[FEATURE] Update /usage in claude CLI to show the account I'm using to login

Preflight Checklist

• [x] I have searched existing requests and this feature hasn't been requested yet
• [x] This is a single feature request (not multiple features)

Problem Statement

I would like to see /usage in the CLI show which account on claude.ai I'm currently logged in as.

I have a work account and a personal subscription for claude.ai. I want to start using my expensive work account, but I can't tell if I'm logged in properly. I've tried running /login and in VSCode (in a remote environment). I see it bouncing around in OAuth, and it looks like it works, but /usage still shows me as logged in. I also tried pasting in the token manually. It still shows me logged in to my personal account. BUT that is not what I'm writing about.

I switched to the claude cli, and /usage does not show my email address. I asked Claude for help, and even after noodling around in the .claude directory, it can't find a way to tell me what my user id is.

It suggested I watch the usage on the accounts to figure it out (looks like I'm still on my personal account by the way) or file a feature request, which is what I'm doing now.

Proposed Solution

Show the email address I'm using for login from /usage. Alternatively, maybe add a /whoami command. The VSCode plugin shows an email address when I run /usage, by the way.

Alternative Solutions

I have been noodling around with this for 10 minutes or so. I'm still not logged in to my work accound. I'm considering just blowing away my ~/.claude directory. Seems like a shame, looks like there might be important stuff in there.

Priority

Medium - Would be very helpful

Feature Category

CLI commands and flags

Use Case Example

1. I have two claude.ai accounts, one for work and one for play. I don't want to mix the two for ethical and privacy reasons.
2. I just purchased an expensive plan for my business. I can't tell if I'm switched to it.

Additional Context

I've tried logging in a bunch of times as 'eric@arkove.ai'... VSCode's integration still shows my personal gmail account.

<img width="928" height="866" alt="Image" src="https://github.com/user-attachments/assets/cff1482a-015d-4720-82ee-738018933701" />