abcd site setup rewrites an existing deployment environment through PUT /repos/{r}/environments/{env} with only deployment_branch_policy in the body, and that endpoint replaces the whole protection set, so a site environment carrying required reviewers, a wait timer or prevent_self_review loses them after a confirmation that names only a branch restriction (setup.go plan.put, forge.go PutEnvironment).

abcd site setup rewrites an existing deployment environment through PUT /repos/{r}/environments/{env} with only deployment_branch_policy in the body, and that endpoint replaces the whole protection set, so a site environment carrying required reviewers, a wait timer or prevent_self_review loses them after a confirmation that names only a branch restriction (setup.go plan.put, forge.go PutEnvironment).

Grounds

• pursued: an existing environment's reviewers and wait timer survive any setup run; a forge write to the environment endpoint for an environment that already exists would show it wrong