diff --git a/packages/tui/src/util/error.ts b/packages/tui/src/util/error.ts
index 757758a205..d420e65ae1 100644
--- a/packages/tui/src/util/error.ts
+++ b/packages/tui/src/util/error.ts
@@ -143,40 +143,3 @@ export function errorMessage(error: unknown): string {
   if (formatted) return formatted
   return "unknown error"
 }
-
-export function errorData(error: unknown) {
-  if (error instanceof Error) {
-    return {
-      type: error.name,
-      message: errorMessage(error),
-      stack: error.stack,
-      cause: error.cause === undefined ? undefined : errorFormat(error.cause),
-      formatted: errorFormat(error),
-    }
-  }
-
-  if (!isRecord(error)) {
-    return {
-      type: typeof error,
-      message: errorMessage(error),
-      formatted: errorFormat(error),
-    }
-  }
-
-  const data = Object.getOwnPropertyNames(error).reduce<Record<string, unknown>>((acc, key) => {
-    const value = error[key]
-    if (value === undefined) return acc
-    if (typeof value === "string" || typeof value === "number" || typeof value === "boolean") {
-      acc[key] = value
-      return acc
-    }
-    // oxlint-disable-next-line no-base-to-string -- intentional coercion of arbitrary error properties
-    acc[key] = value instanceof Error ? value.message : String(value)
-    return acc
-  }, {})
-
-  if (typeof data.message !== "string") data.message = errorMessage(error)
-  if (typeof data.type !== "string") data.type = error.constructor?.name
-  data.formatted = errorFormat(error)
-  return data
-}
diff --git a/packages/tui/test/util/error.test.ts b/packages/tui/test/util/error.test.ts
index 58d6e3c06a..a27c214c1a 100644
--- a/packages/tui/test/util/error.test.ts
+++ b/packages/tui/test/util/error.test.ts
@@ -1,25 +1,16 @@
 import { describe, expect, test } from "bun:test"
-import { errorData, errorFormat, errorMessage } from "../../src/util/error"
+import { errorFormat, errorMessage } from "../../src/util/error"
 
 describe("util.error", () => {
   test("formats native Error instances", () => {
     const err = new Error("boom")
     expect(errorMessage(err)).toBe("boom")
     expect(errorFormat(err)).toContain("boom")
-
-    const data = errorData(err)
-    expect(data.type).toBe("Error")
-    expect(data.message).toBe("boom")
-    expect(String(data.formatted)).toContain("boom")
   })
 
   test("extracts message from record-like values", () => {
     const err = { message: "bad input", code: "E_BAD" }
     expect(errorMessage(err)).toBe("bad input")
-
-    const data = errorData(err)
-    expect(data.message).toBe("bad input")
-    expect(data.code).toBe("E_BAD")
   })
 
   test("never returns bare {} for opaque object errors", () => {
@@ -41,9 +32,5 @@ describe("util.error", () => {
     }
 
     expect(errorMessage(err)).toBe("ResolveMessage: Cannot resolve module")
-
-    const data = errorData(err)
-    expect(data.message).toBe("ResolveMessage: Cannot resolve module")
-    expect(String(data.formatted)).toContain("ResolveMessage")
   })
 })