How can we use the Build Adapters API alpha feature to solve custom bundling conflicts in Next.js 16 CI/CD pipelines?

The Build Adapters API (alpha) in Next.js 16 lets you create custom build adapters that hook into the build process. This solves bundling conflicts in CI/CD pipelines by giving full control over build configuration, output modification, and deployment integration for unique environments.

To fix custom bundling conflicts in Next.js 16 CI/CD pipelines, use the Build Adapters API to write your own adapter. You add a JavaScript adapter module that hooks into Next.js’ build lifecycle, allowing you to modify webpack/Turbopack configs, rewrite outputs, or integrate special deployment steps programmatically. This replaces fragile shell scripts with clean code and works seamlessly with unique CI/CD nuances and platform requirements. Enable it by specifying your adapter path under the experimental.adapterPath config, and the next build will run your adapter hooks automatically during compilation.

Code

// next.config.js
const nextConfig = {
  experimental: {
    adapterPath: require.resolve('./my-custom-adapter.js'), // your custom adapter
  },
};

module.exports = nextConfig;


// my-custom-adapter.js
module.exports = {
  async build({ buildOpts, nextConfig }) {
    // Customize build configuration, e.g. tweak Turbopack or webpack
    buildOpts.config.modifyConfig((config) => {
      // Example: add alias or plugin to resolve conflicts
      config.resolve.alias['my-lib'] = '/custom/path/to/my-lib';
      return config;
    });

    // Optionally manipulate output or run deployment steps here

    // Continue with the normal build
    await buildOpts.originalBuild();
  },
};