- Level
- confirmed
- Worst impact
- Degraded
- Down Index
- 19of 100
What to do
Check whether your product depends on GitHub. Check your stack
Paste a package.json, lockfile, Terraform or a list of domains at down.guide/stack to see every provider you depend on.Confirm your retries, queues and scheduled jobs caught up after the 2h 15m it lasted.
Anything that failed between 2026-04-27 16:48 UTC and 2026-04-27 19:02 UTC may need a replay.Subscribe to GitHub's feed to hear about the next one first. RSS feed
https://down.guide/feed?provider=github works in Slack (/feed subscribe), Discord feed bots and any RSS reader.
Updates from GitHub 5
- investigating
We are investigating reports of impacted performance for some GitHub services.
provider
- investigating
Copilot Cloud Agent (CCA) jobs using the Codex agent are failing after starting. To avoid this issue, please choose a different agent. We are investigating the cause and working towards remediation
provider
- investigating
We've found the issue and are working on deploying a solution to get Codex agent runs working again.
provider
- monitoring
The degradation has been mitigated. We are monitoring to ensure stability.
provider
- resolved
On April 22, 2026 from 18:49 to 19:32 UTC , the Copilot Cloud Agent service began failing during session execution for users running the Agent HQ Codex agent. Codex agent sessions failed to start for all entry points (issue assignment, @copilot comment mentions). 0.5% of total Copilot Cloud Agent jobs were impacted (~2,000 failed jobs). Copilot and other agent sessions were unaffected. This was caused by a model resolution mismatch in Codex agent sessions, resulting in an incompatible model being used at runtime. A mitigation was deployed to select a stable default model for Codex agent sessions. We are working to harden the underlying model-resolution path so it correctly scopes to the requesting agent's supported models to prevent similar failure mode in the future.
provider
Reports count in aggregate; nothing about you is shown.
Corrections
None so far.
Something wrong on this page? Report an error or send us a note. Every fix is listed here.
Questions about DWN-3b6e605744
Is GitHub still down?
No, this incident was resolved 2026-04-27 19:02 UTC. For GitHub's live state, see https://down.guide/github.
How long did it last?
2h 15m, from 2026-04-27 16:48 UTC to 2026-04-27 19:02 UTC, by the times GitHub posted.
What caused it?
GitHub hasn't published a root cause. If it does, it shows here.
Where does this come from?
GitHub's official status page, https://www.githubstatus.com, quoted verbatim. down.guide's own probes, reports and social counts are labeled as ours.