feat: add Pie Charts topic (PROCEDURAL, ages 10–11, UK NC Y6)

data/dependencies.json

@@ -1,7 +1,7 @@
 {
   "version": "v1",
   "note": "`topicId` depends on `prerequisiteId` (the prerequisite). Directed edges of a DAG.",
-  "edgeCount": 3221,
+  "edgeCount": 3225,
   "dependencies": [
     {
       "topicId": "mt__00ZSLnB7p",
@@ -19328,6 +19328,30 @@
       "prerequisiteId": "mt_M_xcaRcvSo",
       "strength": "soft",
       "reason": "Knight knowledge provides military context for the Crusades"
+    },
+    {
+      "topicId": "mt_rnsjXikmnK",
+      "prerequisiteId": "mt_u5HkSxZECM",
+      "strength": "hard",
+      "reason": "Must understand data vocabulary (pictogram, bar chart, frequency) before working with pie charts"
+    },
+    {
+      "topicId": "mt_rnsjXikmnK",
+      "prerequisiteId": "mt_H6LlpWgEYS",
+      "strength": "hard",
+      "reason": "Interpreting bar graphs builds the foundational chart-reading skills needed for pie charts"
+    },
+    {
+      "topicId": "mt_rnsjXikmnK",
+      "prerequisiteId": "mt_4MFUAsbx_6",
+      "strength": "hard",
+      "reason": "Constructing pie charts requires measuring and drawing angles with a protractor"
+    },
+    {
+      "topicId": "mt_rnsjXikmnK",
+      "prerequisiteId": "mt_4Km38F4L-6",
+      "strength": "soft",
+      "reason": "Understanding fractions of a whole supports interpreting pie chart sectors as proportions"
     }
   ]
 }

data/manifest.json

@@ -9,31 +9,31 @@
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   ],
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+    "topics": 1591,
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       "English": 286,
       "History": 90,
       "Learning to Learn": 18,
       "Life Skills": 37,
-      "Mathematics": 503,
+      "Mathematics": 504,
       "Personal & Social Development": 88,
       "Science": 547
     },
-    "dependencies": 3221,
+    "dependencies": 3225,
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     "curriculumStandards": 3261,
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     "clusters": 183
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data/topics.json

@@ -1,6 +1,6 @@
 {
   "version": "v1",
-  "topicCount": 1590,
+  "topicCount": 1591,
   "topics": [
     {
       "id": "mt_AzTrT5ySCx",
@@ -11436,6 +11436,26 @@
       "assessmentPrompt": "Can {{name}} read a pie chart — for example, one showing how a family spends its weekly budget — and use it to answer questions and solve problems?",
       "standards": []
     },
+    {
+      "id": "mt_rnsjXikmnK",
+      "type": "PROCEDURAL",
+      "subject": "Mathematics",
+      "domain": "Data & Statistics",
+      "name": "Pie Charts",
+      "description": "Interpret and construct pie charts; understand that a pie chart represents proportions of a whole where each sector angle is proportional to the frequency it represents; use pie charts to solve comparison, sum, and proportion problems",
+      "ageRangeStart": 10,
+      "ageRangeEnd": 11,
+      "centrality": 0.15,
+      "evidence": [
+        "Interpret a pie chart by identifying what each sector represents and comparing relative proportions",
+        "Construct a pie chart from a frequency table by calculating each sector angle (category frequency ÷ total × 360°) and drawing with a protractor",
+        "Use a pie chart to solve problems — given the total, calculate the actual quantity represented by any sector"
+      ],
+      "assessmentPrompt": "Can {{name}} look at a pie chart — for example, one showing how a group of children spend their weekly pocket money — and answer questions like 'which category is the largest?' and 'if the total is £60, how much is spent on snacks?'",
+      "standards": [
+        "uk-nc-2013:Ma6/5.1a"
+      ]
+    },
     {
       "id": "mt_IHipFGTFEY",
       "type": "PROCEDURAL",