diff --git a/src/main/app/ipc-contracts/index.ts b/src/main/app/ipc-contracts/index.ts
index 7d412e1d..5c0e0698 100644
--- a/src/main/app/ipc-contracts/index.ts
+++ b/src/main/app/ipc-contracts/index.ts
@@ -15,6 +15,7 @@ export const IPC_CONTRACTS: { [K in InvokedMethod]: z.ZodType<InputOf<K>> } = {
   loadSnapshot: noInput,
   relaunchApp: noInput,
   reportUnsaved: z.strictObject({ unsaved: z.boolean() }),
+  copyText: z.strictObject({ text: z.string().max(100_000) }),
   saveViewState: z.strictObject({ key: z.string().min(1).max(200), value: z.json().refine((value) => JSON.stringify(value).length <= 4_000, "View state value is too large.") }),
   runningSessionCount: noInput,
   pickDirectory: noInput,
diff --git a/src/main/app/ipc-handlers.ts b/src/main/app/ipc-handlers.ts
index d09de26d..71940ee5 100644
--- a/src/main/app/ipc-handlers.ts
+++ b/src/main/app/ipc-handlers.ts
@@ -1,6 +1,6 @@
 import { bumpDataVersion, currentDataVersion } from "../services/data-version";
 import { createIpcGate } from "./ipc-gate";
-import { app, dialog, shell, type BrowserWindow } from "electron";
+import { app, dialog, shell, type BrowserWindow, clipboard } from "electron";
 import type { DatabaseConnection } from "../database/connection";
 import { IPC_CHANNELS } from "../../shared/ipc";
 import { fail, ok, type DesktopResult } from "../../shared/result";
@@ -159,6 +159,10 @@ export function registerIpcHandlers(deps: IpcDeps): void {
     }
   });
   handle("completeSetup", (input) => mutate(() => completeSetup(deps.connection.db, input.orgId)));
+  handle("copyText", (input) => {
+    clipboard.writeText(input.text);
+    return ok(null);
+  });
   handle("saveViewState", (input) => {
     try {
       saveViewState(deps.connection.db, input.key, input.value);
diff --git a/src/preload/index.ts b/src/preload/index.ts
index cf2e3a26..20d21400 100644
--- a/src/preload/index.ts
+++ b/src/preload/index.ts
@@ -11,6 +11,7 @@ const api: DesktopApi = {
   relaunchApp: () => invoke(IPC_CHANNELS.relaunchApp),
   reportUnsaved: (input) => invoke(IPC_CHANNELS.reportUnsaved, input),
   saveViewState: (input) => invoke(IPC_CHANNELS.saveViewState, input),
+  copyText: (input) => invoke(IPC_CHANNELS.copyText, input),
   saveOnboardingDraft: (input) => invoke(IPC_CHANNELS.saveOnboardingDraft, input),
   completeSetup: (input) => invoke(IPC_CHANNELS.completeSetup, input),
   runningSessionCount: () => invoke(IPC_CHANNELS.runningSessionCount),
diff --git a/src/renderer/src/app/OnboardingConnectorsStep.tsx b/src/renderer/src/app/OnboardingConnectorsStep.tsx
index 5a03a124..d21d43b2 100644
--- a/src/renderer/src/app/OnboardingConnectorsStep.tsx
+++ b/src/renderer/src/app/OnboardingConnectorsStep.tsx
@@ -1,3 +1,4 @@
+import { ErrorText } from "../shared/ErrorText";
 import { AccountSyncNote } from "../pages/connectors/AccountSyncNote";
 import { SignInStatus } from "../pages/connectors/SignInStatus";
 import { useMemo } from "react";
@@ -39,24 +40,7 @@ export function ConnectorsStep({
   return (
     <div className="form-grid">
       <h2 className="page-h1">{t("Connectors")}</h2>
-      {catalog.phase === "error" && (
-        <div className="row" style={{ gap: 10 }}>
-          <span
-            style={{
-              color: "var(--text-2)",
-              fontSize: 13,
-              flex: 1,
-              minWidth: 0,
-              overflow: "hidden",
-              textOverflow: "ellipsis",
-              whiteSpace: "nowrap",
-            }}
-          >
-            {catalog.message}
-          </span>
-          <Button size="small" onClick={retry}>{t("Retry")}</Button>
-        </div>
-      )}
+      {catalog.phase === "error" && <ErrorText message={catalog.message} action={{ label: t("Retry"), onClick: retry }} />}
       {catalog.phase === "ready" && (
         <div style={{ maxHeight: 420, overflowY: "auto", paddingRight: 4 }}>
           <ToolkitCatalog
@@ -69,19 +53,7 @@ export function ConnectorsStep({
       )}
       {signIn && <SignInStatus signIn={signIn} onStop={stopWaiting} onCheckAgain={checkAgain} />}
       <AccountSyncNote sync={accountSync} onRetry={syncAccounts} />
-      {connectError && (
-        <div
-          style={{
-            color: "var(--red)",
-            fontSize: 13,
-            overflow: "hidden",
-            textOverflow: "ellipsis",
-            whiteSpace: "nowrap",
-          }}
-        >
-          {connectError}
-        </div>
-      )}
+      {connectError && <ErrorText message={connectError} />}
       <div className="modal-actions" style={{ marginTop: 4 }}>
         <Button tone="primary" onClick={onFinish}>{t("Finish")}</Button>
       </div>
diff --git a/src/renderer/src/i18n/zh.ts b/src/renderer/src/i18n/zh.ts
index 0c433915..67660f1c 100644
--- a/src/renderer/src/i18n/zh.ts
+++ b/src/renderer/src/i18n/zh.ts
@@ -698,6 +698,9 @@ export const zh: Record<string, string> = {
   "Working…": "处理中…",
   "Waiting for the {name} sign-in in your browser (check {check} of {checks}).": "正在等待你在浏览器中完成 {name} 登录（第 {check}/{checks} 次检查）。",
   "Stop waiting": "停止等待",
+  "Copy": "复制",
+  "Copied": "已复制",
+  "Copy failed": "复制失败",
   "Checking account status with Composio…": "正在向 Composio 核对账号状态…",
   "Account status checked with Composio at {time}.": "已于 {time} 向 Composio 核对账号状态。",
   "Account status could not be checked with Composio: {reason}. The statuses below may be out of date.": "无法向 Composio 核对账号状态：{reason}。下方状态可能已过时。",
diff --git a/src/renderer/src/pages/ConnectorsPage.tsx b/src/renderer/src/pages/ConnectorsPage.tsx
index dd6a874f..1678b8bf 100644
--- a/src/renderer/src/pages/ConnectorsPage.tsx
+++ b/src/renderer/src/pages/ConnectorsPage.tsx
@@ -1,7 +1,7 @@
+import { ErrorText } from "../shared/ErrorText";
 import { AccountSyncNote } from "./connectors/AccountSyncNote";
 import { SignInStatus } from "./connectors/SignInStatus";
 import { useMemo } from "react";
-import { Button } from "../shared/ui";
 import { t } from "../i18n/i18n";
 import type { PageProps } from "./types";
 import { activeOrgId, requireActiveEmployee } from "./types";
@@ -48,20 +48,7 @@ export function ConnectorsPage({ snapshot, actions }: PageProps) {
     <div style={{ maxWidth: 1060 }}>
       <h2 style={{ margin: "0 0 18px", fontSize: 16, fontWeight: 600 }}>{t("Connectors")}</h2>
 
-      {connectError && (
-        <div
-          style={{
-            color: "var(--text-2)",
-            fontSize: 13,
-            marginBottom: 14,
-            overflow: "hidden",
-            textOverflow: "ellipsis",
-            whiteSpace: "nowrap",
-          }}
-        >
-          {connectError}
-        </div>
-      )}
+      {connectError && <ErrorText message={connectError} />}
 
       {signIn && <SignInStatus signIn={signIn} onStop={stopWaiting} onCheckAgain={checkAgain} />}
       <AccountSyncNote sync={accountSync} onRetry={syncAccounts} />
@@ -79,24 +66,7 @@ export function ConnectorsPage({ snapshot, actions }: PageProps) {
         onRevoke={revoke}
       />
 
-      {catalog.phase === "error" && (
-        <div className="row" style={{ gap: 10, padding: "24px 0" }}>
-          <span
-            style={{
-              color: "var(--text-2)",
-              fontSize: 13,
-              flex: 1,
-              minWidth: 0,
-              overflow: "hidden",
-              textOverflow: "ellipsis",
-              whiteSpace: "nowrap",
-            }}
-          >
-            {catalog.message}
-          </span>
-          <Button size="small" onClick={retry}>{t("Retry")}</Button>
-        </div>
-      )}
+      {catalog.phase === "error" && <ErrorText message={catalog.message} action={{ label: t("Retry"), onClick: retry }} />}
       {catalog.phase === "ready" && (
         <ToolkitCatalog
           entries={catalog.entries}
diff --git a/src/renderer/src/shared/ErrorText.tsx b/src/renderer/src/shared/ErrorText.tsx
new file mode 100644
index 00000000..3391bec5
--- /dev/null
+++ b/src/renderer/src/shared/ErrorText.tsx
@@ -0,0 +1,26 @@
+import { useState } from "react";
+import { Button } from "./ui";
+import { t } from "../i18n/i18n";
+
+/** A failure reason shown whole (wrapped, never cut) with a way to copy it, so the full cause can be read or passed on. */
+export function ErrorText({ message, action }: { message: string; action?: { label: string; onClick: () => void } }) {
+  // The copy result belongs to the message it was for; a new message starts fresh.
+  const [copied, setCopied] = useState<{ message: string; ok: boolean } | null>(null);
+  const copy = copied && copied.message === message ? (copied.ok ? "copied" : "failed") : "idle";
+  const copyMessage = () => {
+    void window.agentCompany.copyText({ text: message }).then((result) => {
+      if (!result.ok) console.error(`[errors] copy failed: ${result.error.message}`);
+      setCopied({ message, ok: result.ok });
+    }, (error: unknown) => {
+      console.error(`[errors] copy failed: ${error instanceof Error ? error.message : String(error)}`);
+      setCopied({ message, ok: false });
+    });
+  };
+  return (
+    <div role="alert" className="row" style={{ gap: 10, alignItems: "flex-start", fontSize: 13, color: "var(--red)", marginBottom: 14 }}>
+      <span style={{ flex: 1, minWidth: 0, whiteSpace: "pre-wrap", wordBreak: "break-word", userSelect: "text" }}>{message}</span>
+      <Button size="small" onClick={copyMessage}>{copy === "copied" ? t("Copied") : copy === "failed" ? t("Copy failed") : t("Copy")}</Button>
+      {action && <Button size="small" onClick={action.onClick}>{action.label}</Button>}
+    </div>
+  );
+}
diff --git a/src/shared/desktop-api.ts b/src/shared/desktop-api.ts
index 89d318a5..78a506ef 100644
--- a/src/shared/desktop-api.ts
+++ b/src/shared/desktop-api.ts
@@ -129,6 +129,8 @@ export interface DesktopApi {
   reportUnsaved(input: { unsaved: boolean }): Promise<DesktopResult<null>>;
   /** Remembers one piece of where the operator was; null forgets it. */
   saveViewState(input: { key: string; value: unknown }): Promise<DesktopResult<null>>;
+  /** Puts text on the system clipboard. */
+  copyText(input: { text: string }): Promise<DesktopResult<null>>;
   saveOnboardingDraft(input: { draft: OnboardingDraft | null }): Promise<DesktopResult<null>>;
   completeSetup(input: { orgId: string }): Promise<DesktopResult<AppSnapshot>>;
   /** Every agent session running now, in every company: what a restart interrupts. */
diff --git a/src/shared/ipc.ts b/src/shared/ipc.ts
index 74405731..a68c41c9 100644
--- a/src/shared/ipc.ts
+++ b/src/shared/ipc.ts
@@ -3,6 +3,7 @@ export const IPC_CHANNELS = {
   relaunchApp: "agentcompany:relaunch-app",
   reportUnsaved: "agentcompany:report-unsaved",
   saveViewState: "agentcompany:save-view-state",
+  copyText: "agentcompany:copy-text",
   saveOnboardingDraft: "agentcompany:save-onboarding-draft",
   completeSetup: "agentcompany:complete-setup",
   runningSessionCount: "agentcompany:running-session-count",
diff --git a/tests/e2e/desktop.spec.ts b/tests/e2e/desktop.spec.ts
index 4391cea4..35610133 100644
--- a/tests/e2e/desktop.spec.ts
+++ b/tests/e2e/desktop.spec.ts
@@ -220,6 +220,13 @@ test("onboards, hires, and creates work in the Electron shell", async () => {
     await expect(page.getByRole("button", { name: "Refresh" })).toHaveCount(0);
     // Without a Composio key the account check fails, and the page says the statuses may be stale.
     await expect(page.getByRole("alert").filter({ hasText: "Account status could not be checked with Composio" })).toBeVisible();
+    // A connector failure is shown whole and can be copied.
+    const catalogError = page.getByRole("alert").filter({ has: page.getByRole("button", { name: "Retry" }) }).filter({ hasNotText: "Account status" }).first();
+    await expect(catalogError).toBeVisible();
+    const shownReason = (await catalogError.locator("span").first().innerText()).trim();
+    await catalogError.getByRole("button", { name: "Copy" }).click();
+    await expect(catalogError.getByRole("button", { name: "Copied" })).toBeVisible();
+    expect((await app.evaluate(({ clipboard }) => clipboard.readText())).trim()).toBe(shownReason);
 
     await page.getByRole("button", { name: "Settings" }).click();
     await expect(page.getByText("AI CEO", { exact: true })).toBeVisible();