diff --git a/.editorconfig b/.editorconfig
new file mode 100644
index 0000000..0816a09
--- /dev/null
+++ b/.editorconfig
@@ -0,0 +1,15 @@
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+indent_style = tab
+insert_final_newline = true
+max_line_length = 100
+trim_trailing_whitespace = true
+
+[*.json]
+indent_style = space
+
+[*.{yaml,yml}]
+indent_style = space
diff --git a/.github/CODEOWNERS b/.github/CODEOWNERS
new file mode 100644
index 0000000..5fae357
--- /dev/null
+++ b/.github/CODEOWNERS
@@ -0,0 +1 @@
+@nodejs/userland-migrations
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 3a706d7..4d42fd3 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -10,22 +10,28 @@ on:
 
 jobs:
   lint-and-types:
+    if: github.event.pull_request.draft == false
+
     runs-on: ubuntu-latest
 
     strategy:
       matrix:
-        node-version: [23.x]
+        node:
+          - version: 23.x
     steps:
-    - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # 4.2.2
-      with:
-        node-version: ${{ matrix.node-version }}
-        cache: 'npm'
-    - run: npm ci
-    - run: npm run lint
-    - run: npm run format
-    - run: npm run test:types
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # 4.2.2
+      - name: Set up Node.js ${{ matrix.node.version }}
+        uses: actions/setup-node@39370e3970a6d050c480ffad4ff0ed4d3fdee5af # 4.1.0
+        with:
+          node-version: ${{ matrix.node.version }}
+          cache: 'npm'
+      - run: npm ci
+      - run: node --run lint
+      - run: node --run type-check
 
   tests:
+    if: github.event.pull_request.draft == false
+
     strategy:
       fail-fast: false
       matrix:
@@ -41,12 +47,16 @@ jobs:
     runs-on: ${{ matrix.os }}
 
     steps:
-    - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # 4.2.2
-    - name: Set up Node.js ${{ matrix.node.version }}
-      uses: actions/setup-node@39370e3970a6d050c480ffad4ff0ed4d3fdee5af # 4.1.0
-      with:
-        node-version: ${{ matrix.node.version }}
-        cache: 'npm'
-    - run: npm ci
-    - run: npm run test:unit
-    - run: npm run test:e2e
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # 4.2.2
+      - name: Set up Node.js ${{ matrix.node.version }}
+        uses: actions/setup-node@39370e3970a6d050c480ffad4ff0ed4d3fdee5af # 4.1.0
+        with:
+          node-version: ${{ matrix.node.version }}
+          cache: 'npm'
+      - run: npm ci
+      - run: |
+          node \
+            --run test \
+            --test-coverage-lines=0.8 \
+            --test-reporter-destination=./coverage.lcov \
+            --test-reporter=lcov
diff --git a/.vscode/settings.json b/.vscode/settings.json
index 2d8ad4d..d3d7b2b 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -1,6 +1,11 @@
 {
     "editor.formatOnSave": true,
-    "editor.defaultFormatter": "biomejs.biome",
     "javascript.updateImportsOnFileMove.enabled": "always",
-    "typescript.updateImportsOnFileMove.enabled": "always"
-}
\ No newline at end of file
+    "typescript.updateImportsOnFileMove.enabled": "always",
+    "editor.formatOnPaste": true,
+    "editor.wordWrap": "wordWrapColumn",
+    "editor.wordWrapColumn": 100,
+    "[markdown]": {
+        "editor.wordWrap": "off"
+    }
+}
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index c47a179..efaf605 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -5,18 +5,18 @@ A recipe generally has a few things:
 * A `README.md` explaining its purpose and use (including any options, and required and optional
 files).
 * Tests via node's test runner (min coverage: 80%)
-  * unit tests  (file extension: `.spec.mjs` or `.spec.mts`)
-  * end-to-end test(s) for accepted use-cases (file extension: `.e2e.mjs` or `.e2e.mts`)
+  * unit tests
+  * end-to-end test(s) for accepted use-cases
+  * a `test` command in `package.json`; there may be sub-commands like `test:unit` & `test:e2e`, but there must be a parent that combines them.
+    * Include `--import='../../build/snapshots.mts` to standardise the filename (`${original_base_name}.snap.cjs`) across recipes.
+    * Ensure `--test-coverage-include` and `--test-coverage-exclude` are set correctly for the recipe's workspace. The root repo handles setting coverage rules like minimum line coverage.
 * 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.
 
-> [!NOTE]
-> 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`.
+New recipes are added under `./recipes` in their own folder, succinctly named for what they do. 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`.
 
 ## Before pushing a commit
 
-A convenient superset of checks is available via `node --run pre-commit`, which automatically fixes formatting and linting issues, checks types, and runs unit and end-to-end tests. Changes resulting from this should be committed.
+A convenient superset of checks is available via `node --run pre-commit`, which automatically fixes formatting and linting issues (that are safe to fix), checks types, and runs tests. Changes resulting from this should be committed.
diff --git a/biome.jsonc b/biome.jsonc
index 5ebe181..504d158 100644
--- a/biome.jsonc
+++ b/biome.jsonc
@@ -1,18 +1,26 @@
 {
   "$schema": "https://biomejs.dev/schemas/1.9.4/schema.json",
-  "formatter": {
-    "indentStyle": "tab",
-    "lineWidth": 100
+  "files": {
+    "ignore": [
+      "**/*.snap.cjs"
+    ]
+  },
+  "organizeImports": {
+    "enabled": false
   },
   // Rules for the linter
   "linter": {
     "rules": {
       "style": {
+        "noNonNullAssertion": "off",
+        "noParameterAssign": "off",
+        "noYodaExpression": "error",
         "useImportType": "error",
         "useNodeAssertStrict": "error",
         "useNodejsImportProtocol": "error"
       },
       "suspicious": {
+        "noAssignInExpressions": "off",
         "noExplicitAny": "error",
         "noEmptyBlock": "error",
         "noDuplicateAtImportRules": "error",
@@ -25,12 +33,16 @@
       },
       "nursery": {
         "noEnum": "error"
+      },
+      "performance": {
+        "recommended": true
       }
     }
   },
   // Language specific settings
   "javascript": {
     "formatter": {
+      "arrowParentheses": "always",
 			"semicolons": "always",
       "quoteStyle": "single",
       "trailingCommas": "all"
@@ -41,7 +53,8 @@
   },
   "json": {
     "formatter": {
-      "enabled": false
+      "enabled": true,
+      "indentStyle": "space"
     }
   },
   // VSC specific settings
diff --git a/package.json b/package.json
index e3a9658..34197d4 100644
--- a/package.json
+++ b/package.json
@@ -3,14 +3,11 @@
   "version": "1.0.0",
   "description": "A collection of migration recipes for userland code.",
   "scripts": {
-    "format:fix": "biome format --fix ./",
-    "format": "biome format ./",
     "lint:fix": "biome lint --fix ./",
     "lint": "biome lint ./",
-    "pre-commit": "node --run lint:fix; node --run format:fix; node --run test:types; node --run test:unit; node --run test:e2e",
-    "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.{mjs,mts}' './packages/*/*.e2e.{mjs,mts}'",
-    "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.{mjs,mts}' --test-coverage-lines=0.8 './packages/*/*.spec.{mjs,mts}'"
+    "pre-commit": "node --run lint:fix; node --run type-check; node --run test",
+    "test": "npm run test --workspaces -- --no-warnings --experimental-test-coverage --test-reporter=spec --test-reporter-destination=stdout",
+    "type-check": "tsc"
   },
   "repository": {
     "type": "git",
diff --git a/tsconfig.json b/tsconfig.json
index 3292d56..2a227e5 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -4,7 +4,7 @@
     "rootDir": "./",
 
     "target": "ESNext",
-    // "moduleDetection": "force",
+    "lib": ["ESNext"],
 
     /* Modules */
     "module": "NodeNext",
@@ -24,7 +24,7 @@
 
     /* Interop Constraints */
     "verbatimModuleSyntax": true,
-    "allowSyntheticDefaultImports": false,
+    "allowSyntheticDefaultImports": true,
     "esModuleInterop": true,
     "forceConsistentCasingInFileNames": true,
 
@@ -40,5 +40,28 @@
   "include": [
     "./build/",
     "./recipes/"
-  ]
+  ],
+  "exclude": [
+    "node_modules",
+    "**/build/**",
+    "**/fixtures/**",
+    "**/test/**",
+    "**/*.fixture.mjs",
+    "**/*.fixture.mts",
+    "**/*.fixture.js",
+    "**/*.fixture.ts",
+    "**/*.mock.mjs",
+    "**/*.e2e.mjs",
+    "**/*.e2e.mts",
+    "**/*.e2e.js",
+    "**/*.e2e.ts",
+    "**/*.spec.mjs",
+    "**/*.spec.mts",
+    "**/*.spec.js",
+    "**/*.spec.ts",
+    "**/*.test.mjs",
+    "**/*.test.mts",
+    "**/*.test.js",
+    "**/*.test.ts",
+  ],
 }