[BUG] /login reports success but the bearer token is immediately invalid (401).

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

After running /login, Claude Code reports "Login successful" but any subsequent prompt immediately fails with:
API Error: 401 {"type":"error","error":{"type":"authentication_error","message":"Invalid bearer token"},"request_id":"req_..."}
Environment:

Claude Code v2.1.3
macOS (Homebrew node via nvm)
Account: Pro subscription

Troubleshooting attempted:

Uninstalled/reinstalled Claude Code (npm)
Deleted ~/.claude, ~/.claude.json, ~/Library/Application Support/Claude
Confirmed no ANTHROPIC_API_KEY environment variable set
Tried OAuth flow in both Chrome and Safari
Logged out/in to claude.ai before re-authorizing

Observed behavior:

~/.claude.json shows "hasAvailableSubscription": false despite active Pro subscription
Header shows "API Usage Billing" instead of subscription-based billing
OAuth completes successfully in browser but token is rejected by API

Expected behavior:
OAuth login should return a valid bearer token that authenticates against the API.

What Should Happen?

After completing the OAuth flow, Claude Code should:

Receive a valid bearer token that authenticates successfully against the API
Detect the active Pro subscription and set hasAvailableSubscription: true
Display "Pro subscription" (not "API Usage Billing") in the header
Allow prompts to execute without 401 errors

Error Messages/Logs

API Error: 401 {"type":"error","error":{"type":"authentication_error","message":"Invalid bearer token"},"request_id":"req_011CWzawigTy3WyPf7e5hM5x"} · Please run /login

Steps to Reproduce

Steps to Reproduce:

Ensure no ANTHROPIC_API_KEY environment variable is set (unset ANTHROPIC_API_KEY)
Remove existing Claude Code config: rm -rf ~/.claude ~/.claude.json
Run claude /login
Complete OAuth flow in browser (authorize access)
Observe "Login successful" message in terminal
Send any prompt (e.g., "hi")
Receive 401 "Invalid bearer token" error

Claude Model

None

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

Claude Code v2.1.3

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_