Disruption with some GitHub services
Severity: Critical
Category: Misconfiguration
Service: GitHub
This summary is created by Generative AI and may differ from the actual content.
Overview
Disruption with some GitHub services, Copilot code completions experienced a significant service degradation, with up to 65% of code completion requests failed between 21:15 and 22:24 UTC on December 8, 2025.
Impact
Up to 65% of code completion requests failed
Trigger
Internal feature flag caused the primary model supporting Copilot code completions to appear unavailable to the backend service
Detection
Investigation started after reports of impacted performance for some GitHub services
Resolution
The issue was resolved once the flag was disabled
Root Cause
Internal feature flag caused the primary model supporting Copilot code completions to appear unavailable to the backend service