refactor(errors): extract top-level error handling into shared utility

index.ts

@@ -2,11 +2,10 @@
 import util from "node:util";
 import { createOpenAICompatible } from "@ai-sdk/openai-compatible";
 import { streamText } from "ai";
-import chalk from "chalk";
-import wrapAnsi from "wrap-ansi";
 
 import { initConfig, loadConfig } from "./src/config";
 import { Conversation } from "./src/conversation";
+import { handleTopLevel } from "./src/errors";
 import Renderer from "./src/render";
 
 async function main() {
@@ -104,10 +103,4 @@ Review the above diff for any potential bugs, best practices, performance issues
   await renderer.renderStats(totalUsage);
 }
 
-main().catch((err) => {
-  if ("message" in err) {
-    const [columns] = process.stderr.getWindowSize();
-    console.error(wrapAnsi(chalk.red(err.message), columns));
-  } else console.log(err);
-  process.exit(1);
-});
+main().catch(handleTopLevel);

src/errors.ts

@@ -0,0 +1,22 @@
+import { chalkStderr } from "chalk";
+import wrapAnsi from "wrap-ansi";
+
+export function handleTopLevel(err: unknown) {
+  if (
+    typeof err === "object" &&
+    err !== null &&
+    "message" in err &&
+    typeof err.message === "string"
+  ) {
+    if (process.stderr.isTTY) {
+      const [columns] = process.stderr.getWindowSize();
+      console.error(wrapAnsi(chalkStderr.red(err.message), columns));
+    } else {
+      console.error(err.message);
+    }
+  } else {
+    console.error(String(err));
+  }
+
+  process.exit(1);
+}

tts.ts

@@ -11,6 +11,7 @@ import chalk from "chalk";
 import { execa } from "execa";
 import { Window } from "happy-dom";
 import wrapAnsi from "wrap-ansi";
+import { handleTopLevel } from "./src/errors";
 
 async function main() {
   const start = Date.now();
@@ -179,10 +180,4 @@ async function main() {
   })`mpv --pause output.wav`;
 }
 
-main().catch((err) => {
-  if ("message" in err) {
-    const [columns] = process.stderr.getWindowSize();
-    console.error(wrapAnsi(chalk.red(err.message), columns));
-  } else console.log(err);
-  process.exit(1);
-});
+main().catch(handleTopLevel);