React Performance
affaan-m/ECC
React and Next.js performance optimization patterns adapted from Vercel Engineering's React Best Practices (https://github.com/vercel-labs/agent-skills).
Performs arbitrary-precision arithmetic calculations including addition, subtraction, multiplication, division, and exponents.
MITAuto-check passed
Install Calculator
$ npx skills add Code-and-Sorts/awesome-copilot-agents --skill calculator -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install Code-and-Sorts/awesome-copilot-agents calculator --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/Code-and-Sorts/awesome-copilot-agents.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/calculator .claude/skills/calculator && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "calculator" agent skill from https://github.com/Code-and-Sorts/awesome-copilot-agents/tree/main/skills/calculator into .claude/skills/calculator/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "calculator", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/Code-and-Sorts/awesome-copilot-agents/tree/main/skills/calculatorType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add Code-and-Sorts/awesome-copilot-agents --skill calculator -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install Code-and-Sorts/awesome-copilot-agents calculator --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Code-and-Sorts/awesome-copilot-agents.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/calculator .agents/skills/calculator && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "calculator" agent skill from https://github.com/Code-and-Sorts/awesome-copilot-agents/tree/main/skills/calculator into .agents/skills/calculator/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "calculator", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add Code-and-Sorts/awesome-copilot-agents --skill calculator -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install Code-and-Sorts/awesome-copilot-agents calculator --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Code-and-Sorts/awesome-copilot-agents.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/calculator .cursor/skills/calculator && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "calculator" agent skill from https://github.com/Code-and-Sorts/awesome-copilot-agents/tree/main/skills/calculator into .cursor/skills/calculator/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "calculator", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/Code-and-Sorts/awesome-copilot-agents.git --path skills/calculator--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add Code-and-Sorts/awesome-copilot-agents --skill calculator -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install Code-and-Sorts/awesome-copilot-agents calculator --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Code-and-Sorts/awesome-copilot-agents.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/calculator .gemini/skills/calculator && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "calculator" agent skill from https://github.com/Code-and-Sorts/awesome-copilot-agents/tree/main/skills/calculator into .gemini/skills/calculator/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "calculator", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install Code-and-Sorts/awesome-copilot-agents calculatorInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add Code-and-Sorts/awesome-copilot-agents --skill calculator -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/Code-and-Sorts/awesome-copilot-agents.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/calculator .github/skills/calculator && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "calculator" agent skill from https://github.com/Code-and-Sorts/awesome-copilot-agents/tree/main/skills/calculator into .github/skills/calculator/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "calculator", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add Code-and-Sorts/awesome-copilot-agents --skill calculator -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install Code-and-Sorts/awesome-copilot-agents calculator --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Code-and-Sorts/awesome-copilot-agents.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/calculator .opencode/skills/calculator && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "calculator" agent skill from https://github.com/Code-and-Sorts/awesome-copilot-agents/tree/main/skills/calculator into .opencode/skills/calculator/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "calculator", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
calculator- GitHub stars
- 579
- Used in
- 1 other repo
- Token cost
- ~470 tokens
- SKILL.md length
- 142 words
- Files
- 8 (incl. scripts)
- Skills in repo
- 4
- Repo updated
- First seen
- Licence
- MIT
At a glance
Performs arbitrary-precision arithmetic calculations including addition, subtraction, multiplication, division, and exponents.
- The user asks to calculate
- SKILL.md covers When to Use, Supported Operations, Usage and Examples, plus 2 more sections
- Runs TypeScript and JavaScript scripts from its folder; calls npm
- Evaluate math expressions
What it does
Calculator is an agent skill from Code-and-Sorts/awesome-copilot-agents. 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.
Its SKILL.md is about 470 tokens, which your agent loads only when the skill is triggered. The skill folder holds 9 other files, including scripts (for example `scripts/jest.config.js`, `scripts/package-lock.json` and `scripts/package.json`). Compatibility notes: Requires Node.js and npm
The repository describes itself as: ✨ A curated list of awesome GitHub instructions, prompt, skills, MCPs and agent markdown files for enhancing your GitHub Copilot AI experience. The licence is MIT.
When your agent uses it
- The user asks to calculate
- Evaluate math expressions
- Precise decimal arithmetic is needed to avoid floating-point errors
Example prompts
- “Use the calculator skill to perform arbitrary-precision arithmetic calculations including addition, subtraction, multiplication, division, and…”
- “/calculator”
Requirements
- Node.js
- Compatibility (from SKILL.md): Requires Node.js and npm
What it can do on your machine
Read from SKILL.md and the folder at commit a26d912. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Ships 7 files in scripts/ (TypeScript and JavaScript), which the agent can run.
Shell commands in SKILL.md call:
npm
From the folder's file list and the shell code blocks in SKILL.md.
Network
Links to these hosts (documentation or services it may open):
github.com
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Compatibility
Requires Node.js and npm
From compatibility in the SKILL.md frontmatter.
Context cost
Calculator loads about 470 tokens when it runs. Until then it costs about 73 tokens; SKILL.md has 142 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); the scripts in this folder are not scanned.
SKILL.md
The full file from Code-and-Sorts/awesome-copilot-agents at commit a26d912, republished under its MIT licence (© Code-and-Sorts). 142 words, ~470 tokens.
Download SKILL.mdSave it as
.claude/skills/calculator/SKILL.md (or your agent's skills folder). This skill also uses 7 other files; get the full folder from GitHub.- name
- calculator
- description
- 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.
- compatibility
- Requires Node.js and npm
- license
- MIT
- metadata.author
- Colby Timm
- metadata.version
- 1.0
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
© Code-and-Sorts, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
SKILL.md and 7 other files (scripts) in skills/calculator of Code-and-Sorts/awesome-copilot-agents.
- SKILL.md
- scripts/jest.config.js
- scripts/package-lock.json
- scripts/package.json
- scripts/src/calculator.test.ts
- scripts/src/calculator.ts
- scripts/src/run.ts
- scripts/tsconfig.json
Open the folder on GitHubat commit a26d912
Used in 1 other repository
We found 1 copy of this SKILL.md (exact, near-identical or edited) in other folders, from 1 other GitHub owner. This page covers the copy in Code-and-Sorts/awesome-copilot-agents, which our catalogue first saw on October 7, 2026.
Compare with similar skills
Calculator next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Calculator this skillCode-and-Sorts/awesome-copilot-agents | 579 | 1 repos | ~470 | Automated safety check: Pass | MIT | |
| React Performanceaffaan-m/ECC | 275k | 1 repos | ~4.5k | Automated safety check: Pass | MIT | |
| Performance Profileralirezarezvani/claude-skills | 28k | — | ~684 | Automated safety check: Pass | MIT | |
| Agent Performance Optimizerruvnet/ruflo | 74k | 2 repos | ~3.6k | Automated safety check: Pass | MIT | |
| Handsontable Performance Testinghandsontable/handsontable | 22k | — | ~3.4k | Automated safety check: Pass | Custom licence | |
| Performance Managementsickn33/agentic-awesome-skills | 47k | 1 repos | ~4.1k | Automated safety check: Pass | MIT |
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Performance Profiler
alirezarezvani/claude-skills
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Agent Performance Optimizer
ruvnet/ruflo
Agent skill for performance-optimizer - invoke with $agent-performance-optimizer
Handsontable Performance Testing
handsontable/handsontable
Guide to Handsontable's performance-tests package: Playwright scenarios measured through CDP traces and compared against golden baselines taken from the develop branch.
Performance Management
sickn33/agentic-awesome-skills
Performance review register: review type, period, employee and reviewer, KPI, OKR and behaviour scores, overall rating, PIP and promotion flags, development plan.
Performance
udecode/plate
Review performance lanes with GitHub-scale tactics not owned by Vercel React rules: cohort segmentation, repeated-unit budgets, interaction-level INP, memory tagging, degradation contracts, browser…
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Questions about Calculator
What does Calculator do?
Performs arbitrary-precision arithmetic calculations including addition, subtraction, multiplication, division, and exponents. Calculator is an agent skill from Code-and-Sorts/awesome-copilot-agents. Performs arbitrary-precision arithmetic calculations including addition, subtraction, multiplication, division, and exponents.
When should I use Calculator?
Calculator fits situations like: the user asks to calculate; evaluate math expressions; precise decimal arithmetic is needed to avoid floating-point errors.
How do I install Calculator in Claude Code?
Run `npx skills add Code-and-Sorts/awesome-copilot-agents --skill calculator -a claude-code`. Or copy the skill folder (skills/calculator in Code-and-Sorts/awesome-copilot-agents) into .claude/skills/calculator in your project. Claude Code loads it when a task matches its description.
How do I install Calculator in Codex?
Run `npx skills add Code-and-Sorts/awesome-copilot-agents --skill calculator -a codex`. Or copy the skill folder (skills/calculator in Code-and-Sorts/awesome-copilot-agents) into .agents/skills/calculator in your project. Codex loads it when a task matches its description.
Can I use Calculator in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add Code-and-Sorts/awesome-copilot-agents --skill calculator -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/calculator, .gemini/skills/calculator, .github/skills/calculator and .opencode/skills/calculator in your project.
What does Calculator need to run?
Going by SKILL.md and its folder, Calculator needs TypeScript and JavaScript for the scripts in its folder and the command-line tools its instructions call (npm). Our summary lists: Node.js. Compatibility (from SKILL.md): Requires Node.js and npm.
Does Calculator access the network?
SKILL.md names 1 domain. As links in the text: github.com. This is read from the text; nothing was executed.
Is Calculator safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. The check reads SKILL.md only: the scripts in the folder are not scanned, so read them before running anything.
What licence does Calculator use?
Calculator is published under the MIT licence (declared in SKILL.md). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Calculator use?
About 470 tokens (SKILL.md is roughly 1.9k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Calculator?
Skills that share tags, products or a category with Calculator: React Performance (affaan-m/ECC, 275k stars), Performance Profiler (alirezarezvani/claude-skills, 28k stars), Agent Performance Optimizer (ruvnet/ruflo, 74k stars) and Handsontable Performance Testing (handsontable/handsontable, 22k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Calculator?
Code-and-Sorts (a GitHub organization) maintains it in Code-and-Sorts/awesome-copilot-agents, which has 579 GitHub stars. The repository holds 4 skills in this directory. The repository was last updated on April 29, 2026.
Source: Code-and-Sorts/awesome-copilot-agents on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.