Terms beginning with H keep services healthy and releasable — hotfixes, health checks, Helm charts and horizontal scaling. Each definition is short, neutral and citable.
A hotfix is an urgent, narrowly scoped patch that fixes a critical bug in software already in production. It branches off the released tag, skips the queue of pending features, is tested in isolation, and ships out-of-band - so the live system stops bleeding without waiting for the next planned release.