From 231f4944c76c67324affeed385d66a1840e83785 Mon Sep 17 00:00:00 2001
From: Aiden Cline <63023139+rekram1-node@users.noreply.github.com>
Date: Sat, 13 Jun 2026 23:54:45 -0500
Subject: [PATCH] fix(mcp): use SDK protocol version in debug (#32243)

---
 packages/opencode/src/cli/cmd/mcp.ts | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/packages/opencode/src/cli/cmd/mcp.ts b/packages/opencode/src/cli/cmd/mcp.ts
index 8fa6459ce2..06cb77bce1 100644
--- a/packages/opencode/src/cli/cmd/mcp.ts
+++ b/packages/opencode/src/cli/cmd/mcp.ts
@@ -5,6 +5,7 @@ import { Cause } from "effect"
 import { Client } from "@modelcontextprotocol/sdk/client/index.js"
 import { StreamableHTTPClientTransport } from "@modelcontextprotocol/sdk/client/streamableHttp.js"
 import { UnauthorizedError } from "@modelcontextprotocol/sdk/client/auth.js"
+import { LATEST_PROTOCOL_VERSION } from "@modelcontextprotocol/sdk/types.js"
 import * as prompts from "@clack/prompts"
 import { UI } from "../ui"
 import { MCP } from "../../mcp"
@@ -752,7 +753,7 @@ export const McpDebugCommand = effectCmd({
             jsonrpc: "2.0",
             method: "initialize",
             params: {
-              protocolVersion: "2024-11-05",
+              protocolVersion: LATEST_PROTOCOL_VERSION,
               capabilities: {},
               clientInfo: { name: "opencode-debug", version: InstallationVersion },
             },