diff --git a/lib/types.ts b/lib/types.ts
new file mode 100644
index 0000000..4a982ea
--- /dev/null
+++ b/lib/types.ts
@@ -0,0 +1,26 @@
+export interface FaucetPlugin<T> {
+	(config: T[], assetManager: AssetManager, options: FaucetPluginOptions): FaucetPluginFunc
+}
+
+export interface FaucetPluginFunc {
+	(filepaths: string[]): Promise<unknown>
+}
+
+export interface FaucetPluginOptions {
+	sourcemaps: boolean,
+	compact: boolean
+}
+
+export interface AssetManager {
+	resolvePath: (path: string, opts?: ResolvePathOpts) => string
+	writeFile: (targetPath: string, content: Buffer, options: WriteFileOpts) => Promise<unknown>
+}
+
+export interface ResolvePathOpts {
+	enforceRelative?: boolean
+}
+
+export interface WriteFileOpts {
+	targetDir: string,
+	fingerprint?: boolean
+}