anchor.diff:  
   <h3 class="h3-caps">BUILDKITE_UNBLOCKER_TEAMS</h3>
   
  -A colon separated list of non-private team names that the unblocker belongs to. The value cannot be modified.
  +A colon separated list of non-private team names that the user who unblocked the build belongs to. The value cannot be modified.
   
   Example: `"everyone:platform"`
   
  
positive.code: 
  The name of the user who created the build. The value cannot be modified.
  
  Example: `"Tracy Tester"`
  
  <h3 class="h3-caps">BUILDKITE_BUILD_CREATOR_EMAIL</h3>
  
  The notification email of the user who created the build. The value cannot be modified.
  
  Example: `"tracy@acme-inc.com"`
  
  <h3 class="h3-caps">BUILDKITE_BUILD_CREATOR_TEAMS</h3>
  
  
negative.code: 
  <h3 class="h3-caps">BUILDKITE_S3_ACCESS_URL</h3>
  
  The access URL for your [private S3 bucket](/docs/agent/v3/cli-artifact#using-your-own-private-aws-s3-bucket), if you are using a proxy. The variable is read by the `buildkite-agent artifact upload` command, as well as during the artifact upload phase of [command steps](/docs/pipelines/command-step#command-step-attributes). The value can only be set by exporting the environment variable in the `environment`, `pre-checkout` or `pre-command` hooks.
  
  Example: `"https://buildkite-artifacts.example.com/"`
  
  <h3 class="h3-caps">BUILDKITE_S3_ACL</h3>
  
  The Access Control List to be set on artifacts being uploaded to your [private S3 bucket](/docs/agent/v3/cli-artifact#using-your-own-private-aws-s3-bucket). The variable is read by the `buildkite-agent artifact upload` command, as well as during the artifact upload phase of [command steps](/docs/pipelines/command-step#command-step-attributes). The value can only be set by exporting the environment variable in the `environment`, `pre-checkout` or `pre-command` hooks.
  
  Default: `"public-read"`
  
  <h3 class="h3-caps">BUILDKITE_S3_DEFAULT_REGION</h3>
  
  The region of your [private S3 bucket](/docs/agent/v3/cli-artifact#using-your-own-private-aws-s3-bucket). The variable is read by the `buildkite-agent artifact upload` command, as well as during the artifact upload phase of [command steps](/docs/pipelines/command-step#command-step-attributes). The value can only be set by exporting the environment variable in the `environment`, `pre-checkout` or `pre-command` hooks.
  
  Default: `"us-east-1"`
  
  <h3 class="h3-caps">BUILDKITE_S3_SECRET_ACCESS_KEY</h3>
  
  The secret access key for your S3 IAM user, for use with [private S3 buckets](/docs/agent/v3/cli-artifact#using-your-own-private-aws-s3-bucket). The variable is read by the `buildkite-agent artifact upload` command, as well as during the artifact upload phase of [command steps](/docs/pipelines/command-step#command-step-attributes). The value can only be set by exporting the environment variable in the `environment`, `pre-checkout` or `pre-command` hooks.
  
  Example: `"wJalrXUtnFEMI/K7MDENG/bPxRfiCYEXAMPLEKEY"`
  
  