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diff --git a/vanilla/node_modules/@exodus/bytes/utf8.d.ts b/vanilla/node_modules/@exodus/bytes/utf8.d.ts
new file mode 100644
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+++ b/vanilla/node_modules/@exodus/bytes/utf8.d.ts
@@ -0,0 +1,96 @@
+/**
+ * UTF-8 encoding/decoding
+ *
+ * ```js
+ * import { utf8fromString, utf8toString } from '@exodus/bytes/utf8.js'
+ *
+ * // loose
+ * import { utf8fromStringLoose, utf8toStringLoose } from '@exodus/bytes/utf8.js'
+ * ```
+ *
+ * _These methods by design encode/decode BOM (codepoint `U+FEFF` Byte Order Mark) as-is._\
+ * _If you need BOM handling or detection, use `@exodus/bytes/encoding.js`_
+ *
+ * @module @exodus/bytes/utf8.js
+ */
+
+/// <reference types="node" />
+
+import type { OutputFormat, Uint8ArrayBuffer } from './array.js';
+
+/**
+ * Encode a string to UTF-8 bytes (strict mode)
+ *
+ * Throws on invalid Unicode (unpaired surrogates)
+ *
+ * This is similar to the following snippet (but works on all engines):
+ * ```js
+ * // Strict encode, requiring Unicode codepoints to be valid
+ * if (typeof string !== 'string' || !string.isWellFormed()) throw new TypeError()
+ * return new TextEncoder().encode(string)
+ * ```
+ *
+ * @param string - The string to encode
+ * @param format - Output format (default: 'uint8')
+ * @returns The encoded bytes
+ */
+export function utf8fromString(string: string, format?: 'uint8'): Uint8ArrayBuffer;
+export function utf8fromString(string: string, format: 'buffer'): Buffer;
+export function utf8fromString(string: string, format?: OutputFormat): Uint8ArrayBuffer | Buffer;
+
+/**
+ * Encode a string to UTF-8 bytes (loose mode)
+ *
+ * Replaces invalid Unicode (unpaired surrogates) with replacement codepoints `U+FFFD`
+ * per [WHATWG Encoding](https://encoding.spec.whatwg.org/) specification.
+ *
+ * _Such replacement is a non-injective function, is irreversable and causes collisions.\
+ * Prefer using strict throwing methods for cryptography applications._
+ *
+ * This is similar to the following snippet (but works on all engines):
+ * ```js
+ * // Loose encode, replacing invalid Unicode codepoints with U+FFFD
+ * if (typeof string !== 'string') throw new TypeError()
+ * return new TextEncoder().encode(string)
+ * ```
+ *
+ * @param string - The string to encode
+ * @param format - Output format (default: 'uint8')
+ * @returns The encoded bytes
+ */
+export function utf8fromStringLoose(string: string, format?: 'uint8'): Uint8ArrayBuffer;
+export function utf8fromStringLoose(string: string, format: 'buffer'): Buffer;
+export function utf8fromStringLoose(
+  string: string,
+  format?: OutputFormat
+): Uint8ArrayBuffer | Buffer;
+
+/**
+ * Decode UTF-8 bytes to a string (strict mode)
+ *
+ * Throws on invalid UTF-8 byte sequences
+ *
+ * This is similar to `new TextDecoder('utf-8', { fatal: true, ignoreBOM: true }).decode(arr)`,
+ * but works on all engines.
+ *
+ * @param arr - The bytes to decode
+ * @returns The decoded string
+ */
+export function utf8toString(arr: Uint8Array): string;
+
+/**
+ * Decode UTF-8 bytes to a string (loose mode)
+ *
+ * Replaces invalid UTF-8 byte sequences with replacement codepoints `U+FFFD`
+ * per [WHATWG Encoding](https://encoding.spec.whatwg.org/) specification.
+ *
+ * _Such replacement is a non-injective function, is irreversable and causes collisions.\
+ * Prefer using strict throwing methods for cryptography applications._
+ *
+ * This is similar to `new TextDecoder('utf-8', { ignoreBOM: true }).decode(arr)`,
+ * but works on all engines.
+ *
+ * @param arr - The bytes to decode
+ * @returns The decoded string
+ */
+export function utf8toStringLoose(arr: Uint8Array): string;