GitHub's April 2026 availability report details 10 incidents causing degraded performance across services. Key incidents include: an 8+ hour code search outage caused by a messaging infrastructure upgrade gone wrong; two Copilot coding agent outages affecting ~84% of new agent sessions due to a rate limiting bug and a caching bug; a GitHub Pages outage from an automated DNS tool erroneously deleting a DNS record; a Codespaces VS Code connectivity failure affecting ~40% of starts; a 6+ hour search outage on April 27 caused by large-scale anonymous scraping traffic from 600,000+ unique IPs saturating load balancers; and a broad April 23 incident where DNS infrastructure degradation cascaded across Copilot, Webhooks, Git Operations, Actions, and more. GitHub outlines remediation steps for each incident including improved monitoring, safer rollout processes, rate limit scoping fixes, and enhanced DDoS/scraping defenses.
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