diff --git a/ci/partials/code-coverage-diff.yml b/ci/partials/code-coverage-diff.yml
new file mode 100644
index 000000000..92834e345
--- /dev/null
+++ b/ci/partials/code-coverage-diff.yml
@@ -0,0 +1,15 @@
+platform: linux
+inputs:
+  - name: src
+  - name: pipeline-tasks
+outputs: [name: src]
+params:
+  GH_EMAIL: ((pages-operations-github-user-info.email))
+  GH_USERNAME: ((pages-operations-github-user-info.username))
+  GH_BOT_GPG_KEY: ((pages-operations-github-user-gpg.private_key))
+  GH_BOT_SSH_KEY: ((pages-gpg-operations-github-sshkey.private_key))
+  GH_BOT_GPG_TRUST: ((pages-operations-github-user-gpg-trust))
+  GH_TOKEN: ((pages-operations-ci-github-token))
+run:
+  dir: src
+  path: ci/tasks/code-coverage-diff.sh
diff --git a/ci/pipeline.yml b/ci/pipeline.yml
index 92b86ac01..0257e53c3 100644
--- a/ci/pipeline.yml
+++ b/ci/pipeline.yml
@@ -75,6 +75,17 @@ jobs:
         instance_vars:
           deploy-env: ((deploy-env))
 
+  #@ if/end env == 'dev':
+  - name: code-coverage-diff
+    plan:
+      - get: src
+        trigger: true
+      - get: general-task
+      - get: pipeline-tasks
+      - task: code-coverage-diff
+        image: general-task
+        file: src/ci/partials/code-coverage-diff.yml
+
   #@ if/end env == 'staging':
   - name: update-release-branch
     plan:
diff --git a/ci/tasks/code-coverage-diff.sh b/ci/tasks/code-coverage-diff.sh
new file mode 100755
index 000000000..dc3580597
--- /dev/null
+++ b/ci/tasks/code-coverage-diff.sh
@@ -0,0 +1,25 @@
+#!/bin/bash
+
+set -e
+
+source "$(dirname $PWD)/pipeline-tasks/scripts/github-setup.sh"
+
+# note our branch
+branch=$(git rev-parse --abbrev-ref HEAD)
+
+# generate test coverage
+cov_cmd="yarn test:rtl --coverageReporters json-summary --coverageDirectory tmp"
+tot_cmd="jq '.["total"]["lines"]["pct"]' tmp/coverage-summary.json"
+bash -c $cov_cmd
+newcc=$(bash -c $tot_cmd)
+git checkout main
+bash -c $cov_cmd
+oldcc=$(bash -c $tot_cmd)
+
+difcc=$(($newcc-$oldcc))
+
+gh pr comment $branch -b " \
+  ## :robot: This is an automated code coverage report
+  Total coverage (lines): $newcc%
+  Coverage diff: $diffcc%
+"