pnpm add @variant/mcp-server

import {
  createAndStartMcpServer,
  definePluginTools,
  readPluginMcpServerConfig,
} from '@variant/mcp-server';
import { registerWhoami } from '../tools/whoami/whoami.js';

const registerTools = definePluginTools([registerWhoami]);
const config = readPluginMcpServerConfig();

await createAndStartMcpServer(config, registerTools);

import { getRequestContext, log, type McpServer } from '@variant/mcp-server';
import { z } from 'zod';

export function registerMyTool(server: McpServer): void {
  server.registerTool(
    'my-tool',
    {
      title: 'My Tool',
      description: 'Does something useful',
      inputSchema: { param: z.string() },
    },
    async ({ param }) => {
      const context = getRequestContext();
      log('info', 'my-tool called', { userId: context?.userId });
      return { content: [{ type: 'text', text: param }] };
    },
  );
}

import { defineWidgetViteConfig } from '@variant/mcp-server/vite';

export default defineWidgetViteConfig();

pnpm exec variant-build-widgets
pnpm exec variant-build-widgets -- --watch --mode development

import { mountWidget } from '@variant/mcp-server/widget';

import { registerWidgetTool } from '@variant/mcp-server';

pnpm install
pnpm typecheck   # tsc --noEmit
pnpm lint        # biome check .
pnpm format      # biome format --write .
pnpm test        # vitest run
pnpm build       # tsc
pnpm check-exports  # validate published types/exports resolve for ESM consumers
pnpm verify      # run all of the above

pnpm install
pnpm build
pnpm publish --access public