diff --git a/prototype/libs/babel.ts b/prototype/libs/babel.ts
deleted file mode 100644
index 23c12dedd30..00000000000
--- a/prototype/libs/babel.ts
+++ /dev/null
@@ -1,34 +0,0 @@
-import { Task, TaskUserOptions } from '../types';
-
-export interface BuildOptions {
-	copyFiles?: boolean;
-	extensions?: string[];
-	outputDir: string;
-}
-
-export function build(
-	options: TaskUserOptions,
-	{ copyFiles = true, extensions, outputDir }: BuildOptions,
-): Task {
-	const args = ['@in(0)', '--out-dir', '@out(0)'];
-
-	if (copyFiles) {
-		args.push('--copy-files');
-	}
-
-	if (Array.isArray(extensions)) {
-		args.push('--extensions', extensions.join(','));
-	}
-
-	return {
-		args,
-		binary: 'babel',
-		inputs: ['@root(sources)', '.babelrc.*', '/babel.config.*'],
-		options: {
-			...options,
-			debugOption: '--verbose',
-		},
-		outputs: [outputDir],
-		type: 'build',
-	};
-}
diff --git a/prototype/libs/eslint.ts b/prototype/libs/eslint.ts
deleted file mode 100644
index c05ded83242..00000000000
--- a/prototype/libs/eslint.ts
+++ /dev/null
@@ -1,47 +0,0 @@
-import { Task, TaskUserOptions } from '../types';
-
-export interface TestOptions {
-	cache?: boolean;
-	extensions?: string[];
-}
-
-export function test(options: TaskUserOptions, { cache = true, extensions }: TestOptions): Task {
-	const args = ['@in(0)', '@in(1)', '--report-unused-disable-directives'];
-
-	if (cache) {
-		args.push('--cache', '--cache-location', '@cache(.eslintcache)');
-	}
-
-	if (Array.isArray(extensions)) {
-		args.push('--ext', extensions.join(','));
-	}
-
-	return {
-		args,
-		binary: 'eslint',
-		inputs: ['@root(sources)', '@root(tests)', '.eslintrc.*', '/.eslintrc.*', '/.eslintignore'],
-		options: {
-			...options,
-			debugOption: '--debug',
-		},
-		outputs: [],
-		type: 'test',
-	};
-}
-
-export interface RunOptions {
-	fix?: boolean;
-	extensions?: string[];
-}
-
-export function run(options: TaskUserOptions, { fix, extensions }: RunOptions): Task {
-	const task = test(options, { cache: false, extensions });
-
-	task.type = 'run';
-
-	if (fix) {
-		task.args.push('--fix');
-	}
-
-	return task;
-}
diff --git a/prototype/libs/jest.ts b/prototype/libs/jest.ts
deleted file mode 100644
index 179ef704603..00000000000
--- a/prototype/libs/jest.ts
+++ /dev/null
@@ -1,27 +0,0 @@
-import { Task, TaskUserOptions } from '../types';
-
-export interface TestOptions {
-	cache?: boolean;
-	extensions?: string[];
-}
-
-export function test(options: TaskUserOptions, { cache = true, extensions }: TestOptions): Task {
-	const args = ['--testMatch', '@in(1)'];
-
-	if (cache) {
-		args.push('--cache', '--cacheDirectory', '@cache(jest/)');
-	}
-
-	return {
-		args,
-		binary: 'eslint',
-		inputs: ['@root(sources)', '@root(tests)', 'jest.config.*', '/jest.config.*'],
-		options: {
-			...options,
-			debugOption: '--debug',
-			watchOption: '--watch',
-		},
-		outputs: [],
-		type: 'test',
-	};
-}
diff --git a/prototype/libs/prettier.ts b/prototype/libs/prettier.ts
deleted file mode 100644
index 2e4a18022de..00000000000
--- a/prototype/libs/prettier.ts
+++ /dev/null
@@ -1,23 +0,0 @@
-import { Task, TaskType, TaskUserOptions } from '../types';
-
-function createTask(type: TaskType, options: TaskUserOptions, args: string[]): Task {
-	return {
-		args: ['@in(0)', '@in(1)', ...args],
-		binary: 'prettier',
-		inputs: ['@glob(sources)', '@glob(tests)', '/prettier.config.*', '/.prettierignore'],
-		options: {
-			...options,
-			debugOption: ['--loglevel', 'debug'],
-		},
-		outputs: [],
-		type,
-	};
-}
-
-export function run(options: TaskUserOptions): Task {
-	return createTask('run', options, ['--write']);
-}
-
-export function test(options: TaskUserOptions): Task {
-	return createTask('test', options, ['--check']);
-}
diff --git a/prototype/libs/typescript.ts b/prototype/libs/typescript.ts
deleted file mode 100644
index 6fabb595d4d..00000000000
--- a/prototype/libs/typescript.ts
+++ /dev/null
@@ -1,52 +0,0 @@
-import path from 'path';
-import { Task, TaskUserOptions } from '../types';
-
-export interface BuildOptions {
-	declarationDir?: string;
-	inputDir?: string;
-	outputDir: string;
-}
-
-export function build(
-	options: TaskUserOptions,
-	{ declarationDir, inputDir, outputDir }: BuildOptions,
-): Task {
-	return {
-		args: ['--build', '--pretty', inputDir ? path.join('@pid', inputDir) : '@pid'],
-		binary: 'tsc',
-		inputs: [
-			'@glob(sources)',
-			'@glob(tests)',
-			inputDir ? path.join(inputDir, 'tsconfig.json') : 'tsconfig.json',
-			'/tsconfig.json',
-			'/tsconfig.*.json',
-		],
-		metadata: {
-			declarationDir: declarationDir || outputDir,
-			inputDir,
-			outputDir,
-		},
-		options: {
-			...options,
-			debugOption: ['--extendedDiagnostics', '--listFiles', '--verbose'],
-			watchOption: ['--watch'],
-		},
-		outputs: [outputDir],
-		type: 'build',
-	};
-}
-
-export function test(options: TaskUserOptions): Task {
-	return {
-		args: ['--noEmit', '--pretty'],
-		binary: 'tsc',
-		inputs: ['/tsconfig.json', '/tsconfig.*.json'],
-		options: {
-			...options,
-			debugOption: ['--extendedDiagnostics', '--listFiles'],
-			watchOption: ['--watch'],
-		},
-		outputs: [],
-		type: 'test',
-	};
-}
diff --git a/prototype/tasks.ts b/prototype/tasks.ts
deleted file mode 100644
index f040a81e65e..00000000000
--- a/prototype/tasks.ts
+++ /dev/null
@@ -1,13 +0,0 @@
-abstract class Task {
-	args: string[] = [];
-
-	binary: string;
-
-	constructor(binary: string) {
-		this.binary = binary;
-	}
-}
-
-class BuildTask extends Task {}
-
-export function createBuildTask(bin: string, args: string[]) {}
diff --git a/prototype/types.ts b/prototype/types.ts
deleted file mode 100644
index 6186e6791ab..00000000000
--- a/prototype/types.ts
+++ /dev/null
@@ -1,29 +0,0 @@
-export type FileGroup = 'sources' | 'tests' | 'assets' | 'resources';
-
-export type FileGroupOperator = 'glob' | 'root' | 'dirs' | 'files';
-
-export type FileGroupInput = `${FileGroup}:${FileGroupOperator}`;
-
-export type Target = string & { __brand: 'target' };
-
-export type TaskType = 'build' | 'test' | 'run';
-
-export interface TaskUserOptions {
-	dependsOn?: Target[];
-	retryCount?: number;
-}
-
-export interface TaskOptions extends TaskUserOptions {
-	debugOption?: string | string[]; // --debug
-	watchOption?: string | string[]; // --watch
-}
-
-export interface Task {
-	args: string[];
-	binary: string;
-	inputs: string[];
-	metadata?: Record<string, unknown>;
-	options: TaskOptions;
-	outputs: string[];
-	type: TaskType;
-}