diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..c23badc
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,47 @@
+# For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-nodejs
+
+name: CI
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+jobs:
+  Lint:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [23.x]
+    steps:
+    - uses: actions/checkout@v3
+      with:
+        node-version: ${{ matrix.node-version }}
+        cache: 'npm'
+    - run: npm ci
+    - run: npm run test:lint
+    - run: npm run test:types
+
+  Test:
+    runs-on:
+      macos-latest
+      ubuntu-latest
+      windows-latest
+
+    strategy:
+      matrix:
+        node-version: [23.x, 22.x, 20.x]
+        fail-fast: false
+
+    steps:
+    - uses: actions/checkout@v3
+    - name: Use Node.js ${{ matrix.node-version }}
+      uses: actions/setup-node@v3
+      with:
+        node-version: ${{ matrix.node-version }}
+        cache: 'npm'
+    - run: npm ci
+    - run: npm run test:unit
+    - run: npm run test:e2e
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
new file mode 100644
index 0000000..a004a59
--- /dev/null
+++ b/CONTRIBUTING.md
@@ -0,0 +1,18 @@
+# Contributing
+
+A recipe generally has a few things:
+
+* A `README.md` explaining its purpose and use (including any options, and required and optional
+files).
+* Tests via node's test runner (min coverage: 80%)
+  * unit tests  (file extension: `.spec.mjs` or `.spec.mts`)
+  * end-to-end test(s) for accepted use-cases (file extension: `.e2e.mjs` or `.e2e.mts`)
+* Code comments (js docs, etc)
+* Types (either via typescript or jsdoc)
+
+CI will run lint & type checking and all included test files against all PRs.
+
+> [!INFO]
+> snapshots will be generated with the file extension `.snap.cjs`.
+
+New recipes are added under `./recipes` in their own folder, succinctly named for what it does. General-purpose recipes have simple names like `correct-ts-specifiers`. A suite of migrations has a name like `migrate from 18 to 20`, and more specific migrations are named like `migrate fs.readFile from 18 to 20`.
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..bb08a3e
--- /dev/null
+++ b/README.md
@@ -0,0 +1,23 @@
+# Node.js userland migrations
+
+This repository contains codemodes (automated migrations) for "userland" code. These are intended to facilitate adopting new features and upgrading source-code affected by breaking changes.
+
+## Usage
+
+> [!CAUTION]
+> These scripts change source code. Commit any unsaved changes before running them. Failing to do so may ruin your day.
+
+To run the transform scripts use [`codemod`](https://go.codemod.com/github) command below:
+
+```console
+$ npx codemod <transform> --target <path> [...options]
+```
+
+* `transform` - name of transform. see available transforms below.
+* `path` - directory to transform. defaults to the current directory.
+
+See the [codemod CLI doc](https://go.codemod.com/cli-docs) for a full list of available commands.
+
+## Available codemods
+
+All Node.js codemods are also available in the [Codemod Registry](https://codemod.com/registry?framework=node.js).
diff --git a/biome.jsonc b/biome.jsonc
new file mode 100644
index 0000000..679df3f
--- /dev/null
+++ b/biome.jsonc
@@ -0,0 +1,28 @@
+{
+  "formatter": {
+    "indentStyle": "tab",
+    "lineWidth": 100
+  },
+  "javascript": {
+    "formatter": {
+			"semicolons": "always",
+      "quoteStyle": "single",
+      "trailingCommas": "all"
+    },
+		"linter": {
+			"style": {
+				"useImportType": true
+			}
+		}
+  },
+  "json": {
+    "formatter": {
+      "enabled": false
+    }
+  },
+	"markdown": {
+    "formatter": {
+      "enabled": false
+    }
+  }
+}
diff --git a/build/snapshots.ts b/build/snapshots.ts
new file mode 100644
index 0000000..3a00602
--- /dev/null
+++ b/build/snapshots.ts
@@ -0,0 +1,18 @@
+import { basename, dirname, extname, join } from 'node:path';
+import { snapshot } from 'node:test';
+
+
+snapshot.setResolveSnapshotPath(generateSnapshotPath);
+/**
+ * @param testFilePath '/tmp/foo.test.js'
+ * @returns '/tmp/foo.test.snap.cjs'
+ */
+function generateSnapshotPath(testFilePath?: string) {
+  if (!testFilePath) return '';
+
+  const ext = extname(testFilePath);
+  const filename = basename(testFilePath, ext);
+  const base = dirname(testFilePath);
+
+  return join(base, `${filename}.snap.cjs`);
+}
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..6dda7bb
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,216 @@
+{
+  "name": "userland-migrations",
+  "version": "1.0.0",
+  "lockfileVersion": 3,
+  "requires": true,
+  "packages": {
+    "": {
+      "name": "userland-migrations",
+      "version": "1.0.0",
+      "license": "MIT",
+      "workspaces": [
+        "./recipes/*"
+      ],
+      "devDependencies": {
+        "@biomejs/biome": "^1.9.4",
+        "@types/node": "^22.9.1",
+        "typescript": "^5.6.3"
+      }
+    },
+    "node_modules/@biomejs/biome": {
+      "version": "1.9.4",
+      "resolved": "https://registry.npmjs.org/@biomejs/biome/-/biome-1.9.4.tgz",
+      "integrity": "sha512-1rkd7G70+o9KkTn5KLmDYXihGoTaIGO9PIIN2ZB7UJxFrWw04CZHPYiMRjYsaDvVV7hP1dYNRLxSANLaBFGpog==",
+      "dev": true,
+      "hasInstallScript": true,
+      "license": "MIT OR Apache-2.0",
+      "bin": {
+        "biome": "bin/biome"
+      },
+      "engines": {
+        "node": ">=14.21.3"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/biome"
+      },
+      "optionalDependencies": {
+        "@biomejs/cli-darwin-arm64": "1.9.4",
+        "@biomejs/cli-darwin-x64": "1.9.4",
+        "@biomejs/cli-linux-arm64": "1.9.4",
+        "@biomejs/cli-linux-arm64-musl": "1.9.4",
+        "@biomejs/cli-linux-x64": "1.9.4",
+        "@biomejs/cli-linux-x64-musl": "1.9.4",
+        "@biomejs/cli-win32-arm64": "1.9.4",
+        "@biomejs/cli-win32-x64": "1.9.4"
+      }
+    },
+    "node_modules/@biomejs/cli-darwin-arm64": {
+      "version": "1.9.4",
+      "resolved": "https://registry.npmjs.org/@biomejs/cli-darwin-arm64/-/cli-darwin-arm64-1.9.4.tgz",
+      "integrity": "sha512-bFBsPWrNvkdKrNCYeAp+xo2HecOGPAy9WyNyB/jKnnedgzl4W4Hb9ZMzYNbf8dMCGmUdSavlYHiR01QaYR58cw==",
+      "cpu": [
+        "arm64"
+      ],
+      "dev": true,
+      "license": "MIT OR Apache-2.0",
+      "optional": true,
+      "os": [
+        "darwin"
+      ],
+      "engines": {
+        "node": ">=14.21.3"
+      }
+    },
+    "node_modules/@biomejs/cli-darwin-x64": {
+      "version": "1.9.4",
+      "resolved": "https://registry.npmjs.org/@biomejs/cli-darwin-x64/-/cli-darwin-x64-1.9.4.tgz",
+      "integrity": "sha512-ngYBh/+bEedqkSevPVhLP4QfVPCpb+4BBe2p7Xs32dBgs7rh9nY2AIYUL6BgLw1JVXV8GlpKmb/hNiuIxfPfZg==",
+      "cpu": [
+        "x64"
+      ],
+      "dev": true,
+      "license": "MIT OR Apache-2.0",
+      "optional": true,
+      "os": [
+        "darwin"
+      ],
+      "engines": {
+        "node": ">=14.21.3"
+      }
+    },
+    "node_modules/@biomejs/cli-linux-arm64": {
+      "version": "1.9.4",
+      "resolved": "https://registry.npmjs.org/@biomejs/cli-linux-arm64/-/cli-linux-arm64-1.9.4.tgz",
+      "integrity": "sha512-fJIW0+LYujdjUgJJuwesP4EjIBl/N/TcOX3IvIHJQNsAqvV2CHIogsmA94BPG6jZATS4Hi+xv4SkBBQSt1N4/g==",
+      "cpu": [
+        "arm64"
+      ],
+      "dev": true,
+      "license": "MIT OR Apache-2.0",
+      "optional": true,
+      "os": [
+        "linux"
+      ],
+      "engines": {
+        "node": ">=14.21.3"
+      }
+    },
+    "node_modules/@biomejs/cli-linux-arm64-musl": {
+      "version": "1.9.4",
+      "resolved": "https://registry.npmjs.org/@biomejs/cli-linux-arm64-musl/-/cli-linux-arm64-musl-1.9.4.tgz",
+      "integrity": "sha512-v665Ct9WCRjGa8+kTr0CzApU0+XXtRgwmzIf1SeKSGAv+2scAlW6JR5PMFo6FzqqZ64Po79cKODKf3/AAmECqA==",
+      "cpu": [
+        "arm64"
+      ],
+      "dev": true,
+      "license": "MIT OR Apache-2.0",
+      "optional": true,
+      "os": [
+        "linux"
+      ],
+      "engines": {
+        "node": ">=14.21.3"
+      }
+    },
+    "node_modules/@biomejs/cli-linux-x64": {
+      "version": "1.9.4",
+      "resolved": "https://registry.npmjs.org/@biomejs/cli-linux-x64/-/cli-linux-x64-1.9.4.tgz",
+      "integrity": "sha512-lRCJv/Vi3Vlwmbd6K+oQ0KhLHMAysN8lXoCI7XeHlxaajk06u7G+UsFSO01NAs5iYuWKmVZjmiOzJ0OJmGsMwg==",
+      "cpu": [
+        "x64"
+      ],
+      "dev": true,
+      "license": "MIT OR Apache-2.0",
+      "optional": true,
+      "os": [
+        "linux"
+      ],
+      "engines": {
+        "node": ">=14.21.3"
+      }
+    },
+    "node_modules/@biomejs/cli-linux-x64-musl": {
+      "version": "1.9.4",
+      "resolved": "https://registry.npmjs.org/@biomejs/cli-linux-x64-musl/-/cli-linux-x64-musl-1.9.4.tgz",
+      "integrity": "sha512-gEhi/jSBhZ2m6wjV530Yy8+fNqG8PAinM3oV7CyO+6c3CEh16Eizm21uHVsyVBEB6RIM8JHIl6AGYCv6Q6Q9Tg==",
+      "cpu": [
+        "x64"
+      ],
+      "dev": true,
+      "license": "MIT OR Apache-2.0",
+      "optional": true,
+      "os": [
+        "linux"
+      ],
+      "engines": {
+        "node": ">=14.21.3"
+      }
+    },
+    "node_modules/@biomejs/cli-win32-arm64": {
+      "version": "1.9.4",
+      "resolved": "https://registry.npmjs.org/@biomejs/cli-win32-arm64/-/cli-win32-arm64-1.9.4.tgz",
+      "integrity": "sha512-tlbhLk+WXZmgwoIKwHIHEBZUwxml7bRJgk0X2sPyNR3S93cdRq6XulAZRQJ17FYGGzWne0fgrXBKpl7l4M87Hg==",
+      "cpu": [
+        "arm64"
+      ],
+      "dev": true,
+      "license": "MIT OR Apache-2.0",
+      "optional": true,
+      "os": [
+        "win32"
+      ],
+      "engines": {
+        "node": ">=14.21.3"
+      }
+    },
+    "node_modules/@biomejs/cli-win32-x64": {
+      "version": "1.9.4",
+      "resolved": "https://registry.npmjs.org/@biomejs/cli-win32-x64/-/cli-win32-x64-1.9.4.tgz",
+      "integrity": "sha512-8Y5wMhVIPaWe6jw2H+KlEm4wP/f7EW3810ZLmDlrEEy5KvBsb9ECEfu/kMWD484ijfQ8+nIi0giMgu9g1UAuuA==",
+      "cpu": [
+        "x64"
+      ],
+      "dev": true,
+      "license": "MIT OR Apache-2.0",
+      "optional": true,
+      "os": [
+        "win32"
+      ],
+      "engines": {
+        "node": ">=14.21.3"
+      }
+    },
+    "node_modules/@types/node": {
+      "version": "22.9.1",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-22.9.1.tgz",
+      "integrity": "sha512-p8Yy/8sw1caA8CdRIQBG5tiLHmxtQKObCijiAa9Ez+d4+PRffM4054xbju0msf+cvhJpnFEeNjxmVT/0ipktrg==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "undici-types": "~6.19.8"
+      }
+    },
+    "node_modules/typescript": {
+      "version": "5.6.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.6.3.tgz",
+      "integrity": "sha512-hjcS1mhfuyi4WW8IWtjP7brDrG2cuDZukyrYrSauoXGNgx0S7zceP07adYkJycEr56BOUTNPzbInooiN3fn1qw==",
+      "dev": true,
+      "license": "Apache-2.0",
+      "bin": {
+        "tsc": "bin/tsc",
+        "tsserver": "bin/tsserver"
+      },
+      "engines": {
+        "node": ">=14.17"
+      }
+    },
+    "node_modules/undici-types": {
+      "version": "6.19.8",
+      "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-6.19.8.tgz",
+      "integrity": "sha512-ve2KP6f/JnbPBFyobGHuerC9g1FYGn/F8n1LWTwNxCEzd6IfqTwUQcNXgEtmmQ6DlRrC1hrSrBnCZPokRrDHjw==",
+      "dev": true,
+      "license": "MIT"
+    }
+  }
+}
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..22610c8
--- /dev/null
+++ b/package.json
@@ -0,0 +1,35 @@
+{
+  "name": "userland-migrations",
+  "version": "1.0.0",
+  "description": "A collection of migration recipes for userland code.",
+  "main": "index.js",
+  "scripts": {
+    "test:e2e": "node --no-warnings --experimental-test-coverage --test-reporter=lcov --test-reporter-destination=./coverage.lcov --test-reporter=spec --test-reporter-destination=stdout --import './build/snapshots.ts' -test --test-coverage-include='recipes/**/*' --test-coverage-exclude='**/*.e2e.m(j|t)s' './packages/*/*.e2e.m(j|t)s'",
+    "test:lint": "biome lint ./recipes",
+    "test:types": "tsc",
+    "test:unit": "node --no-warnings --experimental-test-coverage --test-reporter=lcov --test-reporter-destination=./coverage.lcov --test-reporter=spec --test-reporter-destination=stdout --experimental-test-module-mocks --import './build/snapshots.ts' -test --test-coverage-include='recipes/**/*' --test-coverage-exclude='**/*.spec.m(j|t)s' --test-coverage-lines=0.8 './packages/*/*.spec.m(j|t)s'"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/nodejs/userland-migrations"
+  },
+  "keywords": [
+    "automation",
+    "codemod",
+    "migrations",
+    "node.js"
+  ],
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/nodejs/userland-migrations/issues"
+  },
+  "homepage": "https://nodejs.org/learn/userland-migrations",
+  "devDependencies": {
+    "@biomejs/biome": "^1.9.4",
+    "@types/node": "^22.9.1",
+    "typescript": "^5.6.3"
+  },
+  "workspaces": [
+    "./recipes/*"
+  ]
+}
diff --git a/tsconfig.json b/tsconfig.json
new file mode 100644
index 0000000..59abe38
--- /dev/null
+++ b/tsconfig.json
@@ -0,0 +1,39 @@
+{
+  "compilerOptions": {
+    "target": "ESNext",
+    // "moduleDetection": "force",
+
+    /* Modules */
+    "module": "NodeNext",
+    "rootDir": "./recipes/",
+    "moduleResolution": "nodenext",
+    "baseUrl": "./recipes/",
+    "allowImportingTsExtensions": true,
+    "resolvePackageJsonExports": true,
+    "resolvePackageJsonImports": true,
+    "resolveJsonModule": true,
+    "allowArbitraryExtensions": true,
+
+    /* JavaScript Support */
+    "allowJs": true,
+    "checkJs": true,
+
+    /* Emit */
+    "noEmit": true,
+
+    /* Interop Constraints */
+    "verbatimModuleSyntax": true,
+    "allowSyntheticDefaultImports": false,
+    "esModuleInterop": true,
+    "forceConsistentCasingInFileNames": true,
+
+    /* Type Checking */
+    "strict": true,
+    "noImplicitAny": true,
+    "strictNullChecks": false,
+    "strictFunctionTypes": true,
+
+    /* Completeness */
+    "skipLibCheck": true
+  }
+}