fix: tame invalid config logging

src/infra/errors.ts

@@ -20,3 +20,13 @@ export function formatErrorMessage(err: unknown): string {
     return Object.prototype.toString.call(err);
   }
 }
+
+export function formatUncaughtError(err: unknown): string {
+  if (extractErrorCode(err) === "INVALID_CONFIG") {
+    return formatErrorMessage(err);
+  }
+  if (err instanceof Error) {
+    return err.stack ?? err.message ?? err.name;
+  }
+  return formatErrorMessage(err);
+}

src/infra/unhandled-rejections.ts

@@ -1,5 +1,7 @@
 import process from "node:process";
 
+import { formatUncaughtError } from "./errors.js";
+
 type UnhandledRejectionHandler = (reason: unknown) => boolean;
 
 const handlers = new Set<UnhandledRejectionHandler>();
@@ -28,10 +30,7 @@ export function isUnhandledRejectionHandled(reason: unknown): boolean {
 export function installUnhandledRejectionHandler(): void {
   process.on("unhandledRejection", (reason, _promise) => {
     if (isUnhandledRejectionHandled(reason)) return;
-    console.error(
-      "[clawdbot] Unhandled promise rejection:",
-      reason instanceof Error ? (reason.stack ?? reason.message) : reason,
-    );
+    console.error("[clawdbot] Unhandled promise rejection:", formatUncaughtError(reason));
     process.exit(1);
   });
 }