anchor.diff:  
   The only required environment variable is the unique key for the build that initiated the Test Analytics run (`BUILDKITE_ANALYTICS_KEY`).
   
  -If you're not using CI, you can still use Test Analytics by running an integration manually.
  +If you're not using CI, you can still use Test Analytics by running the [RSpec integration](#integrating-with-rspec), [JUnit import](#importing-junit-xml), or [JSON import](#importing-json), yourself to upload data to Test Analytics.
   
   ### RSpec on Buildkite
   
  
positive.code: Test Analytics uses the variables in the `run_env` attribute to populate test information:
  
  * if you're making the request in a Buildkite pipeline, you can use the Buildkite environment variables to set the metadata automatically, like in the following example:
  * if you're making it elsewhere, you'll need to [set them yourself](#environment-variables-other-ci-providers-and-integrations)
  
  
  
  Test Analytics uses the variables in the `run_env` attribute to populate test information. The only *required* variable is `key`, but other Test Analytics features such as linking back to the originating build, do require the [other variables](#environment-variables-other-ci-providers-and-integrations) to work.
  
  
negative.code: |--------------|--------------------------------------------------------------------------------------------------------------------------------------|
  | `key`        | a unique key for the build that initiated the Test Analytics run<br />`GITHUB_ACTION` and `GITHUB_RUN_NUMBER` and `GITHUB_RUN_ATTEMPT` |
  | `url`        | a URL that links to the build <br /> `GITHUB_REPOSITORY` and `GITHUB_RUN_ID`                                                         |
  | `branch`     | the branch or reference that this run is for<br />`GITHUB_REF`                                                                             |
  | `commit_sha` | the commit SHA for the head of the branch<br />`GITHUB_REF`                                                                          |
  | `number`     | the build number of the build<br />    `GITHUB_RUN_NUMBER`                                                                           |
  
  