Release notes

Author: joyceerhl

release-notes/v1_100.md

@@ -116,6 +116,14 @@ Use `#extensions` tool to find extensions from the Marketplace. This tool is ava
 
 <video src="images/1_100/extensions-agent-tool.mp4" title="Video that shows using the extensions tool to display popular Java extensions." autoplay loop controls muted></video>
 
+### Faster agent mode edits with GPT 4.1
+
+We've implemented support for OpenAI's apply patch editing format when using GPT 4.1 and o4-mini in agent mode. This means significantly faster edits, especially in large files. The tool is enabled by default in VS Code Insiders and will be progressively rolled out in VS Code Stable.
+
+### Autofix diagnostics from agent mode edits
+
+If a file edit in agent mode introduces new errors, agent mode can now detect them and automatically propose a followup edit. You can disable this behavior with `setting(github.copilot.chat.agent.autoFix)`.
+
 ## Accessibility
 
 ### Merge editor improvements