diff --git a/src/lib/util/ansi.ts b/src/lib/util/ansi.ts
new file mode 100644
index 0000000..72665be
--- /dev/null
+++ b/src/lib/util/ansi.ts
@@ -0,0 +1,131 @@
+import { tryCatch, type Result } from '@maxmorozoff/try-catch-tuple';
+
+const encoder = new TextEncoder();
+
+export const ANSI = {
+  // Text Styles
+  RESET: '\x1B[0m',
+  BOLD: '\x1B[1m',
+  DIM: '\x1B[2m',
+  ITALIC: '\x1B[3m',
+  UNDERLINE: '\x1B[4m',
+  BLINK: '\x1B[5m',
+  REVERSE: '\x1B[7m',
+  HIDDEN: '\x1B[8m',
+
+  // Foreground Colors
+  BLACK: '\x1B[30m',
+  RED: '\x1B[31m',
+  GREEN: '\x1B[32m',
+  YELLOW: '\x1B[33m',
+  BLUE: '\x1B[34m',
+  MAGENTA: '\x1B[35m',
+  CYAN: '\x1B[36m',
+  WHITE: '\x1B[37m',
+
+  // Background Colors
+  BG_BLACK: '\x1B[40m',
+  BG_RED: '\x1B[41m',
+  BG_GREEN: '\x1B[42m',
+  BG_YELLOW: '\x1B[43m',
+  BG_BLUE: '\x1B[44m',
+  BG_MAGENTA: '\x1B[45m',
+  BG_CYAN: '\x1B[46m',
+  BG_WHITE: '\x1B[47m',
+
+  // Cursor Control
+  SAVE_CURSOR: '\x1B[s',
+  RESTORE_CURSOR: '\x1B[u',
+  CURSOR_TO: (x: number, y: number) => `\x1B[${y};${x}H`,
+  CURSOR_UP: (n = 1) => `\x1B[${n}A`,
+  CURSOR_DOWN: (n = 1) => `\x1B[${n}B`,
+  CURSOR_FORWARD: (n = 1) => `\x1B[${n}C`,
+  CURSOR_BACK: (n = 1) => `\x1B[${n}D`,
+
+  // Screen Control
+  CLEAR_SCREEN: '\x1B[2J',
+  CLEAR_LINE: '\x1B[2K',
+  CLEAR_END_LINE: '\x1B[0K',
+  CLEAR_START_LINE: '\x1B[1K',
+  CLEAR_BELOW: '\x1B[J',
+};
+
+export const ANSI_BUFFERS = {
+  // Static code buffers
+  RESET: encoder.encode(ANSI.RESET),
+  BOLD: encoder.encode(ANSI.BOLD),
+  DIM: encoder.encode(ANSI.DIM),
+  ITALIC: encoder.encode(ANSI.ITALIC),
+  UNDERLINE: encoder.encode(ANSI.UNDERLINE),
+  BLINK: encoder.encode(ANSI.BLINK),
+  REVERSE: encoder.encode(ANSI.REVERSE),
+  HIDDEN: encoder.encode(ANSI.HIDDEN),
+
+  // Colors
+  BLACK: encoder.encode(ANSI.BLACK),
+  RED: encoder.encode(ANSI.RED),
+  GREEN: encoder.encode(ANSI.GREEN),
+  YELLOW: encoder.encode(ANSI.YELLOW),
+  BLUE: encoder.encode(ANSI.BLUE),
+  MAGENTA: encoder.encode(ANSI.MAGENTA),
+  CYAN: encoder.encode(ANSI.CYAN),
+  WHITE: encoder.encode(ANSI.WHITE),
+
+  // Backgrounds
+  BG_BLACK: encoder.encode(ANSI.BG_BLACK),
+  BG_RED: encoder.encode(ANSI.BG_RED),
+  BG_GREEN: encoder.encode(ANSI.BG_GREEN),
+  BG_YELLOW: encoder.encode(ANSI.BG_YELLOW),
+  BG_BLUE: encoder.encode(ANSI.BG_BLUE),
+  BG_MAGENTA: encoder.encode(ANSI.BG_MAGENTA),
+  BG_CYAN: encoder.encode(ANSI.BG_CYAN),
+  BG_WHITE: encoder.encode(ANSI.BG_WHITE),
+
+  // Cursor Control
+  SAVE_CURSOR: encoder.encode(ANSI.SAVE_CURSOR),
+  RESTORE_CURSOR: encoder.encode(ANSI.RESTORE_CURSOR),
+  CLEAR_SCREEN: encoder.encode(ANSI.CLEAR_SCREEN),
+  CLEAR_LINE: encoder.encode(ANSI.CLEAR_LINE),
+  CLEAR_BELOW: encoder.encode(ANSI.CLEAR_BELOW),
+};
+
+type AnsiBufferKey = keyof typeof ANSI_BUFFERS;
+
+export async function writeAnsi(
+  codes: AnsiBufferKey[],
+  text?: string,
+  autoReset: boolean = true
+): Promise<Result<number, Error>> {
+  const buffers: Uint8Array[] = [];
+
+  // Add requested ANSI codes
+  for (const code of codes) {
+    buffers.push(ANSI_BUFFERS[code]);
+  }
+
+  // Add optional text
+  if (text) {
+    buffers.push(encoder.encode(text));
+  }
+
+  // Auto-reset if requested
+  if (autoReset && !codes.includes('RESET')) {
+    buffers.push(ANSI_BUFFERS.RESET);
+  }
+
+  // Combine all buffers into single write
+  const combined = new Uint8Array(
+    buffers.reduce((acc, buf) => acc + buf.length, 0)
+  );
+
+  let offset = 0;
+  for (const buf of buffers) {
+    combined.set(buf, offset);
+    offset += buf.length;
+  }
+
+  return tryCatch(() => Bun.write(Bun.stdout, combined));
+}
+
+// For CommonJS compatibility
+export default { ANSI, ANSI_BUFFERS, writeAnsi };