diff --git a/.gitignore b/.gitignore
index 3d7fc6ef..51ee0df3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,7 +1,8 @@
 .DS_Store
 node_modules
-esm
+mjs
 cjs
+types
 temp
 bun
 coverage
diff --git a/biome.json b/biome.json
index 10f04842..95c62eb9 100644
--- a/biome.json
+++ b/biome.json
@@ -1,5 +1,5 @@
 {
-	"$schema": "https://biomejs.dev/schemas/2.2.4/schema.json",
+	"$schema": "./node_modules/@biomejs/biome/configuration_schema.json",
 	"assist": {
 		"actions": {
 			"source": {
diff --git a/cli/build.ts b/cli/build.ts
new file mode 100644
index 00000000..1d52f7e7
--- /dev/null
+++ b/cli/build.ts
@@ -0,0 +1,78 @@
+import * as fs from "node:fs/promises";
+import { URL } from "node:url";
+import ts from "typescript";
+import { listFiles, listTsSourceStringLiterals } from "./util.ts";
+
+interface OutputPattern {
+	destDir: URL;
+	/** @example .mjs, .cjs */
+	ext: string;
+	compilerOptions: ts.CompilerOptions;
+}
+
+const outputPattens = new Set<OutputPattern>();
+outputPattens.add({
+	destDir: new URL("../mjs/", import.meta.url),
+	ext: ".mjs",
+	compilerOptions: {
+		target: ts.ScriptTarget.ESNext,
+		module: ts.ModuleKind.ESNext,
+	},
+});
+outputPattens.add({
+	destDir: new URL("../cjs/", import.meta.url),
+	ext: ".cjs",
+	compilerOptions: {
+		target: ts.ScriptTarget.ESNext,
+		module: ts.ModuleKind.CommonJS,
+	},
+});
+
+const srcDir = new URL("../src/", import.meta.url);
+const exclude = [/\.test\..*$/];
+const baseTsConfig = JSON.parse(
+	await fs.readFile(new URL("../tsconfig.json", import.meta.url), "utf8"),
+) as { compilerOptions: ts.CompilerOptions };
+
+for await (const fileUrl of listFiles(srcDir, exclude)) {
+	const relativePath = fileUrl.pathname.slice(srcDir.pathname.length);
+	const filePath = fileUrl.pathname.slice(srcDir.pathname.length);
+	if (filePath.endsWith(".ts")) {
+		const tsCode = await fs.readFile(fileUrl, "utf-8");
+		const tsSource = ts.createSourceFile(
+			filePath,
+			tsCode,
+			ts.ScriptTarget.ESNext,
+		);
+		const replaceList: Array<ts.StringLiteral> = [];
+		const ext = ".ts";
+		for (const node of listTsSourceStringLiterals(tsSource)) {
+			const importFromText = node.text;
+			if (importFromText.startsWith(".") && importFromText.endsWith(ext)) {
+				replaceList.push(node);
+			}
+		}
+		replaceList.sort((n1, n2) => n2.getFullStart() - n1.getFullStart());
+		for (const pattern of outputPattens) {
+			let code = tsCode;
+			for (const node of replaceList) {
+				const start = code.indexOf(node.text, node.getFullStart());
+				const end = start + node.text.length;
+				code = `${code.slice(0, end - ext.length)}${pattern.ext}${code.slice(end)}`;
+			}
+			const output = ts.transpileModule(code, {
+				compilerOptions: {
+					...baseTsConfig.compilerOptions,
+					...pattern.compilerOptions,
+				},
+			});
+			const destUrl = new URL(
+				filePath.replace(/\.ts$/, pattern.ext),
+				pattern.destDir,
+			);
+			await fs.mkdir(new URL(".", destUrl), { recursive: true });
+			await fs.writeFile(destUrl, output.outputText);
+		}
+		console.info(`done:${relativePath}`);
+	}
+}
diff --git a/cli/temp.ts b/cli/temp.ts
deleted file mode 100644
index 2daf3eb5..00000000
--- a/cli/temp.ts
+++ /dev/null
@@ -1,43 +0,0 @@
-import * as fs from "node:fs/promises";
-import { URL } from "node:url";
-import ts from "typescript";
-import { listFiles, listTsSourceStringLiterals } from "./util.ts";
-
-const srcDir = new URL("../src/", import.meta.url);
-const tempDir = new URL("../temp/", import.meta.url);
-const exclude = [/\.test\..*$/];
-
-await fs.mkdir(tempDir, { recursive: true });
-
-for await (const fileUrl of listFiles(tempDir)) {
-	await fs.unlink(fileUrl);
-}
-
-for await (const fileUrl of listFiles(srcDir, exclude)) {
-	const filePath = fileUrl.pathname.slice(srcDir.pathname.length);
-	if (filePath.endsWith(".ts")) {
-		let code = await fs.readFile(fileUrl, "utf-8");
-		const tsSource = ts.createSourceFile(
-			filePath,
-			code,
-			ts.ScriptTarget.ESNext,
-		);
-		const replaceList: Array<ts.StringLiteral> = [];
-		const ext = ".ts";
-		for (const node of listTsSourceStringLiterals(tsSource)) {
-			const importFromText = node.text;
-			if (importFromText.startsWith(".") && importFromText.endsWith(ext)) {
-				replaceList.push(node);
-			}
-		}
-		replaceList.sort((n1, n2) => n2.getFullStart() - n1.getFullStart());
-		for (const node of replaceList) {
-			const start = code.indexOf(node.text, node.getFullStart());
-			const end = start + node.text.length;
-			code = `${code.slice(0, end - ext.length)}.js${code.slice(end)}`;
-		}
-		const destUrl = new URL(filePath, tempDir);
-		await fs.mkdir(new URL(".", destUrl), { recursive: true });
-		await fs.writeFile(destUrl, code);
-	}
-}
diff --git a/package-lock.json b/package-lock.json
index 4e326df7..4164ea37 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9,16 +9,16 @@
 			"version": "3.0.1",
 			"license": "Apache-2.0",
 			"devDependencies": {
-				"@biomejs/biome": "2.2.4",
-				"@types/node": "24.5.2",
+				"@biomejs/biome": "2.2.5",
+				"@types/node": "24.7.2",
 				"npm-run-all": "4.1.5",
-				"typescript": "5.9.2"
+				"typescript": "5.9.3"
 			}
 		},
 		"node_modules/@biomejs/biome": {
-			"version": "2.2.4",
-			"resolved": "https://registry.npmjs.org/@biomejs/biome/-/biome-2.2.4.tgz",
-			"integrity": "sha512-TBHU5bUy/Ok6m8c0y3pZiuO/BZoY/OcGxoLlrfQof5s8ISVwbVBdFINPQZyFfKwil8XibYWb7JMwnT8wT4WVPg==",
+			"version": "2.2.5",
+			"resolved": "https://registry.npmjs.org/@biomejs/biome/-/biome-2.2.5.tgz",
+			"integrity": "sha512-zcIi+163Rc3HtyHbEO7CjeHq8DjQRs40HsGbW6vx2WI0tg8mYQOPouhvHSyEnCBAorfYNnKdR64/IxO7xQ5faw==",
 			"dev": true,
 			"license": "MIT OR Apache-2.0",
 			"bin": {
@@ -32,20 +32,20 @@
 				"url": "https://opencollective.com/biome"
 			},
 			"optionalDependencies": {
-				"@biomejs/cli-darwin-arm64": "2.2.4",
-				"@biomejs/cli-darwin-x64": "2.2.4",
-				"@biomejs/cli-linux-arm64": "2.2.4",
-				"@biomejs/cli-linux-arm64-musl": "2.2.4",
-				"@biomejs/cli-linux-x64": "2.2.4",
-				"@biomejs/cli-linux-x64-musl": "2.2.4",
-				"@biomejs/cli-win32-arm64": "2.2.4",
-				"@biomejs/cli-win32-x64": "2.2.4"
+				"@biomejs/cli-darwin-arm64": "2.2.5",
+				"@biomejs/cli-darwin-x64": "2.2.5",
+				"@biomejs/cli-linux-arm64": "2.2.5",
+				"@biomejs/cli-linux-arm64-musl": "2.2.5",
+				"@biomejs/cli-linux-x64": "2.2.5",
+				"@biomejs/cli-linux-x64-musl": "2.2.5",
+				"@biomejs/cli-win32-arm64": "2.2.5",
+				"@biomejs/cli-win32-x64": "2.2.5"
 			}
 		},
 		"node_modules/@biomejs/cli-darwin-arm64": {
-			"version": "2.2.4",
-			"resolved": "https://registry.npmjs.org/@biomejs/cli-darwin-arm64/-/cli-darwin-arm64-2.2.4.tgz",
-			"integrity": "sha512-RJe2uiyaloN4hne4d2+qVj3d3gFJFbmrr5PYtkkjei1O9c+BjGXgpUPVbi8Pl8syumhzJjFsSIYkcLt2VlVLMA==",
+			"version": "2.2.5",
+			"resolved": "https://registry.npmjs.org/@biomejs/cli-darwin-arm64/-/cli-darwin-arm64-2.2.5.tgz",
+			"integrity": "sha512-MYT+nZ38wEIWVcL5xLyOhYQQ7nlWD0b/4mgATW2c8dvq7R4OQjt/XGXFkXrmtWmQofaIM14L7V8qIz/M+bx5QQ==",
 			"cpu": [
 				"arm64"
 			],
@@ -60,9 +60,9 @@
 			}
 		},
 		"node_modules/@biomejs/cli-darwin-x64": {
-			"version": "2.2.4",
-			"resolved": "https://registry.npmjs.org/@biomejs/cli-darwin-x64/-/cli-darwin-x64-2.2.4.tgz",
-			"integrity": "sha512-cFsdB4ePanVWfTnPVaUX+yr8qV8ifxjBKMkZwN7gKb20qXPxd/PmwqUH8mY5wnM9+U0QwM76CxFyBRJhC9tQwg==",
+			"version": "2.2.5",
+			"resolved": "https://registry.npmjs.org/@biomejs/cli-darwin-x64/-/cli-darwin-x64-2.2.5.tgz",
+			"integrity": "sha512-FLIEl73fv0R7dI10EnEiZLw+IMz3mWLnF95ASDI0kbx6DDLJjWxE5JxxBfmG+udz1hIDd3fr5wsuP7nwuTRdAg==",
 			"cpu": [
 				"x64"
 			],
@@ -77,9 +77,9 @@
 			}
 		},
 		"node_modules/@biomejs/cli-linux-arm64": {
-			"version": "2.2.4",
-			"resolved": "https://registry.npmjs.org/@biomejs/cli-linux-arm64/-/cli-linux-arm64-2.2.4.tgz",
-			"integrity": "sha512-M/Iz48p4NAzMXOuH+tsn5BvG/Jb07KOMTdSVwJpicmhN309BeEyRyQX+n1XDF0JVSlu28+hiTQ2L4rZPvu7nMw==",
+			"version": "2.2.5",
+			"resolved": "https://registry.npmjs.org/@biomejs/cli-linux-arm64/-/cli-linux-arm64-2.2.5.tgz",
+			"integrity": "sha512-5DjiiDfHqGgR2MS9D+AZ8kOfrzTGqLKywn8hoXpXXlJXIECGQ32t+gt/uiS2XyGBM2XQhR6ztUvbjZWeccFMoQ==",
 			"cpu": [
 				"arm64"
 			],
@@ -94,9 +94,9 @@
 			}
 		},
 		"node_modules/@biomejs/cli-linux-arm64-musl": {
-			"version": "2.2.4",
-			"resolved": "https://registry.npmjs.org/@biomejs/cli-linux-arm64-musl/-/cli-linux-arm64-musl-2.2.4.tgz",
-			"integrity": "sha512-7TNPkMQEWfjvJDaZRSkDCPT/2r5ESFPKx+TEev+I2BXDGIjfCZk2+b88FOhnJNHtksbOZv8ZWnxrA5gyTYhSsQ==",
+			"version": "2.2.5",
+			"resolved": "https://registry.npmjs.org/@biomejs/cli-linux-arm64-musl/-/cli-linux-arm64-musl-2.2.5.tgz",
+			"integrity": "sha512-5Ov2wgAFwqDvQiESnu7b9ufD1faRa+40uwrohgBopeY84El2TnBDoMNXx6iuQdreoFGjwW8vH6k68G21EpNERw==",
 			"cpu": [
 				"arm64"
 			],
@@ -111,9 +111,9 @@
 			}
 		},
 		"node_modules/@biomejs/cli-linux-x64": {
-			"version": "2.2.4",
-			"resolved": "https://registry.npmjs.org/@biomejs/cli-linux-x64/-/cli-linux-x64-2.2.4.tgz",
-			"integrity": "sha512-orr3nnf2Dpb2ssl6aihQtvcKtLySLta4E2UcXdp7+RTa7mfJjBgIsbS0B9GC8gVu0hjOu021aU8b3/I1tn+pVQ==",
+			"version": "2.2.5",
+			"resolved": "https://registry.npmjs.org/@biomejs/cli-linux-x64/-/cli-linux-x64-2.2.5.tgz",
+			"integrity": "sha512-fq9meKm1AEXeAWan3uCg6XSP5ObA6F/Ovm89TwaMiy1DNIwdgxPkNwxlXJX8iM6oRbFysYeGnT0OG8diCWb9ew==",
 			"cpu": [
 				"x64"
 			],
@@ -128,9 +128,9 @@
 			}
 		},
 		"node_modules/@biomejs/cli-linux-x64-musl": {
-			"version": "2.2.4",
-			"resolved": "https://registry.npmjs.org/@biomejs/cli-linux-x64-musl/-/cli-linux-x64-musl-2.2.4.tgz",
-			"integrity": "sha512-m41nFDS0ksXK2gwXL6W6yZTYPMH0LughqbsxInSKetoH6morVj43szqKx79Iudkp8WRT5SxSh7qVb8KCUiewGg==",
+			"version": "2.2.5",
+			"resolved": "https://registry.npmjs.org/@biomejs/cli-linux-x64-musl/-/cli-linux-x64-musl-2.2.5.tgz",
+			"integrity": "sha512-AVqLCDb/6K7aPNIcxHaTQj01sl1m989CJIQFQEaiQkGr2EQwyOpaATJ473h+nXDUuAcREhccfRpe/tu+0wu0eQ==",
 			"cpu": [
 				"x64"
 			],
@@ -145,9 +145,9 @@
 			}
 		},
 		"node_modules/@biomejs/cli-win32-arm64": {
-			"version": "2.2.4",
-			"resolved": "https://registry.npmjs.org/@biomejs/cli-win32-arm64/-/cli-win32-arm64-2.2.4.tgz",
-			"integrity": "sha512-NXnfTeKHDFUWfxAefa57DiGmu9VyKi0cDqFpdI+1hJWQjGJhJutHPX0b5m+eXvTKOaf+brU+P0JrQAZMb5yYaQ==",
+			"version": "2.2.5",
+			"resolved": "https://registry.npmjs.org/@biomejs/cli-win32-arm64/-/cli-win32-arm64-2.2.5.tgz",
+			"integrity": "sha512-xaOIad4wBambwJa6mdp1FigYSIF9i7PCqRbvBqtIi9y29QtPVQ13sDGtUnsRoe6SjL10auMzQ6YAe+B3RpZXVg==",
 			"cpu": [
 				"arm64"
 			],
@@ -162,9 +162,9 @@
 			}
 		},
 		"node_modules/@biomejs/cli-win32-x64": {
-			"version": "2.2.4",
-			"resolved": "https://registry.npmjs.org/@biomejs/cli-win32-x64/-/cli-win32-x64-2.2.4.tgz",
-			"integrity": "sha512-3Y4V4zVRarVh/B/eSHczR4LYoSVyv3Dfuvm3cWs5w/HScccS0+Wt/lHOcDTRYeHjQmMYVC3rIRWqyN2EI52+zg==",
+			"version": "2.2.5",
+			"resolved": "https://registry.npmjs.org/@biomejs/cli-win32-x64/-/cli-win32-x64-2.2.5.tgz",
+			"integrity": "sha512-F/jhuXCssPFAuciMhHKk00xnCAxJRS/pUzVfXYmOMUp//XW7mO6QeCjsjvnm8L4AO/dG2VOB0O+fJPiJ2uXtIw==",
 			"cpu": [
 				"x64"
 			],
@@ -179,13 +179,13 @@
 			}
 		},
 		"node_modules/@types/node": {
-			"version": "24.5.2",
-			"resolved": "https://registry.npmjs.org/@types/node/-/node-24.5.2.tgz",
-			"integrity": "sha512-FYxk1I7wPv3K2XBaoyH2cTnocQEu8AOZ60hPbsyukMPLv5/5qr7V1i8PLHdl6Zf87I+xZXFvPCXYjiTFq+YSDQ==",
+			"version": "24.7.2",
+			"resolved": "https://registry.npmjs.org/@types/node/-/node-24.7.2.tgz",
+			"integrity": "sha512-/NbVmcGTP+lj5oa4yiYxxeBjRivKQ5Ns1eSZeB99ExsEQ6rX5XYU1Zy/gGxY/ilqtD4Etx9mKyrPxZRetiahhA==",
 			"dev": true,
 			"license": "MIT",
 			"dependencies": {
-				"undici-types": "~7.12.0"
+				"undici-types": "~7.14.0"
 			}
 		},
 		"node_modules/array-buffer-byte-length": {
@@ -1376,9 +1376,9 @@
 			}
 		},
 		"node_modules/typescript": {
-			"version": "5.9.2",
-			"resolved": "https://registry.npmjs.org/typescript/-/typescript-5.9.2.tgz",
-			"integrity": "sha512-CWBzXQrc/qOkhidw1OzBTQuYRbfyxDXJMVJ1XNwUHGROVmuaeiEm3OslpZ1RV96d7SKKjZKrSJu3+t/xlw3R9A==",
+			"version": "5.9.3",
+			"resolved": "https://registry.npmjs.org/typescript/-/typescript-5.9.3.tgz",
+			"integrity": "sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw==",
 			"dev": true,
 			"license": "Apache-2.0",
 			"bin": {
@@ -1405,9 +1405,9 @@
 			}
 		},
 		"node_modules/undici-types": {
-			"version": "7.12.0",
-			"resolved": "https://registry.npmjs.org/undici-types/-/undici-types-7.12.0.tgz",
-			"integrity": "sha512-goOacqME2GYyOZZfb5Lgtu+1IDmAlAEu5xnD3+xTzS10hT0vzpf0SPjkXwAw9Jm+4n/mQGDP3LO8CPbYROeBfQ==",
+			"version": "7.14.0",
+			"resolved": "https://registry.npmjs.org/undici-types/-/undici-types-7.14.0.tgz",
+			"integrity": "sha512-QQiYxHuyZ9gQUIrmPo3IA+hUl4KYk8uSA7cHrcKd/l3p1OTpZcM0Tbp9x7FAtXdAYhlasd60ncPpgu6ihG6TOA==",
 			"dev": true,
 			"license": "MIT"
 		},
diff --git a/package.json b/package.json
index b4d5a8d1..ae33af78 100644
--- a/package.json
+++ b/package.json
@@ -14,14 +14,17 @@
 	"homepage": "https://github.com/nlibjs/typing",
 	"repository": "https://github.com/nlibjs/typing",
 	"type": "module",
-	"main": "./esm/mod.js",
 	"exports": {
-		"import": "./esm/mod.js",
-		"require": "./cjs/mod.js"
+		"./package.json": "./package.json",
+		".": {
+			"import": "./mjs/mod.js",
+			"require": "./cjs/mod.js",
+			"types": "./types/mod.d.ts"
+		}
 	},
 	"files": [
 		"cjs",
-		"esm",
+		"mjs",
 		"!**/*.test.*"
 	],
 	"scripts": {
@@ -36,9 +39,8 @@
 		"lint": "biome check",
 		"build": "run-s build:*",
 		"build:index": "node cli/generate-index.ts",
-		"build:temp": "node cli/temp.ts",
-		"build:esm": "tsc --project tsconfig.esm.json",
-		"build:cjs": "tsc --project tsconfig.cjs.json",
+		"build:types": "tsc",
+		"build:code": "node cli/build.ts",
 		"version": "run-s version:*",
 		"version:changelog": "npx @nlib/changelog --output CHANGELOG.md",
 		"version:add-changelog": "git add CHANGELOG.md",
@@ -46,10 +48,10 @@
 		"version:add-jsr": "git add jsr.json"
 	},
 	"devDependencies": {
-		"@biomejs/biome": "2.2.4",
-		"@types/node": "24.5.2",
+		"@biomejs/biome": "2.2.5",
+		"@types/node": "24.7.2",
 		"npm-run-all": "4.1.5",
-		"typescript": "5.9.2"
+		"typescript": "5.9.3"
 	},
 	"renovate": {
 		"extends": [
diff --git a/tsconfig.cjs.json b/tsconfig.cjs.json
deleted file mode 100644
index 2cfb9b61..00000000
--- a/tsconfig.cjs.json
+++ /dev/null
@@ -1,12 +0,0 @@
-{
-	"extends": "./tsconfig.json",
-	"compilerOptions": {
-		"module": "CommonJS",
-		"moduleResolution": "Node",
-		"outDir": "cjs",
-		"noEmit": false,
-		"allowImportingTsExtensions": false
-	},
-	"include": ["./temp/**/*.ts"],
-	"exclude": ["**/*.test.*"]
-}
diff --git a/tsconfig.esm.json b/tsconfig.esm.json
deleted file mode 100644
index 006b2c26..00000000
--- a/tsconfig.esm.json
+++ /dev/null
@@ -1,12 +0,0 @@
-{
-	"extends": "./tsconfig.json",
-	"compilerOptions": {
-		"module": "NodeNext",
-		"moduleResolution": "NodeNext",
-		"outDir": "esm",
-		"noEmit": false,
-		"allowImportingTsExtensions": false
-	},
-	"include": ["./temp/**/*.ts"],
-	"exclude": ["**/*.test.*"]
-}
diff --git a/tsconfig.json b/tsconfig.json
index e3f8e447..bc2ddeaa 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -11,8 +11,9 @@
 		"noImplicitReturns": true,
 		"noUnusedLocals": true,
 		"noUnusedParameters": true,
-		"noEmit": true,
-		"allowImportingTsExtensions": true
+		"allowImportingTsExtensions": true,
+		"emitDeclarationOnly": true,
+		"outDir": "./types"
 	},
 	"include": ["./src/**/*.ts"]
 }
diff --git a/tsconfig.types.json b/tsconfig.types.json
new file mode 100644
index 00000000..c2040835
--- /dev/null
+++ b/tsconfig.types.json
@@ -0,0 +1,8 @@
+{
+	"extends": "./tsconfig.json",
+	"compilerOptions": {
+		"emitDeclarationOnly": true,
+		"outDir": "./types"
+	},
+	"exclude": ["**/*.test.*"]
+}