fix(opencode): preserve compatible stream errors

package.json

@@ -158,6 +158,7 @@
     "@pierre/trees@1.0.0-beta.4": "patches/@pierre%2Ftrees@1.0.0-beta.4.patch",
     "@modelcontextprotocol/sdk@1.29.0": "patches/@modelcontextprotocol%2Fsdk@1.29.0.patch",
     "effect@4.0.0-beta.83": "patches/effect@4.0.0-beta.83.patch",
-    "@tanstack/virtual-core@3.17.3": "patches/@tanstack%2Fvirtual-core@3.17.3.patch"
+    "@tanstack/virtual-core@3.17.3": "patches/@tanstack%2Fvirtual-core@3.17.3.patch",
+    "@ai-sdk/openai-compatible@2.0.41": "patches/@ai-sdk%2Fopenai-compatible@2.0.41.patch"
   }
 }

packages/opencode/test/session/processor-effect.test.ts

@@ -604,6 +604,55 @@ it.live("session.processor effect tests retry recognized structured json errors"
   ),
 )
 
+it.live("session.processor effect tests retry OpenAI-compatible midstream server errors", () =>
+  provideTmpdirServer(
+    ({ dir, llm }) =>
+      Effect.gen(function* () {
+        const { processors, session, provider } = yield* boot()
+
+        yield* llm.push(
+          raw({ chunks: [{ error: { type: "server_error", code: "server_error", message: "xxx" } }] }),
+        )
+        yield* llm.text("after")
+
+        const chat = yield* session.create({})
+        const parent = yield* user(chat.id, "retry midstream server error")
+        const msg = yield* assistant(chat.id, parent.id, path.resolve(dir))
+        const mdl = yield* provider.getModel(ref.providerID, ref.modelID)
+        const handle = yield* processors.create({
+          assistantMessage: msg,
+          sessionID: chat.id,
+          model: mdl,
+        })
+
+        const value = yield* handle.process({
+          user: {
+            id: parent.id,
+            sessionID: chat.id,
+            role: "user",
+            time: parent.time,
+            agent: parent.agent,
+            model: { providerID: ref.providerID, modelID: ref.modelID },
+          } satisfies SessionV1.User,
+          sessionID: chat.id,
+          model: mdl,
+          agent: agent(),
+          system: [],
+          messages: [{ role: "user", content: "retry midstream server error" }],
+          tools: {},
+        })
+
+        const parts = yield* MessageV2.parts(msg.id)
+
+        expect(value).toBe("continue")
+        expect(yield* llm.calls).toBe(2)
+        expect(parts.some((part) => part.type === "text" && part.text === "after")).toBe(true)
+        expect(handle.message.error).toBeUndefined()
+      }),
+    { config: (url) => providerCfg(url) },
+  ),
+)
+
 it.live("session.processor effect tests publish retry status updates", () =>
   provideTmpdirServer(
     ({ dir, llm }) =>

patches/@ai-sdk%2Fopenai-compatible@2.0.41.patch

@@ -0,0 +1,39 @@
+diff --git a/dist/index.js b/dist/index.js
+index dca128d3a790378c51a24a16d92585178343b278..da75f9d64acd2b607abd15079ce2d03b7a8d675a 100644
+--- a/dist/index.js
++++ b/dist/index.js
+@@ -696,7 +696,7 @@ var OpenAICompatibleChatLanguageModel = class {
+               finishReason = { unified: "error", raw: void 0 };
+               controller.enqueue({
+                 type: "error",
+-                error: chunk.value.error.message
++                error: chunk.value.error
+               });
+               return;
+             }
+diff --git a/dist/index.mjs b/dist/index.mjs
+index 3b1e1b6bdec5032e3b4fa5ffbcc8cdf3dfe1cc40..eaffc446f80552ea0b26573b89daa4dfc7776e6e 100644
+--- a/dist/index.mjs
++++ b/dist/index.mjs
+@@ -683,7 +683,7 @@ var OpenAICompatibleChatLanguageModel = class {
+               finishReason = { unified: "error", raw: void 0 };
+               controller.enqueue({
+                 type: "error",
+-                error: chunk.value.error.message
++                error: chunk.value.error
+               });
+               return;
+             }
+diff --git a/src/chat/openai-compatible-chat-language-model.ts b/src/chat/openai-compatible-chat-language-model.ts
+index 8c622db23c2d9a7373701f5a1b0c2ba109e24602..643c3db68a6043e097edc1122e0eb53fd13495c5 100644
+--- a/src/chat/openai-compatible-chat-language-model.ts
++++ b/src/chat/openai-compatible-chat-language-model.ts
+@@ -442,7 +442,7 @@ export class OpenAICompatibleChatLanguageModel implements LanguageModelV3 {
+               finishReason = { unified: 'error', raw: undefined };
+               controller.enqueue({
+                 type: 'error',
+-                error: chunk.value.error.message,
++                error: chunk.value.error,
+               });
+               return;
+             }