CI-Components.md

 # CI Components
 
+## Overview
+A reusable and configurable automated build and test job for your project.
+
+## Usage
+
 1. Choose a component based on project language:
 
 - [Java build/test via Gradle](https://code.jlab.org/accelerator/iac/release-workflow/-/blob/main/templates/ci-gradle.yml) - `component: $CI_SERVER_FQDN/accelerator/iac/release-workflow/ci-gradle@v1`
@@ -11,3 +16,25 @@
 stages:
  - test
 ```
+
+3. [Control when the job should run](https://docs.gitlab.com/ci/jobs/job_control/) via [rules](https://docs.gitlab.com/ci/yaml/#rules).  By default, the job will run on any push to GitLab.  Here are some common options:
+
+**Default**
+(same no rules)
+```
+  rules:
+    - when: always
+```
+
+**On src file change**
+```
+  rules:
+    - changes:
+      - source/**/*
+```
+
+
+
+
+
+ 
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