What services does A Major offer?

A Major offers web design, web app development, mobile app development (React Native, Swift, Flutter), SaaS product development, enterprise systems, UI/UX design, DevOps, performance optimization, MCP server development, AI agent infrastructure, MVP scoping, digital transformation, and engineering consultancy.

Where is A Major based?

A Major is based in Singapore and works with clients worldwide.

Do you work with international clients?

Yes. While headquartered in Singapore, A Major works with founders and businesses across Southeast Asia, Europe, and North America.

Ryu is an AI agent orchestration layer built by A Major. It enables teams to run, coordinate, and monitor AI agents at scale — connecting LLMs, tools, and workflows into reliable production systems.

Do you build MCP servers?

Yes. A Major builds Model Context Protocol (MCP) servers that connect AI agents to databases, APIs, and internal tools, enabling reliable LLM-powered workflows in production environments.

How much does CLI development cost?

CLI tools are relatively quick to build — a basic CLI takes 1-2 weeks, a full-featured CLI with interactive prompts, auto-update, and shell completions takes 3-6 weeks. Rust CLIs take slightly longer due to the language learning curve but produce superior distributable binaries.

TypeScript vs Rust for CLI tools?

TypeScript CLIs are faster to develop and can leverage the npm ecosystem. Rust CLIs start instantly, use less memory, and distribute as a single binary. Choose TypeScript for internal tools and npm-distributed CLIs; choose Rust for performance-critical tools or standalone distribution.

How do I distribute a CLI tool?

For Node.js CLIs: publish to npm with a bin field. For Rust CLIs: publish to crates.io or distribute binaries via GitHub Releases. Both can be installed via Homebrew with a custom tap.

bash — create-my-app

CLI Tools ToolingDeveloper tools built for the terminal

We build CLI tools for developer products — internal automation, developer experience tooling, scaffolding CLIs, and deployment scripts. Built in TypeScript/Node or Rust depending on performance requirements.

CLI (Command Line Interface) tools are the backbone of developer workflows — from project scaffolding and deployment scripts to internal automation and developer experience tooling. We build CLIs in TypeScript/Node.js for ecosystem compatibility or Rust for maximum performance and single-binary distribution. Modern CLI development includes interactive prompts (Clack, Inquirer, Bubbletea), rich terminal output with colors and spinners, auto-update mechanisms, shell completion scripts, and distribution via npm, Homebrew, or GitHub Releases.

Quick start

bash

# Create a TypeScript CLI
mkdir my-cli && cd my-cli
npm init -y
npm install commander clack

# Or create a Rust CLI
cargo init my-cli
cargo add clap --features derive

# Run your CLI
npx tsx src/index.ts  # TypeScript
cargo run              # Rust

Read the full documentation at github.com/tj/commander.js

Interactive prompts

Clack, Inquirer, or Bubbletea for guided interactive prompts — the same UX as create-next-app.

TypeScript with tsx

Node.js CLIs with TypeScript, tsx for fast execution, and Commander or yargs for argument parsing.

Rust CLIs with Clap

Single-binary Rust CLIs with Clap — instant startup, no runtime dependency, distributable as a binary.

npm / Homebrew distribution

Publish to npm, GitHub Releases, or Homebrew tap — users install with familiar package managers.

Auto-update mechanism

Detect new versions and prompt to update — CLIs that stay current without user intervention.

Manpage & shell completion

Generated man pages and bash/zsh/fish completion scripts — professional-grade CLI ergonomics.

Why it's hard

Cross-platform compatibility

CLIs must handle path separators, shell differences, and encoding across Windows, macOS, and Linux. Testing on all target platforms is essential.

Distribution and updates

Distributing CLIs to non-developers (outside npm) requires packaging strategies — Homebrew taps, standalone binaries, or installer scripts. Auto-update mechanisms keep tools current.

Error handling and help text

CLI users can't see your source code. Clear error messages, --help documentation, and shell completions are the UX of command-line tools.

Best practices

Use interactive prompts for complex inputs

Libraries like Clack or Inquirer provide guided interactive flows — the same UX as create-next-app for your own CLI tools.

Provide shell completions

Generate bash/zsh/fish completion scripts so users can tab-complete commands and flags — essential for professional CLI ergonomics.

Distribute as a single binary for Rust CLIs

Rust CLIs compile to a single binary with no runtime dependencies — users download and run without installing Node.js or Python.

Useful resources

Commander.js (Node CLI)Clap (Rust CLI)Clack (Interactive prompts)Building CLIs with Node.js

Frequently asked questions

Rust

Memory-safe systems programming at native speed

Node.js

JavaScript all the way down

Looking for end-to-end delivery? These services complement CLI Tools projects.

Want to build with CLI Tools?

Talk to our engineering team about your CLI Tools architecture. We'll respond within 24 hours.

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CLI Tools ToolingDeveloper tools built for the terminal