diff --git a/src/vs/workbench/contrib/chat/browser/media/chat.css b/src/vs/workbench/contrib/chat/browser/media/chat.css
index 97c1103e53d410..f075098745aa7b 100644
--- a/src/vs/workbench/contrib/chat/browser/media/chat.css
+++ b/src/vs/workbench/contrib/chat/browser/media/chat.css
@@ -271,6 +271,10 @@
 	line-height: 1.3rem;
 }
 
+.interactive-item-container .value .rendered-markdown img {
+	max-width: 100%;
+}
+
 .interactive-item-container .monaco-tokenized-source,
 .interactive-item-container code {
 	font-family: var(--monaco-monospace-font);
diff --git a/src/vs/workbench/contrib/chat/common/chatAgents.ts b/src/vs/workbench/contrib/chat/common/chatAgents.ts
index 3fc918226a5118..cd5e234a25ca14 100644
--- a/src/vs/workbench/contrib/chat/common/chatAgents.ts
+++ b/src/vs/workbench/contrib/chat/common/chatAgents.ts
@@ -503,5 +503,9 @@ export function reviveSerializedAgent(raw: ISerializableChatAgentData): IChatAge
 		agent.extensionDisplayName = '';
 	}
 
+	if (!('extensionId' in agent)) {
+		agent.extensionId = new ExtensionIdentifier('');
+	}
+
 	return revive(agent);
 }
diff --git a/src/vscode-dts/vscode.d.ts b/src/vscode-dts/vscode.d.ts
index e33496f4bfe9d8..775767e7f192a3 100644
--- a/src/vscode-dts/vscode.d.ts
+++ b/src/vscode-dts/vscode.d.ts
@@ -18690,6 +18690,7 @@ declare module 'vscode' {
 		/**
 		 * Push a markdown part to this stream. Short-hand for
 		 * `push(new ChatResponseMarkdownPart(value))`.
+		 * Note: Only the first 100,000 characters will be rendered.
 		 *
 		 * @see {@link ChatResponseStream.push}
 		 * @param value A markdown string or a string that should be interpreted as markdown. The boolean form of {@link MarkdownString.isTrusted} is NOT supported.
@@ -18770,6 +18771,7 @@ declare module 'vscode' {
 
 		/**
 		 * Create a new ChatResponseMarkdownPart.
+		 * Note: Only the first 100,000 characters will be rendered.
 		 *
 		 * @param value A markdown string or a string that should be interpreted as markdown. The boolean form of {@link MarkdownString.isTrusted} is NOT supported.
 		 */