diff --git a/packages/docs/package.json b/packages/docs/package.json
index 52c0b3bb6..b29b6ce15 100644
--- a/packages/docs/package.json
+++ b/packages/docs/package.json
@@ -16,8 +16,9 @@
   "scripts": {
     "build": "tsx --tsconfig ./scripts/tsconfig.json ./build.mts",
     "clear": "docusaurus clear",
-    "deploy": "docusaurus deploy",
+    "deploy": "tsx --tsconfig ./scripts/tsconfig.json ./deploy.mts",
     "docusaurus": "docusaurus",
+    "lint": "tsx --tsconfig ./scripts/tsconfig.json ./lint.mts",
     "serve": "docusaurus serve",
     "start": "docusaurus start",
     "swizzle": "docusaurus swizzle",
diff --git a/packages/docs/scripts/build.mts b/packages/docs/scripts/build.mts
index f3d58a638..269ab11f8 100644
--- a/packages/docs/scripts/build.mts
+++ b/packages/docs/scripts/build.mts
@@ -11,11 +11,7 @@ const GENERATED_DOC_DIRECTORY_NAMES = [
   "eslint-config-isaacscript",
 ] as const;
 
-await buildScript(async ({ packageRoot, outDir }) => {
-  if (outDir === undefined) {
-    outDir = "dist"; // eslint-disable-line no-param-reassign
-  }
-
+await buildScript(async ({ packageRoot }) => {
   const generatedDocPaths = GENERATED_DOC_DIRECTORY_NAMES.map((directoryName) =>
     path.join(packageRoot, "docs", directoryName),
   );
diff --git a/packages/eslint-plugin-isaacscript/scripts/build.mts b/packages/eslint-plugin-isaacscript/scripts/build.mts
index 1fc0620f1..ef69b762a 100644
--- a/packages/eslint-plugin-isaacscript/scripts/build.mts
+++ b/packages/eslint-plugin-isaacscript/scripts/build.mts
@@ -14,7 +14,6 @@ await buildScript(async ({ outDir, packageRoot }) => {
     outDir,
     'Failed to get the "outDir" from the "tsconfig.json" file.',
   );
-  rm(outDir);
 
   await buildTypeScript(packageRoot);
   copyToMonorepoNodeModules(packageRoot, outDir);
diff --git a/packages/isaac-lua-polyfill/scripts/build.ts b/packages/isaac-lua-polyfill/scripts/build.ts
index 73ca44298..e2b88c09e 100644
--- a/packages/isaac-lua-polyfill/scripts/build.ts
+++ b/packages/isaac-lua-polyfill/scripts/build.ts
@@ -1,12 +1,5 @@
-import { buildScript, buildTypeScript, rm } from "isaacscript-common-node";
-import { assertDefined } from "isaacscript-common-ts";
-
-await buildScript(async ({ outDir, packageRoot }) => {
-  assertDefined(
-    outDir,
-    'Failed to get the "outDir" from the "tsconfig.json" file.',
-  );
-  rm(outDir);
+import { buildScript, buildTypeScript } from "isaacscript-common-node";
 
+await buildScript(async ({ packageRoot }) => {
   await buildTypeScript(packageRoot);
 });
diff --git a/packages/isaac-typescript-definitions/package.json b/packages/isaac-typescript-definitions/package.json
index 0c82663f6..e84cfb0c3 100644
--- a/packages/isaac-typescript-definitions/package.json
+++ b/packages/isaac-typescript-definitions/package.json
@@ -29,9 +29,9 @@
     "README.md"
   ],
   "scripts": {
-    "build": "tsx scripts/build.ts",
+    "build": "tsx --tsconfig ./scripts/tsconfig.json ./scripts/build.ts",
     "docs": "typedoc",
-    "lint": "tsx scripts/lint.ts"
+    "lint": "tsx --tsconfig ./scripts/tsconfig.json ./scripts/lint.ts"
   },
   "dependencies": {
     "lua-types": "^2.13.1"
diff --git a/packages/isaac-typescript-definitions/scripts/build.ts b/packages/isaac-typescript-definitions/scripts/build.ts
index ec1005cf1..b73cfe32d 100644
--- a/packages/isaac-typescript-definitions/scripts/build.ts
+++ b/packages/isaac-typescript-definitions/scripts/build.ts
@@ -1,13 +1,6 @@
-import { $, buildScript, buildTypeScript, rm } from "isaacscript-common-node";
-import { assertDefined } from "isaacscript-common-ts";
-
-await buildScript(async ({ outDir, packageRoot }) => {
-  assertDefined(
-    outDir,
-    'Failed to get the "outDir" from the "tsconfig.json" file.',
-  );
-  rm(outDir);
+import { $, buildScript, buildTypeScript } from "isaacscript-common-node";
 
+await buildScript(async ({ packageRoot }) => {
   const promises: Array<Promise<unknown>> = [];
 
   promises.push(
diff --git a/packages/isaac-typescript-definitions/tsconfig.json b/packages/isaac-typescript-definitions/tsconfig.json
index 5b306d9da..286a3bdd6 100644
--- a/packages/isaac-typescript-definitions/tsconfig.json
+++ b/packages/isaac-typescript-definitions/tsconfig.json
@@ -1,8 +1,6 @@
 {
-  "extends": [
-    "../isaacscript-tsconfig/tsconfig.base.json",
-    "../../tsconfig.monorepo.json",
-  ],
+  // We cannot extend from the monorepo TSConfig since TSTL will complain about "paths".
+  "extends": "../isaacscript-tsconfig/tsconfig.base.json",
 
   // https://www.typescriptlang.org/docs/handbook/compiler-options.html
   "compilerOptions": {
diff --git a/packages/isaacscript-cli/scripts/build.ts b/packages/isaacscript-cli/scripts/build.ts
index cf39209d2..fc5d204f8 100644
--- a/packages/isaacscript-cli/scripts/build.ts
+++ b/packages/isaacscript-cli/scripts/build.ts
@@ -1,22 +1,9 @@
-import {
-  $,
-  $s,
-  buildScript,
-  buildTypeScript,
-  rm,
-} from "isaacscript-common-node";
-import { assertDefined } from "isaacscript-common-ts";
+import { $, $s, buildScript, buildTypeScript } from "isaacscript-common-node";
 
 const TSCONFIG_SCHEMA_PATH = "schemas/tsconfig-isaacscript-section-schema.json";
 const ISAACSCRIPT_SCHEMA_PATH = "schemas/isaacscript-schema.json";
 
-await buildScript(async ({ outDir, packageRoot }) => {
-  assertDefined(
-    outDir,
-    'Failed to get the "outDir" from the "tsconfig.json" file.',
-  );
-  rm(outDir);
-
+await buildScript(async ({ packageRoot }) => {
   const promises: Array<Promise<unknown>> = [];
 
   promises.push(
diff --git a/packages/isaacscript-cli/src/commands/publish/validate.ts b/packages/isaacscript-cli/src/commands/publish/validate.ts
index 031781272..bd4326ef9 100644
--- a/packages/isaacscript-cli/src/commands/publish/validate.ts
+++ b/packages/isaacscript-cli/src/commands/publish/validate.ts
@@ -3,8 +3,8 @@ import {
   PACKAGE_JSON,
   fatalError,
   isFile,
-  isGitClean,
   isGitRepository,
+  isGitRepositoryClean,
   isLoggedInToNPM,
 } from "isaacscript-common-node";
 import { PROJECT_NAME } from "../../constants.js";
@@ -21,7 +21,7 @@ export function validate(
     );
   }
 
-  if (!isGitClean()) {
+  if (!isGitRepositoryClean()) {
     fatalError(
       "Failed to publish since the Git repository was dirty. Before publishing, you must push any current changes to git. (Version commits should not contain any code changes.)",
     );
diff --git a/packages/isaacscript-common-node/package.json b/packages/isaacscript-common-node/package.json
index ed2a9bbed..289355569 100644
--- a/packages/isaacscript-common-node/package.json
+++ b/packages/isaacscript-common-node/package.json
@@ -16,6 +16,17 @@
   "type": "module",
   "main": "./dist/index.js",
   "types": "./dist/index.d.ts",
+  "files": [
+    "dist",
+    "src",
+    "LICENSE",
+    "package.json",
+    "README.md"
+  ],
+  "scripts": {
+    "build": "tsx ./scripts/build.ts",
+    "lint": "tsx ./scripts/lint.ts"
+  },
   "dependencies": {
     "@arktype/fs": "^0.0.1",
     "chalk": "^5.3.0",
diff --git a/packages/isaacscript-common-node/scripts/build.sh b/packages/isaacscript-common-node/scripts/build.sh
deleted file mode 100644
index a7baf6045..000000000
--- a/packages/isaacscript-common-node/scripts/build.sh
+++ /dev/null
@@ -1,38 +0,0 @@
-#!/bin/bash
-
-set -euo pipefail # Exit on errors and undefined variables.
-
-# Get the directory of this script:
-# https://stackoverflow.com/questions/59895/getting-the-source-directory-of-a-bash-script-from-within
-DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
-
-# Get the name of the package:
-# https://stackoverflow.com/questions/23162299/how-to-get-the-last-part-of-dirname-in-bash/23162553
-PACKAGE_NAME="$(basename "$DIR")"
-
-echo "Building: $PACKAGE_NAME"
-
-SECONDS=0
-
-cd "$DIR"
-
-REPO_ROOT="$DIR/../.."
-OUT_DIR="$REPO_ROOT/dist/packages/$PACKAGE_NAME"
-
-rm -rf "$OUT_DIR"
-
-# Compile the project.
-npx tsc
-mv "$OUT_DIR/src" "$OUT_DIR/dist"
-
-# The source maps and declaration maps will be bugged due to the consolidated "dist" directory, so
-# we use a script to manually rewrite them.
-npx tsx "$REPO_ROOT/scripts/rewriteSourceMapDeclarationMapPaths.ts" "isaacscript-common-ts"
-
-# Copy the rest of the files needed for npm.
-cp "$DIR/LICENSE" "$OUT_DIR/"
-cp "$DIR/package.json" "$OUT_DIR/"
-cp "$DIR/README.md" "$OUT_DIR/"
-cp "$DIR/src" "$OUT_DIR/" --recursive
-
-echo "Successfully built $PACKAGE_NAME in $SECONDS seconds."
diff --git a/packages/isaacscript-common-node/scripts/build.ts b/packages/isaacscript-common-node/scripts/build.ts
new file mode 100644
index 000000000..e2b88c09e
--- /dev/null
+++ b/packages/isaacscript-common-node/scripts/build.ts
@@ -0,0 +1,5 @@
+import { buildScript, buildTypeScript } from "isaacscript-common-node";
+
+await buildScript(async ({ packageRoot }) => {
+  await buildTypeScript(packageRoot);
+});
diff --git a/packages/isaacscript-common-node/scripts/lint.sh b/packages/isaacscript-common-node/scripts/lint.sh
deleted file mode 100644
index 9a8c59648..000000000
--- a/packages/isaacscript-common-node/scripts/lint.sh
+++ /dev/null
@@ -1,32 +0,0 @@
-#!/bin/bash
-
-set -euo pipefail # Exit on errors and undefined variables.
-
-# Get the directory of this script:
-# https://stackoverflow.com/questions/59895/getting-the-source-directory-of-a-bash-script-from-within
-DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
-
-# Get the name of the package:
-# https://stackoverflow.com/questions/23162299/how-to-get-the-last-part-of-dirname-in-bash/23162553
-PACKAGE_NAME="$(basename "$DIR")"
-
-SECONDS=0
-
-cd "$DIR"
-
-# Use Prettier to check formatting.
-# "--log-level=warn" makes it only output errors.
-npx prettier --log-level=warn --ignore-path="$DIR/../../.prettierignore" --check .
-
-# Use ESLint to lint the TypeScript.
-# "--max-warnings 0" makes warnings fail in CI, since we set all ESLint errors to warnings.
-npx eslint --max-warnings 0 .
-
-# Check for unused files, dependencies, and exports.
-npx knip
-
-# Spell check every file using CSpell.
-# "--no-progress" and "--no-summary" make it only output errors.
-npx cspell --no-progress --no-summary .
-
-echo "Successfully linted $PACKAGE_NAME in $SECONDS seconds."
diff --git a/packages/isaacscript-common-node/scripts/lint.ts b/packages/isaacscript-common-node/scripts/lint.ts
new file mode 100644
index 000000000..b29e81b73
--- /dev/null
+++ b/packages/isaacscript-common-node/scripts/lint.ts
@@ -0,0 +1,9 @@
+import { $, lintScript } from "isaacscript-common-node";
+
+await lintScript(async () => {
+  const promises: Array<Promise<unknown>> = [];
+
+  promises.push($`tsc --noEmit`, $`eslint --max-warnings 0 .`);
+
+  await Promise.all(promises);
+});
diff --git a/packages/isaacscript-common-node/src/functions/scriptHelpers.ts b/packages/isaacscript-common-node/src/functions/scriptHelpers.ts
index dc4c70e00..40c3cbfe9 100644
--- a/packages/isaacscript-common-node/src/functions/scriptHelpers.ts
+++ b/packages/isaacscript-common-node/src/functions/scriptHelpers.ts
@@ -2,6 +2,7 @@
 
 import path from "node:path";
 import { dirOfCaller, findPackageRoot } from "./arkType.js";
+import { rm } from "./file.js";
 import { getElapsedSeconds } from "./time.js";
 import { getTSConfigJSONOutDir } from "./tsconfigJSON.js";
 import { getArgs } from "./utils.js";
@@ -15,9 +16,28 @@ interface ScriptCallbackData {
   outDir?: string;
 }
 
-/** See the documentation for the `script` helper function. */
+/**
+ * Removes the "outdir" directory specified in the "tsconfig.json" file (if it exists), then runs
+ * the provided logic.
+ *
+ * For more information, see the documentation for the `script` helper function.
+ */
 export async function buildScript(func: ScriptCallback): Promise<void> {
-  await script(func, "built", 2);
+  await script(
+    async (data) => {
+      const { outDir } = data;
+      if (outDir !== undefined) {
+        rm(outDir);
+      }
+
+      // We do not want to execute the `buildTypeScript` helper function automatically because the
+      // end-user might want to do that in parallel with other tasks.
+
+      await func(data);
+    },
+    "built",
+    2,
+  );
 }
 
 /** See the documentation for the `script` helper function. */
diff --git a/packages/isaacscript-common-ts/package.json b/packages/isaacscript-common-ts/package.json
index fb0bcfc59..ad4bdf78e 100644
--- a/packages/isaacscript-common-ts/package.json
+++ b/packages/isaacscript-common-ts/package.json
@@ -15,5 +15,17 @@
   "author": "Zamiell",
   "type": "module",
   "main": "./dist/index.js",
-  "types": "./dist/index.d.ts"
+  "types": "./dist/index.d.ts",
+  "files": [
+    "dist",
+    "src",
+    "LICENSE",
+    "package.json",
+    "README.md"
+  ],
+  "scripts": {
+    "build": "tsx ./scripts/build.ts",
+    "lint": "tsx ./scripts/lint.ts",
+    "test": "jest"
+  }
 }
diff --git a/packages/isaacscript-common-ts/scripts/build.sh b/packages/isaacscript-common-ts/scripts/build.sh
deleted file mode 100644
index a7baf6045..000000000
--- a/packages/isaacscript-common-ts/scripts/build.sh
+++ /dev/null
@@ -1,38 +0,0 @@
-#!/bin/bash
-
-set -euo pipefail # Exit on errors and undefined variables.
-
-# Get the directory of this script:
-# https://stackoverflow.com/questions/59895/getting-the-source-directory-of-a-bash-script-from-within
-DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
-
-# Get the name of the package:
-# https://stackoverflow.com/questions/23162299/how-to-get-the-last-part-of-dirname-in-bash/23162553
-PACKAGE_NAME="$(basename "$DIR")"
-
-echo "Building: $PACKAGE_NAME"
-
-SECONDS=0
-
-cd "$DIR"
-
-REPO_ROOT="$DIR/../.."
-OUT_DIR="$REPO_ROOT/dist/packages/$PACKAGE_NAME"
-
-rm -rf "$OUT_DIR"
-
-# Compile the project.
-npx tsc
-mv "$OUT_DIR/src" "$OUT_DIR/dist"
-
-# The source maps and declaration maps will be bugged due to the consolidated "dist" directory, so
-# we use a script to manually rewrite them.
-npx tsx "$REPO_ROOT/scripts/rewriteSourceMapDeclarationMapPaths.ts" "isaacscript-common-ts"
-
-# Copy the rest of the files needed for npm.
-cp "$DIR/LICENSE" "$OUT_DIR/"
-cp "$DIR/package.json" "$OUT_DIR/"
-cp "$DIR/README.md" "$OUT_DIR/"
-cp "$DIR/src" "$OUT_DIR/" --recursive
-
-echo "Successfully built $PACKAGE_NAME in $SECONDS seconds."
diff --git a/packages/isaacscript-common-ts/scripts/build.ts b/packages/isaacscript-common-ts/scripts/build.ts
new file mode 100644
index 000000000..e2b88c09e
--- /dev/null
+++ b/packages/isaacscript-common-ts/scripts/build.ts
@@ -0,0 +1,5 @@
+import { buildScript, buildTypeScript } from "isaacscript-common-node";
+
+await buildScript(async ({ packageRoot }) => {
+  await buildTypeScript(packageRoot);
+});
diff --git a/packages/isaacscript-common-ts/scripts/lint.sh b/packages/isaacscript-common-ts/scripts/lint.sh
deleted file mode 100644
index 9a8c59648..000000000
--- a/packages/isaacscript-common-ts/scripts/lint.sh
+++ /dev/null
@@ -1,32 +0,0 @@
-#!/bin/bash
-
-set -euo pipefail # Exit on errors and undefined variables.
-
-# Get the directory of this script:
-# https://stackoverflow.com/questions/59895/getting-the-source-directory-of-a-bash-script-from-within
-DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
-
-# Get the name of the package:
-# https://stackoverflow.com/questions/23162299/how-to-get-the-last-part-of-dirname-in-bash/23162553
-PACKAGE_NAME="$(basename "$DIR")"
-
-SECONDS=0
-
-cd "$DIR"
-
-# Use Prettier to check formatting.
-# "--log-level=warn" makes it only output errors.
-npx prettier --log-level=warn --ignore-path="$DIR/../../.prettierignore" --check .
-
-# Use ESLint to lint the TypeScript.
-# "--max-warnings 0" makes warnings fail in CI, since we set all ESLint errors to warnings.
-npx eslint --max-warnings 0 .
-
-# Check for unused files, dependencies, and exports.
-npx knip
-
-# Spell check every file using CSpell.
-# "--no-progress" and "--no-summary" make it only output errors.
-npx cspell --no-progress --no-summary .
-
-echo "Successfully linted $PACKAGE_NAME in $SECONDS seconds."
diff --git a/packages/isaacscript-common-ts/scripts/lint.ts b/packages/isaacscript-common-ts/scripts/lint.ts
new file mode 100644
index 000000000..b29e81b73
--- /dev/null
+++ b/packages/isaacscript-common-ts/scripts/lint.ts
@@ -0,0 +1,9 @@
+import { $, lintScript } from "isaacscript-common-node";
+
+await lintScript(async () => {
+  const promises: Array<Promise<unknown>> = [];
+
+  promises.push($`tsc --noEmit`, $`eslint --max-warnings 0 .`);
+
+  await Promise.all(promises);
+});
diff --git a/packages/isaacscript-common-ts/scripts/test.sh b/packages/isaacscript-common-ts/scripts/test.sh
deleted file mode 100644
index d8211215d..000000000
--- a/packages/isaacscript-common-ts/scripts/test.sh
+++ /dev/null
@@ -1,11 +0,0 @@
-#!/bin/bash
-
-set -euo pipefail # Exit on errors and undefined variables.
-
-# Get the directory of this script:
-# https://stackoverflow.com/questions/59895/getting-the-source-directory-of-a-bash-script-from-within
-DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
-
-cd "$DIR"
-
-npx jest
diff --git a/packages/isaacscript-common-ts/scripts/tsconfig.json b/packages/isaacscript-common-ts/scripts/tsconfig.json
new file mode 100644
index 000000000..06ff8b0a0
--- /dev/null
+++ b/packages/isaacscript-common-ts/scripts/tsconfig.json
@@ -0,0 +1,26 @@
+// This is a tsconfig.json intended to be used by scripts in the IsaacScript monorepo.
+{
+  "extends": [
+    "../../isaacscript-tsconfig/tsconfig.node.json",
+    "../../../tsconfig.monorepo.json",
+  ],
+
+  "include": [
+    "./**/*.js",
+    "./**/.*.js",
+    "./**/*.cjs",
+    "./**/.*.cjs",
+    "./**/*.mjs",
+    "./**/.*.mjs",
+    "./**/*.jsx",
+    "./**/.*.jsx",
+    "./**/*.ts",
+    "./**/.*.ts",
+    "./**/*.cts",
+    "./**/.*.cts",
+    "./**/*.mts",
+    "./**/.*.mts",
+    "./**/*.tsx",
+    "./**/.*.tsx",
+  ],
+}
diff --git a/packages/isaacscript-common-ts/tsconfig.json b/packages/isaacscript-common-ts/tsconfig.json
index 36dd3bd76..dc594a0db 100644
--- a/packages/isaacscript-common-ts/tsconfig.json
+++ b/packages/isaacscript-common-ts/tsconfig.json
@@ -35,5 +35,5 @@
     "./**/.*.tsx",
   ],
 
-  "exclude": ["dist"],
+  "exclude": ["dist", "scripts"],
 }
diff --git a/packages/isaacscript-common/package.json b/packages/isaacscript-common/package.json
index 12d00f285..b104e738b 100644
--- a/packages/isaacscript-common/package.json
+++ b/packages/isaacscript-common/package.json
@@ -21,13 +21,20 @@
   },
   "license": "GPL-3.0",
   "author": "Zamiell",
-  "type": "commonjs",
+  "type": "module",
   "main": "./dist/src/index",
   "types": "./dist/index.rollup.d.ts",
+  "files": [
+    "dist",
+    "src",
+    "LICENSE",
+    "package.json",
+    "README.md"
+  ],
   "scripts": {
-    "build": "tsx scripts/build.ts",
+    "build": "tsx ./scripts/build.ts",
     "docs": "typedoc",
-    "lint": "tsx scripts/lint.ts"
+    "lint": "tsx ./scripts/lint.ts"
   },
   "dependencies": {
     "isaac-typescript-definitions": "^37.0.1"
diff --git a/packages/isaacscript-common/scripts/build.sh b/packages/isaacscript-common/scripts/build.sh
deleted file mode 100644
index 5d6ca18fe..000000000
--- a/packages/isaacscript-common/scripts/build.sh
+++ /dev/null
@@ -1,68 +0,0 @@
-#!/bin/bash
-
-set -euo pipefail # Exit on errors and undefined variables.
-
-# Get the directory of this script:
-# https://stackoverflow.com/questions/59895/getting-the-source-directory-of-a-bash-script-from-within
-DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
-
-# Get the name of the package:
-# https://stackoverflow.com/questions/23162299/how-to-get-the-last-part-of-dirname-in-bash/23162553
-PACKAGE_NAME="$(basename "$DIR")"
-
-echo "Building: $PACKAGE_NAME"
-
-SECONDS=0
-
-cd "$DIR"
-
-REPO_ROOT="$DIR/../.."
-OUT_DIR="$REPO_ROOT/dist/packages/$PACKAGE_NAME"
-
-rm -rf "$OUT_DIR"
-
-# Compile the project using TSTL, which will generate ".lua" files and ".d.ts" files.
-npx tstl
-
-# The declaration maps will be bugged due to the consolidated "dist" directory, so we use a script
-# to manually rewrite them.
-npx tsx "$REPO_ROOT/scripts/rewriteSourceMapDeclarationMapPaths.ts" "isaacscript-common"
-
-# Scrub internal exports from the declaration file using the ".d.ts rollup" feature of API
-# Extractor: https://api-extractor.com/
-# If we did not use API Extractor, we would instead have to manually append "@internal" JSDoc tags
-# to every single private function in order for the TypeScript compiler to remove it from the
-# generated ".d.ts" file. API Extractor automatically knows which functions are public or private by
-# parsing the "index.ts" file, and generates a new ".d.ts" file with private exports removed. Note
-# that end-users can still manually import internal functions with e.g.
-# `import { RunInNFrames } from "isaacscript-common/dist/src/classes/features/other/RunInNFrames";
-# but by removing them from the ".d.ts" file, they will not appear as part of auto-complete, which
-# is good enough for our case. However, a downside of this method is that the declaration maps will
-# not work:
-# https://github.com/microsoft/rushstack/issues/1886
-# https://github.com/timocov/dts-bundle-generator/issues/218
-npx api-extractor run
-
-# API Extractor will make a "dist/tsdoc-metadata.json" file, which we don't need.
-rm -rf "$DIR/dist"
-
-# Copy the rest of the files needed for npm.
-cp "$DIR/LICENSE" "$OUT_DIR/"
-cp "$DIR/package.json" "$OUT_DIR/"
-cp "$DIR/README.md" "$OUT_DIR/"
-cp "$DIR/src" "$OUT_DIR/" --recursive
-
-# Bundle the entire library into one file specifically for Lua consumers. We also include
-# `isaac-typescript-definitions` in the bundled exports so that Lua users do not have to consume two
-# separate libraries.
-if [[ "${1-}" == "fast" ]]; then
-  echo "Skipping the Lua build due to the \"fast\" option being present."
-else
-  INDEX_LUA="$DIR/src/indexLua.ts"
-  cp "$DIR/src/index.ts" "$INDEX_LUA"
-  echo "export * from \"isaac-typescript-definitions\";" >> "$INDEX_LUA"
-  npx tstl --project "$DIR/tsconfig.bundle.json"
-  rm -f "$INDEX_LUA"
-fi
-
-echo "Successfully built $PACKAGE_NAME in $SECONDS seconds."
diff --git a/packages/isaacscript-common/scripts/build.ts b/packages/isaacscript-common/scripts/build.ts
new file mode 100644
index 000000000..0fa69fdde
--- /dev/null
+++ b/packages/isaacscript-common/scripts/build.ts
@@ -0,0 +1,63 @@
+import {
+  $,
+  $s,
+  appendFile,
+  buildScript,
+  buildTypeScript,
+  cp,
+  rm,
+} from "isaacscript-common-node";
+import { assertDefined } from "isaacscript-common-ts";
+import path from "node:path";
+
+await buildScript(async ({ packageRoot, outDir }) => {
+  assertDefined(
+    outDir,
+    'Failed to get the "outDir" from the "tsconfig.json" file.',
+  );
+
+  // In addition to the normal compilation, we want to bundle the entire library into one file
+  // specifically for Lua consumers. We also include `isaac-typescript-definitions` in the bundled
+  // exports so that Lua users do not have to consume two separate libraries.
+  const indexTSPath = path.join(packageRoot, "src", "index.ts");
+  const indexLuaTSPath = path.join(packageRoot, "src", "indexLua.ts");
+  cp(indexTSPath, indexLuaTSPath);
+  appendFile(indexLuaTSPath, 'export * from "isaac-typescript-definitions";');
+
+  const promises: Array<Promise<unknown>> = [];
+
+  promises.push(
+    // We need to create JavaScript files in addition to Lua files because we want this package to
+    // be usable in Jest tests.
+    buildTypeScript(packageRoot),
+    $`tstl`,
+    $`tstl --project tsconfig.bundle.json`,
+  );
+
+  await Promise.all(promises);
+
+  rm(indexLuaTSPath);
+
+  // Scrub internal exports from the declaration file using the ".d.ts rollup" feature of API
+  // Extractor: https://api-extractor.com/
+  // If we did not use API Extractor, we would instead have to manually append "@internal" JSDoc
+  // tags to every single private function in order for the TypeScript compiler to remove it from
+  // the generated ".d.ts" file. API Extractor automatically knows which functions are public or
+  // private by parsing the "index.ts" file, and generates a new ".d.ts" file with private exports
+  // removed. Note that end-users can still manually import internal functions with e.g. `import {
+  // RunInNFrames } from "isaacscript-common/dist/src/classes/features/other/RunInNFrames"; but by
+  // removing them from the ".d.ts" file, they will not appear as part of auto-complete, which is
+  // good enough for our case. However, a downside of this method is that the declaration maps will
+  // not work:
+  // https://github.com/microsoft/rushstack/issues/1886
+  // https://github.com/timocov/dts-bundle-generator/issues/218
+  $s`npx api-extractor run`;
+
+  // API Extractor will make a "dist/tsdoc-metadata.json" file, which we don't need.
+  const metadataJSONPath = path.join(
+    packageRoot,
+    outDir,
+    "tsdoc-metadata.json",
+  );
+  rm(metadataJSONPath);
+});
diff --git a/packages/isaacscript-common/scripts/lint.sh b/packages/isaacscript-common/scripts/lint.sh
deleted file mode 100644
index 9a8c59648..000000000
--- a/packages/isaacscript-common/scripts/lint.sh
+++ /dev/null
@@ -1,32 +0,0 @@
-#!/bin/bash
-
-set -euo pipefail # Exit on errors and undefined variables.
-
-# Get the directory of this script:
-# https://stackoverflow.com/questions/59895/getting-the-source-directory-of-a-bash-script-from-within
-DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
-
-# Get the name of the package:
-# https://stackoverflow.com/questions/23162299/how-to-get-the-last-part-of-dirname-in-bash/23162553
-PACKAGE_NAME="$(basename "$DIR")"
-
-SECONDS=0
-
-cd "$DIR"
-
-# Use Prettier to check formatting.
-# "--log-level=warn" makes it only output errors.
-npx prettier --log-level=warn --ignore-path="$DIR/../../.prettierignore" --check .
-
-# Use ESLint to lint the TypeScript.
-# "--max-warnings 0" makes warnings fail in CI, since we set all ESLint errors to warnings.
-npx eslint --max-warnings 0 .
-
-# Check for unused files, dependencies, and exports.
-npx knip
-
-# Spell check every file using CSpell.
-# "--no-progress" and "--no-summary" make it only output errors.
-npx cspell --no-progress --no-summary .
-
-echo "Successfully linted $PACKAGE_NAME in $SECONDS seconds."
diff --git a/packages/isaacscript-common/scripts/lint.ts b/packages/isaacscript-common/scripts/lint.ts
new file mode 100644
index 000000000..b29e81b73
--- /dev/null
+++ b/packages/isaacscript-common/scripts/lint.ts
@@ -0,0 +1,9 @@
+import { $, lintScript } from "isaacscript-common-node";
+
+await lintScript(async () => {
+  const promises: Array<Promise<unknown>> = [];
+
+  promises.push($`tsc --noEmit`, $`eslint --max-warnings 0 .`);
+
+  await Promise.all(promises);
+});
diff --git a/packages/isaacscript-common/scripts/tsconfig.json b/packages/isaacscript-common/scripts/tsconfig.json
new file mode 100644
index 000000000..06ff8b0a0
--- /dev/null
+++ b/packages/isaacscript-common/scripts/tsconfig.json
@@ -0,0 +1,26 @@
+// This is a tsconfig.json intended to be used by scripts in the IsaacScript monorepo.
+{
+  "extends": [
+    "../../isaacscript-tsconfig/tsconfig.node.json",
+    "../../../tsconfig.monorepo.json",
+  ],
+
+  "include": [
+    "./**/*.js",
+    "./**/.*.js",
+    "./**/*.cjs",
+    "./**/.*.cjs",
+    "./**/*.mjs",
+    "./**/.*.mjs",
+    "./**/*.jsx",
+    "./**/.*.jsx",
+    "./**/*.ts",
+    "./**/.*.ts",
+    "./**/*.cts",
+    "./**/.*.cts",
+    "./**/*.mts",
+    "./**/.*.mts",
+    "./**/*.tsx",
+    "./**/.*.tsx",
+  ],
+}
diff --git a/packages/isaacscript-common/src/indexLua.ts b/packages/isaacscript-common/src/indexLua.ts
new file mode 100644
index 000000000..e7951e810
--- /dev/null
+++ b/packages/isaacscript-common/src/indexLua.ts
@@ -0,0 +1,202 @@
+export * from "./classes/DefaultMap";
+export * from "./classes/ModFeature";
+export * from "./classes/ModUpgraded";
+export * from "./core/cachedClasses";
+export * from "./core/constants";
+export * from "./core/constantsFirstLast";
+export * from "./core/constantsVanilla";
+export * from "./core/upgradeMod";
+export * from "./enums/AmbushType";
+export * from "./enums/CornerType";
+export * from "./enums/HealthType";
+export * from "./enums/ISCFeature";
+export * from "./enums/LadderSubTypeCustom";
+export * from "./enums/ModCallbackCustom";
+export * from "./enums/MysteriousPaperEffect";
+export * from "./enums/PlayerStat";
+export * from "./enums/PocketItemType";
+export * from "./enums/RockAltType";
+export * from "./enums/SaveDataKey";
+export * from "./enums/SerializationType";
+export * from "./enums/SlotDestructionType";
+export * from "./functions/ambush";
+export * from "./functions/array";
+export * from "./functions/arrayLua";
+export * from "./functions/benchmark";
+export * from "./functions/bitSet128";
+export * from "./functions/bitwise";
+export * from "./functions/bombs";
+export * from "./functions/bosses";
+export * from "./functions/cards";
+export * from "./functions/challenges";
+export * from "./functions/characters";
+export * from "./functions/charge";
+export * from "./functions/chargeBar";
+export * from "./functions/collectibleTag";
+export * from "./functions/collectibles";
+export * from "./functions/color";
+export * from "./functions/console";
+export * from "./functions/curses";
+export * from "./functions/debugFunctions";
+export * from "./functions/decorators";
+export * from "./functions/deepCopy";
+export * from "./functions/deepCopyTests";
+export * from "./functions/dimensions";
+export * from "./functions/direction";
+export * from "./functions/doors";
+export * from "./functions/easing";
+export * from "./functions/effects";
+export * from "./functions/emptyRoom";
+export * from "./functions/entities";
+export * from "./functions/entitiesSpecific";
+export * from "./functions/entityTypes";
+export * from "./functions/enums";
+export * from "./functions/external";
+export * from "./functions/familiars";
+export * from "./functions/flag";
+export * from "./functions/frames";
+export * from "./functions/globals";
+export * from "./functions/gridEntities";
+export * from "./functions/gridEntitiesSpecific";
+export * from "./functions/gridIndex";
+export * from "./functions/hash";
+export * from "./functions/hex";
+export * from "./functions/input";
+export * from "./functions/isaacAPIClass";
+export * from "./functions/itemPool";
+export * from "./functions/jsonHelpers";
+export * from "./functions/jsonRoom";
+export * from "./functions/kColor";
+export * from "./functions/language";
+export * from "./functions/level";
+export * from "./functions/levelGrid";
+export * from "./functions/log";
+export * from "./functions/logEntities";
+export * from "./functions/logMisc";
+export * from "./functions/map";
+export * from "./functions/math";
+export * from "./functions/merge";
+export * from "./functions/mergeTests";
+export * from "./functions/minimap";
+export * from "./functions/modFeatures";
+export * from "./functions/newArray";
+export * from "./functions/nextStage";
+export * from "./functions/npcDataStructures";
+export * from "./functions/npcs";
+export * from "./functions/pickupVariants";
+export * from "./functions/pickups";
+export * from "./functions/pickupsSpecific";
+export * from "./functions/pills";
+export * from "./functions/playerCenter";
+export * from "./functions/playerCollectibles";
+export * from "./functions/playerDataStructures";
+export * from "./functions/playerHealth";
+export * from "./functions/playerIndex";
+export * from "./functions/playerTrinkets";
+export * from "./functions/players";
+export * from "./functions/pocketItems";
+export * from "./functions/positionVelocity";
+export * from "./functions/pressurePlate";
+export * from "./functions/projectiles";
+export * from "./functions/random";
+export * from "./functions/readOnly";
+export * from "./functions/render";
+export * from "./functions/revive";
+export * from "./functions/rng";
+export * from "./functions/rockAlt";
+export * from "./functions/roomData";
+export * from "./functions/roomGrid";
+export * from "./functions/roomShape";
+export * from "./functions/roomShapeWalls";
+export * from "./functions/roomTransition";
+export * from "./functions/rooms";
+export * from "./functions/run";
+export * from "./functions/seeds";
+export * from "./functions/serialization";
+export * from "./functions/set";
+export * from "./functions/slots";
+export * from "./functions/sort";
+export * from "./functions/sound";
+export * from "./functions/spawnCollectible";
+export * from "./functions/sprites";
+export * from "./functions/stage";
+export * from "./functions/stats";
+export * from "./functions/string";
+export * from "./functions/table";
+export * from "./functions/tears";
+export * from "./functions/transformations";
+export * from "./functions/trinketGive";
+export * from "./functions/trinkets";
+export * from "./functions/tstlClass";
+export * from "./functions/types";
+export * from "./functions/ui";
+export * from "./functions/utils";
+export * from "./functions/vector";
+export * from "./functions/versusScreen";
+export * from "./functions/weighted";
+export * from "./interfaces/ChargeBarSprites";
+export * from "./interfaces/Corner";
+export * from "./interfaces/CustomStageTSConfig";
+export * from "./interfaces/GridEntityCustomData";
+export * from "./interfaces/JSONRoomsFile";
+export * from "./interfaces/PlayerHealth";
+export * from "./interfaces/PlayerStats";
+export * from "./interfaces/PocketItemDescription";
+export * from "./interfaces/RoomDescription";
+export * from "./interfaces/SaveData";
+export * from "./interfaces/StageHistoryEntry";
+export * from "./interfaces/TSTLClassMetatable";
+export * from "./interfaces/TrinketSituation";
+export * from "./maps/cardNameToTypeMap";
+export * from "./maps/characterNameToTypeMap";
+export * from "./maps/collectibleNameToTypeMap";
+export * from "./maps/pillNameToEffectMap";
+export * from "./maps/roomNameToTypeMap";
+export * from "./maps/transformationNameToPlayerFormMap";
+export * from "./maps/trinketNameToTypeMap";
+export * from "./objects/colors";
+export * from "./objects/kColors";
+export * from "./types/AddSubtract";
+export * from "./types/AllButFirst";
+export * from "./types/AllButLast";
+export * from "./types/AnyClass";
+export * from "./types/AnyEntity";
+export * from "./types/AnyFunction";
+export * from "./types/AnyGridEntity";
+export * from "./types/CompositionTypeSatisfiesEnum";
+export * from "./types/ConversionHeartSubType";
+export * from "./types/Decrement";
+export * from "./types/ERange";
+export * from "./types/EntityID";
+export * from "./types/Expand";
+export * from "./types/FunctionTuple";
+export * from "./types/GridEntityID";
+export * from "./types/HasFunction";
+export * from "./types/IRange";
+export * from "./types/Immutable";
+export * from "./types/Increment";
+export * from "./types/LowercaseKeys";
+export * from "./types/NaturalNumbersLessThan";
+export * from "./types/NaturalNumbersLessThanOrEqualTo";
+export * from "./types/PickingUpItem";
+export * from "./types/PickupIndex";
+export * from "./types/PlayerIndex";
+export * from "./types/PossibleStatType";
+export * from "./types/PublicInterface";
+export * from "./types/ReadonlyMap";
+export * from "./types/ReadonlySet";
+export * from "./types/StartsWithLowercase";
+export * from "./types/StartsWithUppercase";
+export * from "./types/TSTLClass";
+export * from "./types/Tuple";
+export * from "./types/TupleKeys";
+export * from "./types/TupleToIntersection";
+export * from "./types/TupleToUnion";
+export * from "./types/TupleWithLengthBetween";
+export * from "./types/TupleWithMaxLength";
+export * from "./types/UnionToIntersection";
+export * from "./types/UppercaseKeys";
+export * from "./types/WeightedArray";
+export * from "./types/WidenLiteral";
+export * from "./types/Writable";
+export * from "isaac-typescript-definitions";
\ No newline at end of file
diff --git a/packages/isaacscript-common/tsconfig.bundle.json b/packages/isaacscript-common/tsconfig.bundle.json
index cac0ac0f4..c0f907b73 100644
--- a/packages/isaacscript-common/tsconfig.bundle.json
+++ b/packages/isaacscript-common/tsconfig.bundle.json
@@ -6,9 +6,6 @@
     // We want the only output to be the bundled Lua file.
     "declaration": false,
     "declarationMap": false,
-
-    // We want to slightly reduce the file size of the output.
-    "removeComments": true,
   },
 
   // TypeScriptToLua settings
@@ -22,12 +19,12 @@
       // A plugin to add an explanatory comment at the top of the compiled "main.lua" file (for
       // `isaacscript-common` specifically).
       {
-        "name": "../../dist/packages/isaacscript-cli/src/plugins/addIsaacScriptCommentHeaderCommon.js",
+        "name": "../isaacscript-cli/dist/plugins/addIsaacScriptCommentHeaderCommon.js",
       },
 
       // A plugin to make enums safe from global variables.
       {
-        "name": "../../dist/packages/isaacscript-cli/src/plugins/noExtendedEnums.js",
+        "name": "../isaacscript-cli/dist/plugins/noExtendedEnums.js",
       },
     ],
     "noHeader": true,
diff --git a/packages/isaacscript-common/tsconfig.json b/packages/isaacscript-common/tsconfig.json
index 0afe655fb..6455e90f7 100644
--- a/packages/isaacscript-common/tsconfig.json
+++ b/packages/isaacscript-common/tsconfig.json
@@ -1,8 +1,6 @@
 {
-  "extends": [
-    "../isaacscript-tsconfig/tsconfig.base.json",
-    "../../tsconfig.monorepo.json",
-  ],
+  // We cannot extend from the monorepo TSConfig since TSTL will complain about "paths".
+  "extends": "../isaacscript-tsconfig/tsconfig.base.json",
 
   // https://www.typescriptlang.org/docs/handbook/compiler-options.html
   "compilerOptions": {
@@ -51,7 +49,7 @@
     "./**/.*.tsx",
   ],
 
-  "exclude": ["dist"],
+  "exclude": ["dist", "scripts"],
 
   // TypeScriptToLua settings
   "tstl": {
@@ -60,7 +58,7 @@
     "luaPlugins": [
       // A plugin to make enums safe from global variables.
       {
-        "name": "../../dist/packages/isaacscript-cli/src/plugins/noExtendedEnums.js",
+        "name": "../isaacscript-cli/dist/plugins/noExtendedEnums.js",
       },
     ],
     "noHeader": true,
diff --git a/todo.txt b/todo.txt
index 8fb4c0da8..c5f6242c4 100644
--- a/todo.txt
+++ b/todo.txt
@@ -23,7 +23,6 @@ isaacscript-common --> isaac-typescript-definitions
 
 - remove all knip.jsonc
 - look through prePublish.ts
-- search for all "console.log" in scripts --> echo