chore: Update CHANGELOG.md and feed.xml

CHANGELOG.md

@@ -1,5 +1,9 @@
 # Changelog
 
+## 2.1.231
+
+- Fixed MCP OAuth sign-in failing with a redirect URI mismatch for servers that use a pre-registered OAuth client, such as Slack
+
 ## 2.1.229
 
 - Documented `claude remote-control --continue` for resuming the most recent Remote Control session

feed.xml

@@ -6,7 +6,14 @@
   <author><name>Anthropic</name></author>
   <link rel="alternate" type="text/html" href="https://github.com/anthropics/claude-code/blob/main/CHANGELOG.md"/>
   <link rel="self" type="application/atom+xml" href="https://raw.githubusercontent.com/anthropics/claude-code/main/feed.xml"/>
-  <updated>2026-08-12T20:56:14Z</updated>
+  <updated>2026-08-13T08:38:44Z</updated>
+  <entry>
+    <id>https://github.com/anthropics/claude-code/releases/tag/v2.1.231</id>
+    <title>Claude Code v2.1.231</title>
+    <link rel="alternate" type="text/html" href="https://github.com/anthropics/claude-code/releases/tag/v2.1.231"/>
+    <updated>2026-08-13T08:38:44Z</updated>
+    <content type="html">&lt;p&gt;• Fixed MCP OAuth sign-in failing with a redirect URI mismatch for servers that use a pre-registered OAuth client, such as Slack&lt;/p&gt;</content>
+  </entry>
   <entry>
     <id>https://github.com/anthropics/claude-code/releases/tag/v2.1.229</id>
     <title>Claude Code v2.1.229</title>
@@ -588,11 +595,4 @@
 &lt;p&gt;• Agent view: the session you pressed ← from stays visibly marked even after mouse hover or arrow keys move the selection&lt;/p&gt;
 &lt;p&gt;• Fable temporarily shows as unavailable in the advisor picker while a server-side issue causing Fable advisor failures is fixed&lt;/p&gt;</content>
   </entry>
-  <entry>
-    <id>https://github.com/anthropics/claude-code/releases/tag/v2.1.209</id>
-    <title>Claude Code v2.1.209</title>
-    <link rel="alternate" type="text/html" href="https://github.com/anthropics/claude-code/releases/tag/v2.1.209"/>
-    <updated>2026-07-14T06:36:21Z</updated>
-    <content type="html">&lt;p&gt;• Fixed /model and other dialogs being blocked in claude agents background sessions (reverts an overly broad guard)&lt;/p&gt;</content>
-  </entry>
 </feed>