docs/handbook/engineering/onboarding/release-cycle.mdx
This page explains how code moves from merge to production and why each step exists.
Merge to main (Mon–Thu) ──→ Deploy to staging
│
5 PM UTC Thu: staging freezes + RC tagged
│
Fri–Sat: canary runs daily from main
│
Sun 9 AM UTC: release-candidate → production
│ + deploy/cloud/YYYY-MM-DD branch created
Mon 9 AM UTC: self-hosted release published
Merges to main after 5 PM UTC on Thursday are not deployed to staging. At Thursday 5 PM UTC, the current staging image and commit are tagged as release-candidate — this is the stability gate for the week.
Why: Anything merged after the Thursday cut doesn't go to cloud production until the following week. This gives the team a predictable, stable window to validate changes before they reach customers.
At 9 AM UTC on Sunday, the cloud workflow promotes Thursday's release-candidate to production.
Why: By Sunday, the release candidate has soaked in the canary environment (Fri–Sat). If something is broken, we catch it before it reaches all customers.
After promotion, a deploy/cloud/YYYY-MM-DD branch is created.
On Monday at 9 AM UTC, the self-hosted release is published: git tag, GitHub release notes, and the release-candidate cloud image re-tagged as the versioned self-hosted image on Docker Hub and GHCR.
Why: Publishing the day after cloud promotion means self-hosted users get the exact same bits that cloud deployed on Sunday — no separate build, no divergence. The Monday timing also allows the team to catch any issues from Sunday's cloud deployment before the self-hosted image goes public.
| Time | What Happens |
|---|---|
| Mon–Thu, 9 AM–5 PM UTC | Merge to main → auto-deployed to staging |
| Mon–Thu, 5 PM–9 AM UTC | Merge to main → code in main only, staging frozen |
| Thu 5 PM UTC | Staging image + commit tagged as release-candidate |
| Fri–Sat | Canary deploys daily from main; cloud is quiet |
| Sun 9 AM UTC | release-candidate promoted to cloud production; deploy/cloud/YYYY-MM-DD branch created |
| Mon 9 AM UTC | Self-hosted release published (re-tags cloud RC image) |
Sometimes the cycle needs to be bypassed:
deploy/cloud/YYYY-MM-DD branch, then manually dispatch continuous-delivery-cloud.yml with action cloud-hotfix on that branch (not main). This builds the image and deploys directly to production — staging is not involved. After promotion, merge the hotfix branch into main — this automatically triggers tag-release-candidate, which SSHes to staging and retrags whatever image is running there as release-candidate. Sunday's scheduled run will then re-deploy what is already on prod — a safe no-op.emergency-cloud-deploy.yml to deploy directly to production, bypassing staging entirely. Use sparingly.Q: I merged at 6 PM UTC on a Wednesday. When does my code reach production?
Your code is in main but staging is frozen. It won't be included in the Thursday RC tag unless it lands before 5 PM UTC Thursday. If it misses that cut, it won't reach cloud production until the following Sunday.
Q: I merged at 10 AM UTC on a Wednesday. When does my code reach production? It deploys to staging immediately. As long as nothing breaks before Thursday 5 PM UTC, it will be included in the RC tag and will reach cloud production the following Sunday.
Q: Can I deploy to staging during the freeze window?
Yes, manually dispatch continuous-delivery.yml with deploy-staging. But consider that the content team may be relying on the frozen version.