bun-build

Create optimized production bundles with Bun.build for browser, node, or bun targets.

6|Updated Mar 26, 2026
One-click install
npx skills add https://github.com/memoirlabs/mog --skill bun-build-memoirlabs
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: bun-build
Source: https://github.com/memoirlabs/mog/tree/main/.agents/skills/bun-build
Command: npx skills add https://github.com/memoirlabs/mog --skill bun-build-memoirlabs

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

Bun production bundles can be slow to set up and hard to optimize, leading to oversized builds, inconsistent environments, and painful deployment cycles. This Skill helps you produce efficient, production-ready outputs with correct targets, formats, and optimizations.

Core Features & Use Cases

  • Create optimized bundles with Bun.build: Configure entrypoints, output directories, target platform, and module format for browser, node, or bun runtime.
  • Apply production optimizations: Enable minification, splitting, naming with hashing for caching, and external source maps for debugging.
  • Use environment-specific builds: Generate separate configurations (development vs production) using build-time defines like NODE_ENV and API URLs.
  • Use supporting build references: Leverage included reference docs for targets, plugins, and optimization patterns to adjust your setup as your project grows.

Use case example: you are deploying a frontend app and need smaller, cache-friendly bundles plus hashed filenames and external source maps for production debugging.

Quick Start

Ask an AI: "Create a production build setup for my TypeScript app using Bun's native bundler, targeting the browser with ESM output, minification, code splitting, hashed filenames, and external sourcemaps, and update my package.json with build scripts."

Frequently Asked Questions about bun-build

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I create a production build with Bun's native bundler?

Create a production build with Bun by configuring Bun.build with explicit entrypoints, outdir, target platform, and module format. You can enable minification, code splitting, hashed filenames, and external sourcemaps to generate optimized outputs for browser, node, or bun runtimes.

Can I generate environment-specific bundles for development and production using Bun?

Yes, you can generate environment-specific bundles using Bun by applying build-time defines like NODE_ENV and API URLs. This allows you to maintain separate configurations and output distinct development and production builds from the same codebase.

How does code splitting and minification work when bundling ESM modules with Bun?

Code splitting and minification work in Bun by enabling these flags in the build configuration to break ESM modules into smaller chunks and remove unnecessary characters. This produces smaller, cache-friendly bundles with hashed filenames for efficient client delivery.

What is the best way to configure Bun.build targets for different platforms?

The best way to configure Bun.build targets is by explicitly selecting the target platform in your build script. You can specify browser, node, or bun as the target and choose the correct module format, such as ESM, to ensure reliable execution across environments.

Does Bun support external sourcemaps and hashed filenames for production debugging?

Yes, Bun supports external sourcemaps and hashed filenames for production debugging. Configuring these options in your build setup ensures cache-friendly outputs while preserving the ability to trace errors back to original source code.

Why are my Bun production bundles oversized or inconsistent across environments?

Oversized or inconsistent Bun production bundles often result from missing optimizations like minification and code splitting, or lacking explicit target and format configurations. Defining environment builds with build-time defines like NODE_ENV ensures reliable, optimized outputs.