feat(vscode): auto-detect and register vscode-mcp-server

sdks/vscode/package.json

@@ -23,6 +23,16 @@
   "activationEvents": [],
   "main": "./dist/extension.js",
   "contributes": {
+    "configuration": {
+      "title": "OpenCode",
+      "properties": {
+        "opencode.autoDetectMcpServer": {
+          "type": "boolean",
+          "default": true,
+          "description": "Automatically detect and enable vscode-mcp-server if installed"
+        }
+      }
+    },
     "commands": [
       {
         "command": "opencode.openTerminal",

sdks/vscode/src/extension.ts

@@ -5,6 +5,30 @@ import * as vscode from "vscode"
 
 const TERMINAL_NAME = "opencode"
 
+/**
+ * Checks if vscode-mcp-server extension is installed and gets its configured port
+ * @returns Configuration object with port, or null if not installed/configured
+ */
+function getVscodeMcpServerConfig(): { installed: boolean; port: number } | null {
+  const ext = vscode.extensions.getExtension("JuehangQin.vscode-mcp-server")
+  if (!ext) {
+    return null
+  }
+
+  // Read the port from vscode-mcp-server's actual configuration
+  const config = vscode.workspace.getConfiguration("vscode-mcp-server")
+  const port = config.get<number>("port")
+
+  if (port === undefined) {
+    return null
+  }
+
+  return {
+    installed: true,
+    port: port,
+  }
+}
+
 export function activate(context: vscode.ExtensionContext) {
   let openNewTerminalDisposable = vscode.commands.registerCommand("opencode.openNewTerminal", async () => {
     await openTerminal()
@@ -64,11 +88,6 @@ export function activate(context: vscode.ExtensionContext) {
     terminal.show()
     terminal.sendText(`opencode --port ${port}`)
 
-    const fileRef = getActiveFile()
-    if (!fileRef) {
-      return
-    }
-
     // Wait for the terminal to be ready
     let tries = 10
     let connected = false
@@ -83,9 +102,40 @@ export function activate(context: vscode.ExtensionContext) {
       tries--
     } while (tries > 0)
 
-    // If connected, append the prompt to the terminal
+    // If connected, try to register vscode-mcp-server if available
     if (connected) {
-      await appendPrompt(port, `In ${fileRef}`)
+      const opencodeConfig = vscode.workspace.getConfiguration("opencode")
+      const autoDetect = opencodeConfig.get<boolean>("autoDetectMcpServer") ?? true
+
+      if (autoDetect) {
+        const mcpServerConfig = getVscodeMcpServerConfig()
+
+        if (mcpServerConfig?.installed) {
+          try {
+            // Register the MCP server with opencode directly
+            // opencode will handle the connection to the MCP server
+            await fetch(`http://localhost:${port}/mcp`, {
+              method: "POST",
+              headers: { "Content-Type": "application/json" },
+              body: JSON.stringify({
+                name: "vscode",
+                config: {
+                  type: "remote",
+                  url: `http://localhost:${mcpServerConfig.port}/mcp`,
+                },
+              }),
+            })
+          } catch (e) {
+            // MCP server registration failed silently
+          }
+        }
+      }
+
+      // Append the file reference to the prompt if there's an active file
+      const fileRef = getActiveFile()
+      if (fileRef) {
+        await appendPrompt(port, `In ${fileRef}`)
+      }
       terminal.show()
     }
   }