brain backup 2026-09-14

projects/ckmath-interactive-pilot/src/catalog.mjs

@@ -0,0 +1,20 @@
+export function isGradeThreeSource(source) {
+  return /\bGrade 3\b/i.test(source.title ?? '') || /(?:^|[_-])G3(?:[_-]|$)/i.test(source.filename ?? '');
+}
+
+export function classifyUnit(filename) {
+  const name = String(filename);
+  if (/CKMath/i.test(name)) return 'Math';
+  if (/CKSci/i.test(name)) return 'Science';
+  if (/CKLA/i.test(name)) return 'Language Arts';
+  if (/CKHG|CKIYS|LABB_CKHG/i.test(name)) return 'History & Geography';
+  if (/CKMusic|CKVA/i.test(name)) return 'Arts';
+  return 'Other';
+}
+
+export function roleForPdf(filename) {
+  const name = String(filename);
+  if (/(?:^|[_-])(TG|TeacherGuide|Teacher[_ -]?Guide)(?:[_-]|\.)/i.test(name)) return 'Teacher Guide';
+  if (/(?:^|[_-])(SR|StudentReader|Student[_ -]?Reader|ActivityBook)(?:[_-]|\.)/i.test(name)) return 'Student Reader';
+  return 'Reference';
+}

projects/ckmath-interactive-pilot/src/library.mjs

@@ -0,0 +1,15 @@
+export function subjectsFor(units) {
+  return ['All', ...new Set(units.map((unit) => unit.subject).filter(Boolean))].sort((a, b) => {
+    if (a === 'All') return -1;
+    if (b === 'All') return 1;
+    return a.localeCompare(b);
+  });
+}
+
+export function filterUnits(units, subject) {
+  return subject === 'All' ? units : units.filter((unit) => unit.subject === subject);
+}
+
+export function teacherGuidesFor(unit) {
+  return (unit.materials ?? []).filter((material) => material.role === 'Teacher Guide');
+}

projects/ckmath-interactive-pilot/src/server_catalog.py

@@ -0,0 +1,18 @@
+def material_index(catalog):
+    """Map only generated catalog IDs to their exact archive member paths."""
+    index = {}
+    for unit in catalog.get('units', []):
+        archive_name = unit.get('filename')
+        if not archive_name:
+            continue
+        for material in unit.get('materials', []):
+            material_id = material.get('id')
+            internal_path = material.get('internal_path')
+            if material_id and internal_path:
+                index[material_id] = (archive_name, internal_path)
+    return index
+
+
+def lookup_material(index, material_id):
+    """Return a declared pair or None; request input is never a filesystem path."""
+    return index.get(material_id)

projects/ckmath-interactive-pilot/src/session.mjs

@@ -0,0 +1,16 @@
+export function isCorrectTotal(value) {
+  return Number(String(value).trim()) === 14;
+}
+
+export function isCorrectEquation(value) {
+  const numbers = String(value).match(/\d+/g)?.map(Number) ?? [];
+  if (numbers.length !== 3) return false;
+  const [first, second, product] = numbers;
+  return product === 14 && ((first === 7 && second === 2) || (first === 2 && second === 7));
+}
+
+export function hasReasoningEvidence(value) {
+  const text = String(value).toLowerCase();
+  const strategy = /group|each|repeated|add|plus/.test(text);
+  return strategy && /\b14\b/.test(text);
+}