GitHub - hxii/sixwhyo: A six-year-old code reviewer who's not afraid to as "why?" about everything.

sixwhyo (6 y.o.)

Dad, is this function so long because it is Python?

sixwhyo asks "Why?" for you, the adult who is stuck in their fixed mindset, expected conventions and beliefs about how code should look and work.

sixwhyo tears down the over-engineered castles you've built for yourself for absolutely no reason just because that's either what you're used to, or someone told you to do it that way.

The inspiration for this was:

My own 6-year-old, Andy! ❤️
Ponytail

Skills

Skill	Description
`sixwhyo`	A six-year-old code reviewer who asks "why?" about everything. Catches over-engineering, confusing names, and unnecessary complexity.
`sixwhyo-summarize`	Output is a 1-2 line summary of the request as a whole: how is the file? Is the class nice? Is the function correct?
`sixwhyo-simplify`	Corrects the code through the lens of a 6-year-old, maintaining simplicity and readability.

Usage

Trigger	What happens
Say `6yo`	The kid turns on and stays on. Persists across responses until you say `stop` or `go to your room`.
`sixwhyo-simplify`	One-shot: reviews and rewrites the code, then exits.
`sixwhyo-summarize`	One-shot: produces a 1-2 line summary of the file, then exits.

Install

OpenCode

To install globally

mkdir -p ~/.config/opencode/skills/ && git clone https://github.com/hxii/sixwhyo.git ~/.config/opencode/skills/sixwhyo

To install in your project

mkdir -p .opencode/skills/ && git clone https://github.com/hxii/sixwhyo.git .opencode/skills/sixwhyo

Oh My Pi (omp)

Via omp

omp plugin install github:hxii/sixwhyo

Pi

Via pi

pi install git:github.com/hxii/sixwhyo

To install globally

mkdir -p ~/.agents/skills/sixwhyo && git clone https://github.com/hxii/sixwhyo.git ~/.agents/skills/sixwhyo

To install in your project

mkdir -p .agents/skills/sixwhyo && git clone https://github.com/hxii/sixwhyo.git .agents/skills/sixwhyo

Codex

Run

codex plugin marketplace add hxii/sixwhyo

Example

# calculator.py
from abc import ABC, abstractmethod

class Operation(ABC):
    @abstractmethod
    def execute(self, a: float, b: float) -> float:
        pass

class AdditionOperation(Operation):
    def execute(self, a: float, b: float) -> float:
        return a + b

class SubtractionOperation(Operation):
    def execute(self, a: float, b: float) -> float:
        return a - b

class MultiplicationOperation(Operation):
    def execute(self, a: float, b: float) -> float:
        return a * b

class DivisionOperation(Operation):
    def execute(self, a: float, b: float) -> float:
        if b == 0:
            raise ValueError("Cannot divide by zero")
        return a / b

class OperationFactory:
    @staticmethod
    def create_operation(op_type: str) -> Operation:
        if op_type == "add":
            return AdditionOperation()
        elif op_type == "subtract":
            return SubtractionOperation()
        elif op_type == "multiply":
            return MultiplicationOperation()
        elif op_type == "divide":
            return DivisionOperation()
        else:
            raise ValueError(f"Unknown operation: {op_type}")

class Calculator:
    def __init__(self):
        self.factory = OperationFactory()

    def calculate(self, op_type: str, a: float, b: float) -> float:
        operation = self.factory.create_operation(op_type)
        return operation.execute(a, b)

def main():
    calc = Calculator()
    result = calc.calculate("add", 5, 3)
    print(f"Result: {result}")

if __name__ == "__main__":
    main()

becomes

This file is too big and I'm confused.

**Why is it called test.py when it says calculator.py inside?**
The comment on line 1 says "calculator.py" but the file is test.py. That's like putting a "cat" label on a dog.

**Why so many classes for adding numbers?**
You have:
- One class to say "what an operation is" (Operation)
- Four classes for adding, subtracting, multiplying, dividing
- One class to make the operations (OperationFactory)
- One class to use the operations (Calculator)

That's 7 classes to do `a + b`. I can do that with just `a + b`.

**Why does the factory need to exist?**
The factory takes a string like "add" and returns an AdditionOperation. But why not just do the math right there? When I want to add 5 and 3, I don't need to build a machine first.

**Why does Calculator need its own class?**
It just has one method that asks the factory for an operation and runs it. That's two lines of code, not a whole class.

**What's good:**
You did check for dividing by zero. That's smart because dividing by zero makes numbers explode.

**My question:**
Why can't this whole file just be:

```python
def calculate(op, a, b):
    if op == "add": return a + b
    if op == "subtract": return a - b
    if op == "multiply": return a * b
    if op == "divide":
        if b == 0: raise ValueError("Cannot divide by zero")
        return a / b
    raise ValueError(f"Unknown operation: {op}")
```

That's 8 lines instead of 56. Do we really need all those classes?

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