From 5b138df664a3ab7cb63480e8b1c8988e820938b1 Mon Sep 17 00:00:00 2001
From: mitchell <m@mjfs.us>
Date: Fri, 19 Jun 2026 14:33:56 -0400
Subject: [PATCH] refactor(errors): extract isErrorLike and use ExecaError
 class in tts

---
 src/errors.ts | 17 +++++++++++------
 src/tts.ts    |  4 ++--
 2 files changed, 13 insertions(+), 8 deletions(-)

diff --git a/src/errors.ts b/src/errors.ts
index a8e9e05..2eac281 100644
--- a/src/errors.ts
+++ b/src/errors.ts
@@ -1,13 +1,18 @@
 import { chalkStderr } from "chalk";
 import wrapAnsi from "wrap-ansi";
 
+export interface ErrorLike {
+  message: string;
+}
+
+export const isErrorLike = (err: unknown): err is ErrorLike =>
+  typeof err === "object" &&
+  err !== null &&
+  "message" in err &&
+  typeof err.message === "string";
+
 export function handleTopLevel(err: unknown) {
-  if (
-    typeof err === "object" &&
-    err !== null &&
-    "message" in err &&
-    typeof err.message === "string"
-  ) {
+  if (isErrorLike(err)) {
     if (process.stderr.isTTY) {
       const [columns] = process.stderr.getWindowSize();
       console.error(wrapAnsi(chalkStderr.red(err.message), columns));
diff --git a/src/tts.ts b/src/tts.ts
index 75f37b1..4e8c36c 100644
--- a/src/tts.ts
+++ b/src/tts.ts
@@ -8,7 +8,7 @@ import consumers from "node:stream/consumers";
 import util from "node:util";
 import { Readability } from "@mozilla/readability";
 import chalk from "chalk";
-import { execa } from "execa";
+import { ExecaError, execa } from "execa";
 import { Window } from "happy-dom";
 import wrapAnsi from "wrap-ansi";
 import { handleTopLevel } from "./errors";
@@ -151,7 +151,7 @@ async function main() {
   try {
     await execa({ cwd, shell: true })`sox ${files} output.wav`;
   } catch (err) {
-    if (err instanceof Object && "code" in err && err.code === "ENOENT") {
+    if (err instanceof ExecaError && err.code === "ENOENT") {
       console.error("Sox not found. Unable to combine outputs.");
       console.log(chalk.yellow(`Audio available in ${cwd}`));
       return;