How updates reach you
Once the app is listed, a new version is deployed to the Marketplace and takes effect for installed sites with no upgrade to schedule, no downtime window and no compatibility matrix to check. With two exceptions: a major update, and any update that adds a permission scope or a manufacturer host, requires approval by your Atlassian site administrator. That approval is what stops a fourth egress host appearing quietly.
Cadence
Releases will be made when there is something worth releasing rather than on a fixed date. Fixes for defects that affect correctness — a wrong status, a duplicated issue, a failed run — are made as soon as they are ready.
Notice we give
A change that would alter behaviour you may depend on — a default, a permission, a removed capability — will be announced in advance by email to the technical contact on the installation, on the terms in the support description. Fixes and additions that do not change existing behaviour ship without notice.
Versions follow semantic versioning, and every release has a note below, newest first. A major version would be reserved for a change that requires you to do something.