Schedule data loop (spike): schema, validator, importer, MMED 2025, CI gate (#54)

.github/workflows/schedule-validate.yml

@@ -0,0 +1,58 @@
+# Gate schedule DATA edits before they reach the deploy branch (#54).
+#
+# This is the validation CI the existing jekyll.yml (build + deploy on push to gh-pages)
+# does NOT provide: a Jekyll build stays green even when a schedule is wrong, because
+# Liquid renders an undefined macro (e.g. `{{ mlect }}`) as the empty string. This workflow
+# runs tools/validate_schedule.py (Tier 0 schema + Tier 1 referential) so a bad edit fails a
+# check with a clear, annotated error instead of silently shipping a broken page.
+#
+# Make this a REQUIRED status check in branch protection on gh-pages to actually gate merges.
+name: Validate schedule data
+
+on:
+  pull_request:
+    paths:
+      - '_data/schedule/**'
+      - 'ICI3D.github.io'                       # submodule pointer = the shared people data
+      - 'schemas/**'
+      - 'tools/validate_schedule.py'
+      - '.github/workflows/schedule-validate.yml'
+  push:
+    branches: ['gh-pages']
+    paths:
+      - '_data/schedule/**'
+      - 'ICI3D.github.io'
+      - 'schemas/**'
+      - 'tools/validate_schedule.py'
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+jobs:
+  validate:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout (with the ICI3D.github.io submodule for _data/team)
+        uses: actions/checkout@v4
+        with:
+          submodules: recursive
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.11'
+
+      - name: Install validator dependencies
+        run: python -m pip install --quiet pyyaml jsonschema
+
+      - name: Validate every cohort schedule
+        run: |
+          shopt -s nullglob
+          files=(_data/schedule/*/*.yml)
+          if [ ${#files[@]} -eq 0 ]; then
+            echo "No cohort schedule files under _data/schedule/<clinic>/ — nothing to validate."
+            exit 0
+          fi
+          echo "Validating: ${files[*]}"
+          python3 tools/validate_schedule.py "${files[@]}" --github