anchor.diff:  include certain external integration helpers, such as those for APM agents.
   </p>
   
  -### Buildpack ordering
  +##<a id='buildpack-ordering'></a> Buildpack Ordering
   The compatibility layer generated by `cnb2cf` imposes some additional
   constraints on multi-buildpacks builds.  If a CF-compatible CNB is used during
  -multibuildpack builds. All subsequent buildpacks must also be CF-compatible CNB.
  +multi-buildpack builds. All subsequent buildpacks must also be CF-compatible CNB.
   In the example `cf push` below all buildpacks between
   `compat-cn_buildpack_1` and `compat-cn_buildpack_n` must be a CF-compatible CNB.
   
  
positive.code: 
  
  As a result we require that apps that contain `node_modules` or `npm-cache` must contain
  all of the dependencies required for a successfull `npm` or `yarn` install.
  
  For additional details on how the installation process is chosen of this buildpack see
  [ Node.js Cloud Native Buildpack installation process](../nodejs-cnb#npm-installation-process).
  
negative.code:   cf push -b bpack_1 -b bpack_2 -b compat-cn_bpack_1 ... -b compat-cn_bpack_n
  ```
  
  ##<a id='migration-guide'></a> Migration Guide:
  
  ###<a id='vendored-apps-with-NPM'></a> Vendored Apps with NPM
  
  Vendored app now must vendor ALL dependencies listed in `package.json`:
  
  + **Using `node_modules`:** Validate that all modules are vendored into the `node_modules` by the following:
  
        ```
           npm list
        ```
  
      If there are missing dependencies listed, this app will fail to build.
      Re-vendor by running the following in the root of your app:
  
        ```
            npm install <your preferred flags>
        ```
  
  + **Using `npm-cache`:** This is a newly added
  
       ```
          npm ci --cache npm-cache
       ```
  
  ###<a id='online-apps-npm'></a> Online Apps with NPM
  
  To deploy online apps on NPM with the Node.js CNB:
  
  + **Remove partially vendored components:**
  Online apps must not contain either a `node_modules` or `npm-cache`
  directory in the root directory of the app.
  Remove these before running `cf-push`.
  
  + **Make sure all dependencies are met:** Apps must contain all required dependencies
    after an install.
    If you provide a `package.json` and all modules cannot be installed
    the subsequent `npm list` check will cause the build to fail.
  
  ###<a id='yarn-apps'></a> Yarn Apps
  
  To deploy online apps on NPM with the Node.js CNB:
  
  + `yarn.lock` must agree with package.json
  
  Yarn apps will have dependencies installed from the `yarn.lock` file.
  This differs from the behavior of the Node.js Buildpack which installs
  dependencies from the `package.json` file.
  
  To avoid discrepancies in installed
  packages, generate an up to date `yarn.lock` file before running a `cf push`
  using:
  
  ```
  