Installation & Setup

Install the Diffie plugin into Claude Code with two slash commands, then sign in once to Diffie. Every Claude Code conversation in the project can use the plugin afterwards.

Requirements

Claude Code (CLI or IDE extension).
A Diffie account. The plugin signs you in on first use; no prior setup needed.
Bun runtime (used once by the login script).

Install

Open Claude Code and run these two slash commands:

/plugin marketplace add diffie-ai/diffie-skill
/plugin install diffie@diffie

The first command registers Diffie's plugin marketplace. The second pulls in the Diffie plugin. Claude Code confirms the install and the plugin becomes available to every Claude Code conversation in the current directory.

First-time authentication

The first time you ask the plugin to do anything, it opens a browser window and asks you to sign in to Diffie. That's it. Every session after that authenticates automatically, and if you ever get signed out the plugin re-opens the login for you.

Setup gotchas

“Plugin not found.” Make sure you ran the marketplace add before the install command. They're two separate steps.
“Login script failed to open a browser.” The script uses Bun; if you don't have Bun installed, install it from bun.sh.

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