From 8ae64d50c8d66dadf3f93a86102991cec1f4d3f0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Krzysztof=20=C5=BBmijewski?=
 <6475163+viperx1@users.noreply.github.com>
Date: Fri, 21 Aug 2026 23:08:10 +0200
Subject: [PATCH] fix(mcp): disable bun fetch idle timeout for remote
 transports

---
 packages/opencode/src/mcp/index.ts | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/packages/opencode/src/mcp/index.ts b/packages/opencode/src/mcp/index.ts
index 05f12fa2ee45..0ecd2494fb7c 100644
--- a/packages/opencode/src/mcp/index.ts
+++ b/packages/opencode/src/mcp/index.ts
@@ -271,6 +271,13 @@ const layer = Layer.effect(
           name: "StreamableHTTP",
           transport: new StreamableHTTPClientTransport(url, {
             authProvider,
+            fetch: (input, init) =>
+              fetch(input, {
+                ...init,
+                // disable bun's fetch idle timeout so the MCP timeout is the ceiling
+                // @ts-ignore see here: https://github.com/oven-sh/bun/issues/16682
+                timeout: false,
+              }),
             requestInit: mcp.headers ? { headers: mcp.headers } : undefined,
           }),
         },
@@ -278,6 +285,13 @@ const layer = Layer.effect(
           name: "SSE",
           transport: new SSEClientTransport(url, {
             authProvider,
+            fetch: (input, init) =>
+              fetch(input, {
+                ...init,
+                // disable bun's fetch idle timeout so the MCP timeout is the ceiling
+                // @ts-ignore see here: https://github.com/oven-sh/bun/issues/16682
+                timeout: false,
+              }),
             requestInit: mcp.headers ? { headers: mcp.headers } : undefined,
           }),
         },