diff --git a/extensions/positron-zed/src/positronZedLanguageRuntime.ts b/extensions/positron-zed/src/positronZedLanguageRuntime.ts
index 209bac4107f..a954586c0c4 100644
--- a/extensions/positron-zed/src/positronZedLanguageRuntime.ts
+++ b/extensions/positron-zed/src/positronZedLanguageRuntime.ts
@@ -1743,7 +1743,7 @@ export class PositronZedRuntimeSession implements positron.LanguageRuntimeSessio
 				type: positron.LanguageRuntimeMessageType.CommClosed,
 				comm_id: target.id,
 				target_name: 'positron.connection',
-				data: { name: target.name }
+				data: { name: target.name },
 			} as positron.LanguageRuntimeCommClosed);
 
 			// Emit text output so something shows up in the console.
@@ -1886,7 +1886,7 @@ export class PositronZedRuntimeSession implements positron.LanguageRuntimeSessio
 			type: positron.LanguageRuntimeMessageType.Input,
 			state: positron.RuntimeOnlineState.Busy,
 			code: code,
-			execution_count: 1
+			execution_count: 1,
 		} as positron.LanguageRuntimeInput);
 
 		// If the preview is open, add it to the preview's recent commands.
diff --git a/src/positron-dts/positron.d.ts b/src/positron-dts/positron.d.ts
index 1bdad193f6c..6a969a2c8e5 100644
--- a/src/positron-dts/positron.d.ts
+++ b/src/positron-dts/positron.d.ts
@@ -201,7 +201,7 @@ declare module 'positron' {
 		type: LanguageRuntimeMessageType;
 
 		/** Additional metadata, if any */
-		metadata: Record<string, any>;
+		metadata?: Record<string, any>;
 	}
 
 	/** LanguageRuntimeOutput is a LanguageRuntimeMessage representing output (text, plots, etc.) */
diff --git a/src/vs/workbench/services/languageRuntime/common/languageRuntimeService.ts b/src/vs/workbench/services/languageRuntime/common/languageRuntimeService.ts
index 735d7d04953..6ae4a96a694 100644
--- a/src/vs/workbench/services/languageRuntime/common/languageRuntimeService.ts
+++ b/src/vs/workbench/services/languageRuntime/common/languageRuntimeService.ts
@@ -58,7 +58,7 @@ export interface ILanguageRuntimeMessage {
 	when: string;
 
 	/** Additional metadata, if any */
-	metadata: Record<string, any>;
+	metadata?: Record<string, any>;
 }
 
 /**