BCD

Command-line tools › C

Run crystal from ChatGPT or Claude

Fast and statically typed, compiled language with Ruby-like syntax. With BCD, ChatGPT, Claude and other AI apps can install and run crystal on your own computer and read what it prints.

Works on

About crystal

Version
1.22.2
License
Apache-2.0
Installs (last 365 days)
6,114 · #1,099 in Homebrew
Homepage
crystal-lang.org
Install
brew install crystal

Try asking

“Install crystal with Homebrew and show me its version”
“Read crystal --help and give me three useful examples for my files”
“Update crystal and tell me what changed”

Depends on

bdw-gc · gmp · libyaml · llvm · openssl@4 · pcre2 · pkgconf

Questions

Can ChatGPT run crystal on my computer?
Yes. With BCD on your Mac or Linux computer and command permission turned on for it, ChatGPT runs crystal there and reads the output. Claude and other apps with MCP connectors can too.

Do I need to install crystal first?
No. If Homebrew is installed, the AI can run brew install crystal for you.

Is it safe?
A new computer starts read-only: running commands is turned on per computer, and BCD reaches only the folders you allow.

Try it on your computer

BCD connects ChatGPT, Claude and other AI apps to your own Mac, Windows or Linux computer. One computer is free, with 20,000 tool calls a month and no card.

Program data from Homebrew, updated 2026-11-11. Installs are Homebrew's installs on request over the last 365 days.