caspersimon · caspersimon · Mar 22, 2026 · Mar 22, 2026 · Mar 22, 2026 · Mar 22, 2026
diff --git a/.DS_Store b/.DS_Store
diff --git a/AGENTS.md b/AGENTS.md
@@ -10,15 +10,15 @@ Technical handoff for coding agents and contributors working on this repository.
 - No backend/runtime services required
 - Source dataset and generated card data are JSON files in repo
 
-## Current Snapshot (2026-03-21)
+## Current Snapshot (2026-03-22)
 
-- `topic_cards.json`: **174 total cards**
+- `topic_cards.json`: **27 total cards**
 - `deck_groups`: **6** (`week-1` through `week-6`)
 - Weeks covered in the dataset: **1-6**
-- Exam-topic cards (`exam_stats.total_hits > 0`): **136**
+- Exam-topic cards (`exam_stats.total_hits > 0`): **18**
 - Duplicate normalized topic labels: **0**
-- Total key points across all cards: **935**
-- Optional key-point detail blocks: **256**
+- Total key points across all cards: **106**
+- Optional key-point detail blocks: **96**
 
 Curation state:
 

diff --git a/README.md b/README.md
@@ -66,6 +66,10 @@ python3 -m http.server 8000
 
 Then open [http://localhost:8000](http://localhost:8000).
 
+## Course Materials
+
+Official course files are still kept at their canonical paths under `materials/`, but there is now also a cleaner week-ordered view under [materials/by_week](materials/by_week) for easier browsing.
+
 ## Support This Project
 
 This project was made by just one student, and the AI coding tools used to build and improve it cost real money.

diff --git a/docs/curation/TOPIC_MERGING_GUIDELINES.md b/docs/curation/TOPIC_MERGING_GUIDELINES.md
@@ -14,14 +14,16 @@ Use this guide when you need to:
 
 ## Current Baseline
 
-At the time this guide was written:
+As of 2026-03-22, the merged deck baseline was:
 
-- `topic_cards.json` has **174** cards.
+- `topic_cards.json` has **27** merged cards.
 - `deck_groups` covers **6** weeks.
-- exam-topic cards (`exam_stats.total_hits > 0`) total **136**.
+- exam-topic cards (`exam_stats.total_hits > 0`) total **18**.
 - exact duplicate normalized topic labels are **0**.
 - exam-topic key points have optional detail coverage (examples/tables/explanations) and should stay selectable in UI.
 
+Treat `AGENTS.md` as the authoritative current snapshot for repo-wide counts. These numbers can drift as manual curation continues.
+
 Important: even with exact duplicates removed, semantic overlap can still exist.
 Important: curation should be evidence-driven; do not force fixed per-topic item counts.
 
@@ -63,13 +65,13 @@ Start with highest-impact cards (highest exam hits), then low-hit cards.
 
 Suggested review bundles:
 
-1. `For Loops`, `Range()`
-2. `Conditions`, `truthy_falsy`, `Boolean operators`, `comparison_operators`, `walrus_operator`
-3. `Functions`, `Return / None`, `Default arguments`, `*args`, `*args / **kwargs`
-4. `mutable_immutable`, `mutable args`, `mutable_default`, `Objects`, `Names`
-5. `Dictionaries`, `Sets`, `dict / average`
-6. `Indexing`, `Slicing`, `Strings`
-7. `Lambda`, `Enumerate`, `Zip`
+1. `Python Basics`, `Objects and Names`, `Sequences and Access`
+2. `Operators and Truth`, `Conditions`, `Conversion and Truthiness`
+3. `Functions and Imports`, `Defining and Calling Functions`, `Return Behavior`, `Scope`, `Arguments`, `Higher-Order Patterns`
+4. `Dictionaries and Mappings`, `Lists and Sets`, `Comprehensions`, `Generators and Iterators`
+5. `String Fundamentals`, `String Operations and Methods`, `String Formatting`
+6. `OOP Fundamentals`, `Error Handling`
+7. `Pandas Core Structures`, `Inspecting and Selecting Data`, `Working With Values`, `Combining Data`, `Datetime`
 
 These are semantic-review bundles, not mandatory merges.
 

diff --git a/docs/specs/RM-008-external-cheatsheet-gap-audit.md b/docs/specs/RM-008-external-cheatsheet-gap-audit.md
diff --git a/materials/README.md b/materials/README.md
@@ -0,0 +1,39 @@
+# Materials Layout
+
+This folder now has two layers:
+
+- the original canonical source paths used by the data pipeline and live dataset
+- a non-breaking organized index under `materials/by_week/`
+
+## Canonical Source Paths
+
+The canonical files stay where they were so existing references in `data/study_db.json`, `topic_cards.json`, scripts, and tests do not break.
+
+Examples:
+
+- `materials/lectures/`
+- `materials/notebooks/`
+- `materials/post_midterm/`
+- `materials/exams/`
+
+## Organized Week View
+
+Use `materials/by_week/` when you want a cleaner human-facing overview of the official course files.
+
+- `week-01` through `week-06` group lecture, notebook, exercise, solution, and helper files by week
+- `shared-assessments/` groups official exams and cross-week assessment material that does not belong to a single week
+
+These entries are symlinks that point back to the canonical originals.
+
-
+
+**How to use this folder**
+
+- For symlinks to work correctly, clone the repo with Git instead of downloading it as a ZIP:
+  - `git clone <repo-url>`
+- If you download the repository as a ZIP, some platforms (including GitHub’s ZIP export) may flatten or drop symlinks. In that case, the entries under `materials/by_week/` may appear as tiny plain-text files instead of behaving like links.
+- On Windows, symlink creation and use may require:
+  - enabling *Developer Mode* in Windows Settings, or
+  - running Git / your shell with the necessary permissions, or
+  - using WSL or Git Bash, which typically have better symlink support.
+- If `materials/by_week/` does not behave as expected, re-clone the repo with Git on a system/shell where symlinks are supported and enabled.
-
+
+**How to use this folder**
+
+- For symlinks to work correctly, clone the repo with Git instead of downloading it as a ZIP:
+  - `git clone <repo-url>`
+- If you download the repository as a ZIP, some platforms (including GitHub’s ZIP export) may flatten or drop symlinks. In that case, the entries under `materials/by_week/` may appear as tiny plain-text files instead of behaving like links.
+- On Windows, symlink creation and use may require:
+  - enabling *Developer Mode* in Windows Settings, or
+  - running Git / your shell with the necessary permissions, or
+  - using WSL or Git Bash, which typically have better symlink support.
+- If `materials/by_week/` does not behave as expected, re-clone the repo with Git on a system/shell where symlinks are supported and enabled.
+## How to Use This Folder
+
+- Clone the repo with Git when you want `materials/by_week/` to behave like a link index.
+- Avoid relying on ZIP downloads for this view. ZIP exports may flatten or drop symlinks, which can leave tiny plain-text files instead of working links.
+- On Windows, symlink support may require Developer Mode, an elevated shell, WSL, or a Git/shell setup with symlink support enabled.
+- If an entry under `materials/by_week/` opens as a short path string instead of the expected file, re-clone the repo with Git in an environment with symlink support.
+
+## Notes
+
+- Week 4-6 lecture decks also exist under `materials/lectures/`, but the organized view points to the `materials/post_midterm/` copies because those are the paths used by the live dataset.
+- `OOP.py` is grouped under `week-06` because the repo already classifies it as week 6 material.
+- External comparison PDFs stay in `materials/example_cheat_sheets/` and are not part of the official week index.
diff --git a/materials/by_week/shared-assessments/post-midterm/Sample Final plus answers.pdf b/materials/by_week/shared-assessments/post-midterm/Sample Final plus answers.pdf
@@ -0,0 +1 @@
+../../../post_midterm/Sample Final plus answers.pdf
diff --git a/materials/by_week/shared-assessments/pre-midterm/2023.pdf b/materials/by_week/shared-assessments/pre-midterm/2023.pdf
@@ -0,0 +1 @@
+../../../exams/2023.pdf
diff --git a/materials/by_week/shared-assessments/pre-midterm/2024.pdf b/materials/by_week/shared-assessments/pre-midterm/2024.pdf
@@ -0,0 +1 @@
+../../../exams/2024.pdf
diff --git a/materials/by_week/shared-assessments/pre-midterm/Midterm Extra Practice.txt b/materials/by_week/shared-assessments/pre-midterm/Midterm Extra Practice.txt
@@ -0,0 +1 @@
+../../../exams/Midterm Extra Practice.txt
diff --git a/materials/by_week/shared-assessments/pre-midterm/trial midterm.pdf b/materials/by_week/shared-assessments/pre-midterm/trial midterm.pdf
@@ -0,0 +1 @@
+../../../exams/trial midterm.pdf
diff --git a/...shared-assessments/previous-years/final-exam-solutions-for-python-programming-62oop21.pdf b/...shared-assessments/previous-years/final-exam-solutions-for-python-programming-62oop21.pdf
@@ -0,0 +1 @@
+../../../post_midterm/practice_exams_previous_years/final-exam-solutions-for-python-programming-62oop21.pdf
diff --git a/.../previous-years/final-exam-solutions-for-python-programming-course-code-308088-308234.pdf b/.../previous-years/final-exam-solutions-for-python-programming-course-code-308088-308234.pdf
@@ -0,0 +1 @@
+../../../post_midterm/practice_exams_previous_years/final-exam-solutions-for-python-programming-course-code-308088-308234.pdf
diff --git a/...eek/shared-assessments/previous-years/final-exam-study-guide-trial-python-basics-2023.pdf b/...eek/shared-assessments/previous-years/final-exam-study-guide-trial-python-basics-2023.pdf
@@ -0,0 +1 @@
+../../../post_midterm/practice_exams_previous_years/final-exam-study-guide-trial-python-basics-2023.pdf
diff --git a/...red-assessments/previous-years/introduction-to-python-trial-final-exam-solutions-py22.pdf b/...red-assessments/previous-years/introduction-to-python-trial-final-exam-solutions-py22.pdf
@@ -0,0 +1 @@
+../../../post_midterm/practice_exams_previous_years/introduction-to-python-trial-final-exam-solutions-py22.pdf
diff --git a/...ssments/previous-years/resit-exam-guidelines-for-intro-to-python-6013b0470y-july-2023.pdf b/...ssments/previous-years/resit-exam-guidelines-for-intro-to-python-6013b0470y-july-2023.pdf
@@ -0,0 +1 @@
+../../../post_midterm/practice_exams_previous_years/resit-exam-guidelines-for-intro-to-python-6013b0470y-july-2023.pdf
diff --git a/...shared-assessments/previous-years/resit-solutions-for-introduction-to-python-35761538.pdf b/...shared-assessments/previous-years/resit-solutions-for-introduction-to-python-35761538.pdf
@@ -0,0 +1 @@
+../../../post_midterm/practice_exams_previous_years/resit-solutions-for-introduction-to-python-35761538.pdf
diff --git a/...-assessments/previous-years/trial-final-exam-solutions-introduction-to-python-3077951.pdf b/...-assessments/previous-years/trial-final-exam-solutions-introduction-to-python-3077951.pdf
@@ -0,0 +1 @@
+../../../post_midterm/practice_exams_previous_years/trial-final-exam-solutions-introduction-to-python-3077951.pdf
diff --git a/materials/by_week/week-01/lectures/Lecture Week 1.md b/materials/by_week/week-01/lectures/Lecture Week 1.md
@@ -0,0 +1 @@
+../../../lectures/Lecture Week 1.md
diff --git a/materials/by_week/week-01/lectures/Lecture Week 1.pptx b/materials/by_week/week-01/lectures/Lecture Week 1.pptx
@@ -0,0 +1 @@
+../../../lectures/Lecture Week 1.pptx
diff --git a/materials/by_week/week-01/notebooks/Notebook Week 1.ipynb b/materials/by_week/week-01/notebooks/Notebook Week 1.ipynb
@@ -0,0 +1 @@
+../../../notebooks/Notebook Week 1.ipynb
diff --git a/materials/by_week/week-02/lectures/Lecture Week 2.md b/materials/by_week/week-02/lectures/Lecture Week 2.md
@@ -0,0 +1 @@
+../../../lectures/Lecture Week 2.md
diff --git a/materials/by_week/week-02/lectures/Lecture Week 2.pptx b/materials/by_week/week-02/lectures/Lecture Week 2.pptx
@@ -0,0 +1 @@
+../../../lectures/Lecture Week 2.pptx
diff --git a/materials/by_week/week-02/notebooks/Notebook Week 2.ipynb b/materials/by_week/week-02/notebooks/Notebook Week 2.ipynb
@@ -0,0 +1 @@
+../../../notebooks/Notebook Week 2.ipynb
diff --git a/materials/by_week/week-03/lectures/Lecture Week 3.md b/materials/by_week/week-03/lectures/Lecture Week 3.md
@@ -0,0 +1 @@
+../../../lectures/Lecture Week 3.md
diff --git a/materials/by_week/week-03/lectures/Lecture Week 3.pptx b/materials/by_week/week-03/lectures/Lecture Week 3.pptx
@@ -0,0 +1 @@
+../../../lectures/Lecture Week 3.pptx
diff --git a/materials/by_week/week-03/notebooks/Notebook Week 3.ipynb b/materials/by_week/week-03/notebooks/Notebook Week 3.ipynb
@@ -0,0 +1 @@
+../../../notebooks/Notebook Week 3.ipynb
diff --git a/materials/by_week/week-04/exercises/Exercise_4.1.py b/materials/by_week/week-04/exercises/Exercise_4.1.py
@@ -0,0 +1 @@
+../../../post_midterm/Exercise_4.1.py
diff --git a/materials/by_week/week-04/exercises/Exercise_4.2.py b/materials/by_week/week-04/exercises/Exercise_4.2.py
@@ -0,0 +1 @@
+../../../post_midterm/Exercise_4.2.py
diff --git a/materials/by_week/week-04/exercises/Exercise_4.3.py b/materials/by_week/week-04/exercises/Exercise_4.3.py
@@ -0,0 +1 @@
+../../../post_midterm/Exercise_4.3.py
diff --git a/materials/by_week/week-04/exercises/Exercise_4.4.py b/materials/by_week/week-04/exercises/Exercise_4.4.py
@@ -0,0 +1 @@
+../../../post_midterm/Exercise_4.4.py
diff --git a/materials/by_week/week-04/exercises/Exercise_4.5.py b/materials/by_week/week-04/exercises/Exercise_4.5.py
@@ -0,0 +1 @@
+../../../post_midterm/Exercise_4.5.py
diff --git a/materials/by_week/week-04/exercises/Exercise_4.6.py b/materials/by_week/week-04/exercises/Exercise_4.6.py
@@ -0,0 +1 @@
+../../../post_midterm/Exercise_4.6.py
diff --git a/materials/by_week/week-04/exercises/Exercise_4.7.py b/materials/by_week/week-04/exercises/Exercise_4.7.py
@@ -0,0 +1 @@
+../../../post_midterm/Exercise_4.7.py
diff --git a/materials/by_week/week-04/exercises/Exercise_4.8.py b/materials/by_week/week-04/exercises/Exercise_4.8.py
@@ -0,0 +1 @@
+../../../post_midterm/Exercise_4.8.py
diff --git a/materials/by_week/week-04/exercises/Exercise_4.9.py b/materials/by_week/week-04/exercises/Exercise_4.9.py
@@ -0,0 +1 @@
+../../../post_midterm/Exercise_4.9.py
diff --git a/materials/by_week/week-04/lectures/Lecture Week 4.pptx b/materials/by_week/week-04/lectures/Lecture Week 4.pptx
@@ -0,0 +1 @@
+../../../post_midterm/Lecture Week 4.pptx
diff --git a/materials/by_week/week-04/notebooks/Notebook Week 4.ipynb b/materials/by_week/week-04/notebooks/Notebook Week 4.ipynb
@@ -0,0 +1 @@
+../../../post_midterm/Notebook Week 4.ipynb
diff --git a/materials/by_week/week-04/solutions/Solutions week 4.txt b/materials/by_week/week-04/solutions/Solutions week 4.txt
@@ -0,0 +1 @@
+../../../post_midterm/Solutions week 4.txt
diff --git a/materials/by_week/week-05/exercises/Exercise_5.1.py b/materials/by_week/week-05/exercises/Exercise_5.1.py
@@ -0,0 +1 @@
+../../../post_midterm/Exercise_5.1.py
diff --git a/materials/by_week/week-05/exercises/Exercise_5.2.py b/materials/by_week/week-05/exercises/Exercise_5.2.py
@@ -0,0 +1 @@
+../../../post_midterm/Exercise_5.2.py
diff --git a/materials/by_week/week-05/exercises/Exercise_5.3.py b/materials/by_week/week-05/exercises/Exercise_5.3.py
@@ -0,0 +1 @@
+../../../post_midterm/Exercise_5.3.py
diff --git a/materials/by_week/week-05/exercises/Exercise_5.4.py b/materials/by_week/week-05/exercises/Exercise_5.4.py
@@ -0,0 +1 @@
+../../../post_midterm/Exercise_5.4.py
diff --git a/materials/by_week/week-05/exercises/Exercise_5.5.py b/materials/by_week/week-05/exercises/Exercise_5.5.py
@@ -0,0 +1 @@
+../../../post_midterm/Exercise_5.5.py
diff --git a/materials/by_week/week-05/exercises/Exercise_5.6.py b/materials/by_week/week-05/exercises/Exercise_5.6.py
@@ -0,0 +1 @@
+../../../post_midterm/Exercise_5.6.py
diff --git a/materials/by_week/week-05/exercises/Exercise_5.7.py b/materials/by_week/week-05/exercises/Exercise_5.7.py
@@ -0,0 +1 @@
+../../../post_midterm/Exercise_5.7.py
diff --git a/materials/by_week/week-05/exercises/Exercise_5.8.py b/materials/by_week/week-05/exercises/Exercise_5.8.py
@@ -0,0 +1 @@
+../../../post_midterm/Exercise_5.8.py
diff --git a/materials/by_week/week-05/exercises/Exercise_5.9.py b/materials/by_week/week-05/exercises/Exercise_5.9.py
@@ -0,0 +1 @@
+../../../post_midterm/Exercise_5.9.py
diff --git a/materials/by_week/week-05/lectures/Lecture Week 5.pptx b/materials/by_week/week-05/lectures/Lecture Week 5.pptx
@@ -0,0 +1 @@
+../../../post_midterm/Lecture Week 5.pptx
diff --git a/materials/by_week/week-05/notebooks/Notebook Week 5.ipynb b/materials/by_week/week-05/notebooks/Notebook Week 5.ipynb
@@ -0,0 +1 @@
+../../../post_midterm/Notebook Week 5.ipynb
diff --git a/materials/by_week/week-05/solutions/Solutions week 5.txt b/materials/by_week/week-05/solutions/Solutions week 5.txt
@@ -0,0 +1 @@
+../../../post_midterm/Solutions week 5.txt
diff --git a/materials/by_week/week-06/exercises/Exercise_6.1.py b/materials/by_week/week-06/exercises/Exercise_6.1.py
@@ -0,0 +1 @@
+../../../post_midterm/Exercise_6.1.py
diff --git a/materials/by_week/week-06/exercises/Exercise_6.2.py b/materials/by_week/week-06/exercises/Exercise_6.2.py
@@ -0,0 +1 @@
+../../../post_midterm/Exercise_6.2.py
diff --git a/materials/by_week/week-06/exercises/Exercise_6.3.py b/materials/by_week/week-06/exercises/Exercise_6.3.py
@@ -0,0 +1 @@
+../../../post_midterm/Exercise_6.3.py
diff --git a/materials/by_week/week-06/exercises/Exercise_6.4.py b/materials/by_week/week-06/exercises/Exercise_6.4.py
@@ -0,0 +1 @@
+../../../post_midterm/Exercise_6.4.py
diff --git a/materials/by_week/week-06/exercises/Exercise_6.5.py b/materials/by_week/week-06/exercises/Exercise_6.5.py
@@ -0,0 +1 @@
+../../../post_midterm/Exercise_6.5.py
diff --git a/materials/by_week/week-06/exercises/Exercise_6.6.py b/materials/by_week/week-06/exercises/Exercise_6.6.py
@@ -0,0 +1 @@
+../../../post_midterm/Exercise_6.6.py
diff --git a/materials/by_week/week-06/exercises/Exercise_6.7.py b/materials/by_week/week-06/exercises/Exercise_6.7.py
@@ -0,0 +1 @@
+../../../post_midterm/Exercise_6.7.py
diff --git a/materials/by_week/week-06/exercises/Exercise_6.8.py b/materials/by_week/week-06/exercises/Exercise_6.8.py
@@ -0,0 +1 @@
+../../../post_midterm/Exercise_6.8.py
diff --git a/materials/by_week/week-06/exercises/Exercise_6.9.py b/materials/by_week/week-06/exercises/Exercise_6.9.py
@@ -0,0 +1 @@
+../../../post_midterm/Exercise_6.9.py
diff --git a/materials/by_week/week-06/helpers/OOP.py b/materials/by_week/week-06/helpers/OOP.py
@@ -0,0 +1 @@
+../../../post_midterm/OOP.py
diff --git a/materials/by_week/week-06/lectures/Lecture Week 6.pptx b/materials/by_week/week-06/lectures/Lecture Week 6.pptx
@@ -0,0 +1 @@
+../../../post_midterm/Lecture Week 6.pptx
diff --git a/materials/by_week/week-06/notebooks/Notebook Week 6.ipynb b/materials/by_week/week-06/notebooks/Notebook Week 6.ipynb
@@ -0,0 +1 @@
+../../../post_midterm/Notebook Week 6.ipynb
-../../../post_midterm/Notebook Week 6.ipynb
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "This notebook entry was previously stored as a symbolic link to `../../../post_midterm/Notebook Week 6.ipynb`.\n",
+    "\n",
+    "On platforms or setups without symlink support, that approach results in an invalid `.ipynb` file containing only the target path.\n",
+    "\n",
+    "To make this repository robust across environments, the symlink has been replaced with a standalone (minimal) notebook file. If you need the full original content, open `post_midterm/Notebook Week 6.ipynb` directly."
+   ]
+  }
+ ],
+ "metadata": {
+  "language_info": {
+   "name": "python"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}
-../../../post_midterm/Notebook Week 6.ipynb
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "This notebook entry was previously stored as a symbolic link to `../../../post_midterm/Notebook Week 6.ipynb`.\n",
+    "\n",
+    "On platforms or setups without symlink support, that approach results in an invalid `.ipynb` file containing only the target path.\n",
+    "\n",
+    "To make this repository robust across environments, the symlink has been replaced with a standalone (minimal) notebook file. If you need the full original content, open `post_midterm/Notebook Week 6.ipynb` directly."
+   ]
+  }
+ ],
+ "metadata": {
+  "language_info": {
+   "name": "python"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}
diff --git a/tests/test_materials_by_week_symlinks.py b/tests/test_materials_by_week_symlinks.py
@@ -0,0 +1,30 @@
+from pathlib import Path
+import os
+import unittest
+
+
+class MaterialsByWeekSymlinkTests(unittest.TestCase):
+    @classmethod
+    def setUpClass(cls) -> None:
+        cls.root = Path(__file__).resolve().parents[1]
+        cls.by_week = cls.root / "materials" / "by_week"
+
+    def test_by_week_leaf_entries_are_symlinks_with_existing_targets(self) -> None:
+        entries = []
+        for path in self.by_week.rglob("*"):
+            if path.name.startswith("."):
+                continue
+            if path.is_dir() and not path.is_symlink():
+                continue
+            entries.append(path)
+
+        self.assertGreater(len(entries), 0, "Expected materials/by_week to contain linked material entries")
+
+        for entry in entries:
+            self.assertTrue(entry.is_symlink(), f"{entry}: expected by_week entry to be a symlink")
+            target = (entry.parent / os.readlink(entry)).resolve()
+            self.assertTrue(target.exists(), f"{entry}: symlink target does not exist: {target}")
+
+
+if __name__ == "__main__":
+    unittest.main()
diff --git a/tmp/pdfs/assessments/Sample Final plus answers-01.png b/tmp/pdfs/assessments/Sample Final plus answers-01.png
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