Gamsjaeger's vocabulary for verifying that a proposed commit matches the team's intentions. A check is any verification step. Automated checks are called tests (executed in CI). Manual checks are called reviews, performed by humans in GitHub. A flag is a failed manual check — a reviewer's comment noting a violation of an agreed rule. Both kinds are equally important, but automated checks are preferred because they remove the need for human attention on repetitive work. A key assumption: on reviews, humans should act as if they were a perfect tool — flag everything that a perfect tool would flag, even if today's tools miss it.