update release notes, added video

Author: justschen

release-notes/images/1_100/generate-alt-text.png

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:9a22a255d813fafea4b88812fd13300a0fc843f1c6d9bf7bb6aa2588c6036721
+size 97919614

release-notes/images/1_100/ui-element-selection-demo.mp4

@@ -69,6 +69,21 @@ Use the `#githubRepo` tool with `microsoft/typescript` to answer questions about
 
 Keep in mind that if you want to ask about the repo you are currently working on, you can just use the [`#codebase` tool](../docs/copilot/reference/workspace-context.md#making-copilot-chat-an-expert-in-your-workspace). Also this tool is only for searching for relevant code snippets. The [GitHub MCP server](https://github.com/github/github-mcp-server?tab=readme-ov-file#github-mcp-server) provides tools for working with GitHub issues and pull requests.
 
+### Select and Attach UI Elements to Chat (Experimental)
+
+After opening any locally-hosted site via the built-in Simple Browser (you can access the Simple Browser via the `Simple Browser: Show` command in the Command Palette), a new toolbar will be shown where you can click "Start" to select any element in the site that you want. This will attach a screenshot of the selected element, as well as the HTML and CSS of the element.
+
+Configure what is attached to chat with `setting(chat.sendElementsToChat.attachCSS)` which enables/disables matched CSS from the attachment or `setting(chat.sendElementsToChat.attachImages)` which enables/disables attaching the screenshot of the selected element. This experimental feature will be enabled by default for all Simple Browsers, but can be disabled with `setting(chat.sendElementsToChat.enabled)`.
+
+<video src="images/1_100/ui-element-selection-demo.mp4" title="A video showing the full flow of the UI element selection experimental feature. In the demo, we attach a hero from a webpage and ask chat to add a background image to that hero." autoplay loop controls muted></video>
+
+
+### Generate or Refine Alt Text in HTML or Markdown
+
+You can now generate or refine existing alt text in HTML and Markdown files. Navigate to any line containing an embeded image and trigger quick fix via `kb(editor.action.quickFix)` or by clicking on the lightbulb widget.
+
+![Generating alt text for an image html element](images/1_100/generate-alt-text.png)
+
 ## Accessibility
 
 ### Merge editor improvements
@@ -273,6 +288,11 @@ Specifically, this new API allows you to:
 
 ## Proposed APIs
 
+### Tool Calling for Images
+
+Last iteration, we added a [proposed API](https://github.com/microsoft/vscode/blob/main/src/vscode-dts/vscode.proposed.languageModelDataPart.d.ts) so that extensions can attach images and send vision requests to the language model. This iteration, we've expanded on this API to allow tool call results to include images as well.
+
+Check out [this API proposal issue](https://github.com/microsoft/vscode/issues/245104) to see a usage example and to stay up to date with the status of this API.
 
 ## Engineering