/parser';
-import * as HermesParser from 'hermes-parser';
-import * as t from '@babel/types';
-import BabelPluginReactCompiler, {
-  CompilerError,
-  CompilerErrorDetail,
-  CompilerDiagnostic,
-  Effect,
-  ErrorCategory,
-  parseConfigPragmaForTests,
-  ValueKind,
-  type Hook,
-  PluginOptions,
-  CompilerPipelineValue,
-  parsePluginOptions,
-  printReactiveFunctionWithOutlined,
-  printFunctionWithOutlined,
-  type LoggerEvent,
-} from 'babel-plugin-react-compiler';
-import {transformFromAstSync} from '@babel/core';
-import type {
-  CompilerOutput,
-  CompilerTransformOutput,
-  PrintedCompilerPipelineValue,
-} from '../components/Editor/Output';
-
-function parseInput(
-  input: string,
-  language: 'flow' | 'typescript',
-): ParseResult<t.File> {
-  // Extract the first line to quickly check for custom test directives
-  if (language === 'flow') {
-    return HermesParser.parse(input, {
-      babel: true,
-      flow: 'all',
-      sourceType: 'module',
-      enableExperimentalComponentSyntax: true,
-    });
-  } else {
-    return babelParse(input, {
-      plugins: ['typescript', 'jsx'],
-      sourceType: 'module',
-    }) as ParseResult<t.File>;
-  }
-}
-
-function invokeCompiler(
-  source: string,
-  language: 'flow' | 'typescript',
-  options: PluginOptions,
-): CompilerTransformOutput {
-  const ast = parseInput(source, language);
-  let result = transformFromAstSync(ast, source, {
-    filename: '_playgroundFile.js',
-    highlightCode: false,
-    retainLines: true,
-    plugins: [[BabelPluginReactCompiler, options]],
-    ast: true,
-    sourceType: 'module',
-    configFile: false,
-    sourceMaps: true,
-    babelrc: false,
-  });
-  if (result?.ast == null || result?.code == null || result?.map == null) {
-    throw new Error('Expected successful compilation');
-  }
-  return {
-    code: result.code,
-    sourceMaps: result.map,
-    language,
-  };
-}
-
-const COMMON_HOOKS: Array<[string, Hook]> = [
-  [
-    'useFragment',
-    {
-      valueKind: ValueKind.Frozen,
-      effectKind: Effect.Freeze,
-      noAlias: true,
-      transitiveMixedData: true,
-    },
-  ],
-  [
-    'usePaginationFragment',
-    {
-      valueKind: ValueKind.Frozen,
-      effectKind: Effect.Freeze,
-      noAlias: true,
-      transitiveMixedData: true,
-    },
-  ],
-  [
-    'useRefetchableFragment',
-    {
-      valueKind: ValueKind.Frozen,
-      effectKind: Effect.Freeze,
-      noAlias: true,
-      transitiveMixedData: true,
-    },
-  ],
-  [
-    'useLazyLoadQuery',
-    {
-      valueKind: ValueKind.Frozen,
-      effectKind: Effect.Freeze,
-      noAlias: true,
-      transitiveMixedData: true,
-    },
-  ],
-  [
-    'usePreloadedQuery',
-    {
-      valueKind: ValueKind.Frozen,
-      effectKind: Effect.Freeze,
-      noAlias: true,
-      transitiveMixedData: true,
-    },
-  ],
-];
-
-function parseOptions(
-  source: string,
-  mode: 'compiler' | 'linter',
-  configOverrides: string,
-): PluginOptions {
-  // Extract the first line to quickly check for custom test directives
-  const pragma = source.substring(0, source.indexOf('\n'));
-
-  const parsedPragmaOptions = parseConfigPragmaForTests(pragma, {
-    compilationMode: 'infer',
-    environment:
-      mode === 'linter'
-        ? {
-            // enabled in compiler
-            validateRefAccessDuringRender: false,
-            // enabled in linter
-            validateNoSetStateInRender: true,
-            validateNoSetStateInEffects: true,
-            validateNoJSXInTryStatements: true,
-            validateNoImpureFunctionsInRender: true,
-            validateStaticComponents: true,
-            validateNoFreezingKnownMutableFunctions: true,
-            validateNoVoidUseMemo: true,
-          }
-        : {
-            /* use defaults for compiler mode */
-          },
-  });
-
-  // Parse config overrides from config editor
-  let configOverrideOptions: any = {};
-  const configMatch = configOverrides.match(/^\s*import.*?\n\n\((.*)\)/s);
-  if (configOverrides.trim()) {
-    if (configMatch && configMatch[1]) {
-      const configString = configMatch[1].replace(/satisfies.*$/, '').trim();
-      configOverrideOptions = new Function(`return (${configString})`)();
-    } else {
-      throw new Error('Invalid override format');
-    }
-  }
-
-  const opts: PluginOptions = parsePluginOptions({
-    ...parsedPragmaOptions,
-    ...configOverrideOptions,
-    environment: {
-      ...parsedPragmaOptions.environment,
-      ...configOverrideOptions.environment,
-      customHooks: new Map([...COMMON_HOOKS]),
-    },
-  });
-
-  return opts;
-}
-
-export function compile(
-  source: string,
-  mode: 'compiler' | 'linter',
-  configOverrides: string,
-): [CompilerOutput, 'flow' | 'typescript', PluginOptions | null] {
-  const results = new Map<string, Array<PrintedCompilerPipelineValue>>();
-  const error = new CompilerError();
-  const otherErrors: Array<CompilerErrorDetail | CompilerDiagnostic> = [];
-  const upsert: (result: PrintedCompilerPipelineValue) => void = result => {
-    const entry = results.get(result.name);
-    if (Array.isArray(entry)) {
-      entry.push(result);
-    } else {
-      results.set(result.name, [result]);
-    }
-  };
-  let language: 'flow' | 'typescript';
-  if (source.match(/\@flow/)) {
-    language = 'flow';
-  } else {
-    language = 'typescript';
-  }
-  let transformOutput;
-
-  let baseOpts: PluginOptions | null = null;
-  try {
-    baseOpts = parseOptions(source, mode, configOverrides);
-  } catch (err) {
-    error.details.push(
-      new CompilerErrorDetail({
-        category: ErrorCategory.Config,
-        reason: `Unexpected failure when transforming configs! \n${err}`,
-        loc: null,
-        suggestions: null,
-      }),
-    );
-  }
-  if (baseOpts) {
-    try {
-      const logIR = (result: CompilerPipelineValue): void => {
-        switch (result.kind) {
-          case 'ast': {
-            break;
-          }
-          case 'hir': {
-            upsert({
-              kind: 'hir',
-              fnName: result.value.id,
-              name: result.name,
-              value: printFunctionWithOutlined(result.value),
-            });
-            break;
-          }
-          case 'reactive': {
-            upsert({
-              kind: 'reactive',
-              fnName: result.value.id,
-              name: result.name,
-              value: printReactiveFunctionWithOutlined(result.value),
-            });
-            break;
-          }
-          case 'debug': {
-            upsert({
-              kind: 'debug',
-              fnName: null,
-              name: result.name,
-              value: result.value,
-            });
-            break;
-          }
-          default: {
-            const _: never = result;
-            throw new Error(`Unhandled result ${result}`);
-          }
-        }
-      };
-      // Add logger options to the parsed options
-      const opts = {
-        ...baseOpts,
-        logger: {
-          debugLogIRs: logIR,
-          logEvent: (_filename: string | null, event: LoggerEvent): void => {
-            if (event.kind === 'CompileError') {
-              otherErrors.push(event.detail);
-            }
-          },
-        },
-      };
-      transformOutput = invokeCompiler(source, language, opts);
-    } catch (err) {
-      /**
-       * error might be an invariant violation or other runtime error
-       * (i.e. object shape that is not CompilerError)
-       */
-      if (err instanceof CompilerError && err.details.length > 0) {
-        error.merge(err);
-      } else {
-        /**
-         * Handle unexpected failures by logging (to get a stack trace)
-         * and reporting
-         */
-        error.details.push(
-          new CompilerErrorDetail({
-            category: ErrorCategory.Invariant,
-            reason: `Unexpected failure when transforming input! \n${err}`,
-            loc: null,
-            suggestions: null,
-          }),
-        );
-      }
-    }
-  }
-  // Only include logger errors if there weren't other errors
-  if (!error.hasErrors() && otherErrors.length !== 0) {
-    otherErrors.forEach(e => error.details.push(e));
-  }
-  if (error.hasErrors()) {
-    return [{kind: 'err', results, error}, language, baseOpts];
-  }
-  return [
-    {kind: 'ok', results, transformOutput, errors: error.details},
-    language,
-    baseOpts,
-  ];
-}

compiler/apps/playground/styles/globals.css

@@ -124,11 +124,3 @@
 ::view-transition-group(.expand-accordion) {
   overflow: clip;
 }
-
-/**
- * For some reason, the original Monaco editor is still visible to the
- * left of the DiffEditor. This is a workaround for better visual clarity.
- */
-.monaco-diff-editor .editor.original{
-  visibility: hidden !important;
-}

compiler/packages/babel-plugin-react-compiler/src/HIR/Environment.ts

@@ -210,7 +210,7 @@ export const EnvironmentConfigSchema = z.object({
    * that if a useEffect or useCallback references a function value, that function value will be
    * considered frozen, and in turn all of its referenced variables will be considered frozen as well.
    */
-  enablePreserveExistingMemoizationGuarantees: z.boolean().default(true),
+  enablePreserveExistingMemoizationGuarantees: z.boolean().default(false),
 
   /**
    * Validates that all useMemo/useCallback values are also memoized by Forget. This mode can be

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/allocating-primitive-as-dep.expect.md

@@ -2,7 +2,6 @@
 ## Input
 
 ```javascript
-// @enablePreserveExistingMemoizationGuarantees:false
 // bar(props.b) is an allocating expression that produces a primitive, which means
 // that Forget should memoize it.
 // Correctness:
@@ -17,8 +16,7 @@ function AllocatingPrimitiveAsDep(props) {
 ## Code
 
 ```javascript
-import { c as _c } from "react/compiler-runtime"; // @enablePreserveExistingMemoizationGuarantees:false
-// bar(props.b) is an allocating expression that produces a primitive, which means
+import { c as _c } from "react/compiler-runtime"; // bar(props.b) is an allocating expression that produces a primitive, which means
 // that Forget should memoize it.
 // Correctness:
 //   - y depends on either bar(props.b) or bar(props.b) + 1

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/allocating-primitive-as-dep.js

@@ -1,4 +1,3 @@
-// @enablePreserveExistingMemoizationGuarantees:false
 // bar(props.b) is an allocating expression that produces a primitive, which means
 // that Forget should memoize it.
 // Correctness:

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/allow-modify-global-in-callback-jsx.expect.md

@@ -2,7 +2,6 @@
 ## Input
 
 ```javascript
-// @enablePreserveExistingMemoizationGuarantees:false
 import {useMemo} from 'react';
 
 const someGlobal = {value: 0};
@@ -33,7 +32,7 @@ export const FIXTURE_ENTRYPOINT = {
 ## Code
 
 ```javascript
-import { c as _c } from "react/compiler-runtime"; // @enablePreserveExistingMemoizationGuarantees:false
+import { c as _c } from "react/compiler-runtime";
 import { useMemo } from "react";
 
 const someGlobal = { value: 0 };

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/allow-modify-global-in-callback-jsx.js

@@ -1,4 +1,3 @@
-// @enablePreserveExistingMemoizationGuarantees:false
 import {useMemo} from 'react';
 
 const someGlobal = {value: 0};

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/computed-load-primitive-as-dependency.expect.md

@@ -2,7 +2,6 @@
 ## Input
 
 ```javascript
-// @enablePreserveExistingMemoizationGuarantees:false
 function Component(props) {
   let a = foo();
   // freeze `a` so we know the next line cannot mutate it
@@ -18,7 +17,7 @@ function Component(props) {
 ## Code
 
 ```javascript
-import { c as _c } from "react/compiler-runtime"; // @enablePreserveExistingMemoizationGuarantees:false
+import { c as _c } from "react/compiler-runtime";
 function Component(props) {
   const $ = _c(2);
   const a = foo();

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/computed-load-primitive-as-dependency.js

@@ -1,4 +1,3 @@
-// @enablePreserveExistingMemoizationGuarantees:false
 function Component(props) {
   let a = foo();
   // freeze `a` so we know the next line cannot mutate it

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/constant-propagation-template-literal.expect.md

@@ -2,7 +2,6 @@
 ## Input
 
 ```javascript
-// @enablePreserveExistingMemoizationGuarantees:false
 import {Stringify, identity} from 'shared-runtime';
 
 function foo() {
@@ -65,7 +64,7 @@ export const FIXTURE_ENTRYPOINT = {
 ## Code
 
 ```javascript
-import { c as _c } from "react/compiler-runtime"; // @enablePreserveExistingMemoizationGuarantees:false
+import { c as _c } from "react/compiler-runtime";
 import { Stringify, identity } from "shared-runtime";
 
 function foo() {

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/constant-propagation-template-literal.js

@@ -1,4 +1,3 @@
-// @enablePreserveExistingMemoizationGuarantees:false
 import {Stringify, identity} from 'shared-runtime';
 
 function foo() {

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/context-variable-as-jsx-element-tag.expect.md

@@ -2,7 +2,6 @@
 ## Input
 
 ```javascript
-// @enablePreserveExistingMemoizationGuarantees:false
 import {useMemo} from 'react';
 import {Stringify} from 'shared-runtime';
 
@@ -26,7 +25,7 @@ export const FIXTURE_ENTRYPOINT = {
 ## Code
 
 ```javascript
-import { c as _c } from "react/compiler-runtime"; // @enablePreserveExistingMemoizationGuarantees:false
+import { c as _c } from "react/compiler-runtime";
 import { useMemo } from "react";
 import { Stringify } from "shared-runtime";
 

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/context-variable-as-jsx-element-tag.js

@@ -1,4 +1,3 @@
-// @enablePreserveExistingMemoizationGuarantees:false
 import {useMemo} from 'react';
 import {Stringify} from 'shared-runtime';
 

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/destructure-direct-reassignment.expect.md

@@ -2,7 +2,6 @@
 ## Input
 
 ```javascript
-// @enablePreserveExistingMemoizationGuarantees:false
 function foo(props) {
   let x, y;
   ({x, y} = {x: props.a, y: props.b});
@@ -22,7 +21,6 @@ export const FIXTURE_ENTRYPOINT = {
 ## Code
 
 ```javascript
-// @enablePreserveExistingMemoizationGuarantees:false
 function foo(props) {
   let x;
   let y;

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/destructure-direct-reassignment.js

@@ -1,4 +1,3 @@
-// @enablePreserveExistingMemoizationGuarantees:false
 function foo(props) {
   let x, y;
   ({x, y} = {x: props.a, y: props.b});

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/error.invalid-uncalled-function-capturing-mutable-values-memoizes-with-captures-values.expect.md

@@ -2,7 +2,7 @@
 ## Input
 
 ```javascript
-// @flow @enableNewMutationAliasingModel @enablePreserveExistingMemoizationGuarantees:false
+// @flow @enableNewMutationAliasingModel
 /**
  * This hook returns a function that when called with an input object,
  * will return the result of mapping that input with the supplied map

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/error.invalid-uncalled-function-capturing-mutable-values-memoizes-with-captures-values.js

@@ -1,4 +1,4 @@
-// @flow @enableNewMutationAliasingModel @enablePreserveExistingMemoizationGuarantees:false
+// @flow @enableNewMutationAliasingModel
 /**
  * This hook returns a function that when called with an input object,
  * will return the result of mapping that input with the supplied map

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/error.repro-preserve-memoization-inner-destructured-value-mistaken-as-dependency-later-mutation.expect.md

@@ -2,7 +2,7 @@
 ## Input
 
 ```javascript
-// @validatePreserveExistingMemoizationGuarantees @enablePreserveExistingMemoizationGuarantees:false
+// @validatePreserveExistingMemoizationGuarantees
 
 /**
  * Repro from https://github.com/facebook/react/issues/34262

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/error.repro-preserve-memoization-inner-destructured-value-mistaken-as-dependency-later-mutation.js

@@ -1,4 +1,4 @@
-// @validatePreserveExistingMemoizationGuarantees @enablePreserveExistingMemoizationGuarantees:false
+// @validatePreserveExistingMemoizationGuarantees
 
 /**
  * Repro from https://github.com/facebook/react/issues/34262

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/error.repro-preserve-memoization-inner-destructured-value-mistaken-as-dependency-mutated-dep.expect.md

@@ -2,7 +2,7 @@
 ## Input
 
 ```javascript
-// @validatePreserveExistingMemoizationGuarantees @enablePreserveExistingMemoizationGuarantees:false
+// @validatePreserveExistingMemoizationGuarantees
 
 import {identity, Stringify, useHook} from 'shared-runtime';
 

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/error.repro-preserve-memoization-inner-destructured-value-mistaken-as-dependency-mutated-dep.js

@@ -1,4 +1,4 @@
-// @validatePreserveExistingMemoizationGuarantees @enablePreserveExistingMemoizationGuarantees:false
+// @validatePreserveExistingMemoizationGuarantees
 
 import {identity, Stringify, useHook} from 'shared-runtime';
 

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/error.todo-repro-missed-memoization-from-capture-in-invoked-function-inferred-as-mutation.expect.md

@@ -2,7 +2,7 @@
 ## Input
 
 ```javascript
-// @flow @validatePreserveExistingMemoizationGuarantees @enablePreserveExistingMemoizationGuarantees:false
+// @flow @validatePreserveExistingMemoizationGuarantees
 import {useMemo} from 'react';
 import {logValue, useFragment, useHook, typedLog} from 'shared-runtime';
 

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/error.todo-repro-missed-memoization-from-capture-in-invoked-function-inferred-as-mutation.js

@@ -1,4 +1,4 @@
-// @flow @validatePreserveExistingMemoizationGuarantees @enablePreserveExistingMemoizationGuarantees:false
+// @flow @validatePreserveExistingMemoizationGuarantees
 import {useMemo} from 'react';
 import {logValue, useFragment, useHook, typedLog} from 'shared-runtime';
 

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/error.todo-repro-missed-memoization-from-inferred-mutation-in-logger.expect.md

@@ -2,7 +2,7 @@
 ## Input
 
 ```javascript
-// @flow @validatePreserveExistingMemoizationGuarantees @enablePreserveExistingMemoizationGuarantees:false
+// @flow @validatePreserveExistingMemoizationGuarantees
 import {useFragment} from 'react-relay';
 import LogEvent from 'LogEvent';
 import {useCallback, useMemo} from 'react';

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/error.todo-repro-missed-memoization-from-inferred-mutation-in-logger.js

@@ -1,4 +1,4 @@
-// @flow @validatePreserveExistingMemoizationGuarantees @enablePreserveExistingMemoizationGuarantees:false
+// @flow @validatePreserveExistingMemoizationGuarantees
 import {useFragment} from 'react-relay';
 import LogEvent from 'LogEvent';
 import {useCallback, useMemo} from 'react';

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/error.todo-repro-unmemoized-callback-captured-in-context-variable.expect.md

@@ -2,7 +2,7 @@
 ## Input
 
 ```javascript
-// @validatePreserveExistingMemoizationGuarantees @enablePreserveExistingMemoizationGuarantees:false
+// @validatePreserveExistingMemoizationGuarantees
 import {useMemo} from 'react';
 import {ValidateMemoization, useHook} from 'shared-runtime';
 

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/error.todo-repro-unmemoized-callback-captured-in-context-variable.tsx

@@ -1,4 +1,4 @@
-// @validatePreserveExistingMemoizationGuarantees @enablePreserveExistingMemoizationGuarantees:false
+// @validatePreserveExistingMemoizationGuarantees
 import {useMemo} from 'react';
 import {ValidateMemoization, useHook} from 'shared-runtime';
 

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/error.validate-object-entries-mutation.expect.md

@@ -2,7 +2,7 @@
 ## Input
 
 ```javascript
-// @validatePreserveExistingMemoizationGuarantees @enablePreserveExistingMemoizationGuarantees:false
+// @validatePreserveExistingMemoizationGuarantees
 import {makeObject_Primitives, Stringify} from 'shared-runtime';
 
 function Component(props) {

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/error.validate-object-entries-mutation.js

@@ -1,4 +1,4 @@
-// @validatePreserveExistingMemoizationGuarantees @enablePreserveExistingMemoizationGuarantees:false
+// @validatePreserveExistingMemoizationGuarantees
 import {makeObject_Primitives, Stringify} from 'shared-runtime';
 
 function Component(props) {

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/error.validate-object-values-mutation.expect.md

@@ -2,7 +2,7 @@
 ## Input
 
 ```javascript
-// @validatePreserveExistingMemoizationGuarantees @enablePreserveExistingMemoizationGuarantees:false
+// @validatePreserveExistingMemoizationGuarantees
 import {makeObject_Primitives, Stringify} from 'shared-runtime';
 
 function Component(props) {

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/error.validate-object-values-mutation.js

@@ -1,4 +1,4 @@
-// @validatePreserveExistingMemoizationGuarantees @enablePreserveExistingMemoizationGuarantees:false
+// @validatePreserveExistingMemoizationGuarantees
 import {makeObject_Primitives, Stringify} from 'shared-runtime';
 
 function Component(props) {

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/existing-variables-with-c-name.expect.md

@@ -2,7 +2,6 @@
 ## Input
 
 ```javascript
-// @enablePreserveExistingMemoizationGuarantees:false
 import {useMemo, useState} from 'react';
 import {ValidateMemoization} from 'shared-runtime';
 
@@ -29,7 +28,7 @@ export const FIXTURE_ENTRYPOINT = {
 ## Code
 
 ```javascript
-import { c as _c2 } from "react/compiler-runtime"; // @enablePreserveExistingMemoizationGuarantees:false
+import { c as _c2 } from "react/compiler-runtime";
 import { useMemo, useState } from "react";
 import { ValidateMemoization } from "shared-runtime";
 

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/existing-variables-with-c-name.js

@@ -1,4 +1,3 @@
-// @enablePreserveExistingMemoizationGuarantees:false
 import {useMemo, useState} from 'react';
 import {ValidateMemoization} from 'shared-runtime';
 

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/fbt/bug-fbt-plural-multiple-function-calls.expect.md

@@ -2,7 +2,6 @@
 ## Input
 
 ```javascript
-// @enablePreserveExistingMemoizationGuarantees:false
 import fbt from 'fbt';
 
 /**
@@ -36,7 +35,7 @@ export const FIXTURE_ENTRYPOINT = {
 ## Code
 
 ```javascript
-import { c as _c } from "react/compiler-runtime"; // @enablePreserveExistingMemoizationGuarantees:false
+import { c as _c } from "react/compiler-runtime";
 import fbt from "fbt";
 
 /**

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/fbt/bug-fbt-plural-multiple-function-calls.ts

@@ -1,4 +1,3 @@
-// @enablePreserveExistingMemoizationGuarantees:false
 import fbt from 'fbt';
 
 /**

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/for-in-statement-type-inference.expect.md

@@ -2,7 +2,6 @@
 ## Input
 
 ```javascript
-// @enablePreserveExistingMemoizationGuarantees:false
 const {identity, mutate} = require('shared-runtime');
 
 function Component(props) {
@@ -25,7 +24,6 @@ export const FIXTURE_ENTRYPOINT = {
 ## Code
 
 ```javascript
-// @enablePreserveExistingMemoizationGuarantees:false
 const { identity, mutate } = require("shared-runtime");
 
 function Component(props) {

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/for-in-statement-type-inference.js

@@ -1,4 +1,3 @@
-// @enablePreserveExistingMemoizationGuarantees:false
 const {identity, mutate} = require('shared-runtime');
 
 function Component(props) {

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/hooks-with-prefix.expect.md

@@ -2,7 +2,7 @@
 ## Input
 
 ```javascript
-// @hookPattern:".*\b(use[^$]+)$" @enablePreserveExistingMemoizationGuarantees:false
+// @hookPattern:".*\b(use[^$]+)$"
 
 import * as React from 'react';
 import {makeArray, useHook} from 'shared-runtime';
@@ -36,7 +36,7 @@ export const FIXTURE_ENTRYPOINT = {
 ## Code
 
 ```javascript
-import { c as _c } from "react/compiler-runtime"; // @hookPattern:".*\b(use[^$]+)$" @enablePreserveExistingMemoizationGuarantees:false
+import { c as _c } from "react/compiler-runtime"; // @hookPattern:".*\b(use[^$]+)$"
 
 import * as React from "react";
 import { makeArray, useHook } from "shared-runtime";

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/hooks-with-prefix.js

@@ -1,4 +1,4 @@
-// @hookPattern:".*\b(use[^$]+)$" @enablePreserveExistingMemoizationGuarantees:false
+// @hookPattern:".*\b(use[^$]+)$"
 
 import * as React from 'react';
 import {makeArray, useHook} from 'shared-runtime';

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/infer-computed-delete.expect.md

@@ -2,7 +2,7 @@
 ## Input
 
 ```javascript
-// @debug @enablePreserveExistingMemoizationGuarantees:false
+// @debug
 function Component(props) {
   const x = makeObject();
   const y = delete x[props.value];
@@ -14,7 +14,7 @@ function Component(props) {
 ## Code
 
 ```javascript
-// @debug @enablePreserveExistingMemoizationGuarantees:false
+// @debug
 function Component(props) {
   const x = makeObject();
   const y = delete x[props.value];

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/infer-computed-delete.js

@@ -1,4 +1,4 @@
-// @debug @enablePreserveExistingMemoizationGuarantees:false
+// @debug
 function Component(props) {
   const x = makeObject();
   const y = delete x[props.value];

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/infer-property-delete.expect.md

@@ -2,7 +2,6 @@
 ## Input
 
 ```javascript
-// @enablePreserveExistingMemoizationGuarantees:false
 function Component(props) {
   const x = makeObject();
   const y = delete x.value;
@@ -14,7 +13,6 @@ function Component(props) {
 ## Code
 
 ```javascript
-// @enablePreserveExistingMemoizationGuarantees:false
 function Component(props) {
   const x = makeObject();
   const y = delete x.value;

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/infer-property-delete.js

@@ -1,4 +1,3 @@
-// @enablePreserveExistingMemoizationGuarantees:false
 function Component(props) {
   const x = makeObject();
   const y = delete x.value;

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/error.invalid-useCallback-captures-reassigned-context.expect.md

@@ -2,7 +2,7 @@
 ## Input
 
 ```javascript
-// @validatePreserveExistingMemoizationGuarantees @enableNewMutationAliasingModel @enablePreserveExistingMemoizationGuarantees:false
+// @validatePreserveExistingMemoizationGuarantees @enableNewMutationAliasingModel
 import {useCallback} from 'react';
 import {makeArray} from 'shared-runtime';
 

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/error.invalid-useCallback-captures-reassigned-context.js

@@ -1,4 +1,4 @@
-// @validatePreserveExistingMemoizationGuarantees @enableNewMutationAliasingModel @enablePreserveExistingMemoizationGuarantees:false
+// @validatePreserveExistingMemoizationGuarantees @enableNewMutationAliasingModel
 import {useCallback} from 'react';
 import {makeArray} from 'shared-runtime';
 

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/mutate-through-identity-function-expression.expect.md

@@ -2,7 +2,6 @@
 ## Input
 
 ```javascript
-// @enablePreserveExistingMemoizationGuarantees:false
 import {useMemo} from 'react';
 import {identity, ValidateMemoization} from 'shared-runtime';
 
@@ -33,7 +32,7 @@ export const FIXTURE_ENTRYPOINT = {
 ## Code
 
 ```javascript
-import { c as _c } from "react/compiler-runtime"; // @enablePreserveExistingMemoizationGuarantees:false
+import { c as _c } from "react/compiler-runtime";
 import { useMemo } from "react";
 import { identity, ValidateMemoization } from "shared-runtime";
 

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/mutate-through-identity-function-expression.js

@@ -1,4 +1,3 @@
-// @enablePreserveExistingMemoizationGuarantees:false
 import {useMemo} from 'react';
 import {identity, ValidateMemoization} from 'shared-runtime';
 

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/mutate-through-identity.expect.md

@@ -2,7 +2,6 @@
 ## Input
 
 ```javascript
-// @enablePreserveExistingMemoizationGuarantees:false
 import {useMemo} from 'react';
 import {identity, ValidateMemoization} from 'shared-runtime';
 
@@ -30,7 +29,7 @@ export const FIXTURE_ENTRYPOINT = {
 ## Code
 
 ```javascript
-import { c as _c } from "react/compiler-runtime"; // @enablePreserveExistingMemoizationGuarantees:false
+import { c as _c } from "react/compiler-runtime";
 import { useMemo } from "react";
 import { identity, ValidateMemoization } from "shared-runtime";
 

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/mutate-through-identity.js

@@ -1,4 +1,3 @@
-// @enablePreserveExistingMemoizationGuarantees:false
 import {useMemo} from 'react';
 import {identity, ValidateMemoization} from 'shared-runtime';
 

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/todo-control-flow-sensitive-mutation.expect.md

@@ -2,7 +2,6 @@
 ## Input
 
 ```javascript
-// @enablePreserveExistingMemoizationGuarantees:false
 import {useMemo} from 'react';
 import {
   mutate,
@@ -50,7 +49,7 @@ export const FIXTURE_ENTRYPOINT = {
 ## Code
 
 ```javascript
-import { c as _c } from "react/compiler-runtime"; // @enablePreserveExistingMemoizationGuarantees:false
+import { c as _c } from "react/compiler-runtime";
 import { useMemo } from "react";
 import {
   mutate,

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/todo-control-flow-sensitive-mutation.tsx

@@ -1,4 +1,3 @@
-// @enablePreserveExistingMemoizationGuarantees:false
 import {useMemo} from 'react';
 import {
   mutate,

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/todo-transitivity-createfrom-capture-lambda.expect.md

@@ -2,7 +2,6 @@
 ## Input
 
 ```javascript
-// @enablePreserveExistingMemoizationGuarantees:false
 import {useMemo} from 'react';
 import {
   typedCapture,
@@ -42,7 +41,7 @@ export const FIXTURE_ENTRYPOINT = {
 ## Code
 
 ```javascript
-import { c as _c } from "react/compiler-runtime"; // @enablePreserveExistingMemoizationGuarantees:false
+import { c as _c } from "react/compiler-runtime";
 import { useMemo } from "react";
 import {
   typedCapture,

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/todo-transitivity-createfrom-capture-lambda.tsx

@@ -1,4 +1,3 @@
-// @enablePreserveExistingMemoizationGuarantees:false
 import {useMemo} from 'react';
 import {
   typedCapture,

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/transitivity-add-captured-array-to-itself.expect.md

@@ -2,7 +2,6 @@
 ## Input
 
 ```javascript
-// @enablePreserveExistingMemoizationGuarantees:false
 import {useMemo} from 'react';
 import {
   typedCapture,
@@ -43,7 +42,7 @@ export const FIXTURE_ENTRYPOINT = {
 ## Code
 
 ```javascript
-import { c as _c } from "react/compiler-runtime"; // @enablePreserveExistingMemoizationGuarantees:false
+import { c as _c } from "react/compiler-runtime";
 import { useMemo } from "react";
 import {
   typedCapture,

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/transitivity-add-captured-array-to-itself.tsx

@@ -1,4 +1,3 @@
-// @enablePreserveExistingMemoizationGuarantees:false
 import {useMemo} from 'react';
 import {
   typedCapture,

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/transitivity-capture-createfrom-lambda.expect.md

@@ -2,7 +2,6 @@
 ## Input
 
 ```javascript
-// @enablePreserveExistingMemoizationGuarantees:false
 import {useMemo} from 'react';
 import {
   typedCapture,
@@ -41,7 +40,7 @@ export const FIXTURE_ENTRYPOINT = {
 ## Code
 
 ```javascript
-import { c as _c } from "react/compiler-runtime"; // @enablePreserveExistingMemoizationGuarantees:false
+import { c as _c } from "react/compiler-runtime";
 import { useMemo } from "react";
 import {
   typedCapture,

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/transitivity-capture-createfrom-lambda.tsx

@@ -1,4 +1,3 @@
-// @enablePreserveExistingMemoizationGuarantees:false
 import {useMemo} from 'react';
 import {
   typedCapture,

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/transitivity-capture-createfrom.expect.md

@@ -2,7 +2,6 @@
 ## Input
 
 ```javascript
-// @enablePreserveExistingMemoizationGuarantees:false
 import {useMemo} from 'react';
 import {
   typedCapture,
@@ -37,7 +36,7 @@ export const FIXTURE_ENTRYPOINT = {
 ## Code
 
 ```javascript
-import { c as _c } from "react/compiler-runtime"; // @enablePreserveExistingMemoizationGuarantees:false
+import { c as _c } from "react/compiler-runtime";
 import { useMemo } from "react";
 import {
   typedCapture,

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/transitivity-capture-createfrom.tsx

@@ -1,4 +1,3 @@
-// @enablePreserveExistingMemoizationGuarantees:false
 import {useMemo} from 'react';
 import {
   typedCapture,

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/transitivity-phi-assign-or-capture.expect.md

@@ -2,7 +2,6 @@
 ## Input
 
 ```javascript
-// @enablePreserveExistingMemoizationGuarantees:false
 import {useMemo} from 'react';
 import {
   typedCapture,
@@ -41,7 +40,7 @@ export const FIXTURE_ENTRYPOINT = {
 ## Code
 
 ```javascript
-import { c as _c } from "react/compiler-runtime"; // @enablePreserveExistingMemoizationGuarantees:false
+import { c as _c } from "react/compiler-runtime";
 import { useMemo } from "react";
 import {
   typedCapture,

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/transitivity-phi-assign-or-capture.tsx

@@ -1,4 +1,3 @@
-// @enablePreserveExistingMemoizationGuarantees:false
 import {useMemo} from 'react';
 import {
   typedCapture,

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/useCallback-reordering-deplist-controlflow.expect.md

@@ -2,7 +2,7 @@
 ## Input
 
 ```javascript
-// @enableNewMutationAliasingModel @enablePreserveExistingMemoizationGuarantees:false
+// @enableNewMutationAliasingModel
 import {useCallback} from 'react';
 import {Stringify} from 'shared-runtime';
 
@@ -36,7 +36,7 @@ export const FIXTURE_ENTRYPOINT = {
 ## Code
 
 ```javascript
-import { c as _c } from "react/compiler-runtime"; // @enableNewMutationAliasingModel @enablePreserveExistingMemoizationGuarantees:false
+import { c as _c } from "react/compiler-runtime"; // @enableNewMutationAliasingModel
 import { useCallback } from "react";
 import { Stringify } from "shared-runtime";
 

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/useCallback-reordering-deplist-controlflow.tsx

@@ -1,4 +1,4 @@
-// @enableNewMutationAliasingModel @enablePreserveExistingMemoizationGuarantees:false
+// @enableNewMutationAliasingModel
 import {useCallback} from 'react';
 import {Stringify} from 'shared-runtime';
 

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/useCallback-reordering-depslist-assignment.expect.md

@@ -2,7 +2,7 @@
 ## Input
 
 ```javascript
-// @enableNewMutationAliasingModel @enablePreserveExistingMemoizationGuarantees:false
+// @enableNewMutationAliasingModel
 import {useCallback} from 'react';
 import {Stringify} from 'shared-runtime';
 
@@ -31,7 +31,7 @@ export const FIXTURE_ENTRYPOINT = {
 ## Code
 
 ```javascript
-import { c as _c } from "react/compiler-runtime"; // @enableNewMutationAliasingModel @enablePreserveExistingMemoizationGuarantees:false
+import { c as _c } from "react/compiler-runtime"; // @enableNewMutationAliasingModel
 import { useCallback } from "react";
 import { Stringify } from "shared-runtime";
 

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/useCallback-reordering-depslist-assignment.tsx

@@ -1,4 +1,4 @@
-// @enableNewMutationAliasingModel @enablePreserveExistingMemoizationGuarantees:false
+// @enableNewMutationAliasingModel
 import {useCallback} from 'react';
 import {Stringify} from 'shared-runtime';
 

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/useMemo-reordering-depslist-assignment.expect.md

@@ -2,7 +2,7 @@
 ## Input
 
 ```javascript
-// @enableNewMutationAliasingModel @enablePreserveExistingMemoizationGuarantees:false
+// @enableNewMutationAliasingModel
 import {useMemo} from 'react';
 
 function useFoo(arr1, arr2) {
@@ -27,7 +27,7 @@ export const FIXTURE_ENTRYPOINT = {
 ## Code
 
 ```javascript
-import { c as _c } from "react/compiler-runtime"; // @enableNewMutationAliasingModel @enablePreserveExistingMemoizationGuarantees:false
+import { c as _c } from "react/compiler-runtime"; // @enableNewMutationAliasingModel
 import { useMemo } from "react";
 
 function useFoo(arr1, arr2) {

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/new-mutability/useMemo-reordering-depslist-assignment.ts

@@ -1,4 +1,4 @@
-// @enableNewMutationAliasingModel @enablePreserveExistingMemoizationGuarantees:false
+// @enableNewMutationAliasingModel
 import {useMemo} from 'react';
 
 function useFoo(arr1, arr2) {

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/preserve-memo-validation/error.false-positive-useMemo-infer-mutate-deps.expect.md

@@ -2,7 +2,7 @@
 ## Input
 
 ```javascript
-// @validatePreserveExistingMemoizationGuarantees @enablePreserveExistingMemoizationGuarantees:false
+// @validatePreserveExistingMemoizationGuarantees
 import {useMemo} from 'react';
 import {identity} from 'shared-runtime';
 

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/preserve-memo-validation/error.false-positive-useMemo-infer-mutate-deps.ts

@@ -1,4 +1,4 @@
-// @validatePreserveExistingMemoizationGuarantees @enablePreserveExistingMemoizationGuarantees:false
+// @validatePreserveExistingMemoizationGuarantees
 import {useMemo} from 'react';
 import {identity} from 'shared-runtime';
 

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/preserve-memo-validation/error.hoist-useCallback-conditional-access-own-scope.expect.md

@@ -2,7 +2,7 @@
 ## Input
 
 ```javascript
-// @validatePreserveExistingMemoizationGuarantees @enablePreserveExistingMemoizationGuarantees:false
+// @validatePreserveExistingMemoizationGuarantees
 import {useCallback} from 'react';
 
 function Component({propA, propB}) {

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/preserve-memo-validation/error.hoist-useCallback-conditional-access-own-scope.ts

@@ -1,4 +1,4 @@
-// @validatePreserveExistingMemoizationGuarantees @enablePreserveExistingMemoizationGuarantees:false
+// @validatePreserveExistingMemoizationGuarantees
 import {useCallback} from 'react';
 
 function Component({propA, propB}) {

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/preserve-memo-validation/error.hoist-useCallback-infer-conditional-value-block.expect.md

@@ -2,7 +2,7 @@
 ## Input
 
 ```javascript
-// @validatePreserveExistingMemoizationGuarantees @enablePreserveExistingMemoizationGuarantees:false
+// @validatePreserveExistingMemoizationGuarantees
 import {useCallback} from 'react';
 import {identity, mutate} from 'shared-runtime';
 

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/preserve-memo-validation/error.hoist-useCallback-infer-conditional-value-block.ts

@@ -1,4 +1,4 @@
-// @validatePreserveExistingMemoizationGuarantees @enablePreserveExistingMemoizationGuarantees:false
+// @validatePreserveExistingMemoizationGuarantees
 import {useCallback} from 'react';
 import {identity, mutate} from 'shared-runtime';
 

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/preserve-memo-validation/error.invalid-useCallback-captures-reassigned-context.expect.md

@@ -2,7 +2,7 @@
 ## Input
 
 ```javascript
-// @validatePreserveExistingMemoizationGuarantees @enablePreserveExistingMemoizationGuarantees:false
+// @validatePreserveExistingMemoizationGuarantees
 
 import {useCallback} from 'react';
 import {makeArray} from 'shared-runtime';

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/preserve-memo-validation/error.invalid-useCallback-captures-reassigned-context.ts

@@ -1,4 +1,4 @@
-// @validatePreserveExistingMemoizationGuarantees @enablePreserveExistingMemoizationGuarantees:false
+// @validatePreserveExistingMemoizationGuarantees
 
 import {useCallback} from 'react';
 import {makeArray} from 'shared-runtime';

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/preserve-memo-validation/error.useCallback-conditional-access-noAlloc.expect.md

@@ -2,7 +2,7 @@
 ## Input
 
 ```javascript
-// @validatePreserveExistingMemoizationGuarantees @enablePreserveExistingMemoizationGuarantees:false
+// @validatePreserveExistingMemoizationGuarantees
 import {useCallback} from 'react';
 
 function Component({propA, propB}) {

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/preserve-memo-validation/error.useCallback-conditional-access-noAlloc.ts

@@ -1,4 +1,4 @@
-// @validatePreserveExistingMemoizationGuarantees @enablePreserveExistingMemoizationGuarantees:false
+// @validatePreserveExistingMemoizationGuarantees
 import {useCallback} from 'react';
 
 function Component({propA, propB}) {

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/preserve-memo-validation/error.useCallback-infer-less-specific-conditional-access.expect.md

@@ -2,7 +2,7 @@
 ## Input
 
 ```javascript
-// @validatePreserveExistingMemoizationGuarantees @enablePreserveExistingMemoizationGuarantees:false
+// @validatePreserveExistingMemoizationGuarantees
 import {useCallback} from 'react';
 import {mutate} from 'shared-runtime';
 

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/preserve-memo-validation/error.useCallback-infer-less-specific-conditional-access.ts

@@ -1,4 +1,4 @@
-// @validatePreserveExistingMemoizationGuarantees @enablePreserveExistingMemoizationGuarantees:false
+// @validatePreserveExistingMemoizationGuarantees
 import {useCallback} from 'react';
 import {mutate} from 'shared-runtime';
 

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/preserve-memo-validation/error.useMemo-infer-less-specific-conditional-access.expect.md

@@ -2,7 +2,7 @@
 ## Input
 
 ```javascript
-// @validatePreserveExistingMemoizationGuarantees @enablePreserveExistingMemoizationGuarantees:false
+// @validatePreserveExistingMemoizationGuarantees
 import {useMemo} from 'react';
 import {mutate} from 'shared-runtime';
 

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/preserve-memo-validation/error.useMemo-infer-less-specific-conditional-access.ts

@@ -1,4 +1,4 @@
-// @validatePreserveExistingMemoizationGuarantees @enablePreserveExistingMemoizationGuarantees:false
+// @validatePreserveExistingMemoizationGuarantees
 import {useMemo} from 'react';
 import {mutate} from 'shared-runtime';
 

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/preserve-memo-validation/error.useMemo-infer-less-specific-conditional-value-block.expect.md

@@ -2,7 +2,7 @@
 ## Input
 
 ```javascript
-// @validatePreserveExistingMemoizationGuarantees @enablePreserveExistingMemoizationGuarantees:false
+// @validatePreserveExistingMemoizationGuarantees
 import {useMemo} from 'react';
 import {identity, mutate} from 'shared-runtime';
 

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/preserve-memo-validation/error.useMemo-infer-less-specific-conditional-value-block.ts

@@ -1,4 +1,4 @@
-// @validatePreserveExistingMemoizationGuarantees @enablePreserveExistingMemoizationGuarantees:false
+// @validatePreserveExistingMemoizationGuarantees
 import {useMemo} from 'react';
 import {identity, mutate} from 'shared-runtime';
 

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/preserve-memo-validation/useCallback-reordering-deplist-controlflow.expect.md

@@ -2,7 +2,6 @@
 ## Input
 
 ```javascript
-// @enablePreserveExistingMemoizationGuarantees:false
 import {useCallback} from 'react';
 import {Stringify} from 'shared-runtime';
 
@@ -36,7 +35,7 @@ export const FIXTURE_ENTRYPOINT = {
 ## Code
 
 ```javascript
-import { c as _c } from "react/compiler-runtime"; // @enablePreserveExistingMemoizationGuarantees:false
+import { c as _c } from "react/compiler-runtime";
 import { useCallback } from "react";
 import { Stringify } from "shared-runtime";
 

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/preserve-memo-validation/useCallback-reordering-deplist-controlflow.tsx

@@ -1,4 +1,3 @@
-// @enablePreserveExistingMemoizationGuarantees:false
 import {useCallback} from 'react';
 import {Stringify} from 'shared-runtime';
 

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/preserve-memo-validation/useCallback-reordering-depslist-assignment.expect.md

@@ -2,7 +2,6 @@
 ## Input
 
 ```javascript
-// @enablePreserveExistingMemoizationGuarantees:false
 import {useCallback} from 'react';
 import {Stringify} from 'shared-runtime';
 
@@ -31,7 +30,7 @@ export const FIXTURE_ENTRYPOINT = {
 ## Code
 
 ```javascript
-import { c as _c } from "react/compiler-runtime"; // @enablePreserveExistingMemoizationGuarantees:false
+import { c as _c } from "react/compiler-runtime";
 import { useCallback } from "react";
 import { Stringify } from "shared-runtime";
 

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/preserve-memo-validation/useCallback-reordering-depslist-assignment.tsx

@@ -1,4 +1,3 @@
-// @enablePreserveExistingMemoizationGuarantees:false
 import {useCallback} from 'react';
 import {Stringify} from 'shared-runtime';
 

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/preserve-memo-validation/useMemo-reordering-depslist-assignment.expect.md

@@ -2,7 +2,6 @@
 ## Input
 
 ```javascript
-// @enablePreserveExistingMemoizationGuarantees:false
 import {useMemo} from 'react';
 
 function useFoo(arr1, arr2) {
@@ -27,7 +26,7 @@ export const FIXTURE_ENTRYPOINT = {
 ## Code
 
 ```javascript
-import { c as _c } from "react/compiler-runtime"; // @enablePreserveExistingMemoizationGuarantees:false
+import { c as _c } from "react/compiler-runtime";
 import { useMemo } from "react";
 
 function useFoo(arr1, arr2) {

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/preserve-memo-validation/useMemo-reordering-depslist-assignment.ts

@@ -1,4 +1,3 @@
-// @enablePreserveExistingMemoizationGuarantees:false
 import {useMemo} from 'react';
 
 function useFoo(arr1, arr2) {

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/preserve-memo-validation/useMemo-reordering-depslist-controlflow.expect.md

@@ -2,7 +2,6 @@
 ## Input
 
 ```javascript
-// @enablePreserveExistingMemoizationGuarantees:false
 import {useMemo} from 'react';
 import {Stringify} from 'shared-runtime';
 
@@ -36,7 +35,7 @@ export const FIXTURE_ENTRYPOINT = {
 ## Code
 
 ```javascript
-import { c as _c } from "react/compiler-runtime"; // @enablePreserveExistingMemoizationGuarantees:false
+import { c as _c } from "react/compiler-runtime";
 import { useMemo } from "react";
 import { Stringify } from "shared-runtime";
 

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/preserve-memo-validation/useMemo-reordering-depslist-controlflow.tsx

@@ -1,4 +1,3 @@
-// @enablePreserveExistingMemoizationGuarantees:false
 import {useMemo} from 'react';
 import {Stringify} from 'shared-runtime';
 

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/repro-no-declarations-in-reactive-scope-with-early-return.expect.md

@@ -2,7 +2,7 @@
 ## Input
 
 ```javascript
-// @enableAssumeHooksFollowRulesOfReact @enableTransitivelyFreezeFunctionExpressions @enablePreserveExistingMemoizationGuarantees:false
+// @enableAssumeHooksFollowRulesOfReact @enableTransitivelyFreezeFunctionExpressions
 function Component() {
   const items = useItems();
   const filteredItems = useMemo(
@@ -37,7 +37,7 @@ function Component() {
 ## Code
 
 ```javascript
-import { c as _c } from "react/compiler-runtime"; // @enableAssumeHooksFollowRulesOfReact @enableTransitivelyFreezeFunctionExpressions @enablePreserveExistingMemoizationGuarantees:false
+import { c as _c } from "react/compiler-runtime"; // @enableAssumeHooksFollowRulesOfReact @enableTransitivelyFreezeFunctionExpressions
 function Component() {
   const $ = _c(6);
   const items = useItems();

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/repro-no-declarations-in-reactive-scope-with-early-return.js

@@ -1,4 +1,4 @@
-// @enableAssumeHooksFollowRulesOfReact @enableTransitivelyFreezeFunctionExpressions @enablePreserveExistingMemoizationGuarantees:false
+// @enableAssumeHooksFollowRulesOfReact @enableTransitivelyFreezeFunctionExpressions
 function Component() {
   const items = useItems();
   const filteredItems = useMemo(

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/repro-renaming-conflicting-decls.expect.md

@@ -2,7 +2,6 @@
 ## Input
 
 ```javascript
-// @enablePreserveExistingMemoizationGuarantees:false
 import {Stringify, identity, makeArray, toJSON} from 'shared-runtime';
 import {useMemo} from 'react';
 
@@ -41,7 +40,7 @@ export const FIXTURE_ENTRYPOINT = {
 ## Code
 
 ```javascript
-import { c as _c } from "react/compiler-runtime"; // @enablePreserveExistingMemoizationGuarantees:false
+import { c as _c } from "react/compiler-runtime";
 import { Stringify, identity, makeArray, toJSON } from "shared-runtime";
 import { useMemo } from "react";
 

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/repro-renaming-conflicting-decls.js

@@ -1,4 +1,3 @@
-// @enablePreserveExistingMemoizationGuarantees:false
 import {Stringify, identity, makeArray, toJSON} from 'shared-runtime';
 import {useMemo} from 'react';