feat(mcp): upgrade client SDK to v2 (#39247)

Co-authored-by: Matt Carey <mcarey@cloudflare.com>

packages/opencode/test/mcp/catalog.test.ts

@@ -1,8 +1,6 @@
 import { describe, expect, test } from "bun:test"
-import { Client } from "@modelcontextprotocol/sdk/client/index.js"
-import { InMemoryTransport } from "@modelcontextprotocol/sdk/inMemory.js"
-import { Server } from "@modelcontextprotocol/sdk/server/index.js"
-import { CallToolRequestSchema, ListToolsRequestSchema } from "@modelcontextprotocol/sdk/types.js"
+import { Client, InMemoryTransport } from "@modelcontextprotocol/client"
+import { Server } from "@modelcontextprotocol/server"
 import { McpCatalog } from "@/mcp/catalog"
 import { Effect } from "effect"
 
@@ -52,16 +50,16 @@ describe("McpCatalog.convertTool", () => {
 
 test("preserves output schema validation across paginated tool discovery", async () => {
   const server = new Server({ name: "pagination", version: "1.0.0" }, { capabilities: { tools: {} } })
-  server.setRequestHandler(ListToolsRequestSchema, ({ params }) =>
+  server.setRequestHandler("tools/list", ({ params }) =>
     Promise.resolve(
       params?.cursor === "page-2"
         ? {
             tools: [
               {
                 name: "second",
-                inputSchema: { type: "object" },
+                inputSchema: { type: "object" as const },
                 outputSchema: {
-                  type: "object",
+                  type: "object" as const,
                   properties: { value: { type: "number" } },
                   required: ["value"],
                 },
@@ -72,9 +70,9 @@ test("preserves output schema validation across paginated tool discovery", async
             tools: [
               {
                 name: "first",
-                inputSchema: { type: "object" },
+                inputSchema: { type: "object" as const },
                 outputSchema: {
-                  type: "object",
+                  type: "object" as const,
                   properties: { value: { type: "string" } },
                   required: ["value"],
                 },
@@ -84,7 +82,7 @@ test("preserves output schema validation across paginated tool discovery", async
           },
     ),
   )
-  server.setRequestHandler(CallToolRequestSchema, ({ params }) =>
+  server.setRequestHandler("tools/call", ({ params }) =>
     Promise.resolve({
       content: [],
       structuredContent: { value: params.name === "first" ? 42 : 1 },
@@ -98,9 +96,7 @@ test("preserves output schema validation across paginated tool discovery", async
   try {
     const tools = await Effect.runPromise(McpCatalog.defs(client))
     expect(tools?.map((tool) => tool.name)).toEqual(["first", "second"])
-    await expect(client.callTool({ name: "first", arguments: {} })).rejects.toThrow(
-      "Structured content does not match the tool's output schema",
-    )
+    await expect(client.callTool({ name: "first", arguments: {} })).rejects.toThrow(/output schema/i)
   } finally {
     await Promise.all([client.close(), server.close()])
   }