diff --git a/packages/core/index.d.ts b/packages/core/index.d.ts
new file mode 100644
index 00000000..4f00a149
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+++ b/packages/core/index.d.ts
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+// Type definitions for @webpack-blocks/core 1.0.0
+// Project: webpack-blocks
+// Definitions by: Stephan Schneider <https://github.com/zcei>
+
+import { Configuration as WebpackConfig, Condition, Rule, Plugin } from 'webpack'
+
+export function createConfig(configSetter: Block[]): object
+export function group(configSetters: Block[]): Block
+export function env(envName: string, configSetters: Block[]): Block
+export function match(test: Condition | Condition[], configSetters: Block[]): Block
+export function when(condition: boolean, configSetter: Block[]): Block
+
+export interface BlockCreator {
+  (...args: any[]): Block
+}
+
+export interface Block {
+  (context: Object, util: WebpackBlockUtils): WebpackConfigUpdater
+}
+
+export interface WebpackConfigUpdater {
+  (previousConfig: WebpackConfig): WebpackConfig
+}
+
+/*~ You can declare types that are available via importing the module */
+export interface WebpackBlockUtils {
+    merge: (configSnippet: WebpackConfig) => WebpackConfigUpdater
+    addLoader: (loader: Rule) => WebpackConfigUpdater
+    addPlugin: (plugin: Plugin) => WebpackConfigUpdater
+}
diff --git a/packages/tslint/index.d.ts b/packages/tslint/index.d.ts
new file mode 100644
index 00000000..85cd5118
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+++ b/packages/tslint/index.d.ts
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+// Type definitions for @webpack-blocks/tslint 1.0.0
+// Project: webpack-blocks
+// Definitions by: Stephan Schneider <https://github.com/zcei>
+
+import { Block } from '@webpack-blocks/core'
+import { Configuration, ILinterOptions } from 'tslint'
+
+
+type TSLintLoaderOptions = ILinterOptions & {
+  configuration: Configuration.IConfigurationFile
+  tsConfigFile: string
+  typeCheck: boolean
+  emitErrors: boolean
+  failOnHint: boolean
+  fileOutput: {
+    dir: string
+    ext: string
+    clean: boolean
+    header: string
+    footer: string
+  }
+}
+
+declare function tslint(options: TSLintLoaderOptions): Block
+export = tslint
diff --git a/packages/typescript/index.d.ts b/packages/typescript/index.d.ts
new file mode 100644
index 00000000..3cadd27d
--- /dev/null
+++ b/packages/typescript/index.d.ts
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+// Type definitions for @webpack-blocks/typescript 1.0.0
+// Project: webpack-blocks
+// Definitions by: Stephan Schneider <https://github.com/zcei>
+
+import { Block } from '@webpack-blocks/core'
+
+import { LoaderConfig } from 'awesome-typescript-loader/dist/interfaces'
+
+declare function typescript (options: LoaderConfig): Block
+export = typescript
diff --git a/packages/webpack/index.d.ts b/packages/webpack/index.d.ts
new file mode 100644
index 00000000..7d7f5754
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+++ b/packages/webpack/index.d.ts
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+// Type definitions for @webpack-blocks/webpack 1.0.0
+// Project: webpack-blocks
+// Definitions by: Stephan Schneider <https://github.com/zcei>
+
+import {
+  createConfig,
+  group,
+  env,
+  match,
+  Block,
+  WebpackConfigUpdater
+} from '@webpack-blocks/core'
+import { Configuration, Plugin, Entry, Options, Resolve, Output } from 'webpack'
+export { createConfig, group, env, match }
+
+export function addPlugins(plugins: Plugin[]): Block
+export function customConfig(configSnippet: Configuration): Block
+export function defineConstants(constants: { [key: string]: any }): Block
+export function setEnv(envs: string[] | { [key: string]: any }): Block
+// TODO: support EntryFunc
+export function entryPoint(entry: string | string[] | Entry): Block
+export function performance(perfBudgetOptions: Options.Performance): Block
+export function resolve(config: Resolve): Block
+export function setContext(path: string): Block
+export function setDevTool(devtool: Options.Devtool): Block
+export function setOutput(output: string | Output): Block
+export function sourceMaps(devtool?: Options.Devtool): Block