diff --git a/.eslintignore b/.eslintignore
index 55b43acda07..4967569ba2e 100644
--- a/.eslintignore
+++ b/.eslintignore
@@ -4,6 +4,8 @@
 **/config/**
 **/build/**
 **/npm/**
+**/__tests__/integration/fixtures/**
+!scripts/npm/**
 **/*.js.flow
 **/*.d.ts
 **/playwright*/**
diff --git a/.eslintrc.js b/.eslintrc.js
index c02e6d2f13a..f68ccf5cc29 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -51,6 +51,8 @@ module.exports = {
       // node scripts should be console logging so don't lint against that
       files: ['scripts/**/*.js'],
       rules: {
+        // https://github.com/Stuk/eslint-plugin-header/issues/39
+        'header/header': OFF,
         'no-console': OFF,
       },
     },
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 0337cb442d0..9c5628c70a2 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -73,6 +73,33 @@ jobs:
         run: npm ci
       - run: npm run test-unit
 
+  integration:
+    if: github.repository_owner == 'facebook'
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        node-version: [18.18.0]
+    env:
+      CI: true
+    steps:
+      - uses: actions/checkout@v3
+      - name: Use Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v3
+        with:
+          node-version: ${{ matrix.node-version }}
+      - run: npm i -g npm@8
+      - uses: actions/cache@v3
+        id: cache
+        with:
+          path: |
+            node_modules
+            ~/.cache/ms-playwright
+          key: ${{ runner.os }}-v${{ secrets.CACHE_VERSION }}-${{ hashFiles('package-lock.json') }}
+      - name: Install dependencies
+        if: steps.cache.outputs.cache-hit != 'true'
+        run: npm ci
+      - run: npm run test-integration
+
   e2e-mac:
     if: github.repository_owner == 'facebook'
     runs-on: macos-latest
diff --git a/.prettierignore b/.prettierignore
index 97fbe5bec01..e1b7e5bcd05 100644
--- a/.prettierignore
+++ b/.prettierignore
@@ -1,14 +1,16 @@
 # NOTE: In general this should be kept in sync with .eslintignore
 
-packages/**/dist/**
-packages/**/build/**
-packages/**/npm/**
-packages/**/config/**
+**/dist/**
+**/build/**
+**/npm/**
+**/__tests__/integration/fixtures/**
+**/config/**
 packages/**/.wxt/**
 packages/playwright
 packages/playwright-core
 packages/**/vite.config.js
 packages/**/vite.prod.config.js
+packages/lexical-website/docs/api
 **/*.md
 **/*.js.flow
 **/node_modules
diff --git a/examples/react-rich/src/plugins/ToolbarPlugin.tsx b/examples/react-rich/src/plugins/ToolbarPlugin.tsx
index 1ace522d99f..264f4815997 100644
--- a/examples/react-rich/src/plugins/ToolbarPlugin.tsx
+++ b/examples/react-rich/src/plugins/ToolbarPlugin.tsx
@@ -57,7 +57,7 @@ export default function ToolbarPlugin() {
       }),
       editor.registerCommand(
         SELECTION_CHANGE_COMMAND,
-        (_payload, newEditor) => {
+        (_payload, _newEditor) => {
           $updateToolbar();
           return false;
         },
diff --git a/examples/react-rich/tsconfig.json b/examples/react-rich/tsconfig.json
index 49071185005..9645d952e73 100644
--- a/examples/react-rich/tsconfig.json
+++ b/examples/react-rich/tsconfig.json
@@ -16,7 +16,8 @@
 
     /* Linting */
     "strict": true,
-    "noUnusedLocals": true,
+    /* This is incompatible with monorepo eslint rules due to unnecessary React imports */
+    "noUnusedLocals": false,
     "noUnusedParameters": true,
     "noFallthroughCasesInSwitch": true
   },
diff --git a/jest.config.js b/jest.config.js
index 2aa0744776b..7e89c93955d 100644
--- a/jest.config.js
+++ b/jest.config.js
@@ -135,6 +135,12 @@ module.exports = {
         '^.+\\.tsx$': 'ts-jest',
       },
     },
+    {
+      ...common,
+      displayName: 'integration',
+      globalSetup: './scripts/__tests__/integration/setup.js',
+      testMatch: ['**/scripts/__tests__/integration/**/*.test.js'],
+    },
     {
       ...common,
       displayName: 'e2e',
diff --git a/package-lock.json b/package-lock.json
index ccaaf0a348c..aa0e8f3e912 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -12,7 +12,6 @@
         "packages/*"
       ],
       "dependencies": {
-        "@types/katex": "^0.14.0",
         "yjs": "^13.5.42"
       },
       "devDependencies": {
@@ -30,8 +29,10 @@
         "@rollup/plugin-replace": "^3.0.0",
         "@rollup/plugin-terser": "^0.4.4",
         "@size-limit/preset-big-lib": "^11.1.2",
+        "@types/child-process-promise": "^2.2.6",
         "@types/jest": "^29.4.0",
         "@types/jsdom": "^21.1.6",
+        "@types/katex": "^0.16.7",
         "@types/node": "^17.0.31",
         "@types/prismjs": "^1.26.0",
         "@types/react": "^18.0.8",
@@ -62,10 +63,11 @@
         "eslint-plugin-sort-keys-fix": "^1.1.2",
         "flow-bin": "^0.226.0",
         "fs-extra": "^10.0.0",
-        "gen-flow-files": "^0.4.11",
         "glob": "^7.2.0",
         "google-closure-compiler": "^20220202.0.0",
         "gzip-size": "^6.0.0",
+        "hermes-parser": "^0.20.1",
+        "hermes-transform": "^0.20.1",
         "husky": "^7.0.1",
         "jest": "^29.4.0",
         "jest-environment-jsdom": "^29.4.0",
@@ -74,13 +76,14 @@
         "minimist": "^1.2.5",
         "npm-run-all": "^4.1.5",
         "prettier": "^2.3.2",
+        "prettier-plugin-hermes-parser": "^0.20.1",
         "prettier-plugin-organize-attributes": "^0.0.5",
         "prettier-plugin-tailwindcss": "^0.4.1",
         "react-test-renderer": "^17.0.2",
         "rollup": "^2.75.5",
         "size-limit": "^11.1.2",
         "tmp": "^0.2.1",
-        "ts-jest": "^29.0.0",
+        "ts-jest": "^29.1.2",
         "ts-node": "^10.9.1",
         "typedoc": "^0.25.12",
         "typescript": "5.1.6"
@@ -999,22 +1002,6 @@
         "@babel/core": "^7.0.0-0"
       }
     },
-    "node_modules/@babel/plugin-proposal-throw-expressions": {
-      "version": "7.18.6",
-      "resolved": "https://registry.npmjs.org/@babel/plugin-proposal-throw-expressions/-/plugin-proposal-throw-expressions-7.18.6.tgz",
-      "integrity": "sha512-WHOrJyhGoGrdtW480L79cF7Iq/gZDZ/z6OqK7mVyFR5I37dTpog/wNgb6hmaM3HYZtULEJl++7VaMWkNZsOcHg==",
-      "dev": true,
-      "dependencies": {
-        "@babel/helper-plugin-utils": "^7.18.6",
-        "@babel/plugin-syntax-throw-expressions": "^7.18.6"
-      },
-      "engines": {
-        "node": ">=6.9.0"
-      },
-      "peerDependencies": {
-        "@babel/core": "^7.0.0-0"
-      }
-    },
     "node_modules/@babel/plugin-syntax-async-generators": {
       "version": "7.8.4",
       "resolved": "https://registry.npmjs.org/@babel/plugin-syntax-async-generators/-/plugin-syntax-async-generators-7.8.4.tgz",
@@ -1244,21 +1231,6 @@
         "@babel/core": "^7.0.0-0"
       }
     },
-    "node_modules/@babel/plugin-syntax-throw-expressions": {
-      "version": "7.18.6",
-      "resolved": "https://registry.npmjs.org/@babel/plugin-syntax-throw-expressions/-/plugin-syntax-throw-expressions-7.18.6.tgz",
-      "integrity": "sha512-rp1CqEZXGv1z1YZ3qYffBH3rhnOxrTwQG8fh2yqulTurwv9zu3Gthfd+niZBLSOi1rY6146TgF+JmVeDXaX4TQ==",
-      "dev": true,
-      "dependencies": {
-        "@babel/helper-plugin-utils": "^7.18.6"
-      },
-      "engines": {
-        "node": ">=6.9.0"
-      },
-      "peerDependencies": {
-        "@babel/core": "^7.0.0-0"
-      }
-    },
     "node_modules/@babel/plugin-syntax-top-level-await": {
       "version": "7.14.5",
       "resolved": "https://registry.npmjs.org/@babel/plugin-syntax-top-level-await/-/plugin-syntax-top-level-await-7.14.5.tgz",
@@ -7714,6 +7686,15 @@
         "@types/node": "*"
       }
     },
+    "node_modules/@types/child-process-promise": {
+      "version": "2.2.6",
+      "resolved": "https://registry.npmjs.org/@types/child-process-promise/-/child-process-promise-2.2.6.tgz",
+      "integrity": "sha512-g0pOHijr6Trug43D2bV0PLSIsSHa/xHEES2HeX5BAlduq1vW0nZcq27Zeud5lgmNB+kPYYVqiMap32EHGTco/w==",
+      "dev": true,
+      "dependencies": {
+        "@types/node": "*"
+      }
+    },
     "node_modules/@types/connect": {
       "version": "3.4.38",
       "resolved": "https://registry.npmjs.org/@types/connect/-/connect-3.4.38.tgz",
@@ -7915,9 +7896,10 @@
       "dev": true
     },
     "node_modules/@types/katex": {
-      "version": "0.14.0",
-      "resolved": "https://registry.npmjs.org/@types/katex/-/katex-0.14.0.tgz",
-      "integrity": "sha512-+2FW2CcT0K3P+JMR8YG846bmDwplKUTsWgT2ENwdQ1UdVfRk3GQrh6Mi4sTopy30gI8Uau5CEqHTDZ6YvWIUPA=="
+      "version": "0.16.7",
+      "resolved": "https://registry.npmjs.org/@types/katex/-/katex-0.16.7.tgz",
+      "integrity": "sha512-HMwFiRujE5PjrgwHQ25+bsLJgowjGjm5Z8FVSf0N6PwgJrwxH0QxzHYDcKsTfV3wva0vzrpqMTJS2jXPr5BMEQ==",
+      "dev": true
     },
     "node_modules/@types/lodash": {
       "version": "4.14.182",
@@ -11750,15 +11732,6 @@
         }
       }
     },
-    "node_modules/decamelize": {
-      "version": "1.2.0",
-      "resolved": "https://registry.npmjs.org/decamelize/-/decamelize-1.2.0.tgz",
-      "integrity": "sha512-z2S+W9X73hAUUki+N+9Za2lBlun89zigOyGrsax+KUQ6wKW4ZoWpEYBkGhQjwAjjDCkWxhY0VKEhk8wzY7F5cA==",
-      "dev": true,
-      "engines": {
-        "node": ">=0.10.0"
-      }
-    },
     "node_modules/decimal.js": {
       "version": "10.4.3",
       "resolved": "https://registry.npmjs.org/decimal.js/-/decimal.js-10.4.3.tgz",
@@ -14694,6 +14667,12 @@
         "node": ">=0.10.0"
       }
     },
+    "node_modules/flow-enums-runtime": {
+      "version": "0.0.6",
+      "resolved": "https://registry.npmjs.org/flow-enums-runtime/-/flow-enums-runtime-0.0.6.tgz",
+      "integrity": "sha512-3PYnM29RFXwvAN6Pc/scUfkI7RwhQ/xqyLUyPNlXUp9S40zI8nup9tUSrTLSVnWGBN38FNiGWbwZOB6uR4OGdw==",
+      "dev": true
+    },
     "node_modules/focus-lock": {
       "version": "1.3.5",
       "resolved": "https://registry.npmjs.org/focus-lock/-/focus-lock-1.3.5.tgz",
@@ -15146,196 +15125,6 @@
         "which": "bin/which"
       }
     },
-    "node_modules/gen-flow-files": {
-      "version": "0.4.11",
-      "resolved": "https://registry.npmjs.org/gen-flow-files/-/gen-flow-files-0.4.11.tgz",
-      "integrity": "sha512-88WjoL6gaxTaJtSal6Nsw9LerVKRVjQEAJy330VOmCS1k+lu2h1HJEJyU9LhviaphZBNG088j6JigA6YiP0xGQ==",
-      "dev": true,
-      "dependencies": {
-        "@babel/core": "^7.7.5",
-        "@babel/generator": "^7.7.4",
-        "@babel/parser": "^7.7.5",
-        "@babel/plugin-proposal-throw-expressions": "^7.7.4",
-        "@babel/plugin-syntax-flow": "^7.7.4",
-        "@babel/traverse": "^7.7.4",
-        "@babel/types": "^7.7.4",
-        "glob": "^7.1.6",
-        "mkdirp": "^0.5.1",
-        "yargs": "^15.0.2"
-      },
-      "bin": {
-        "gen-flow-files": "bin/gen-flow-files.js"
-      }
-    },
-    "node_modules/gen-flow-files/node_modules/ansi-styles": {
-      "version": "4.3.0",
-      "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-4.3.0.tgz",
-      "integrity": "sha512-zbB9rCJAT1rbjiVDb2hqKFHNYLxgtk8NURxZ3IZwD3F6NtxbXZQCnnSi1Lkx+IDohdPlFp222wVALIheZJQSEg==",
-      "dev": true,
-      "dependencies": {
-        "color-convert": "^2.0.1"
-      },
-      "engines": {
-        "node": ">=8"
-      },
-      "funding": {
-        "url": "https://github.com/chalk/ansi-styles?sponsor=1"
-      }
-    },
-    "node_modules/gen-flow-files/node_modules/cliui": {
-      "version": "6.0.0",
-      "resolved": "https://registry.npmjs.org/cliui/-/cliui-6.0.0.tgz",
-      "integrity": "sha512-t6wbgtoCXvAzst7QgXxJYqPt0usEfbgQdftEPbLL/cvv6HPE5VgvqCuAIDR0NgU52ds6rFwqrgakNLrHEjCbrQ==",
-      "dev": true,
-      "dependencies": {
-        "string-width": "^4.2.0",
-        "strip-ansi": "^6.0.0",
-        "wrap-ansi": "^6.2.0"
-      }
-    },
-    "node_modules/gen-flow-files/node_modules/color-convert": {
-      "version": "2.0.1",
-      "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-2.0.1.tgz",
-      "integrity": "sha512-RRECPsj7iu/xb5oKYcsFHSppFNnsj/52OVTRKb4zP5onXwVF3zVmmToNcOfGC+CRDpfK/U584fMg38ZHCaElKQ==",
-      "dev": true,
-      "dependencies": {
-        "color-name": "~1.1.4"
-      },
-      "engines": {
-        "node": ">=7.0.0"
-      }
-    },
-    "node_modules/gen-flow-files/node_modules/color-name": {
-      "version": "1.1.4",
-      "resolved": "https://registry.npmjs.org/color-name/-/color-name-1.1.4.tgz",
-      "integrity": "sha512-dOy+3AuW3a2wNbZHIuMZpTcgjGuLU/uBL/ubcZF9OXbDo8ff4O8yVp5Bf0efS8uEoYo5q4Fx7dY9OgQGXgAsQA==",
-      "dev": true
-    },
-    "node_modules/gen-flow-files/node_modules/find-up": {
-      "version": "4.1.0",
-      "resolved": "https://registry.npmjs.org/find-up/-/find-up-4.1.0.tgz",
-      "integrity": "sha512-PpOwAdQ/YlXQ2vj8a3h8IipDuYRi3wceVQQGYWxNINccq40Anw7BlsEXCMbt1Zt+OLA6Fq9suIpIWD0OsnISlw==",
-      "dev": true,
-      "dependencies": {
-        "locate-path": "^5.0.0",
-        "path-exists": "^4.0.0"
-      },
-      "engines": {
-        "node": ">=8"
-      }
-    },
-    "node_modules/gen-flow-files/node_modules/locate-path": {
-      "version": "5.0.0",
-      "resolved": "https://registry.npmjs.org/locate-path/-/locate-path-5.0.0.tgz",
-      "integrity": "sha512-t7hw9pI+WvuwNJXwk5zVHpyhIqzg2qTlklJOf0mVxGSbe3Fp2VieZcduNYjaLDoy6p9uGpQEGWG87WpMKlNq8g==",
-      "dev": true,
-      "dependencies": {
-        "p-locate": "^4.1.0"
-      },
-      "engines": {
-        "node": ">=8"
-      }
-    },
-    "node_modules/gen-flow-files/node_modules/p-limit": {
-      "version": "2.3.0",
-      "resolved": "https://registry.npmjs.org/p-limit/-/p-limit-2.3.0.tgz",
-      "integrity": "sha512-//88mFWSJx8lxCzwdAABTJL2MyWB12+eIY7MDL2SqLmAkeKU9qxRvWuSyTjm3FUmpBEMuFfckAIqEaVGUDxb6w==",
-      "dev": true,
-      "dependencies": {
-        "p-try": "^2.0.0"
-      },
-      "engines": {
-        "node": ">=6"
-      },
-      "funding": {
-        "url": "https://github.com/sponsors/sindresorhus"
-      }
-    },
-    "node_modules/gen-flow-files/node_modules/p-locate": {
-      "version": "4.1.0",
-      "resolved": "https://registry.npmjs.org/p-locate/-/p-locate-4.1.0.tgz",
-      "integrity": "sha512-R79ZZ/0wAxKGu3oYMlz8jy/kbhsNrS7SKZ7PxEHBgJ5+F2mtFW2fK2cOtBh1cHYkQsbzFV7I+EoRKe6Yt0oK7A==",
-      "dev": true,
-      "dependencies": {
-        "p-limit": "^2.2.0"
-      },
-      "engines": {
-        "node": ">=8"
-      }
-    },
-    "node_modules/gen-flow-files/node_modules/p-try": {
-      "version": "2.2.0",
-      "resolved": "https://registry.npmjs.org/p-try/-/p-try-2.2.0.tgz",
-      "integrity": "sha512-R4nPAVTAU0B9D35/Gk3uJf/7XYbQcyohSKdvAxIRSNghFl4e71hVoGnBNQz9cWaXxO2I10KTC+3jMdvvoKw6dQ==",
-      "dev": true,
-      "engines": {
-        "node": ">=6"
-      }
-    },
-    "node_modules/gen-flow-files/node_modules/path-exists": {
-      "version": "4.0.0",
-      "resolved": "https://registry.npmjs.org/path-exists/-/path-exists-4.0.0.tgz",
-      "integrity": "sha512-ak9Qy5Q7jYb2Wwcey5Fpvg2KoAc/ZIhLSLOSBmRmygPsGwkVVt0fZa0qrtMz+m6tJTAHfZQ8FnmB4MG4LWy7/w==",
-      "dev": true,
-      "engines": {
-        "node": ">=8"
-      }
-    },
-    "node_modules/gen-flow-files/node_modules/wrap-ansi": {
-      "version": "6.2.0",
-      "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-6.2.0.tgz",
-      "integrity": "sha512-r6lPcBGxZXlIcymEu7InxDMhdW0KDxpLgoFLcguasxCaJ/SOIZwINatK9KY/tf+ZrlywOKU0UDj3ATXUBfxJXA==",
-      "dev": true,
-      "dependencies": {
-        "ansi-styles": "^4.0.0",
-        "string-width": "^4.1.0",
-        "strip-ansi": "^6.0.0"
-      },
-      "engines": {
-        "node": ">=8"
-      }
-    },
-    "node_modules/gen-flow-files/node_modules/y18n": {
-      "version": "4.0.3",
-      "resolved": "https://registry.npmjs.org/y18n/-/y18n-4.0.3.tgz",
-      "integrity": "sha512-JKhqTOwSrqNA1NY5lSztJ1GrBiUodLMmIZuLiDaMRJ+itFd+ABVE8XBjOvIWL+rSqNDC74LCSFmlb/U4UZ4hJQ==",
-      "dev": true
-    },
-    "node_modules/gen-flow-files/node_modules/yargs": {
-      "version": "15.4.1",
-      "resolved": "https://registry.npmjs.org/yargs/-/yargs-15.4.1.tgz",
-      "integrity": "sha512-aePbxDmcYW++PaqBsJ+HYUFwCdv4LVvdnhBy78E57PIor8/OVvhMrADFFEDh8DHDFRv/O9i3lPhsENjO7QX0+A==",
-      "dev": true,
-      "dependencies": {
-        "cliui": "^6.0.0",
-        "decamelize": "^1.2.0",
-        "find-up": "^4.1.0",
-        "get-caller-file": "^2.0.1",
-        "require-directory": "^2.1.1",
-        "require-main-filename": "^2.0.0",
-        "set-blocking": "^2.0.0",
-        "string-width": "^4.2.0",
-        "which-module": "^2.0.0",
-        "y18n": "^4.0.0",
-        "yargs-parser": "^18.1.2"
-      },
-      "engines": {
-        "node": ">=8"
-      }
-    },
-    "node_modules/gen-flow-files/node_modules/yargs-parser": {
-      "version": "18.1.3",
-      "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-18.1.3.tgz",
-      "integrity": "sha512-o50j0JeToy/4K6OZcaQmW6lyXXKhq7csREXcDwk2omFPJEwUNOVtJKvmDr9EI1fAJZUyZcRF7kxGBWmRXudrCQ==",
-      "dev": true,
-      "dependencies": {
-        "camelcase": "^5.0.0",
-        "decamelize": "^1.2.0"
-      },
-      "engines": {
-        "node": ">=6"
-      }
-    },
     "node_modules/gensync": {
       "version": "1.0.0-beta.2",
       "resolved": "https://registry.npmjs.org/gensync/-/gensync-1.0.0-beta.2.tgz",
@@ -16074,6 +15863,50 @@
         "he": "bin/he"
       }
     },
+    "node_modules/hermes-eslint": {
+      "version": "0.20.1",
+      "resolved": "https://registry.npmjs.org/hermes-eslint/-/hermes-eslint-0.20.1.tgz",
+      "integrity": "sha512-EhdvFV6RkPIJvbqN8oqFZO1oF4NlPWMjhMjCWkUJX1YL1MZMfkF7nSdx6RKTq6xK17yo+Bgv88L21xuH9GtRpw==",
+      "dev": true,
+      "dependencies": {
+        "esrecurse": "^4.3.0",
+        "hermes-estree": "0.20.1",
+        "hermes-parser": "0.20.1"
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+    },
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+      "dev": true
+    },
+    "hermes-parser": {
+      "version": "0.20.1",
+      "resolved": "https://registry.npmjs.org/hermes-parser/-/hermes-parser-0.20.1.tgz",
+      "integrity": "sha512-BL5P83cwCogI8D7rrDCgsFY0tdYUtmFP9XaXtl2IQjC+2Xo+4okjfXintlTxcIwl4qeGddEl28Z11kbVIw0aNA==",
+      "dev": true,
+      "requires": {
+        "hermes-estree": "0.20.1"
+      }
+    },
+    "hermes-transform": {
+      "version": "0.20.1",
+      "resolved": "https://registry.npmjs.org/hermes-transform/-/hermes-transform-0.20.1.tgz",
+      "integrity": "sha512-gpetyzAQvuLXVWIk8/I2A/ei/5+o8eT+QuSGd8FcWpXoYxVkYjVKLVNE9xKLsEkk2wQ1tXODY5OeOZoaz9jL7Q==",
+      "dev": true,
+      "requires": {
+        "@babel/code-frame": "^7.16.0",
+        "esquery": "^1.4.0",
+        "flow-enums-runtime": "^0.0.6",
+        "hermes-eslint": "0.20.1",
+        "hermes-estree": "0.20.1",
+        "hermes-parser": "0.20.1"
+      }
+    },
     "highlight.js": {
       "version": "10.7.3",
       "resolved": "https://registry.npmjs.org/highlight.js/-/highlight.js-10.7.3.tgz",
@@ -49879,6 +49590,7 @@
       "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-0.5.6.tgz",
       "integrity": "sha512-FP+p8RB8OWpF3YZBCrP5gtADmtXApB5AMLn+vdyA+PyxCjrCs00mjyUozssO33cwDeT3wNGdLxJ5M//YqtHAJw==",
       "dev": true,
+      "optional": true,
       "requires": {
         "minimist": "^1.2.6"
       }
@@ -51553,6 +51265,17 @@
       "resolved": "https://registry.npmjs.org/prettier/-/prettier-2.7.1.tgz",
       "integrity": "sha512-ujppO+MkdPqoVINuDFDRLClm7D78qbDt0/NR+wp5FqEZOoTNAjPHWj17QRhu7geIHJfcNhRk1XVQmF8Bp3ye+g=="
     },
+    "prettier-plugin-hermes-parser": {
+      "version": "0.20.1",
+      "resolved": "https://registry.npmjs.org/prettier-plugin-hermes-parser/-/prettier-plugin-hermes-parser-0.20.1.tgz",
+      "integrity": "sha512-T6dfa1++ckTxd3MbLxS6sTv1T3yvTu1drahNt3g34hyCzSwYTKTByocLyhd1A9j9uCUlIPD+ogum7+i1h3+CEw==",
+      "dev": true,
+      "requires": {
+        "hermes-estree": "0.20.1",
+        "hermes-parser": "0.20.1",
+        "prettier-plugin-hermes-parser": "0.20.1"
+      }
+    },
     "prettier-plugin-organize-attributes": {
       "version": "0.0.5",
       "resolved": "https://registry.npmjs.org/prettier-plugin-organize-attributes/-/prettier-plugin-organize-attributes-0.0.5.tgz",
@@ -52946,12 +52669,6 @@
       "resolved": "https://registry.npmjs.org/require-like/-/require-like-0.1.2.tgz",
       "integrity": "sha512-oyrU88skkMtDdauHDuKVrgR+zuItqr6/c//FXzvmxRGMexSDc6hNvJInGW3LL46n+8b50RykrvwSUIIQH2LQ5A=="
     },
-    "require-main-filename": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/require-main-filename/-/require-main-filename-2.0.0.tgz",
-      "integrity": "sha512-NKN5kMDylKuldxYLSUfrbo5Tuzh4hd+2E8NPPX02mZtn1VuREQToYe/ZdlJy+J3uCpfaiGF05e7B8W0iXbQHmg==",
-      "dev": true
-    },
     "requireindex": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/requireindex/-/requireindex-1.2.0.tgz",
@@ -53493,12 +53210,6 @@
         "send": "0.18.0"
       }
     },
-    "set-blocking": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/set-blocking/-/set-blocking-2.0.0.tgz",
-      "integrity": "sha512-KiKBS8AnWGEyLzofFfmvKwpdPzqiy16LvQfK3yv/fVH7Bj13/wl3JSR1J+rfgRE9q7xUJK4qvgS8raSOeLUehw==",
-      "dev": true
-    },
     "set-value": {
       "version": "4.1.0",
       "resolved": "https://registry.npmjs.org/set-value/-/set-value-4.1.0.tgz",
@@ -54722,9 +54433,9 @@
       "dev": true
     },
     "ts-jest": {
-      "version": "29.0.5",
-      "resolved": "https://registry.npmjs.org/ts-jest/-/ts-jest-29.0.5.tgz",
-      "integrity": "sha512-PL3UciSgIpQ7f6XjVOmbi96vmDHUqAyqDr8YxzopDqX3kfgYtX1cuNeBjP+L9sFXi6nzsGGA6R3fP3DDDJyrxA==",
+      "version": "29.1.2",
+      "resolved": "https://registry.npmjs.org/ts-jest/-/ts-jest-29.1.2.tgz",
+      "integrity": "sha512-br6GJoH/WUX4pu7FbZXuWGKGNDuU7b8Uj77g/Sp7puZV6EXzuByl6JrECvm0MzVzSTkSHWTihsXt+5XYER5b+g==",
       "dev": true,
       "requires": {
         "bs-logger": "0.x",
@@ -54733,7 +54444,7 @@
         "json5": "^2.2.3",
         "lodash.memoize": "4.x",
         "make-error": "1.x",
-        "semver": "7.x",
+        "semver": "^7.5.3",
         "yargs-parser": "^21.0.1"
       }
     },
@@ -56112,12 +55823,6 @@
         "is-symbol": "^1.0.3"
       }
     },
-    "which-module": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/which-module/-/which-module-2.0.0.tgz",
-      "integrity": "sha512-B+enWhmw6cjfVC7kS8Pj9pCrKSc5txArRyaYGe088shv/FGWH+0Rjx/xPgtsWfsUtS27FkP697E4DDhgrgoc0Q==",
-      "dev": true
-    },
     "widest-line": {
       "version": "4.0.1",
       "resolved": "https://registry.npmjs.org/widest-line/-/widest-line-4.0.1.tgz",
diff --git a/package.json b/package.json
index c188d416ac6..7ac67ba7eb9 100644
--- a/package.json
+++ b/package.json
@@ -34,6 +34,7 @@
     "validation": "npx ts-node --cwdMode packages/lexical-playground/src/server/validation.ts",
     "test-unit": "jest --selectProjects unit --testPathPattern",
     "test-unit-watch": "npm run test-unit -- --watch --coverage=''",
+    "test-integration": "jest --selectProjects integration --testPathPattern",
     "test-e2e-chromium": "cross-env E2E_BROWSER=chromium playwright test --project=\"chromium\"",
     "test-e2e-firefox": "cross-env E2E_BROWSER=firefox playwright test --project=\"firefox\"",
     "test-e2e-webkit": "cross-env E2E_BROWSER=webkit playwright test --project=\"webkit\"",
@@ -96,7 +97,11 @@
     "changelog": "func() { git --no-pager log --oneline ${1}...HEAD --pretty=format:\"- %s %an\"; }; func",
     "increment-version": "node ./scripts/npm/increment-version",
     "update-changelog": "node ./scripts/npm/update-changelog",
+    "update-docs": "node ./scripts/update-docs",
     "update-version": "node ./scripts/updateVersion",
+    "update-tsconfig": "node ./scripts/update-tsconfig",
+    "update-flowconfig": "node ./scripts/update-flowconfig",
+    "update-packages": "npm run update-version && npm run update-tsconfig && npm run update-flowconfig && npm run update-docs",
     "postversion": "git checkout -b ${npm_package_version}__release && npm install && npm run update-version && npm run update-changelog && git add -A && git commit -m v${npm_package_version} && git tag -a v${npm_package_version} -m v${npm_package_version}",
     "publish-extension": "npm run zip -w @lexical/devtools && npm run publish -w @lexical/devtools",
     "release": "npm run prepare-release && node ./scripts/npm/release.js",
@@ -117,8 +122,10 @@
     "@rollup/plugin-replace": "^3.0.0",
     "@rollup/plugin-terser": "^0.4.4",
     "@size-limit/preset-big-lib": "^11.1.2",
+    "@types/child-process-promise": "^2.2.6",
     "@types/jest": "^29.4.0",
     "@types/jsdom": "^21.1.6",
+    "@types/katex": "^0.16.7",
     "@types/node": "^17.0.31",
     "@types/prismjs": "^1.26.0",
     "@types/react": "^18.0.8",
@@ -149,10 +156,11 @@
     "eslint-plugin-sort-keys-fix": "^1.1.2",
     "flow-bin": "^0.226.0",
     "fs-extra": "^10.0.0",
-    "gen-flow-files": "^0.4.11",
     "glob": "^7.2.0",
     "google-closure-compiler": "^20220202.0.0",
     "gzip-size": "^6.0.0",
+    "hermes-parser": "^0.20.1",
+    "hermes-transform": "^0.20.1",
     "husky": "^7.0.1",
     "jest": "^29.4.0",
     "jest-environment-jsdom": "^29.4.0",
@@ -161,19 +169,19 @@
     "minimist": "^1.2.5",
     "npm-run-all": "^4.1.5",
     "prettier": "^2.3.2",
+    "prettier-plugin-hermes-parser": "^0.20.1",
     "prettier-plugin-organize-attributes": "^0.0.5",
     "prettier-plugin-tailwindcss": "^0.4.1",
     "react-test-renderer": "^17.0.2",
     "rollup": "^2.75.5",
     "size-limit": "^11.1.2",
     "tmp": "^0.2.1",
-    "ts-jest": "^29.0.0",
+    "ts-jest": "^29.1.2",
     "ts-node": "^10.9.1",
     "typedoc": "^0.25.12",
     "typescript": "5.1.6"
   },
   "dependencies": {
-    "@types/katex": "^0.14.0",
     "yjs": "^13.5.42"
   }
 }
diff --git a/packages/lexical-devtools/tsconfig.json b/packages/lexical-devtools/tsconfig.json
index 919db6be896..51d7b7b5b56 100644
--- a/packages/lexical-devtools/tsconfig.json
+++ b/packages/lexical-devtools/tsconfig.json
@@ -10,6 +10,12 @@
       "lexical": ["../lexical/src/"],
       "lexicalOriginal": ["../lexical/src/"],
       "@lexical/devtools-core": ["../lexical-devtools-core/src/"],
+      "@lexical/html": ["../lexical-html/src/"],
+      "@lexical/link": ["../lexical-link/src/"],
+      "@lexical/mark": ["../lexical-mark/src/"],
+      "@lexical/selection": ["../lexical-selection/src/"],
+      "@lexical/table": ["../lexical-table/src/"],
+      "@lexical/utils": ["../lexical-utils/src/"],
       "shared/canUseDOM": ["../shared/src/canUseDOM.ts"],
       "shared/normalizeClassNames": ["../shared/src/normalizeClassNames.ts"],
       "shared/invariant": ["../shared/src/invariant.ts"],
diff --git a/scripts/__tests__/integration/prepare-release.test.js b/scripts/__tests__/integration/prepare-release.test.js
new file mode 100644
index 00000000000..4e7727da2a2
--- /dev/null
+++ b/scripts/__tests__/integration/prepare-release.test.js
@@ -0,0 +1,31 @@
+/**
+ * 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.
+ *
+ */
+// @ts-check
+'use strict';
+
+const fs = require('fs-extra');
+const glob = require('glob');
+const {packagesManager} = require('../../shared/packagesManager');
+const path = require('node:path');
+const {describeExample} = require('./utils');
+
+describe('prepare-release tests', () => {
+  for (const pkg of packagesManager.getPublicPackages()) {
+    describe(pkg.getNpmName(), () => {
+      const tgzPath = path.join(
+        'npm',
+        `${pkg.getDirectoryName()}-${pkg.packageJson.version}.tgz`,
+      );
+      test(`${tgzPath} exists`, () =>
+        expect(fs.existsSync(tgzPath)).toBe(true));
+    });
+  }
+});
+['examples', 'scripts/__tests__/integration/fixtures']
+  .flatMap((packagesDir) => glob.sync(`${packagesDir}/*/package.json`))
+  .forEach((exampleJsonPath) => describeExample(exampleJsonPath));
diff --git a/scripts/__tests__/integration/setup.js b/scripts/__tests__/integration/setup.js
new file mode 100644
index 00000000000..55bdf1925ac
--- /dev/null
+++ b/scripts/__tests__/integration/setup.js
@@ -0,0 +1,45 @@
+/**
+ * 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.
+ *
+ */
+// @ts-check
+'use strict';
+
+const path = require('node:path');
+const fs = require('fs-extra');
+const {exec} = require('child-process-promise');
+const {packagesManager} = require('../../shared/packagesManager');
+const {version} = require('../../shared/readMonorepoPackageJson')();
+
+/**
+ * @param {import('@jest/types').Config.GlobalConfig} globalConfig
+ * @param {import('@jest/types').Config.ProjectConfig} projectConfig
+ */
+module.exports = async function (globalConfig, projectConfig) {
+  const needsBuild = packagesManager
+    .getPublicPackages()
+    .some(
+      (pkg) =>
+        !fs.existsSync(
+          path.resolve(`./npm/${pkg.getDirectoryName()}-${version}.tgz`),
+        ),
+    );
+  if (!needsBuild) {
+    return;
+  }
+  await exec('npm run prepare-release');
+  const packDest = path.resolve('./npm');
+  fs.mkdirpSync(packDest);
+  for (const pkg of packagesManager.getPublicPackages()) {
+    const cwd = process.cwd();
+    try {
+      process.chdir(pkg.resolve('npm'));
+      await exec(`npm pack --pack-destination '${packDest}'`);
+    } finally {
+      process.chdir(cwd);
+    }
+  }
+};
diff --git a/scripts/__tests__/integration/utils.js b/scripts/__tests__/integration/utils.js
new file mode 100644
index 00000000000..4e3f0c0d9c5
--- /dev/null
+++ b/scripts/__tests__/integration/utils.js
@@ -0,0 +1,156 @@
+/**
+ * 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.
+ *
+ */
+// @ts-check
+'use strict';
+
+const {exec} = require('child-process-promise');
+const {packagesManager} = require('../../shared/packagesManager');
+const fs = require('fs-extra');
+const path = require('node:path');
+
+const monorepoVersion = require('../../shared/readMonorepoPackageJson')()
+  .version;
+
+const LONG_TIMEOUT = 240 * 1000;
+
+/**
+ * @function
+ * @template T
+ * @param {string} dir
+ * @param {() => Promise<T> | T} cb
+ * @returns {Promise<T>}
+ */
+async function withCwd(dir, cb) {
+  const cwd = process.cwd();
+  try {
+    process.chdir(dir);
+    return await cb();
+  } finally {
+    process.chdir(cwd);
+  }
+}
+exports.withCwd = withCwd;
+
+/**
+ * @param {string} cmd
+ * @returns {Promise<string>}
+ */
+function expectSuccessfulExec(cmd) {
+  // playwright detects jest, so we clear this env var while running subcommands
+  const env = Object.fromEntries(
+    Object.entries(process.env).filter(([k]) => k !== 'JEST_WORKER_ID'),
+  );
+  return exec(cmd, {capture: ['stdout', 'stderr'], env}).catch((err) => {
+    expect(
+      Object.fromEntries(
+        ['code', 'stdout', 'stderr'].map((prop) => [prop, err[prop]]),
+      ),
+    ).toBe(null);
+    throw err;
+  });
+}
+exports.expectSuccessfulExec = expectSuccessfulExec;
+
+/**
+ * @typedef {Object} ExampleContext
+ * @property {string} packageJsonPath
+ * @property {string} exampleDir
+ * @property {Record<string, any>} packageJson
+ */
+
+/**
+ * @param {ctx} ExampleContext
+ * @returns {Promise<Map<string, PackageMetadata>>} The installed monorepo dependency map
+ */
+async function buildExample({packageJson, exampleDir}) {
+  let hasPlaywright = false;
+  const depsMap = packagesManager.computedMonorepoDependencyMap(
+    ['dependencies', 'devDependencies', 'peerDependencies'].flatMap(
+      (depType) => {
+        const deps = packageJson[depType] || {};
+        hasPlaywright ||= '@playwright/test' in deps;
+        return Object.keys(deps);
+      },
+    ),
+  );
+  const installDeps = [...depsMap.values()].map((pkg) =>
+    path.resolve('npm', `${pkg.getDirectoryName()}-${monorepoVersion}.tgz`),
+  );
+  if (installDeps.length === 0) {
+    throw new Error(`No lexical dependencies detected: ${exampleDir}`);
+  }
+  ['node_modules', 'dist', 'build', '.next', '.svelte-kit'].forEach(
+    (cleanDir) => fs.removeSync(path.resolve(exampleDir, cleanDir)),
+  );
+  await withCwd(exampleDir, async () => {
+    await exec(
+      `npm install --no-save --no-package-lock ${installDeps
+        .map((fn) => `'${fn}'`)
+        .join(' ')}`,
+    );
+    await expectSuccessfulExec('npm run build');
+    if (hasPlaywright) {
+      await exec('npx playwright install');
+    }
+  });
+  return depsMap;
+}
+
+/**
+ * Build the example project with prerelease lexical artifacts
+ *
+ * @param {string} packgeJsonPath
+ * @param {undefined | (ctx: ExampleContext) => void} [bodyFun=undefined]
+ */
+function describeExample(packageJsonPath, bodyFun = undefined) {
+  const packageJson = fs.readJsonSync(packageJsonPath);
+  const exampleDir = path.dirname(packageJsonPath);
+  /** @type {ExampleContext} */
+  const ctx = {exampleDir, packageJson, packageJsonPath};
+  describe(exampleDir, () => {
+    /** @type {PackageMetadata[]} */
+    const deps = [];
+    beforeAll(async () => {
+      deps.push(...(await buildExample(ctx)).values());
+    }, LONG_TIMEOUT);
+    test('install & build succeeded', () => {
+      expect(true).toBe(true);
+    });
+    test(`installed lexical ${monorepoVersion}`, () => {
+      const packageNames = deps.map((pkg) => pkg.getNpmName());
+      expect(packageNames).toContain('lexical');
+      for (const pkg of deps) {
+        const installedPath = path.join(
+          exampleDir,
+          'node_modules',
+          pkg.getNpmName(),
+        );
+        expect({[installedPath]: fs.existsSync(installedPath)}).toEqual({
+          [installedPath]: true,
+        });
+        expect(
+          fs.readJsonSync(path.join(installedPath, 'package.json')),
+        ).toMatchObject({name: pkg.getNpmName(), version: monorepoVersion});
+      }
+    });
+    if (packageJson.scripts.test) {
+      test(
+        'tests pass',
+        async () => {
+          await withCwd(exampleDir, () => expectSuccessfulExec('npm run test'));
+        },
+        LONG_TIMEOUT,
+      );
+    }
+    if (bodyFun) {
+      bodyFun(ctx);
+    }
+  });
+}
+
+exports.describeExample = describeExample;
diff --git a/scripts/__tests__/unit/build.test.js b/scripts/__tests__/unit/build.test.js
new file mode 100644
index 00000000000..6e551995474
--- /dev/null
+++ b/scripts/__tests__/unit/build.test.js
@@ -0,0 +1,117 @@
+/**
+ * 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.
+ *
+ */
+// @ts-check
+'use strict';
+
+const fs = require('fs-extra');
+const glob = require('glob');
+const path = require('node:path');
+const {packagesManager} = require('../../shared/packagesManager');
+
+const monorepoPackageJson = require('../../shared/readMonorepoPackageJson')();
+
+const publicNpmNames = new Set(
+  packagesManager.getPublicPackages().map((pkg) => pkg.getNpmName()),
+);
+
+describe('public package.json audits (`npm run update-version` to fix most issues)', () => {
+  packagesManager.getPublicPackages().forEach((pkg) => {
+    const npmName = pkg.getNpmName();
+    const packageJson = pkg.packageJson;
+    describe(npmName, () => {
+      const sourceFiles = fs
+        .readdirSync(pkg.resolve('src'))
+        .filter((str) => /\.tsx?/.test(str))
+        .map((str) => str.replace(/\.tsx?$/, '', str))
+        .sort();
+      const exportedModules = pkg.getExportedNpmModuleNames().sort();
+      const {dependencies = {}, peerDependencies = {}} = packageJson;
+      if (packageJson.main) {
+        it('should only export the main module with main set', () => {
+          expect(exportedModules).toEqual([npmName]);
+        });
+      }
+      it('has *.flow types', () => {
+        expect(glob.sync(pkg.resolve('flow', '*.flow'))).not.toEqual([]);
+      });
+      it('uses the expected directory/npm naming convention', () => {
+        expect(npmName.replace(/^@/, '').replace('/', '-')).toBe(
+          pkg.getDirectoryName(),
+        );
+      });
+      it('matches monorepo version', () => {
+        expect(packageJson.version).toBe(monorepoPackageJson.version);
+      });
+      it('must not have a direct dependency on react or react-dom', () => {
+        expect(dependencies).not.toContain('react');
+        expect(dependencies).not.toContain('react-dom');
+      });
+      it('must not have monorepo peerDependencies', () => {
+        expect(
+          Object.keys(peerDependencies).filter((dep) =>
+            publicNpmNames.has(dep),
+          ),
+        ).toEqual([]);
+      });
+      it('monorepo dependencies must use the exact monorepo version', () => {
+        Object.entries(dependencies).forEach(([dep, version]) => {
+          if (publicNpmNames.has(dep)) {
+            expect([dep, version]).toEqual([dep, monorepoPackageJson.version]);
+          }
+        });
+      });
+      it('must export at least one module', () => {
+        expect(exportedModules.length).toBeGreaterThanOrEqual(1);
+      });
+      test.each(exportedModules)(
+        `should have a source file for exported module %s`,
+        (exportedModule) => {
+          expect(sourceFiles).toContain(
+            exportedModule.slice(npmName.length + 1) || 'index',
+          );
+        },
+      );
+      if (!sourceFiles.includes('index')) {
+        it('must not export a top-level module without an index.tsx?', () => {
+          expect(exportedModules).not.toContain(npmName);
+        });
+        test.each(sourceFiles)(
+          `%s.tsx? must have an exported module`,
+          (sourceFile) => {
+            expect(exportedModules).toContain(`${npmName}/${sourceFile}`);
+          },
+        );
+      }
+    });
+  });
+});
+
+describe('documentation audits (`npm run update-docs` to fix most issues)', () => {
+  const webPkg = packagesManager.getPackageByDirectoryName('lexical-website');
+  packagesManager.getPublicPackages().forEach((pkg) => {
+    const npmName = pkg.getNpmName();
+    describe(npmName, () => {
+      const root = pkg.resolve('..', '..');
+      [
+        pkg.resolve('README.md'),
+        webPkg.resolve('docs', 'packages', `${pkg.getDirectoryName()}.md`),
+      ].forEach((docPath) => {
+        describe(path.relative(root, docPath), () => {
+          it('exists', () => expect(fs.existsSync(docPath)).toBe(true));
+          if (path.basename(docPath) === 'README.md') {
+            it('does not have the TODO description', () => {
+              expect(fs.readFileSync(docPath, 'utf8')).not.toContain(
+                'TODO: This package needs a description!',
+              );
+            });
+          }
+        });
+      });
+    });
+  });
+});
diff --git a/scripts/npm/increment-version.js b/scripts/npm/increment-version.js
index aea4a940d46..2e802a510d9 100644
--- a/scripts/npm/increment-version.js
+++ b/scripts/npm/increment-version.js
@@ -12,6 +12,7 @@
 
 const {exec} = require('child-process-promise');
 const argv = require('minimist')(process.argv.slice(2));
+
 const increment = argv.i;
 const validIncrements = new Set(['minor', 'patch', 'prerelease']);
 if (!validIncrements.has(increment)) {
@@ -19,11 +20,11 @@ if (!validIncrements.has(increment)) {
   process.exit(1);
 }
 
-async function incrementVersion(increment) {
+async function incrementVersion() {
   const preId = increment === 'prerelease' ? '--preid next' : '';
   const workspaces = '';
   const command = `npm --no-git-tag-version version ${increment} --include-workspace-root true ${preId} ${workspaces}`;
   await exec(command);
 }
 
-incrementVersion(increment);
+incrementVersion();
diff --git a/scripts/shared/PackageMetadata.js b/scripts/shared/PackageMetadata.js
new file mode 100644
index 00000000000..fcc9b0861ff
--- /dev/null
+++ b/scripts/shared/PackageMetadata.js
@@ -0,0 +1,210 @@
+/**
+ * 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.
+ *
+ */
+// @ts-check
+'use strict';
+
+const path = require('node:path');
+const fs = require('fs-extra');
+const npmToWwwName = require('../www/npmToWwwName');
+
+/**
+ * @typedef {Object} ModuleBuildDefinition
+ * @property {string} outputFileName
+ * @property {string} sourceFileName
+ */
+
+/**
+ * @typedef {Object} PackageBuildDefinition
+ * @property {Array<ModuleBuildDefinition>} modules
+ * @property {string} name
+ * @property {string} outputPath
+ * @property {string} packageName
+ * @property {string} sourcePath
+ */
+
+/**
+ * @typedef {Object} ModuleExportEntry
+ * @property {string} name
+ * @property {string} sourceFileName
+ */
+
+/**
+ * @typedef {readonly [string, Record<'import'|'require', Object>]} NpmModuleExportEntry
+ */
+
+/**
+ *
+ * @param {string} wwwName
+ * @returns {string} An easier to read name ('Lexical' -> 'Lexical Core', 'LexicalRichText' -> 'Lexical Rich Text')
+ */
+function readableName(wwwName) {
+  return wwwName === 'Lexical'
+    ? 'Lexical Core'
+    : wwwName.replace(/([A-Z])/g, ' $1').trim();
+}
+
+/**
+ * Metadata abstraction for a package.json file
+ */
+class PackageMetadata {
+  /** @type {string} the path to the package.json file */
+  packageJsonPath;
+  /** @type {Record<string, any>} the parsed package.json */
+  packageJson;
+
+  /**
+   * @param {string} packageJsonPath the path to the package.json file
+   */
+  constructor(packageJsonPath) {
+    this.packageJsonPath = packageJsonPath;
+    this.packageJson = fs.readJsonSync(packageJsonPath);
+  }
+
+  /**
+   * @param {...string} paths to resolve in this package's directory
+   * @returns {string} Resolve a path in this package's directory
+   */
+  resolve(...paths) {
+    return path.resolve(path.dirname(this.packageJsonPath), ...paths);
+  }
+
+  /**
+   * @returns {string} the directory name of the package, e.g. 'lexical-rich-text'
+   */
+  getDirectoryName() {
+    return path.basename(path.dirname(this.packageJsonPath));
+  }
+
+  /**
+   * @returns {string} the npm name of the package, e.g. '@lexical/rich-text'
+   */
+  getNpmName() {
+    return this.packageJson.name;
+  }
+
+  /**
+   * @returns {boolean} whether the package is marked private (not published to npm)
+   */
+  isPrivate() {
+    return !!this.packageJson.private;
+  }
+
+  /**
+   * Get an array of (fully qualified) exported module names and their
+   * corresponding export map. Ignores the backwards compatibility '.js'
+   * exports and replaces /^.[/]?/ with the npm name of the package.
+   *
+   * E.g. [['lexical', {...}]] or [['@lexical/react/LexicalComposer', {...}]
+   *
+   * @returns {Array<NpmModuleExportEntry>}
+   */
+  getNormalizedNpmModuleExportEntries() {
+    // It doesn't make much sense to do this for private modules
+    if (this.isPrivate()) {
+      throw new Error('This should only be called on public packages');
+    }
+    // All our packages should have exports if update-version has been run
+    if (!this.packageJson.exports) {
+      throw new Error(
+        'This package should have exports, try `npm run update-version` first',
+      );
+    }
+    /** @type {Array<NpmModuleExportEntry>} */
+    const entries = [];
+    for (const [key, value] of Object.entries(this.packageJson.exports)) {
+      if (key.endsWith('.js')) {
+        continue;
+      }
+      entries.push([`${this.getNpmName()}${key.replace(/^./, '')}`, value]);
+    }
+    return entries.sort((a, b) => a[0].localeCompare(b[0]));
+  }
+
+  /**
+   * @returns {Array<string>} the npm module names that this package exports
+   */
+  getExportedNpmModuleNames() {
+    return this.getNormalizedNpmModuleExportEntries().map(([name]) => name);
+  }
+
+  /**
+   * The entries of npm module names to their .tsx? source files
+   *
+   * @returns {Array<ModuleExportEntry>}
+   */
+  getExportedNpmModuleEntries() {
+    const npmName = this.getNpmName();
+    return this.getExportedNpmModuleNames().map((name) => {
+      const outputFileName = npmToWwwName(name);
+      const sourceBaseName = name === npmName ? 'index' : outputFileName;
+      const sourceCandidates = ['.ts', '.tsx'].map(
+        (ext) => sourceBaseName + ext,
+      );
+      const sourceFileName = sourceCandidates.find((fn) =>
+        fs.existsSync(this.resolve('src', fn)),
+      );
+      if (!sourceFileName) {
+        throw new Error(
+          `Could not find source file for ${name} at packages/${this.getDirectoryName()}/src/${
+            sourceCandidates[0]
+          }?`,
+        );
+      }
+      return {name, sourceFileName};
+    });
+  }
+
+  /**
+   * The map of import module names to their .tsx? source files
+   * (for private modules such as shared)
+   *
+   * @returns {Array<ModuleExportEntry>}
+   */
+  getPrivateModuleEntries() {
+    const npmName = this.getNpmName();
+    const entries = [];
+    for (const sourceFileName of fs.readdirSync(this.resolve('src'))) {
+      const m = /^([^.]+)\.tsx?$/.exec(sourceFileName);
+      if (m) {
+        entries.push({
+          name: m[1] === 'index' ? npmName : `${npmName}/${m[1]}`,
+          sourceFileName,
+        });
+      }
+    }
+    return entries.sort((a, b) => a.name.localeCompare(b.name));
+  }
+
+  /**
+   * @returns {PackageBuildDefinition}
+   */
+  getPackageBuildDefinition() {
+    const npmName = this.getNpmName();
+    return {
+      modules: this.getExportedNpmModuleEntries().map(
+        ({name, sourceFileName}) => ({
+          outputFileName: npmToWwwName(name),
+          sourceFileName,
+        }),
+      ),
+      name: readableName(npmToWwwName(npmName)),
+      outputPath: this.resolve('dist/'),
+      packageName: this.getDirectoryName(),
+      sourcePath: this.resolve('src/'),
+    };
+  }
+
+  /**
+   * Writes this.packageJson back to this.packageJsonPath
+   */
+  writeSync() {
+    fs.writeJsonSync(this.packageJsonPath, this.packageJson, {spaces: 2});
+  }
+}
+
+exports.PackageMetadata = PackageMetadata;
diff --git a/scripts/shared/packagesManager.js b/scripts/shared/packagesManager.js
new file mode 100644
index 00000000000..d70a23ead0a
--- /dev/null
+++ b/scripts/shared/packagesManager.js
@@ -0,0 +1,133 @@
+/**
+ * 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.
+ *
+ */
+// @ts-check
+'use strict';
+
+const path = require('node:path');
+const glob = require('glob');
+
+const {PackageMetadata} = require('./PackageMetadata');
+
+/**
+ *
+ * @param {PackageMetadata} a
+ * @param {PackageMetadata} b
+ * @returns {number}
+ */
+function packageSort(a, b) {
+  return a.getDirectoryName().localeCompare(b.getDirectoryName());
+}
+
+/** Cache of all PackageMetadata for the packages directory */
+class PackagesManager {
+  /** @type {Array<PackageMetadata>} */
+  packages;
+  /** @type {Map<string, PackageMetadata>} */
+  packagesByNpmName = new Map();
+  /** @type {Map<string, PackageMetadata>} */
+  packagesByDirectoryName = new Map();
+
+  /**
+   * @param {Array<string>} packagePaths
+   */
+  constructor(packagePaths) {
+    this.packages = packagePaths
+      .map((packagePath) => new PackageMetadata(packagePath))
+      .sort(packageSort);
+    for (const pkg of this.packages) {
+      this.packagesByNpmName.set(pkg.getNpmName(), pkg);
+      this.packagesByDirectoryName.set(pkg.getDirectoryName(), pkg);
+    }
+  }
+
+  /**
+   * Get the PackageMetadata for a package by its npm name.
+   * @param {string} name
+   * @returns {PackageMetadata}
+   */
+  getPackageByNpmName(name) {
+    const pkg = this.packagesByNpmName.get(name);
+    if (!pkg) {
+      throw new Error(`Missing package with npm name '${name}'`);
+    }
+    return pkg;
+  }
+
+  /**
+   * Get the PackageMetadata for a package by its npm name.
+   * @param {string} name
+   * @returns {PackageMetadata}
+   */
+  getPackageByDirectoryName(name) {
+    const pkg = this.packagesByDirectoryName.get(name);
+    if (!pkg) {
+      throw new Error(`Missing package with directory name '${name}'`);
+    }
+    return pkg;
+  }
+
+  /**
+   * Get the cached metadata for all packages in the packages directory,
+   * sorted by directory name.
+   * @returns {Array<PackageMetadata>}
+   */
+  getPackages() {
+    return this.packages;
+  }
+
+  /**
+   * Get the cached metadata for packages in the packages directory
+   * where the private field is not set to true, sorted by directory
+   * name ('lexical' will come before 'lexical-*').
+   * @returns {Array<PackageMetadata>}
+   */
+  getPublicPackages() {
+    return this.packages.filter((pkg) => !pkg.isPrivate());
+  }
+
+  /**
+   * Given an array of npm dependencies (may include non-Lexical names),
+   * return all required transitive monorepo dependencies to have those
+   * packages (in a topologically ordered Map).
+   *
+   * @param {Array<string>} npmDependencies
+   * @returns {Map<string, PackageMetadata>}
+   */
+  computedMonorepoDependencyMap(npmDependencies) {
+    /** @type {Map<string, PackageMetadata>} */
+    const depsMap = new Map();
+    const visited = new Set();
+    /** @param {string[]} deps */
+    const traverse = (deps) => {
+      for (const dep of deps) {
+        if (visited.has(dep)) {
+          continue;
+        }
+        visited.add(dep);
+        if (!depsMap.has(dep)) {
+          const pkg = this.packagesByNpmName.get(dep);
+          if (pkg) {
+            traverse(Object.keys(pkg.packageJson.dependencies || {}));
+            depsMap.set(dep, pkg);
+          }
+        }
+      }
+    };
+    traverse(npmDependencies);
+    return depsMap;
+  }
+}
+
+exports.packagesManager = new PackagesManager(
+  glob.sync(
+    path.resolve(
+      path.dirname(path.dirname(__dirname)),
+      'packages/*/package.json',
+    ),
+  ),
+);
diff --git a/scripts/shared/readMonorepoPackageJson.js b/scripts/shared/readMonorepoPackageJson.js
new file mode 100644
index 00000000000..b905b31eb22
--- /dev/null
+++ b/scripts/shared/readMonorepoPackageJson.js
@@ -0,0 +1,16 @@
+/**
+ * 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.
+ *
+ */
+// @ts-check
+'use strict';
+
+const fs = require('fs-extra');
+const path = require('node:path');
+
+module.exports = function readMonorepoPackageJson() {
+  return fs.readJsonSync(path.resolve(__dirname, '../../package.json'));
+};
diff --git a/scripts/update-docs.js b/scripts/update-docs.js
new file mode 100644
index 00000000000..fbea3037d36
--- /dev/null
+++ b/scripts/update-docs.js
@@ -0,0 +1,79 @@
+/**
+ * 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.
+ *
+ */
+// @ts-check
+'use strict';
+
+const fs = require('fs-extra');
+const path = require('node:path');
+const {packagesManager} = require('./shared/packagesManager');
+
+const webPkg = packagesManager.getPackageByDirectoryName('lexical-website');
+
+function sidebarTemplate(npmName, readmePath) {
+  return (
+    `
+---
+title: ''
+sidebar_label: '${npmName}'
+---
+
+{@import ${readmePath}}
+`.trim() + '\n'
+  );
+}
+
+function readmeTemplate(npmName, directoryName, description) {
+  const apiModuleName = directoryName.replace(/-/g, '_');
+  return (
+    `
+    # \`${npmName}\`
+
+[![See API Documentation](https://lexical.dev/img/see-api-documentation.svg)](https://lexical.dev/docs/api/modules/${apiModuleName})
+
+${description}
+`.trim() + '\n'
+  );
+}
+
+function updateDocs() {
+  packagesManager.getPublicPackages().forEach((pkg) => {
+    const npmName = pkg.getNpmName();
+    const directoryName = pkg.getDirectoryName();
+    const root = pkg.resolve('..', '..');
+    const readmePath = pkg.resolve('README.md');
+    const sidebarPath = webPkg.resolve(
+      'docs',
+      'packages',
+      `${directoryName}.md`,
+    );
+    if (!fs.existsSync(readmePath)) {
+      console.log(`Creating ${path.relative(root, readmePath)}`);
+      fs.writeFileSync(
+        readmePath,
+        readmeTemplate(
+          npmName,
+          directoryName,
+          pkg.packageJson.description ||
+            'TODO: This package needs a description!',
+        ),
+      );
+    }
+    if (!fs.existsSync(sidebarPath)) {
+      console.log(`Creating ${path.relative(root, sidebarPath)}`);
+      fs.writeFileSync(
+        sidebarPath,
+        sidebarTemplate(
+          npmName,
+          path.relative(path.dirname(sidebarPath), readmePath),
+        ),
+      );
+    }
+  });
+}
+
+updateDocs();
diff --git a/scripts/update-flowconfig.js b/scripts/update-flowconfig.js
new file mode 100644
index 00000000000..9d2e9b872f9
--- /dev/null
+++ b/scripts/update-flowconfig.js
@@ -0,0 +1,99 @@
+/**
+ * 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.
+ *
+ */
+// @ts-check
+'use strict';
+
+const fs = require('fs-extra');
+const path = require('node:path');
+const {packagesManager} = require('./shared/packagesManager');
+const npmToWwwName = require('./www/npmToWwwName');
+
+const headerTemplate = fs.readFileSync(
+  path.resolve(__dirname, 'www', 'headerTemplate.js'),
+  'utf8',
+);
+
+const BLOCK_REGEX =
+  /^([\s\S]+?\n;; \[generated-start update-flowconfig\]\n)([\s\S]*?)(;; \[generated-end update-flowconfig\][\s\S]+)$/;
+
+function flowTemplate(wwwName) {
+  return (
+    headerTemplate.replace(/^( *\/)$/, '* @flow strict\n$1') +
+    `
+/**
+ * ${wwwName}
+ */` +
+    '\n'
+  );
+}
+
+/**
+ * @param {string} configContents
+ * @param {string} generatedCode
+ */
+function replaceBlock(configContents, generatedCode) {
+  const m = configContents.match(BLOCK_REGEX);
+  if (!m) {
+    throw new Error(
+      `update-flowconfig block not found in .flowconfig, expecting ';; [generated-start update-flowconfig]' followed by ';; [generated-end update-flowconfig]`,
+    );
+  }
+  return `${m[1]}${generatedCode}${m[3]}`;
+}
+
+function updateFlowconfig(flowconfigPath = './.flowconfig') {
+  const prevConfig = fs.readFileSync(flowconfigPath, 'utf8');
+  const configDir = path.resolve(path.dirname(flowconfigPath));
+  /** @type {Array<string>} */
+  const generatedBlock = [];
+  const emit = (moduleName, flowFilename) =>
+    generatedBlock.push(
+      `module.name_mapper='^${moduleName}$' -> '${flowFilename}'\n`,
+    );
+  for (const pkg of packagesManager.getPackages()) {
+    const resolveRelative = (...subPaths) =>
+      '<PROJECT_ROOT>/' +
+      path.relative(configDir, pkg.resolve(...subPaths)).replace(/^(?!\.)/, '');
+    if (pkg.isPrivate()) {
+      if (pkg.getDirectoryName() !== 'shared') {
+        continue;
+      }
+      if (process.env.TODO_DOES_WWW_NEED_SHARED_FILES === '1') {
+        // Do these even work? These .js files aren't on disk and `npm run flow`
+        // passes without them. Code is left in for demonstration purposes if
+        // this is needed for www.
+        for (const {name, sourceFileName} of pkg.getPrivateModuleEntries()) {
+          emit(
+            name,
+            resolveRelative('src', sourceFileName.replace(/\.tsx?$/, '.js')),
+          );
+        }
+      }
+    } else {
+      for (const name of pkg.getExportedNpmModuleNames()) {
+        const wwwName = npmToWwwName(name);
+        const flowFile = `${wwwName}.js.flow`;
+        const resolvedFlowFile = resolveRelative('flow', flowFile);
+        emit(name, resolveRelative('flow', flowFile));
+        const flowFilePath = pkg.resolve('flow', flowFile);
+        if (!fs.existsSync(flowFilePath)) {
+          console.log(
+            `Creating boilerplate ${resolvedFlowFile.replace(/^[^/]+\//, '')}`,
+          );
+          fs.writeFileSync(flowFilePath, flowTemplate(wwwName));
+        }
+      }
+    }
+  }
+  const nextConfig = replaceBlock(prevConfig, generatedBlock.join(''));
+  if (prevConfig !== nextConfig) {
+    fs.writeFileSync(flowconfigPath, nextConfig);
+  }
+}
+
+updateFlowconfig();
diff --git a/scripts/update-tsconfig.js b/scripts/update-tsconfig.js
new file mode 100644
index 00000000000..64fa49c7c75
--- /dev/null
+++ b/scripts/update-tsconfig.js
@@ -0,0 +1,110 @@
+/**
+ * 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.
+ *
+ */
+// @ts-check
+'use strict';
+
+const fs = require('fs-extra');
+const glob = require('glob');
+const path = require('node:path');
+const prettier = require('prettier');
+const {packagesManager} = require('./shared/packagesManager');
+
+/**
+ * @typedef {Object} UpdateTsconfigOptions
+ * @property {Array<[string, Array<string>]>} extraPaths additional paths to add
+ * @property {string} jsonFileName path to the tsconfig.json
+ * @property {import('prettier').Options} prettierConfig the monorepo prettier config
+ * @property {boolean} test true to include the test paths (default: false)
+ */
+
+/**
+ * @param {opts} UpdateTsconfigOptions
+ * @returns {Promise<void>}
+ */
+async function updateTsconfig({
+  extraPaths,
+  jsonFileName,
+  prettierConfig,
+  test,
+}) {
+  const prevTsconfigContents = fs.readFileSync(jsonFileName, 'utf8');
+  const tsconfig = JSON.parse(prevTsconfigContents);
+  const publicPaths = [];
+  const privatePaths = [];
+  const testPaths = [];
+  const configDir = path.resolve(path.dirname(jsonFileName));
+  for (const pkg of packagesManager.getPackages()) {
+    const resolveRelative = (...subPaths) =>
+      path
+        .relative(configDir, pkg.resolve(...subPaths))
+        .replace(/^(?!\.)/, './');
+
+    if (pkg.isPrivate()) {
+      if (pkg.getDirectoryName() !== 'shared') {
+        continue;
+      }
+      for (const {name, sourceFileName} of pkg.getPrivateModuleEntries()) {
+        privatePaths.push([name, [resolveRelative('src', sourceFileName)]]);
+      }
+    } else {
+      for (const {name, sourceFileName} of pkg.getExportedNpmModuleEntries()) {
+        publicPaths.push([name, [resolveRelative('src', sourceFileName)]]);
+      }
+    }
+    if (test) {
+      testPaths.push([`${pkg.getNpmName()}/src`, [resolveRelative('src')]]);
+      for (const fn of glob.sync(
+        pkg.resolve('src', '__tests__', 'utils', '*.{ts,tsx,mjs,jsx}'),
+      )) {
+        testPaths.push([
+          `${pkg.getNpmName()}/src/__tests__/utils`,
+          [resolveRelative(fn)],
+        ]);
+      }
+    }
+  }
+  const paths = Object.fromEntries([
+    ...extraPaths,
+    ...publicPaths,
+    ...privatePaths,
+    ...testPaths,
+  ]);
+  tsconfig.compilerOptions.paths = paths;
+  // This is async in future versions of prettier
+  const nextTsconfigContents = await prettier.format(JSON.stringify(tsconfig), {
+    ...prettierConfig,
+    filepath: jsonFileName,
+  });
+  if (prevTsconfigContents !== nextTsconfigContents) {
+    fs.writeFileSync(jsonFileName, nextTsconfigContents);
+  }
+}
+
+async function updateAllTsconfig() {
+  const prettierConfig = (await prettier.resolveConfig('./')) || {};
+  await updateTsconfig({
+    extraPaths: [],
+    jsonFileName: './tsconfig.json',
+    prettierConfig,
+    test: true,
+  });
+  await updateTsconfig({
+    extraPaths: [],
+    jsonFileName: './tsconfig.build.json',
+    prettierConfig,
+    test: false,
+  });
+  await updateTsconfig({
+    extraPaths: [['lexicalOriginal', ['../lexical/src/']]],
+    jsonFileName: './packages/lexical-devtools/tsconfig.json',
+    prettierConfig,
+    test: false,
+  });
+}
+
+updateAllTsconfig();
diff --git a/scripts/www/npmToWwwName.js b/scripts/www/npmToWwwName.js
new file mode 100644
index 00000000000..7f3880d97a5
--- /dev/null
+++ b/scripts/www/npmToWwwName.js
@@ -0,0 +1,34 @@
+/**
+ * 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.
+ *
+ */
+'use strict';
+
+/**
+ * Converts a package name in the npm name convention to the www
+ * convention, e.g.:
+ * '@lexical/rich-text' -> 'LexicalRichText'
+ * '@lexical/react/LexicalComposer' -> 'LexicalComposer'
+ * '@lexical/react/useLexicalEditor' -> 'useLexicalEditor'
+ *
+ * @param {string} name the npm or directory name of a package
+ * @returns {string} the name of the package in www format
+ */
+module.exports = function npmToWwwName(name) {
+  const parts = name.replace(/^@/, '').split(/\//g);
+  // Handle the @lexical/react/FlatNameSpace scenario
+  if (parts.length > 2) {
+    parts.splice(0, parts.length - 1);
+  }
+  return parts
+    .flatMap((part) => part.split('-'))
+    .map((part) =>
+      part.startsWith('useLexical')
+        ? part
+        : part.charAt(0).toUpperCase() + part.slice(1),
+    )
+    .join('');
+};