From 4819da179745f775e4498dfbcd8ad47ba4c38121 Mon Sep 17 00:00:00 2001
From: Anton Pidkuiko MacBook <antonp@anthropic.com>
Date: Fri, 5 Dec 2025 15:10:22 +0000
Subject: [PATCH] fix: remove 'system' from theme type
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Remove 'system' option from theme, leaving only 'light' | 'dark'.

This aligns the SDK with:
- The spec (which already only has light/dark)
- OpenAI Apps SDK compatibility

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>
---
 src/types.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/types.ts b/src/types.ts
index 05a936d88..2023dd257 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -425,7 +425,7 @@ export interface McpUiHostContext {
    * Current color theme preference.
    * @example "dark"
    */
-  theme?: "light" | "dark" | "system";
+  theme?: "light" | "dark";
   /**
    * How the UI is currently displayed.
    * @example "inline"