test(all): CI check to make sure description mentions every changed file

.github/workflows/check-description.yaml

@@ -0,0 +1,18 @@
+# .github/workflows/check-target.yaml
+name: Description mentions every changed file
+on:
+  pull_request:
+    types: [opened, edited, synchronize, reopened, labeled, unlabeled]
+jobs:
+  check-description:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v6
+      - name: Pull request description mentions every changed file
+        env:
+          PR_BODY: ${{ github.event.pull_request.body }}
+          GH_TOKEN: ${{ github.token }}
+        run: |
+          gh pr diff ${{ github.event.pull_request.number }} \
+            --repo ${{ github.repository }} --name-only > tmp_changed_files.txt
+          python3 .github/workflows/pr_description_check.py

.github/workflows/check-target.yaml

@@ -16,4 +16,4 @@ jobs:
             echo "Targeting main requires the 'release' label"
             echo "::error::Please change your target branch to the current working update branch (e.g. maizebus2.1). See https://docs.github.com/en/pull-requests/how-tos/create-pull-requests/changing-the-base-branch-of-a-pull-request"
             exit 1
-          fi
+          fi

.github/workflows/pr_description_check.py

@@ -0,0 +1,35 @@
+import os
+
+BLACK   = "\033[0;30m";
+RED     = "\033[0;31m";
+GREEN   = "\033[0;32m";
+YELLOW  = "\033[0;33m";
+BLUE    = "\033[0;34m";
+MAGENTA = "\033[0;35m";
+CYAN    = "\033[0;36m";
+WHITE   = "\033[0;37m";
+RESET   = "\033[0m";
+
+pr_body = os.environ["PR_BODY"]
+
+all_accounted_for = True
+
+with open("tmp_changed_files.txt") as f:
+    lines = f.read().split("\n")
+    for line in lines:
+        if line.strip() == "":
+            continue # Skip empty lines
+        parts = line.split("/")
+        filename = parts[len(parts) - 1]
+        if filename in pr_body:
+            print(GREEN+"✓ Changed file "+filename+" in PR description"+RESET)
+        else:
+            all_accounted_for = False
+            print(RED+"✗ Changed file "+filename+" not found in PR description"+RESET)
+
+
+if all_accounted_for:
+    exit(0)
+else:
+    print("::error::Please edit your pull request description to make sure it lists all changed files. See above for details")
+    exit(1)