diff --git a/github-actions/upload-metrics-artifact/README.md b/github-actions/upload-metrics-artifact/README.md
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+# Upload Metrics Artifact
+
+This GitHub Action will upload metrics collected by CI run to GitHub Artifacts.
+This allows for future runners or other actions to download the artifact and
+upload them to S3 bucket that is used for monitoring GitHub CI.
+
+You can follow the discussion in [the corresponding GitHub issue][issue-source].
+
+## Usage
+
+If the default metrics' file path is `build/cpu-usage.csv`, you don't need to
+pass any argument to the runner.
+
+Note: the default metrics' file path for Rust compiler repository is
+`build/cpu-usage.csv` as you can see in the workflow file
+[here][rust-cpu-collector-ci] and [here][rust-cpu-collector-script].
+
+```yaml
+- name: Upload metrics artifact
+  uses: rust-lang/simpleinfra/github-actions/upload-metrics-artifact@master
+```
+
+If the metrics is stored in a different file, you can pass the path to the
+action:
+
+```yaml
+- name: Upload metrics artifact
+  uses: rust-lang/simpleinfra/github-actions/upload-metrics-artifact@master
+  with:
+    metrics-filepath: |
+      file1.csv
+      file2.csv
+      file3.csv
+```
+
+## Development
+
+This is a composite GitHub Action, and as such, you can run the action using
+[`act`][act-github]. You can also use one of the above syntaxes in your own
+fork of this repository. Here's one [test-run][first-test-run] for your
+reference.
+
+[issue-source]: https://github.com/rust-lang/infra-team/issues/74
+[act-github]: https://github.com/nektos/act
+[rust-cpu-collector-ci]: https://github.com/rust-lang/rust/blob/1.72.1/.github/workflows/ci.yml#L90
+[rust-cpu-collector-script]: https://github.com/rust-lang/rust/blob/1.72.1/src/ci/scripts/collect-cpu-stats.sh#L10
+[first-test-run]: https://github.com/meysam81/simpleinfra/actions/runs/6283641163
diff --git a/github-actions/upload-metrics-artifact/action.yml b/github-actions/upload-metrics-artifact/action.yml
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+name: Upload metrics artifact
+description: Upload collected [cpu] metrics to GitHub artifact to later upload to S3 bucket from a trusted runner
+
+inputs:
+  metrics-filepath:
+    description: Comma or space separated list of metrics files to be uploaded to GitHub artifact
+    required: true
+    default: build/cpu-usage.csv
+
+runs:
+  using: composite
+  steps:
+    - name: Upload metrics artifact
+      uses: actions/upload-artifact@v3
+      with:
+        name: Upload metrics
+        path: ${{ github.workspace }}/${{ inputs.metrics-filepath }}