BCD

Command-line tools › D

Run d2 from ChatGPT or Claude

Modern diagram scripting language that turns text to diagrams. With BCD, ChatGPT, Claude and other AI apps can install and run d2 on your own computer and read what it prints.

Works on

About d2

Version
0.9.0
License
MPL-2.0
Installs (last 365 days)
11,539 · #762 in Homebrew
Homepage
d2lang.com
Install
brew install d2

Try asking

“Install d2 with Homebrew and show me its version”
“Read d2 --help and give me three useful examples for my files”
“Update d2 and tell me what changed”

Questions

Can ChatGPT run d2 on my computer?
Yes. With BCD on your Mac or Linux computer and command permission turned on for it, ChatGPT runs d2 there and reads the output. Claude and other apps with MCP connectors can too.

Do I need to install d2 first?
No. If Homebrew is installed, the AI can run brew install d2 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.