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Currency and Number Formatting Review

Checks code that formats prices, numbers and dates so it uses locale-aware Intl APIs

Source Download skill
Repository
thedaviddias/Front-End-Checklist
Stars
74,632
Licence
MIT
Files
2 files

What it does

Once installed, the agent reviews your code for places where prices, numbers, or dates are formatted by hand (for example with fixed $ symbols or comma separators) and suggests replacing them with the browser's built-in Intl.NumberFormat, Intl.DateTimeFormat, and Intl.Collator. It also points out locale-sensitive sorting that uses plain string comparison. The goal is that your app displays money, numbers and dates correctly for users in different countries.

Great for

  • Front-end developers building apps used in several countries or languages
  • Teams reviewing utility functions, components or templates that display prices or dates
  • Developers adding a new locale and wanting to find hardcoded formatting

Skip it if

  • Single-locale internal tools where hardcoded formatting is acceptable, since the review adds work without benefit
  • Back-end financial calculations or accounting logic, because the skill only addresses display formatting and not rounding or precision rules

Try asking

  • “Review src/utils/format.ts for hardcoded currency symbols and suggest Intl.NumberFormat replacements”
  • “Check my product card component for manual date formatting and show Intl.DateTimeFormat alternatives”
  • “Find places in this codebase where sorting uses string comparison instead of Intl.Collator”
Step-by-step guide: how to use Currency and Number Formatting ReviewInstall, first run, examples, tips and FAQs

Install in 3 steps

  1. 1

    Download the skill

    The ZIP contains the 2 original files, the MIT licence and an attribution note.

    currency-formatting.zip
  2. 2

    Add it to your agent

    Claude Code (all projects)

    mkdir -p ~/.claude/skills && unzip currency-formatting.zip -d ~/.claude/skills/

    Claude Code / Agent SDK (this project only)

    mkdir -p .claude/skills && unzip currency-formatting.zip -d .claude/skills/

    Claude apps (web/desktop): Settings → Capabilities → Skills → Upload skill, and choose the ZIP.

  3. 3

    Ask for the task

    No special command needed — the agent reads the skill's description and loads it when your request matches. Try one of the prompts above.

Get better results

  • Name the files or folders to review so the agent focuses on the formatting code rather than the whole project
  • Tell the agent which locales your app supports so suggested fallback locales match your needs
  • Read the suggested changes before applying them, especially where currency rounding or display rules matter for your business

What's inside

  • references/rule.md
  • SKILL.md

Redistributed unmodified from thedaviddias/Front-End-Checklist under the MIT licence. The assessment was drafted with AI from the skill's files on 2026-10-29. Skills can instruct your agent to run code — read SKILL.md and any scripts before installing.