diff --git a/.prettierrc.js b/.prettierrc.js
index 37cf9c9d3a89b..aa54cbae1f9f8 100644
--- a/.prettierrc.js
+++ b/.prettierrc.js
@@ -3,13 +3,12 @@
 const {esNextPaths} = require('./scripts/shared/pathsByLanguageVersion');
 
 module.exports = {
-  plugins: ['prettier-plugin-hermes-parser'],
   bracketSpacing: false,
   singleQuote: true,
   bracketSameLine: true,
   trailingComma: 'es5',
   printWidth: 80,
-  parser: 'hermes',
+  parser: 'flow',
   arrowParens: 'avoid',
   overrides: [
     {
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/ternary-expression.expect.md b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/ternary-expression.expect.md
index 171a57f3ea5ed..6e99be2e6f4cc 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/ternary-expression.expect.md
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/ternary-expression.expect.md
@@ -3,7 +3,7 @@
 
 ```javascript
 function ternary(props) {
-  const a = props.a && props.b ? props.c || props.d : props.e ?? props.f;
+  const a = props.a && props.b ? props.c || props.d : (props.e ?? props.f);
   const b = props.a ? (props.b && props.c ? props.d : props.e) : props.f;
   return a ? b : null;
 }
diff --git a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/ternary-expression.js b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/ternary-expression.js
index 8a741ccb12f25..2a39d90bbcd6d 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/ternary-expression.js
+++ b/compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/ternary-expression.js
@@ -1,5 +1,5 @@
 function ternary(props) {
-  const a = props.a && props.b ? props.c || props.d : props.e ?? props.f;
+  const a = props.a && props.b ? props.c || props.d : (props.e ?? props.f);
   const b = props.a ? (props.b && props.c ? props.d : props.e) : props.f;
   return a ? b : null;
 }
diff --git a/package.json b/package.json
index 875986ebdaf6a..6ad9211568541 100644
--- a/package.json
+++ b/package.json
@@ -91,7 +91,6 @@
     "ncp": "^2.0.0",
     "prettier": "^3.3.3",
     "prettier-2": "npm:prettier@^2",
-    "prettier-plugin-hermes-parser": "^0.23.0",
     "pretty-format": "^29.4.1",
     "prop-types": "^15.6.2",
     "random-seed": "^0.3.0",
diff --git a/packages/react-devtools-shared/src/devtools/ContextMenu/types.js b/packages/react-devtools-shared/src/devtools/ContextMenu/types.js
index c2f296db10fe5..9fda9be199941 100644
--- a/packages/react-devtools-shared/src/devtools/ContextMenu/types.js
+++ b/packages/react-devtools-shared/src/devtools/ContextMenu/types.js
@@ -25,7 +25,7 @@ export type ContextMenuHandle = {
   hide(): void,
 };
 
-/*::
-export type ContextMenuComponent = component(ref: React$RefSetter<ContextMenuHandle>);
-*/
+export type ContextMenuComponent = component(
+  ref: React$RefSetter<ContextMenuHandle>,
+);
 export type ContextMenuRef = {current: ContextMenuHandle | null};
diff --git a/packages/react-devtools-shared/src/hooks/astUtils.js b/packages/react-devtools-shared/src/hooks/astUtils.js
index d2d2088349e0c..13adcc0e36639 100644
--- a/packages/react-devtools-shared/src/hooks/astUtils.js
+++ b/packages/react-devtools-shared/src/hooks/astUtils.js
@@ -289,7 +289,7 @@ function getHookVariableName(
   const nodeType = hook.node.id.type;
   switch (nodeType) {
     case AST_NODE_TYPES.ARRAY_PATTERN:
-      return !isCustomHook ? hook.node.id.elements[0]?.name ?? null : null;
+      return !isCustomHook ? (hook.node.id.elements[0]?.name ?? null) : null;
 
     case AST_NODE_TYPES.IDENTIFIER:
       return hook.node.id.name;
diff --git a/packages/react-noop-renderer/src/createReactNoop.js b/packages/react-noop-renderer/src/createReactNoop.js
index 6fbad9adac195..37d3e5fd12a11 100644
--- a/packages/react-noop-renderer/src/createReactNoop.js
+++ b/packages/react-noop-renderer/src/createReactNoop.js
@@ -253,7 +253,7 @@ function createReactNoop(reconciler: Function, useMutation: boolean) {
       id: instance.id,
       type: type,
       parent: instance.parent,
-      children: keepChildren ? instance.children : children ?? [],
+      children: keepChildren ? instance.children : (children ?? []),
       text: shouldSetTextContent(type, newProps)
         ? computeText((newProps.children: any) + '', instance.context)
         : null,
diff --git a/scripts/flow/config/flowconfig b/scripts/flow/config/flowconfig
index bd5092f1580a8..5fa574b50f74c 100644
--- a/scripts/flow/config/flowconfig
+++ b/scripts/flow/config/flowconfig
@@ -14,8 +14,6 @@
 .*/__mocks__/.*
 .*/__tests__/.*
 
-# contains modern flow syntax that requires a Flow upgrade
-.*/node_modules/prettier-plugin-hermes-parser/.*
 
 # TODO: noop should get its own inlinedHostConfig entry
 .*/packages/react-noop-renderer/.*
diff --git a/yarn.lock b/yarn.lock
index 0496eb7844560..c2780d78f0ac5 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -9975,11 +9975,6 @@ hermes-eslint@^0.25.1:
     hermes-estree "0.25.1"
     hermes-parser "0.25.1"
 
-hermes-estree@0.23.0:
-  version "0.23.0"
-  resolved "https://registry.yarnpkg.com/hermes-estree/-/hermes-estree-0.23.0.tgz#89c5419877b9d6bce4bb616821f496f5c5daddbc"
-  integrity sha512-Rkp0PNLGpORw4ktsttkVbpYJbrYKS3hAnkxu8D9nvQi6LvSbuPa+tYw/t2u3Gjc35lYd/k95YkjqyTcN4zspag==
-
 hermes-estree@0.23.1:
   version "0.23.1"
   resolved "https://registry.yarnpkg.com/hermes-estree/-/hermes-estree-0.23.1.tgz#d0bac369a030188120ee7024926aabe5a9f84fdb"
@@ -9990,13 +9985,6 @@ hermes-estree@0.25.1:
   resolved "https://registry.yarnpkg.com/hermes-estree/-/hermes-estree-0.25.1.tgz#6aeec17d1983b4eabf69721f3aa3eb705b17f480"
   integrity sha512-0wUoCcLp+5Ev5pDW2OriHC2MJCbwLwuRx+gAqMTOkGKJJiBCLjtrvy4PWUGn6MIVefecRpzoOZ/UV6iGdOr+Cw==
 
-hermes-parser@0.23.0:
-  version "0.23.0"
-  resolved "https://registry.yarnpkg.com/hermes-parser/-/hermes-parser-0.23.0.tgz#3541907b77ca9e94fd093e8ef0ff97ca5340dee8"
-  integrity sha512-xLwM4ylfHGwrm+2qXfO1JT/fnqEDGSnpS/9hQ4VLtqTexSviu2ZpBgz07U8jVtndq67qdb/ps0qvaWDZ3fkTyg==
-  dependencies:
-    hermes-estree "0.23.0"
-
 hermes-parser@0.23.1:
   version "0.23.1"
   resolved "https://registry.yarnpkg.com/hermes-parser/-/hermes-parser-0.23.1.tgz#e5de648e664f3b3d84d01b48fc7ab164f4b68205"
@@ -14088,15 +14076,6 @@ prepend-http@^2.0.0:
   resolved "https://registry.yarnpkg.com/prettier/-/prettier-2.8.8.tgz#e8c5d7e98a4305ffe3de2e1fc4aca1a71c28b1da"
   integrity sha512-tdN8qQGvNjw4CHbY+XXk0JgCXn9QiF21a55rBe5LJAU+kDyC4WQn4+awm2Xfk2lQMk5fKup9XgzTZtGkjBdP9Q==
 
-prettier-plugin-hermes-parser@0.23.0, prettier-plugin-hermes-parser@^0.23.0:
-  version "0.23.0"
-  resolved "https://registry.yarnpkg.com/prettier-plugin-hermes-parser/-/prettier-plugin-hermes-parser-0.23.0.tgz#67fa061e503600087169283e150bc3f3239bf39c"
-  integrity sha512-EMwgZFcKDyVfUCvIy/kxVc4siYEOYPt7lLqtaELVadKYNbOLUFjYW3QKGZ8jzidUy4DonfFbi/hJOXJ5vfRzxA==
-  dependencies:
-    hermes-estree "0.23.0"
-    hermes-parser "0.23.0"
-    prettier-plugin-hermes-parser "0.23.0"
-
 prettier@*, prettier@^3.3.3:
   version "3.3.3"
   resolved "https://registry.yarnpkg.com/prettier/-/prettier-3.3.3.tgz#30c54fe0be0d8d12e6ae61dbb10109ea00d53105"