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.
Install
$ agentstack add skill-code-and-sorts-awesome-copilot-agents-calculator ✓ scanned · ✓ verified, works with Claude Code, Cursor, and more.
Security review
✓ PassedNo issues found. Passed automated security review. · v0.1.0 How review works →
- ✓ Prompt-injection patterns
- ✓ Secret / credential exfiltration
- ✓ Dangerous shell & filesystem operations
- ✓ Untrusted network calls
- ✓ Known-malicious package signatures
What it can access
- ✓ Network access No
- ✓ Filesystem access No
- ✓ Shell / process execution No
- ✓ Environment & secrets No
- ✓ Dynamic code execution No
From automated source analysis of v0.1.0. “Used” means the capability is present in the source — more access means more to trust, not that it’s unsafe.
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Passed review? Show it. Paste this badge into your README, it links to the public security report.
Links to your public security report.[](https://agentstack.voostack.com/security/report/skill-code-and-sorts-awesome-copilot-agents-calculator) Reliability & compatibility
Declared compatibility
Compatibility is declared by the source manifest. End-to-end runtime verification is coming, see below.
We're building live execution health for every listing: tool-call success rate, median latency, uptime, and last-checked timestamps, measured, not self-reported. It isn't live yet, so we don't show numbers we can't stand behind.
How agent discovery & health will work →About
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 ""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
Source & license
This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.
- Author: Code-and-Sorts
- Source: Code-and-Sorts/awesome-copilot-agents
- License: CC0-1.0
Install and usage instructions live in the source repository linked above.
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Versions
- v0.1.0 Imported from the upstream source.