Apply PR #11590: fix: strip reasoning parts from messages when switching to non-thinking models (#11571)

README.zht.md

@@ -124,7 +124,7 @@ OpenCode 內建了兩種 Agent，您可以使用 `Tab` 鍵快速切換。
 - 100% 開源。
 - 不綁定特定的服務提供商。雖然我們推薦使用透過 [OpenCode Zen](https://opencode.ai/zen) 提供的模型，但 OpenCode 也可搭配 Claude, OpenAI, Google 甚至本地模型使用。隨著模型不斷演進，彼此間的差距會縮小且價格會下降，因此具備「不限廠商 (provider-agnostic)」的特性至關重要。
 - 內建 LSP (語言伺服器協定) 支援。
-- 專注於終端機介面 (TUI)。OpenCode 由 Neovim 愛好者與 [terminal.shop](https://terminal.shop) 的創作者打造；我們將不斷挑戰終端機介面的極限。
+- 專注於終端機介面 (TUI)。OpenCode 由 Neovim 愛好者與 [terminal.shop](https://terminal.shop) 的創作者打造。我們將不斷挑戰終端機介面的極限。
 - 客戶端/伺服器架構 (Client/Server Architecture)。這讓 OpenCode 能夠在您的電腦上運行的同時，由行動裝置進行遠端操控。這意味著 TUI 前端只是眾多可能的客戶端之一。
 
 ---

packages/opencode/src/provider/transform.ts

@@ -129,40 +129,39 @@ export namespace ProviderTransform {
       return result
     }
 
-    if (typeof model.capabilities.interleaved === "object" && model.capabilities.interleaved.field) {
-      const field = model.capabilities.interleaved.field
-      return msgs.map((msg) => {
-        if (msg.role === "assistant" && Array.isArray(msg.content)) {
-          const reasoningParts = msg.content.filter((part: any) => part.type === "reasoning")
-          const reasoningText = reasoningParts.map((part: any) => part.text).join("")
+    const supportsInterleaved = typeof model.capabilities.interleaved === "object" && model.capabilities.interleaved.field
+    const field = supportsInterleaved ? model.capabilities.interleaved.field : undefined
 
-          // Filter out reasoning parts from content
-          const filteredContent = msg.content.filter((part: any) => part.type !== "reasoning")
-
-          // Include reasoning_content | reasoning_details directly on the message for all assistant messages
-          if (reasoningText) {
-            return {
-              ...msg,
-              content: filteredContent,
-              providerOptions: {
-                ...msg.providerOptions,
-                openaiCompatible: {
-                  ...(msg.providerOptions as any)?.openaiCompatible,
-                  [field]: reasoningText,
-                },
-              },
-            }
-          }
+    return msgs.map((msg) => {
+      if (msg.role === "assistant" && Array.isArray(msg.content)) {
+        const reasoningParts = msg.content.filter((part: any) => part.type === "reasoning")
+        const reasoningText = reasoningParts.map((part: any) => part.text).join("")
+        // Filter out reasoning parts from content
+        const filteredContent = msg.content.filter((part: any) => part.type !== "reasoning")
 
+        // Include reasoning_content | reasoning_details directly on message for models that support interleaved reasoning
+        if (reasoningText && supportsInterleaved && field) {
           return {
             ...msg,
             content: filteredContent,
+            providerOptions: {
+              ...msg.providerOptions,
+              openaiCompatible: {
+                ...(msg.providerOptions as any)?.openaiCompatible,
+                [field]: reasoningText,
+              },
+            },
           }
         }
 
-        return msg
-      })
-    }
+        return {
+          ...msg,
+          content: filteredContent,
+        }
+      }
+
+      return msg
+    })
 
     return msgs
   }