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Claude Code Sign-In Outage, 13 Nov 2026: A Recovery Plan for Vibe Coders
Claude.ai and Claude Code users hit sign-in errors on 13 November 2026. Anthropic acknowledged the authentication errors at 09:58 UTC [s2], deployed a fix [s3], and marked the incident resolved for Claude.ai and Claude Cowork at 11:58 UTC [s1]. A failed sign-in stops a prompt-driven project, so this guide covers what to do during the outage and after it.