mcpbeat

Calculator

code-and-sorts/calculator

Performs arbitrary-precision arithmetic calculations including addition, subtraction, multiplication, division, and exponents. Use when the user asks to calculate, compute, or evaluate math expressions, or when precise decimal arithmetic is needed to avoid floating-point errors.

This is a copy. The original lives at christophacham/calculator.

42k tokens
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the whole folder, loaded on every use
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0
copies elsewhere
how many repositories repackaged it
554
stars on the repo
on the repository, not the skill itself

Install

one command, takes just this skill from the repository 
npx skills add https://github.com/Code-and-Sorts/awesome-copilot-agents --skill calculator

The instruction itself

7 sections, as written by the author

Calculator

Evaluate arithmetic expressions with arbitrary-precision decimal math using big.js.

When to Use

  • User asks to calculate or evaluate a math expression
  • Precise decimal arithmetic is needed (avoids floating-point errors like 0.1 + 0.2 = 0.30000000000000004)
  • Expressions involve parentheses, operator precedence, or exponents

Supported Operations

| Operator | Description | Precedence |

| -------- | ----------- | ---------- |

| + | Addition | 1 |

| - | Subtraction | 1 |

| * | Multiplication | 2 |

| / | Division | 2 |

| ^ | Exponent (right-associative) | 3 |

| () | Parentheses | Highest |

Usage

cd scripts
npm ci || npm install
npm run build
npm run calculate "<expression>"

Examples

| Input | Output |

| ----- | ------ |

| "3 + 2" | 5 |

| "10 / 4" | 2.5 |

| "2 ^ 10" | 1024 |

| "(2 + 3) * 4" | 20 |

| "1 + 4.5 * (3-6) / 5" | -1.7 |

| "-5 + 3" | -2 |

| "2 ^ 3 ^ 2" | 512 (right-associative: 2^9) |

Edge Cases

  • Empty expression: Throws "Empty expression" error
  • Mismatched parentheses: Throws "Mismatched parentheses" error
  • Division by zero: big.js throws an error
  • Exponent must be integer: big.js .pow() requires integer exponents

Limitations

  • No trigonometric functions (sin, cos, tan)
  • No variables or symbolic math
  • Exponents must be integers
  • No factorial, modulo, or bitwise operators

How to use it

Copy the folder

Take code-and-sorts/calculator from the repository into ~/.claude/skills for personal use, or into .claude/skills inside a project.

Check the name does not clash

The agent identifies a skill by the name field in its header. Two skills with the same name cannot sit side by side — one of them will be ignored.

Install what it needs

The instructions reference npm. Without those the skill loads but fails at the first command.