diff --git a/plugins/_oauth/AGENTS.md b/plugins/_oauth/AGENTS.md
index e701efcc1..b933c047d 100644
--- a/plugins/_oauth/AGENTS.md
+++ b/plugins/_oauth/AGENTS.md
@@ -27,7 +27,7 @@
 - Provider cards and model slot actions must be driven by backend provider status. Do not reintroduce hardcoded frontend provider lists or fallback provider catalogs.
 - OAuth account surfaces in settings, discovery, and onboarding must use the provider registry/status summary rather than Codex-only frontend state.
 - OAuth settings pending-auth controls such as device codes, manual callback input, and provider setup fields must render inline under the relevant provider row, not as a detached section below all providers.
-- Device challenge codes use a selectable standalone box and an accessible copy button, reusing the shared clipboard helper and OAuth notifications for feedback.
+- Device challenge codes use a selectable standalone box and an accessible copy button, reusing the shared clipboard and button-feedback helpers: successful copies briefly show a green checkmark and retain OAuth notifications.
 - OAuth device-code polling must honor provider `interval`, `expires_at`, and `slow_down` updates; do not poll immediately or keep a stale fixed interval after a provider asks the client to slow down.
 - OAuth settings model slots must keep provider choice editable per slot, list only connected OAuth account providers, and persist the selected provider IDs into `chat_model.provider` and `utility_model.provider`.
 - When exactly one OAuth provider is connected, use it as an unsaved default only for empty slots or slots already using that provider. A different saved provider must keep the explicit `Choose connected provider` prompt until the user opts into the switch.
diff --git a/plugins/_oauth/README.md b/plugins/_oauth/README.md
index ce576dd61..aed9ace39 100644
--- a/plugins/_oauth/README.md
+++ b/plugins/_oauth/README.md
@@ -15,7 +15,7 @@ OAuth-backed model providers do not require users to enter API keys. Agent Zero
 ### Codex/ChatGPT (`codex_oauth`)
 
 - Uses the existing Codex device-code flow.
-- Shows the sign-in code in a selectable box with a copy button.
+- Shows the sign-in code in a selectable box with a copy button that briefly turns into a green checkmark after copying.
 - Writes Codex-compatible credentials to an Agent Zero-owned `auth.json` file.
 - Refreshes local tokens when needed.
 - If a refresh token expires or is revoked, shows an **Open OAuth settings** toast. Choose **Reconnect** on the Codex row and complete sign-in, then retry your request. No manual disconnect is needed; cancelling sign-in preserves the saved credentials and model choices.
diff --git a/plugins/_oauth/webui/config.html b/plugins/_oauth/webui/config.html
index 974e9cb24..746317cc2 100644
--- a/plugins/_oauth/webui/config.html
+++ b/plugins/_oauth/webui/config.html
@@ -166,7 +166,7 @@
                       <span>Enter this code</span>
                       <div class="oauth-device-code">
                         <code x-text="$store.oauthConfig.providerDevice(card.provider_id)?.user_code"></code>
-                        <button class="oauth-icon-button" type="button" title="Copy sign-in code" aria-label="Copy sign-in code" @click="$store.oauthConfig.copyDeviceCode(card.provider_id)">
+                        <button class="oauth-icon-button" type="button" title="Copy sign-in code" aria-label="Copy sign-in code" @click="$store.oauthConfig.copyDeviceCode(card.provider_id, $el)">
                           <x-icon name="content_copy"></x-icon>
                         </button>
                       </div>
@@ -855,6 +855,11 @@
       cursor: pointer;
     }
 
+    .oauth-icon-button.success {
+      color: #4caf50;
+      border-color: currentColor;
+    }
+
     .oauth-model-config {
       display: grid;
       gap: 12px;
diff --git a/plugins/_oauth/webui/oauth-config-store.js b/plugins/_oauth/webui/oauth-config-store.js
index bbe8a8d39..ad7237063 100644
--- a/plugins/_oauth/webui/oauth-config-store.js
+++ b/plugins/_oauth/webui/oauth-config-store.js
@@ -1,6 +1,6 @@
 import { createStore } from "/js/AlpineStore.js";
 import { callJsonApi, fetchApi } from "/js/api.js";
-import { copyToClipboard } from "/components/messages/action-buttons/simple-action-buttons.js";
+import { copyToClipboard, showButtonFeedback } from "/components/messages/action-buttons/simple-action-buttons.js";
 import { store as modelConfigStore } from "/plugins/_model_config/webui/model-config-store.js";
 import {
   store as notificationStore,
@@ -311,11 +311,12 @@ export const store = createStore("oauthConfig", {
     return this.devices[String(providerId || "")] || null;
   },
 
-  async copyDeviceCode(providerId) {
+  async copyDeviceCode(providerId, button = null) {
     const code = this.providerDevice(providerId)?.user_code;
     if (!code) return;
     try {
       await copyToClipboard(code);
+      if (button) showButtonFeedback(button, true, "content_copy");
       void toastFrontendSuccess("Sign-in code copied.", "OAuth Connections");
     } catch {
       void toastFrontendError("Could not copy the code. Select it and copy manually.", "OAuth Connections");
diff --git a/tests/test_oauth_reconnect.mjs b/tests/test_oauth_reconnect.mjs
index e53823e1f..6fd3fa5fa 100644
--- a/tests/test_oauth_reconnect.mjs
+++ b/tests/test_oauth_reconnect.mjs
@@ -6,6 +6,8 @@ const requests = [];
 const timers = new Map();
 const dismissed = [];
 const copied = [];
+const buttonFeedback = [];
+const copyButton = {};
 const feedback = [];
 let clipboardDenied = false;
 const source = readFileSync(new URL('../plugins/_oauth/webui/oauth-config-store.js', import.meta.url), 'utf8')
@@ -29,6 +31,7 @@ const store = vm.runInNewContext(`${source}\nstore`, {
     if (clipboardDenied) throw new Error('Permission denied');
     copied.push(code);
   },
+  showButtonFeedback: (...args) => buttonFeedback.push(args),
   notificationStore: { dismissToast: id => dismissed.push(id) },
 });
 const provider = 'codex_oauth';
@@ -41,20 +44,23 @@ await store.connectProvider(provider);
 assert.equal(store.providerPrimaryLabel(provider), 'Waiting');
 assert.equal(store.providerDetailOpen(provider), true);
 assert.equal(store.providerDevice(provider).user_code, 'TEST');
-await store.copyDeviceCode(provider);
+await store.copyDeviceCode(provider, copyButton);
 assert.deepEqual(copied, ['TEST']);
+assert.deepEqual(buttonFeedback, [[copyButton, true, 'content_copy']]);
 assert.equal(feedback.pop(), 'Sign-in code copied.');
 clipboardDenied = true;
-await store.copyDeviceCode(provider);
+await store.copyDeviceCode(provider, copyButton);
 assert.equal(feedback.pop(), 'Could not copy the code. Select it and copy manually.');
+assert.equal(buttonFeedback.length, 1);
 assert.equal(timers.size, 1);
 await store.connectProvider(provider);
 assert.equal(requests.length, 1);
 store.cancelConnect(provider);
 assert.equal(timers.size, 0);
 assert.equal(store.providerDevice(provider), null);
-await store.copyDeviceCode(provider);
+await store.copyDeviceCode(provider, copyButton);
 assert.equal(copied.length, 1);
+assert.equal(buttonFeedback.length, 1);
 assert.equal(feedback.length, 0);
 assert.equal(store.providerConnected(provider), true);
 assert.equal(store.modelConfig.chat_model.name, 'chosen-model');