Currency and Number Formatting Review
Checks code that formats prices, numbers and dates so it uses locale-aware Intl APIs
- 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”
Install in 3 steps
- 1
Download the skill
The ZIP contains the 2 original files, the MIT licence and an attribution note.
currency-formatting.zip - 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
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.