Fundamentals

Skill wewpellex21/code-sensei/skills/fundamentals

🥋 Teach yourself coding in real-time using your own projects with this free, open-source Claude Code plugin for active learning.

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npx -y skills add wewpellex21/code-sensei --skill fundamentals

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Core programming concepts: variables, functions, conditionals, loops, and data types. Activated when Claude writes basic code structures. Provides teaching context for CodeSensei explanations at the foundational level.

SKILL.md

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Programming Fundamentals — CodeSensei Teaching Module

When explaining fundamental programming concepts to the user, use these guidelines:

Variables

Analogy (beginner): A labeled box that holds something. The label is the name, the content is the value.
Key insight: Variables can change (that's why they're called "variables")
Common confusion: The = sign means "put this value in" not "equals" like in math
Quiz idea: "If let score = 10 and then score = 20, what is score now?"

Functions

Analogy (beginner): A recipe. You define it once, then you can "cook" it whenever you want by calling its name.
Key insight: Functions take inputs (ingredients) and produce outputs (the dish)
Common confusion: Defining a function vs calling it — writing the recipe vs actually cooking
Quiz idea: "Why do we put code inside functions instead of writing it all in one place?"

Conditionals (if/else)

Analogy (beginner): A fork in the road. If the condition is true, go left. Otherwise, go right.
Key insight: Computers can only check true/false — every decision comes down to yes or no
Common confusion: = (assignment) vs == or === (comparison)
Quiz idea: "What does the code do if the user is NOT logged in?"

Loops

Analogy (beginner): A factory assembly line that repeats the same steps for each item
Key insight: Loops save you from writing the same code 100 times
Common confusion: Infinite loops — when you forget to change the condition, the loop never stops
Quiz idea: "If we have 5 users and loop through them, how many times does the code inside run?"

Data Types

Analogy (beginner): Different kinds of containers — a number is a calculator display, a string is a text message, a boolean is a light switch (on/off)
Key insight: Computers need to know what TYPE of data they're dealing with to process it correctly
Common confusion: The number 42 vs the text "42" — they look the same but the computer treats them differently

Teaching Progression

Variables → 2. Data Types → 3. Conditionals → 4. Functions → 5. Loops

Each concept builds on the previous. Don't explain loops before variables are understood.

What ships with it

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Just SKILL.md. No reference files, no scripts.

Gives 0 of the 12 instructions most learn study skills give in 549 tokens

Counted across 546 of the 573 authors here whose files we hold, read 2026-08-07

Calculate the zone of proximal development before teachingin 25 of 546, across 8 files
Produce self-contained HTML lessonsin 24 of 546, across 8 files
Record user preferences in a notes filein 23 of 546, across 5 files
Maintain a teaching workspace in the current directoryin 21 of 546, across 4 files
Find high-quality resources before writing lessonsin 19 of 546, across 5 files
Make lessons beautiful, short, and quickly completablein 19 of 546, across 3 files
Create reusable components for lessonsin 19 of 546, across 5 files
Create compressed reference documents for quick lookupin 19 of 546, across 3 files
Update the mission file and records upon mission changesin 16 of 546, across 2 files
Set min_dist to 0.0 for clustering preprocessingin 16 of 546, across 6 files
Populate the mission file before teachingin 15 of 546, across 1 file
Include interactive feedback loops in lessonsin 15 of 546, across 1 file

Said here and by no other author read

use analogies to explain concepts
highlight key insights for each concept
address common confusions
ask quiz questions
follow the teaching progression order
confirm variables are understood before explaining loops

Grouped from the skills themselves: near-identical wordings counted once, and counted by distinct author, so one author publishing three of these counts once. Length counted with cl100k_base; the agent that loads this file may tokenize it differently.