Fix excessive framework noise in error stack traces

Add AsyncLocalStorage to LINES_TO_IGNORE (removes OpenTelemetry noise)
Apply error stack trace filtering for createJsonErrorObject
Add test for framework stack trace filtering
Add changeset

This change improves readability of error traces in user-facing contexts
(Slack alerts, email notifications, API responses, run streams) by
filtering out internal framework noise that clutters error messages.

Author: omkardongre

.changeset/dry-taxis-wash.md

@@ -0,0 +1,5 @@
+---
+"@trigger.dev/core": patch
+---
+
+Improve user-facing error readability by filtering framework noise from stack traces

packages/core/src/v3/errors.ts

@@ -227,7 +227,9 @@ export function createJsonErrorObject(error: TaskRunError): SerializedError {
       return {
         name: enhancedError.name,
         message: enhancedError.message,
-        stackTrace: enhancedError.stackTrace,
+        stackTrace: correctErrorStackTrace(enhancedError.stackTrace, undefined, {
+          removeFirstLine: false,
+        }),
       };
     }
     case "STRING_ERROR": {
@@ -400,6 +402,7 @@ const LINES_TO_IGNORE = [
   /ZodIpc/,
   /startActiveSpan/,
   /processTicksAndRejections/,
+  /AsyncLocalStorage/,
 ];
 
 function correctStackTraceLine(line: string, projectDir?: string, isDev?: boolean) {

packages/core/test/errors.test.ts

@@ -0,0 +1,48 @@
+import { createJsonErrorObject } from "../src/v3/errors.js";
+import type { TaskRunError } from "../src/v3/schemas/common.js";
+
+describe("createJsonErrorObject", () => {
+  it("should filter internal framework noise from error stack traces", () => {
+    const taskRunError: TaskRunError = {
+      type: "BUILT_IN_ERROR",
+      name: "Error",
+      message: "Network error occurred",
+      stackTrace: `Error: Network error occurred
+    at fetchData (file:///src/trigger/utils/helper.ts:4:9)
+    at processResponse (file:///src/trigger/utils/helper.ts:9:10)
+    at parseResult (file:///src/trigger/utils/helper.ts:14:10)
+    at callAPI (file:///src/trigger/services/api.ts:6:10)
+    at localHelper (file:///src/trigger/example.ts:7:10)
+    at run (file:///src/trigger/example.ts:17:12)
+    at _tracer.startActiveSpan.attributes (file:///.npm/_npx/f51a09bd0abf5f10/node_modules/@trigger.dev/core/src/v3/workers/taskExecutor.ts:445:38)
+    at file:///.npm/_npx/f51a09bd0abf5f10/node_modules/@trigger.dev/core/src/v3/tracer.ts:137:24
+    at AsyncLocalStorage.run (node:async_hooks:346:14)
+    at AsyncLocalStorageContextManager.with (file:///.npm/_npx/f51a09bd0abf5f10/node_modules/@opentelemetry/context-async-hooks/src/AsyncLocalStorageContextManager.ts:40:36)`,
+    };
+
+    const jsonError = createJsonErrorObject(taskRunError);
+
+    // Should preserve user stack traces
+    expect(jsonError.stackTrace).toContain(
+      "at fetchData (file:///src/trigger/utils/helper.ts:4:9)"
+    );
+    expect(jsonError.stackTrace).toContain(
+      "at processResponse (file:///src/trigger/utils/helper.ts:9:10)"
+    );
+    expect(jsonError.stackTrace).toContain(
+      "at parseResult (file:///src/trigger/utils/helper.ts:14:10)"
+    );
+    expect(jsonError.stackTrace).toContain("at callAPI (file:///src/trigger/services/api.ts:6:10)");
+    expect(jsonError.stackTrace).toContain("at localHelper (file:///src/trigger/example.ts:7:10)");
+    expect(jsonError.stackTrace).toContain("at run (file:///src/trigger/example.ts:17:12)");
+
+    // Should filter framework noise
+    expect(jsonError.stackTrace).not.toContain("_tracer.startActiveSpan.attributes");
+    expect(jsonError.stackTrace).not.toContain("taskExecutor.ts");
+    expect(jsonError.stackTrace).not.toContain("tracer.ts");
+    expect(jsonError.stackTrace).not.toContain("AsyncLocalStorage.run");
+    expect(jsonError.stackTrace).not.toContain("AsyncLocalStorageContextManager");
+    expect(jsonError.stackTrace).not.toContain("node_modules/@trigger.dev/core");
+    expect(jsonError.stackTrace).not.toContain(".npm/_npx");
+  });
+});