feat: support disabling bundled mcp servers

scripts/lib/mcp-config.js

@@ -0,0 +1,56 @@
+'use strict';
+
+function parseDisabledMcpServers(value) {
+  return [...new Set(
+    String(value || '')
+      .split(',')
+      .map((entry) => entry.trim())
+      .filter(Boolean)
+  )];
+}
+
+function filterMcpConfig(config, disabledServerNames = []) {
+  if (!config || typeof config !== 'object' || Array.isArray(config)) {
+    throw new Error('MCP config must be a JSON object');
+  }
+
+  const servers = config.mcpServers;
+  if (!servers || typeof servers !== 'object' || Array.isArray(servers)) {
+    throw new Error('MCP config must include an mcpServers object');
+  }
+
+  const disabled = new Set(parseDisabledMcpServers(disabledServerNames));
+  if (disabled.size === 0) {
+    return {
+      config: {
+        ...config,
+        mcpServers: { ...servers },
+      },
+      removed: [],
+    };
+  }
+
+  const nextServers = {};
+  const removed = [];
+
+  for (const [name, serverConfig] of Object.entries(servers)) {
+    if (disabled.has(name)) {
+      removed.push(name);
+      continue;
+    }
+    nextServers[name] = serverConfig;
+  }
+
+  return {
+    config: {
+      ...config,
+      mcpServers: nextServers,
+    },
+    removed,
+  };
+}
+
+module.exports = {
+  filterMcpConfig,
+  parseDisabledMcpServers,
+};