Update content_pack.py

content_pack.py

@@ -362,6 +362,19 @@ def get_adjectives(pack: dict = None) -> list:
 # ---------------------------------------------------------------------------
 
 LESSON_CONTENT = {
+
+    # -----------------------------------------------------------------------
+    # topic_marker + copula are taught together as Grammar 1.1
+    # The slides array drives the 6-slide breakdown per team lead's spec.
+    # Slide types:
+    #   intro    — formula display only  (formula, sub_formula)
+    #   body     — explanation paragraph  (text, highlight)
+    #   diagram  — labelled formula       (formula_parts[])
+    #   rules    — conjugation rule box   (sections[{label, rules[]}])
+    #   examples — annotated examples     (items[{korean, english, annotations[]}])
+    #   practice — choose-correct MCQ     (question, items[{korean, choices, answer}])
+    # -----------------------------------------------------------------------
+
     "topic_marker": {
         "explanation": {
             "title": "Topic Markers 은/는",
@@ -372,6 +385,105 @@ LESSON_CONTENT = {
             ),
             "pattern": "N (Consonant) + 은 / N (Vowel) + 는",
             "notes": "The topic marker tells the listener what the sentence is about.",
+            "slides": [
+                {
+                    "index": 0,
+                    "type": "intro",
+                    "title": "Grammar 1.1",
+                    "formula": "N1 은/는 N2 이에요/예요.",
+                    "formula_colors": {"N1": "#F5A623", "N2": "#E8824A"},
+                    "sub_formula": "N1 = N2",
+                    "sub_formula_colors": {"N1": "#F5A623", "N2": "#E8824A"},
+                },
+                {
+                    "index": 1,
+                    "type": "body",
+                    "title": "N1 은/는 N2 이에요/예요.  N1=N2",
+                    "text": (
+                        "The equational expression, where two nouns are involved, is the "
+                        "most basic sentence structure in Korean. The first noun is followed "
+                        "by a topic marker –은/는 and the second noun is followed by the "
+                        "copular –이에요/예요. The topic marker –은/는 indicates that the "
+                        "preceding noun is the topic of the sentence."
+                    ),
+                    "highlight": "most basic sentence structure",
+                    "highlight_color": "#E8292A",
+                },
+                {
+                    "index": 2,
+                    "type": "diagram",
+                    "title": "Noun 1 = Noun 2",
+                    "formula": "N1 은/는 N2 이에요/예요.",
+                    "formula_colors": {"N1": "#F5A623", "N2": "#E8824A"},
+                    "formula_parts": [
+                        {"label": "Topic",        "color": "#F5A623", "points_to": "N1"},
+                        {"label": "Topic marker", "color": "#333333", "points_to": "은/는"},
+                        {"label": "Explanation",  "color": "#E8824A", "points_to": "N2"},
+                        {"label": "to be",        "color": "#333333", "points_to": "이에요/예요"},
+                    ],
+                },
+                {
+                    "index": 3,
+                    "type": "rules",
+                    "title": "N1 은/는 N2 이에요/예요.  N1=N2",
+                    "sections": [
+                        {
+                            "label": "Topic Marker",
+                            "rules": [
+                                "Vowel-ending noun + 는",
+                                "Consonant-ending noun + 은",
+                            ],
+                        },
+                        {
+                            "label": "Copular",
+                            "rules": [
+                                "Vowel-ending noun + 예요",
+                                "Consonant-ending noun + 이에요",
+                            ],
+                        },
+                    ],
+                },
+                {
+                    "index": 4,
+                    "type": "examples",
+                    "title": "N1 은/는 N2 이에요/예요.  N1=N2",
+                    "items": [
+                        {
+                            "korean":  "저는 캐나다 사람이에요.",
+                            "english": "I am Canadian.",
+                            "annotations": [
+                                {"syllable": "저", "marker": "는", "ending_type": "V", "color": "#4CAF50"},
+                            ],
+                        },
+                        {
+                            "korean":  "저스틴은 캐나다 사람이에요.",
+                            "english": "Justin is Canadian.",
+                            "annotations": [
+                                {"syllable": "저스틴", "marker": "은", "ending_type": "C", "color": "#4CAF50"},
+                            ],
+                        },
+                    ],
+                },
+                {
+                    "index": 5,
+                    "type": "practice",
+                    "title": "Which one is the correct ending?",
+                    "items": [
+                        {
+                            "korean":  "저는 민호",
+                            "choices": ["이에요", "예요"],
+                            "answer":  "예요",
+                            "hint":    "민호 ends with a vowel → 예요",
+                        },
+                        {
+                            "korean":  "선생님",
+                            "choices": ["이에요", "예요"],
+                            "answer":  "이에요",
+                            "hint":    "선생님 ends with consonant ㅁ → 이에요",
+                        },
+                    ],
+                },
+            ],
         },
         "example_sentences": [
             {
@@ -411,6 +523,75 @@ LESSON_CONTENT = {
             ),
             "pattern": "N (Consonant) + 이에요 / N (Vowel) + 예요",
             "notes": "이에요/예요 is the polite present tense of the copula (to be).",
+            "slides": [
+                {
+                    "index": 0, "type": "intro",
+                    "title": "Grammar 1.1 — Copula",
+                    "formula": "N1 은/는 N2 이에요/예요.",
+                    "formula_colors": {"N1": "#F5A623", "N2": "#E8824A"},
+                    "sub_formula": "N1 = N2",
+                    "sub_formula_colors": {"N1": "#F5A623", "N2": "#E8824A"},
+                },
+                {
+                    "index": 1, "type": "body",
+                    "title": "이에요/예요 — The Copula",
+                    "text": (
+                        "이에요/예요 is the polite present tense 'to be' verb (copula). "
+                        "It follows the second noun to complete the equational sentence N1 is N2. "
+                        "이에요 is used after nouns ending in a consonant. "
+                        "예요 is used after nouns ending in a vowel."
+                    ),
+                    "highlight": "most polite and common form",
+                    "highlight_color": "#E8292A",
+                },
+                {
+                    "index": 2, "type": "diagram",
+                    "title": "N2 이에요/예요",
+                    "formula": "N1 은/는 N2 이에요/예요.",
+                    "formula_colors": {"N1": "#F5A623", "N2": "#E8824A"},
+                    "formula_parts": [
+                        {"label": "Topic",       "color": "#F5A623", "points_to": "N1"},
+                        {"label": "Topic marker","color": "#333333", "points_to": "은/는"},
+                        {"label": "Noun 2",      "color": "#E8824A", "points_to": "N2"},
+                        {"label": "to be",       "color": "#333333", "points_to": "이에요/예요"},
+                    ],
+                },
+                {
+                    "index": 3, "type": "rules",
+                    "title": "Copula Conjugation",
+                    "sections": [
+                        {
+                            "label": "Copular",
+                            "rules": [
+                                "Vowel-ending noun + 예요",
+                                "Consonant-ending noun + 이에요",
+                            ],
+                        },
+                    ],
+                },
+                {
+                    "index": 4, "type": "examples",
+                    "title": "이에요/예요 Examples",
+                    "items": [
+                        {
+                            "korean": "저는 학생이에요.", "english": "I am a student.",
+                            "annotations": [{"syllable": "학생", "marker": "이에요", "ending_type": "C", "color": "#4CAF50"}],
+                        },
+                        {
+                            "korean": "제 이름은 민수예요.", "english": "My name is Minsu.",
+                            "annotations": [{"syllable": "민수", "marker": "예요", "ending_type": "V", "color": "#4CAF50"}],
+                        },
+                    ],
+                },
+                {
+                    "index": 5, "type": "practice",
+                    "title": "Which one is the correct ending?",
+                    "items": [
+                        {"korean": "저는 민호", "choices": ["이에요", "예요"], "answer": "예요",   "hint": "민호 ends with a vowel → 예요"},
+                        {"korean": "선생님",    "choices": ["이에요", "예요"], "answer": "이에요", "hint": "선생님 ends with consonant ㅁ → 이에요"},
+                    ],
+                },
+            ],
         },
         "example_sentences": [
             {
@@ -450,13 +631,83 @@ LESSON_CONTENT = {
             ),
             "pattern": "N (Consonant) + 이 아니에요 / N (Vowel/ㄹ) + 가 아니에요",
             "notes": "이/가 is the subject marker. 아니에요 means 'is not'.",
+            "slides": [
+                {
+                    "index": 0, "type": "intro",
+                    "title": "Negative Copula",
+                    "formula": "N1 은/는 N2 이/가 아니에요.",
+                    "formula_colors": {"N1": "#F5A623", "N2": "#E8824A"},
+                    "sub_formula": "N1 ≠ N2",
+                    "sub_formula_colors": {"N1": "#F5A623", "N2": "#E8824A"},
+                },
+                {
+                    "index": 1, "type": "body",
+                    "title": "이/가 아니에요 — Negative",
+                    "text": (
+                        "To say 'N1 is NOT N2', replace 이에요/예요 with 이/가 아니에요. "
+                        "이/가 is the subject marker attached to N2. "
+                        "아니에요 means 'is not'. "
+                        "Use 이 아니에요 after consonant-ending nouns, 가 아니에요 after vowels or ㄹ."
+                    ),
+                    "highlight": "NOT",
+                    "highlight_color": "#E8292A",
+                },
+                {
+                    "index": 2, "type": "diagram",
+                    "title": "N2 이/가 아니에요",
+                    "formula": "N1 은/는 N2 이/가 아니에요.",
+                    "formula_colors": {"N1": "#F5A623", "N2": "#E8824A"},
+                    "formula_parts": [
+                        {"label": "Topic",         "color": "#F5A623", "points_to": "N1"},
+                        {"label": "Topic marker",  "color": "#333333", "points_to": "은/는"},
+                        {"label": "Noun 2",        "color": "#E8824A", "points_to": "N2"},
+                        {"label": "subject marker","color": "#333333", "points_to": "이/가"},
+                        {"label": "is not",        "color": "#E8292A", "points_to": "아니에요"},
+                    ],
+                },
+                {
+                    "index": 3, "type": "rules",
+                    "title": "Negative Copula Conjugation",
+                    "sections": [
+                        {
+                            "label": "Subject marker on N2",
+                            "rules": [
+                                "Vowel-ending or ㄹ-ending noun + 가 아니에요",
+                                "Consonant-ending noun + 이 아니에요",
+                            ],
+                        },
+                    ],
+                },
+                {
+                    "index": 4, "type": "examples",
+                    "title": "이/가 아니에요 Examples",
+                    "items": [
+                        {
+                            "korean": "이것은 물이 아니에요.", "english": "This is not water.",
+                            "annotations": [{"syllable": "물", "marker": "이 아니에요", "ending_type": "C(ㄹ→이)", "color": "#E8292A"}],
+                        },
+                        {
+                            "korean": "이분은 의사가 아니에요.", "english": "This person is not a doctor.",
+                            "annotations": [{"syllable": "의사", "marker": "가 아니에요", "ending_type": "V", "color": "#E8292A"}],
+                        },
+                    ],
+                },
+                {
+                    "index": 5, "type": "practice",
+                    "title": "Choose the correct negative ending.",
+                    "items": [
+                        {"korean": "물", "choices": ["이 아니에요", "가 아니에요"], "answer": "이 아니에요", "hint": "물 ends in ㄹ (consonant) → 이 아니에요"},
+                        {"korean": "의사", "choices": ["이 아니에요", "가 아니에요"], "answer": "가 아니에요", "hint": "의사 ends in vowel → 가 아니에요"},
+                    ],
+                },
+            ],
         },
         "example_sentences": [
             {
                 "positive": {"korean": "이것은 물이에요.", "english": "This is water."},
                 "negative": {"korean": "이것은 물이 아니에요.", "english": "This is not water."},
                 "focus_word": "물이 아니에요",
-                "rule_shown": "물 (consonant ending ㄹ) → 가 아니에요",
+                "rule_shown": "물 (consonant ending ㄹ) → 이 아니에요",
             },
             {
                 "positive": {"korean": "저는 학생이에요.", "english": "I am a student."},
@@ -489,6 +740,82 @@ LESSON_CONTENT = {
             ),
             "pattern": "V-stem + 는다고/ㄴ다고  |  Adj + 다고  |  V(past) + 었/았다고",
             "notes": "했어요 (said) or 해요 (says) follows 다고 in most sentences.",
+            "slides": [
+                {
+                    "index": 0, "type": "intro",
+                    "title": "Indirect Quotation — Statements",
+                    "formula": "[Speaker]이/가 [sentence]다고 했어요.",
+                    "formula_colors": {},
+                    "sub_formula": "'...' → ...다고 했어요",
+                    "sub_formula_colors": {},
+                },
+                {
+                    "index": 1, "type": "body",
+                    "title": "Reporting What Someone Said",
+                    "text": (
+                        "Use 다고 했어요 to report statements someone made. "
+                        "The direct speech quote is transformed: drop 요 from polite endings "
+                        "and attach 다고. Action verbs use 는다고, adjectives use 다고 directly, "
+                        "past tense uses 었/았다고."
+                    ),
+                    "highlight": "report statements",
+                    "highlight_color": "#E8292A",
+                },
+                {
+                    "index": 2, "type": "diagram",
+                    "title": "Structure of 다고",
+                    "formula": "[Speaker] [sentence-stem]다고 했어요.",
+                    "formula_colors": {},
+                    "formula_parts": [
+                        {"label": "Speaker + 이/가", "color": "#F5A623", "points_to": "Speaker"},
+                        {"label": "verb/adj stem",   "color": "#E8824A", "points_to": "sentence-stem"},
+                        {"label": "quotation marker","color": "#333333", "points_to": "다고"},
+                        {"label": "said",            "color": "#333333", "points_to": "했어요"},
+                    ],
+                },
+                {
+                    "index": 3, "type": "rules",
+                    "title": "다고 Conjugation Rules",
+                    "sections": [
+                        {
+                            "label": "Action verb (present)",
+                            "rules": ["V-stem (consonant) + 는다고", "V-stem (vowel/ㄹ) + ㄴ다고"],
+                        },
+                        {
+                            "label": "Adjective / 이다",
+                            "rules": ["Adj-stem + 다고", "N + 이다 → 이라고"],
+                        },
+                        {
+                            "label": "Past tense",
+                            "rules": ["V/Adj past stem + 었/았다고"],
+                        },
+                    ],
+                },
+                {
+                    "index": 4, "type": "examples",
+                    "title": "다고 Examples",
+                    "items": [
+                        {
+                            "korean": "민수는 등록금이 너무 비싸다고 했어요.",
+                            "english": "Minsu said that the tuition is too expensive.",
+                            "annotations": [{"syllable": "비싸다", "marker": "다고", "ending_type": "Adj", "color": "#4CAF50"}],
+                        },
+                        {
+                            "korean": "친구가 공부한다고 했어요.",
+                            "english": "My friend said that they study.",
+                            "annotations": [{"syllable": "공부하", "marker": "ㄴ다고", "ending_type": "V(vowel)", "color": "#4CAF50"}],
+                        },
+                    ],
+                },
+                {
+                    "index": 5, "type": "practice",
+                    "title": "Choose the correct 다고 form.",
+                    "items": [
+                        {"korean": "비싸요 → 비싸___", "choices": ["다고", "는다고", "았다고"], "answer": "다고", "hint": "비싸다 is an adjective → 다고"},
+                        {"korean": "먹어요 → 먹___", "choices": ["다고", "는다고", "ㄴ다고"], "answer": "는다고", "hint": "먹다 is an action verb (consonant stem) → 는다고"},
+                    ],
+                },
+            ],
         },
         "example_sentences": [
             {
@@ -516,11 +843,84 @@ LESSON_CONTENT = {
             "title": "Indirect Quotation — Commands",
             "body": (
                 "(으)라고 is used to report commands or requests. "
-                "지 말라고 is used to report negative commands (telling someone not to do something). "
-                "달라고 reports requests (please give/do for me). 주라고 reports 'please do'."
+                "지 말라고 is used to report negative commands. "
+                "달라고 reports requests (please give/do for me)."
             ),
             "pattern": "V-stem + (으)라고  |  V + 지 말라고  |  달라고 / 주라고",
             "notes": "The subject marker after the speaker is 이/가.",
+            "slides": [
+                {
+                    "index": 0, "type": "intro",
+                    "title": "Indirect Quotation — Commands",
+                    "formula": "[Speaker]이/가 [V](으)라고 했어요.",
+                    "formula_colors": {},
+                    "sub_formula": "'Do X!' → X(으)라고 했어요",
+                    "sub_formula_colors": {},
+                },
+                {
+                    "index": 1, "type": "body",
+                    "title": "Reporting Commands",
+                    "text": (
+                        "Use (으)라고 했어요 to report commands. "
+                        "If the command was negative ('Don't do X'), use 지 말라고 했어요. "
+                        "If reporting a request ('Please give me X'), use 달라고 했어요."
+                    ),
+                    "highlight": "commands and requests",
+                    "highlight_color": "#E8292A",
+                },
+                {
+                    "index": 2, "type": "diagram",
+                    "title": "(으)라고 Structure",
+                    "formula": "[Speaker]이/가 [V](으)라고 했어요.",
+                    "formula_colors": {},
+                    "formula_parts": [
+                        {"label": "Speaker + 이/가", "color": "#F5A623", "points_to": "Speaker"},
+                        {"label": "verb stem",       "color": "#E8824A", "points_to": "V"},
+                        {"label": "command marker",  "color": "#333333", "points_to": "(으)라고"},
+                        {"label": "said/told",       "color": "#333333", "points_to": "했어요"},
+                    ],
+                },
+                {
+                    "index": 3, "type": "rules",
+                    "title": "(으)라고 Conjugation Rules",
+                    "sections": [
+                        {
+                            "label": "Positive command",
+                            "rules": ["V-stem (vowel) + 라고", "V-stem (consonant) + 으라고"],
+                        },
+                        {
+                            "label": "Negative command",
+                            "rules": ["V + 지 말라고"],
+                        },
+                        {
+                            "label": "Request",
+                            "rules": ["달라고 (give me)", "주라고 (do for me)"],
+                        },
+                    ],
+                },
+                {
+                    "index": 4, "type": "examples",
+                    "title": "(으)라고 Examples",
+                    "items": [
+                        {
+                            "korean": "선생님이 조용히 하라고 했어요.", "english": "The teacher told us to be quiet.",
+                            "annotations": [{"syllable": "하", "marker": "라고", "ending_type": "V", "color": "#4CAF50"}],
+                        },
+                        {
+                            "korean": "엄마가 뛰지 말라고 했어요.", "english": "Mom told us not to run.",
+                            "annotations": [{"syllable": "뛰", "marker": "지 말라고", "ending_type": "Neg", "color": "#E8292A"}],
+                        },
+                    ],
+                },
+                {
+                    "index": 5, "type": "practice",
+                    "title": "Choose the correct command form.",
+                    "items": [
+                        {"korean": "가다 (go) → positive command", "choices": ["가라고", "가지 말라고", "달라고"], "answer": "가라고", "hint": "가다: vowel stem → 라고"},
+                        {"korean": "먹다 (eat) → negative command", "choices": ["먹으라고", "먹지 말라고", "달라고"], "answer": "먹지 말라고", "hint": "Negative command → 지 말라고"},
+                    ],
+                },
+            ],
         },
         "example_sentences": [
             {
@@ -549,11 +949,80 @@ LESSON_CONTENT = {
             "body": (
                 "냐고 is used to report questions. "
                 "Attach to verb/adjective stems. "
-                "If the stem ends in ㄹ, drop ㄹ before adding 냐고. "
-                "물었어요 (asked) or 물어봤어요 typically follows."
+                "If the stem ends in ㄹ, drop ㄹ before adding 냐고."
             ),
             "pattern": "V/Adj-stem + 냐고 (drop ㄹ from ㄹ-irregular stems)",
             "notes": "냐고 replaces the question ending 아요/어요/이에요.",
+            "slides": [
+                {
+                    "index": 0, "type": "intro",
+                    "title": "Indirect Quotation — Questions",
+                    "formula": "[Speaker]이/가 [V/Adj]냐고 물었어요.",
+                    "formula_colors": {},
+                    "sub_formula": "'Is X?' → X냐고 물었어요",
+                    "sub_formula_colors": {},
+                },
+                {
+                    "index": 1, "type": "body",
+                    "title": "Reporting Questions",
+                    "text": (
+                        "Use 냐고 물었어요 to report yes/no or wh-questions. "
+                        "Drop the polite ending (아요/어요) and attach 냐고. "
+                        "For ㄹ-stem verbs, drop ㄹ before adding 냐고. "
+                        "물었어요 means 'asked'."
+                    ),
+                    "highlight": "Drop ㄹ before 냐고",
+                    "highlight_color": "#E8292A",
+                },
+                {
+                    "index": 2, "type": "diagram",
+                    "title": "냐고 Structure",
+                    "formula": "[Speaker] [stem]냐고 물었어요.",
+                    "formula_colors": {},
+                    "formula_parts": [
+                        {"label": "Speaker + 이/가", "color": "#F5A623", "points_to": "Speaker"},
+                        {"label": "verb/adj stem",   "color": "#E8824A", "points_to": "stem"},
+                        {"label": "question marker", "color": "#333333", "points_to": "냐고"},
+                        {"label": "asked",           "color": "#333333", "points_to": "물었어요"},
+                    ],
+                },
+                {
+                    "index": 3, "type": "rules",
+                    "title": "냐고 Rules",
+                    "sections": [
+                        {
+                            "label": "Standard",
+                            "rules": ["V/Adj stem + 냐고", "쉬다 → 쉬냐고", "가다 → 가냐고"],
+                        },
+                        {
+                            "label": "ㄹ-stem (drop ㄹ)",
+                            "rules": ["알다 → 아냐고", "살다 → 사냐고"],
+                        },
+                    ],
+                },
+                {
+                    "index": 4, "type": "examples",
+                    "title": "냐고 Examples",
+                    "items": [
+                        {
+                            "korean": "지혜는 지금 쉬냐고 물었어요.", "english": "Jihye asked if I am resting now.",
+                            "annotations": [{"syllable": "쉬", "marker": "냐고", "ending_type": "V", "color": "#4CAF50"}],
+                        },
+                        {
+                            "korean": "친구가 어디 가냐고 물었어요.", "english": "My friend asked where I was going.",
+                            "annotations": [{"syllable": "가", "marker": "냐고", "ending_type": "V", "color": "#4CAF50"}],
+                        },
+                    ],
+                },
+                {
+                    "index": 5, "type": "practice",
+                    "title": "Choose the correct 냐고 form.",
+                    "items": [
+                        {"korean": "쉬다 → 쉬___", "choices": ["냐고", "으냐고", "았냐고"], "answer": "냐고", "hint": "쉬다 vowel stem → 쉬냐고"},
+                        {"korean": "알다 (ㄹ-stem) → ___냐고", "choices": ["알", "아", "알으"], "answer": "아", "hint": "ㄹ-stem: drop ㄹ → 아냐고"},
+                    ],
+                },
+            ],
         },
         "example_sentences": [
             {
@@ -586,6 +1055,71 @@ LESSON_CONTENT = {
             ),
             "pattern": "V-stem + 자고 했어요/해요",
             "notes": "자 is the plain form suggestion ending. 자고 = quoting that suggestion.",
+            "slides": [
+                {
+                    "index": 0, "type": "intro",
+                    "title": "Indirect Quotation — Suggestions",
+                    "formula": "[Speaker]이/가 [V]자고 했어요.",
+                    "formula_colors": {},
+                    "sub_formula": "'Let's X!' → X자고 했어요",
+                    "sub_formula_colors": {},
+                },
+                {
+                    "index": 1, "type": "body",
+                    "title": "Reporting Suggestions",
+                    "text": (
+                        "자 is the plain-form suggestion ending meaning 'let's'. "
+                        "To report a suggestion in indirect speech, attach 자고 to the verb stem. "
+                        "자고 했어요 means 'suggested that we...'"
+                    ),
+                    "highlight": "let's",
+                    "highlight_color": "#E8292A",
+                },
+                {
+                    "index": 2, "type": "diagram",
+                    "title": "자고 Structure",
+                    "formula": "[Speaker] [V-stem]자고 했어요.",
+                    "formula_colors": {},
+                    "formula_parts": [
+                        {"label": "Speaker + 이/가", "color": "#F5A623", "points_to": "Speaker"},
+                        {"label": "verb stem",       "color": "#E8824A", "points_to": "V-stem"},
+                        {"label": "suggestion marker","color": "#333333", "points_to": "자고"},
+                        {"label": "said/suggested",  "color": "#333333", "points_to": "했어요"},
+                    ],
+                },
+                {
+                    "index": 3, "type": "rules",
+                    "title": "자고 Rule",
+                    "sections": [
+                        {
+                            "label": "Suggestion (all verbs)",
+                            "rules": ["V-stem + 자고 했어요", "가다 → 가자고 했어요", "먹다 → 먹자고 했어요"],
+                        },
+                    ],
+                },
+                {
+                    "index": 4, "type": "examples",
+                    "title": "자고 Examples",
+                    "items": [
+                        {
+                            "korean": "친구가 같이 밥 먹자고 했어요.", "english": "My friend suggested eating together.",
+                            "annotations": [{"syllable": "먹", "marker": "자고", "ending_type": "V", "color": "#4CAF50"}],
+                        },
+                        {
+                            "korean": "예나는 일찍 집에 가자고 했어요.", "english": "Yena suggested going home early.",
+                            "annotations": [{"syllable": "가", "marker": "자고", "ending_type": "V", "color": "#4CAF50"}],
+                        },
+                    ],
+                },
+                {
+                    "index": 5, "type": "practice",
+                    "title": "Choose the correct 자고 form.",
+                    "items": [
+                        {"korean": "가다 → 가___", "choices": ["자고", "라고", "냐고"], "answer": "자고", "hint": "Suggestion → V-stem + 자고"},
+                        {"korean": "공부하다 → 공부하___", "choices": ["자고", "라고", "다고"], "answer": "자고", "hint": "Suggestion → V-stem + 자고"},
+                    ],
+                },
+            ],
         },
         "example_sentences": [
             {
@@ -618,13 +1152,86 @@ LESSON_CONTENT = {
             ),
             "pattern": "V-stem + (으)ㄹ 걸 그랬다  |  V + 지 말 걸 그랬다",
             "notes": "그랬다 can be softened to 그랬어 in casual speech.",
+            "slides": [
+                {
+                    "index": 0, "type": "intro",
+                    "title": "Expressing Regret",
+                    "formula": "V + (으)ㄹ 걸 그랬다",
+                    "formula_colors": {},
+                    "sub_formula": "I should have done X / I shouldn't have done X",
+                    "sub_formula_colors": {},
+                },
+                {
+                    "index": 1, "type": "body",
+                    "title": "(으)ㄹ 걸 그랬다 — Regret",
+                    "text": (
+                        "(으)ㄹ 걸 그랬다 expresses regret that you did NOT do something. "
+                        "It means 'I should have done X'. "
+                        "지 말 걸 그랬다 expresses regret that you DID something — 'I shouldn't have done X'. "
+                        "Both refer to completed past situations."
+                    ),
+                    "highlight": "completed past regret",
+                    "highlight_color": "#E8292A",
+                },
+                {
+                    "index": 2, "type": "diagram",
+                    "title": "(으)ㄹ 걸 그랬다 Structure",
+                    "formula": "V-stem + (으)ㄹ 걸 그랬다.",
+                    "formula_colors": {},
+                    "formula_parts": [
+                        {"label": "verb stem",      "color": "#F5A623", "points_to": "V-stem"},
+                        {"label": "future modifier", "color": "#E8824A", "points_to": "(으)ㄹ"},
+                        {"label": "regret particle", "color": "#333333", "points_to": "걸"},
+                        {"label": "was so / did so","color": "#333333", "points_to": "그랬다"},
+                    ],
+                },
+                {
+                    "index": 3, "type": "rules",
+                    "title": "(으)ㄹ 걸 그랬다 Rules",
+                    "sections": [
+                        {
+                            "label": "Should have (positive regret)",
+                            "rules": [
+                                "V-stem (consonant) + 을 걸 그랬다",
+                                "V-stem (vowel/ㄹ) + ㄹ 걸 그랬다",
+                            ],
+                        },
+                        {
+                            "label": "Shouldn't have (negative regret)",
+                            "rules": ["V + 지 말 걸 그랬다"],
+                        },
+                    ],
+                },
+                {
+                    "index": 4, "type": "examples",
+                    "title": "(으)ㄹ 걸 그랬다 Examples",
+                    "items": [
+                        {
+                            "korean": "수업에 갈 걸 그랬어요.", "english": "I should have gone to class.",
+                            "annotations": [{"syllable": "가", "marker": "ㄹ 걸 그랬어요", "ending_type": "V(vowel)", "color": "#4CAF50"}],
+                        },
+                        {
+                            "korean": "그 음식을 먹지 말 걸 그랬어요.", "english": "I shouldn't have eaten that food.",
+                            "annotations": [{"syllable": "먹", "marker": "지 말 걸 그랬어요", "ending_type": "Neg", "color": "#E8292A"}],
+                        },
+                    ],
+                },
+                {
+                    "index": 5, "type": "practice",
+                    "title": "Choose the correct regret form.",
+                    "items": [
+                        {"korean": "자다 (sleep) → should have slept", "choices": ["잘 걸 그랬다", "자지 말 걸 그랬다", "잘 거예요"], "answer": "잘 걸 그랬다", "hint": "자다 vowel stem: ㄹ 걸 그랬다 → 잘 걸 그랬다"},
+                        {"korean": "먹다 (eat) → shouldn't have eaten", "choices": ["먹을 걸 그랬다", "먹지 말 걸 그랬다", "먹을 거예요"], "answer": "먹지 말 걸 그랬다", "hint": "Negative regret → 지 말 걸 그랬다"},
+                    ],
+                },
+            ],
         },
         "example_sentences": [
             {
                 "positive": {"korean": "수업에 갔어요.", "english": "I went to class."},
                 "negative": {"korean": "수업에 갈 걸 그랬어요.", "english": "I should have gone to class."},
                 "focus_word": "갈 걸 그랬어요",
-                "rule_shown": "가다 → 가 + ㄹ 걸 그랬어요",
+                "rule_shown": "가다 → 가 + ㄹ 걸 그랐어요",
             },
             {
                 "positive": {"korean": "그 음식을 먹었어요.", "english": "I ate that food."},
@@ -642,24 +1249,44 @@ LESSON_CONTENT = {
 }
 
 
-def get_lesson_content(grammar_rule: str) -> dict:
-    """Return full lesson content for a grammar rule (all 6 frames)."""
-    return LESSON_CONTENT.get(grammar_rule, {})
 
 
 def get_explanation(grammar_rule: str) -> dict:
-    """Return Frame 1+2 data: title, body, pattern, notes."""
-    content = LESSON_CONTENT.get(grammar_rule, {})
-    rule    = GRAMMAR_RULES.get(grammar_rule, {})
-    expl    = content.get("explanation", {})
+    """
+    Return lesson explanation data for a grammar rule.
+
+    Backwards compatible: all original flat fields (title, body, pattern,
+    notes, difficulty, lesson) are preserved.
+
+    New field: slides[] — array of 6 structured slide objects for the
+    multi-slide lesson breakdown per team lead spec.
+
+    Slide types:
+      intro    — formula + sub_formula display
+      body     — explanation paragraph with optional highlight
+      diagram  — labelled formula parts with arrows
+      rules    — conjugation rule box (sections with label + rules[])
+      examples — annotated example sentences
+      practice — choose-the-correct-ending MCQ
+    """
+    lc   = LESSON_CONTENT.get(grammar_rule, {})
+    rule = GRAMMAR_RULES.get(grammar_rule, {})
+    expl = lc.get("explanation", {})
     return {
+        # ── Original fields (unchanged) ──────────────────────────────────
         "grammar_rule":  grammar_rule,
         "title":         expl.get("title", rule.get("name", grammar_rule)),
-        "body":          expl.get("body", rule.get("description", "")),
+        "body":          expl.get("body",  rule.get("description", "")),
         "pattern":       expl.get("pattern", ""),
         "notes":         expl.get("notes", ""),
         "difficulty":    rule.get("difficulty", 1),
         "lesson":        rule.get("lesson", ""),
+        # ── New field ────────────────────────────────────────────────────
+        # slides: list of 6 dicts, each with "index" (0-5) and "type".
+        # Unity should step through slides[0] → slides[5] in sequence.
+        # If slides is empty, fall back to displaying title + body + pattern.
+        "slides":        expl.get("slides", []),
+        "slide_count":   len(expl.get("slides", [])),
     }