anchor.diff:  
   <h3 class="h3-caps">BUILDKITE_AGENT_META_DATA_*</h3>
   
  -The value of each [agent tag](/docs/agent/v3/cli-start#setting-tags). The tag name is appended to the end of the variable name. The name and value cannot be modified as an environment variable. They can be set using the `--tags` flag on the `buildkite-agent start` command, or in the [agent configuration file](/docs/agent/v3/configuration). The [Queue tag](/docs/agent/v3/queues) is specifically used for isolating jobs and agents, and appears as the `BUILDKITE_AGENT_META_DATA_QUEUE` environment variable. 
  +The value of each [agent tag](/docs/agent/v3/cli-start#setting-tags). The tag name is appended to the end of the variable name. The name and value cannot be modified as an environment variable. They can be set using the `--tags` flag on the `buildkite-agent start` command, or in the [agent configuration file](/docs/agent/v3/configuration). The [Queue tag](/docs/agent/v3/queues) is specifically used for isolating jobs and agents, and appears as the `BUILDKITE_AGENT_META_DATA_QUEUE` environment variable.
   
   Example: `"BUILDKITE_AGENT_META_DATA_TAGNAME=tagvalue"`, `"BUILDKITE_AGENT_META_DATA_QUEUE=some-queue"`
   
  
positive.code: 
  <h3 class="h3-caps">BUILDKITE_BIN_PATH</h3>
  
  The path to the `buildkite-agent` binary. The value cannot be modified as an environment variable.
  
  Example: `"/usr/local/bin/buildkite-agent"`
  
  
negative.code: 
  <h3 class="h3-caps">BUILDKITE_PLUGIN_VALIDATION</h3>
  
  Whether to validate plugin configuration and requirements. The value can be modified by exporting the environment variable in the `environment` or `pre-checkout` hooks, or in a `pipeline.yml` file. It can also be enabled using the `no-plugin-validation` [agent configuration option](/docs/agent/v3/configuration).
  
  Default: `"false"`
  
  