anchor.diff:  
   The pipeline slug on Buildkite as used in URLs. The value cannot be modified.
   
  -Example: `"my-project"`
  +Example: `"my-pipeline"`
   
   <h3 class="h3-caps">BUILDKITE_PLUGINS_ENABLED</h3>
   
  
positive.code: 
  A list of the [experimental agent features](/docs/agent/v3#experimental-features) that are currently enabled. The value cannot be modified as an environment variable. The value can be set using the `--experiment` flag on the [`buildkite-agent start` command](/docs/agent/v3/cli-start#starting-an-agent) or in your [agent configuration file](/docs/agent/v3/configuration).
  
  Example: `"experiment1,experiment2"`
  
  <h3 class="h3-caps">BUILDKITE_AGENT_META_DATA_*</h3>
  
  
negative.code: 
  Example: `"production"`
  
  <h3 class="h3-caps">BUILDKITE_HOOKS_PATH</h3>
  
  The value of the `hooks-path` [agent configuration option](/docs/agent/v3/configuration). The value cannot be modified as an environment variable.
  