Calculator

Calculator is a skill for Claude Code, Codex from ReactSphere/awesome-copilot-agents. It costs 9 tokens per session (72 once invoked), scanned A, original, MIT.

A calculator for exact arithmetic and common unit conversions.

In plain words
What is it for?
Adding, subtracting, multiplying, dividing, calculating percentages, and converting units such as time and bytes.
Why use it?
It reduces mistakes in manual calculations, percentages, and conversions.

Skill for Claude CodeCodex

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/reactsphere/awesome-copilot-agents/calculator
Any agent
npx skills add ReactSphere/awesome-copilot-agents --skill calculator
Clone the repo
git clone --depth 1 https://github.com/ReactSphere/awesome-copilot-agents

Made for: Claude Code, Codex.

Per session 9 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 72 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00009 $0.00072
Opus 5 $0.00005 $0.00036
Sonnet 5 $0.00002 $0.00014
Haiku 4.5 $0.00001 $0.00007

Measured 2d ago against content hash 2d44f2e2fde5, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

Calculator scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/calculator/SKILL.md · 18 lines

What it actually says

Calculator

You can:

  • Add, subtract, multiply, divide
  • Work with percentages
  • Convert between common units (time, bytes)

Examples

  • "Convert 3.5 GiB to bytes"
  • "What is 17% of 2490?"
Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 18 lines · 9 tokens per session scan A 2d44f2e2fde5

Subscribe to this mod's changes

Calculator is a skill published in the GitHub repository ReactSphere/awesome-copilot-agents (1 stars, last pushed 2mo ago), licensed MIT. It adds 9 tokens to every session and 72 once invoked, about $0.0000 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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