Claim a handle for your account

Claim a Twitter-style handle for your account.

Handle requirements:

• 3-15 characters
• Lowercase letters, numbers, and underscores only
• Cannot start or end with underscore
• Cannot have consecutive underscores
• Certain handles are reserved (admin, grove, support, etc.)

Authentication: Authorization: Bearer <CLIENT_JWT>

Notes:

• Each account can only have one handle at a time
• Handles must be globally unique
• To change your handle, release and re-claim via this endpoint. For atomic renames (no release-then-claim race window), use the admin-only POST /admin/maintenance/change-handle endpoint.