[FEATURE] Add command to logout from all Claude Code instances

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

Currently, there's no documented way to logout from all active Claude Code instances simultaneously. This creates challenges for users who need to:

• Switch between multiple Anthropic accounts
• Revoke access across all devices for security reasons
• Clear authentication state when troubleshooting
• Manage sessions in multi-user or shared environment scenarios

Proposed Solution

Add a command to logout from all instances, such as:
claude logout --all

Or a more explicit version:
claude logout --all-sessions

This command should:

• Invalidate all active sessions/tokens for the current account
• Clear local credential storage
• Optionally provide feedback about which instances were logged out

Alternative Solutions

1. A web dashboard where users can view and revoke active sessions
2. Documentation on manually clearing credentials from system credential managers
3. A --global flag for the logout command

Priority

Medium - Would be very helpful

Feature Category

CLI commands and flags

Use Case Example

• Security: Immediately revoke access if credentials are compromised
• Account switching: Clean logout before authenticating with a different account
• Troubleshooting: Reset authentication state across all instances
• Enterprise/team environments: Proper session management

Additional Context

_No response_