ast-grep Codemod Reference
warp-drive-data/warp-drive
Reference for writing and debugging TypeScript and JavaScript codemods with @ast-grep/napi: parsing, node queries, meta-variables, rule objects and editing.
Core best practices for the Dinero.js money library. An agent skill from dinerojs/dinero.js.
Install Dinero Best Practices
$ npx skills add dinerojs/dinero.js --skill dinero-best-practices -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install dinerojs/dinero.js dinero-best-practices --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/dinerojs/dinero.js.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/dinero-best-practices .claude/skills/dinero-best-practices && 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 "dinero-best-practices" agent skill from https://github.com/dinerojs/dinero.js/tree/main/.agents/skills/dinero-best-practices into .claude/skills/dinero-best-practices/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "dinero-best-practices", 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/dinerojs/dinero.js/tree/main/.agents/skills/dinero-best-practicesType 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 dinerojs/dinero.js --skill dinero-best-practices -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install dinerojs/dinero.js dinero-best-practices --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/dinerojs/dinero.js.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.agents/skills/dinero-best-practices .agents/skills/dinero-best-practices && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "dinero-best-practices" agent skill from https://github.com/dinerojs/dinero.js/tree/main/.agents/skills/dinero-best-practices into .agents/skills/dinero-best-practices/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "dinero-best-practices", 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 dinerojs/dinero.js --skill dinero-best-practices -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install dinerojs/dinero.js dinero-best-practices --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/dinerojs/dinero.js.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.agents/skills/dinero-best-practices .cursor/skills/dinero-best-practices && 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 "dinero-best-practices" agent skill from https://github.com/dinerojs/dinero.js/tree/main/.agents/skills/dinero-best-practices into .cursor/skills/dinero-best-practices/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "dinero-best-practices", 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/dinerojs/dinero.js.git --path .agents/skills/dinero-best-practices--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 dinerojs/dinero.js --skill dinero-best-practices -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install dinerojs/dinero.js dinero-best-practices --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/dinerojs/dinero.js.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.agents/skills/dinero-best-practices .gemini/skills/dinero-best-practices && 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 "dinero-best-practices" agent skill from https://github.com/dinerojs/dinero.js/tree/main/.agents/skills/dinero-best-practices into .gemini/skills/dinero-best-practices/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "dinero-best-practices", 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 dinerojs/dinero.js dinero-best-practicesInstalls 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 dinerojs/dinero.js --skill dinero-best-practices -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/dinerojs/dinero.js.git skills-src && mkdir -p .github/skills && cp -r skills-src/.agents/skills/dinero-best-practices .github/skills/dinero-best-practices && 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 "dinero-best-practices" agent skill from https://github.com/dinerojs/dinero.js/tree/main/.agents/skills/dinero-best-practices into .github/skills/dinero-best-practices/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "dinero-best-practices", 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 dinerojs/dinero.js --skill dinero-best-practices -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install dinerojs/dinero.js dinero-best-practices --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/dinerojs/dinero.js.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.agents/skills/dinero-best-practices .opencode/skills/dinero-best-practices && 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 "dinero-best-practices" agent skill from https://github.com/dinerojs/dinero.js/tree/main/.agents/skills/dinero-best-practices into .opencode/skills/dinero-best-practices/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "dinero-best-practices", 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
dinero-best-practices- GitHub stars
- 6.8k
- Token cost
- ~756 tokens
- SKILL.md length
- 263 words
- Files
- 13
- Skills in repo
- 4
- Repo updated
- First seen
- Licence
- MIT
At a glance
Core best practices for the Dinero.js money library. An agent skill from dinerojs/dinero.js.
- Works in 4 steps: Object Creation (CRITICAL) → Arithmetic (CRITICAL) → Precision (HIGH) → …
- Refactoring code that creates Dinero objects
- SKILL.md covers When to Apply, Rule Categories by Priority, Quick Reference and How to Use
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Dinero Best Practices is an agent skill from dinerojs/dinero.js. Core best practices for the Dinero.js money library. Use when writing, reviewing, or refactoring code that creates Dinero objects, performs arithmetic on monetary values, or handles money in JavaScript/TypeScript. Triggers on imports from 'dinero.js', monetary calculations, or price/cost handling logic.
Its SKILL.md is about 760 tokens, which your agent loads only when the skill is triggered. The skill folder holds 13 other files (for example `rules/arithmetic-allocate-not-divide.md`, `rules/arithmetic-immutability.md` and `rules/arithmetic-percentages.md`).
It sits in Development, covering Refactoring. It works with JavaScript and TypeScript. The repository describes itself as: Create, calculate, and format money in JavaScript and TypeScript. The licence is MIT.
When your agent uses it
- Refactoring code that creates Dinero objects
- Performs arithmetic on monetary values
- Handles money in JavaScript/TypeScript
- Imports from dinero.js
Example prompts
- “dinero.js”
- “/dinero-best-practices”
Workflow steps
4 steps, taken from the step headings in SKILL.md.
What it can do on your machine
Read from SKILL.md and the folder at commit 76b969e. 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
No scripts in the folder and no shell commands in SKILL.md.
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):
v2.dinerojs.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.
Context cost
Dinero Best Practices loads about 756 tokens when it runs. Until then it costs about 82 tokens; SKILL.md has 263 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); files beside SKILL.md are not scanned.
SKILL.md
The full file from dinerojs/dinero.js at commit 76b969e, republished under its MIT licence (© dinerojs). 263 words, ~756 tokens.
Download SKILL.mdSave it as
.claude/skills/dinero-best-practices/SKILL.md (or your agent's skills folder). This skill also uses 12 other files; get the full folder from GitHub.- name
- dinero-best-practices
- description
- Core best practices for the Dinero.js money library. Use when writing, reviewing, or refactoring code that creates Dinero objects, performs arithmetic on monetary values, or handles money in JavaScript/TypeScript. Triggers on imports from 'dinero.js', monetary calculations, or price/cost handling logic.
- license
- MIT
- metadata.author
- dinerojs
- metadata.version
- 1.0.0
Dinero.js Best Practices
Core rules for working with Dinero.js, the JavaScript/TypeScript library for creating, calculating, and formatting money safely. Contains rules across 4 categories, prioritized by impact.
When to Apply
Reference these guidelines when:
- Creating Dinero objects from user input, API responses, or database values
- Performing arithmetic on monetary values (adding, splitting, multiplying)
- Choosing between
numberandbigintcalculators - Importing from
dinero.js,dinero.js/currencies, ordinero.js/bigint - Working with prices, costs, taxes, or any financial calculation
Rule Categories by Priority
| Priority | Category | Impact | Prefix |
|---|---|---|---|
| 1 | Object Creation | CRITICAL | creation- |
| 2 | Arithmetic | CRITICAL | arithmetic- |
| 3 | Precision | HIGH | precision- |
| 4 | Imports | MEDIUM | imports- |
Quick Reference
1. Object Creation (CRITICAL)
creation-minor-units- Always pass amounts as integers in minor currency unitscreation-from-floats- Use a helper to convert float inputs to minor unitscreation-zero-exponent- Currencies with exponent 0 (e.g., JPY) take major units directly
2. Arithmetic (CRITICAL)
arithmetic-immutability- All operations return new objects; capture the return valuearithmetic-allocate-not-divide- Useallocatefor splitting money, not manual divisionarithmetic-scaled-amounts- Never multiply by a raw decimal; use scaled amountsarithmetic-percentages- Calculate percentages withallocateor scaledmultiply
3. Precision (HIGH)
precision-bigint- Usedinero.js/bigintfor amounts exceedingNumber.MAX_SAFE_INTEGERprecision-crypto- Cryptocurrencies require bigint due to high exponentsprecision-trim-scale- UsetrimScaleto remove trailing zeros after chained operations
4. Imports (MEDIUM)
imports-tree-shaking- Import only what you use; standalone functions enable tree-shakingimports-bigint-currencies- Match calculator type: usedinero.js/bigint/currencieswithdinero.js/bigint
How to Use
Read individual rule files for detailed explanations and code examples:
rules/creation-minor-units.md
rules/arithmetic-allocate-not-divide.mdEach rule file contains:
- Brief explanation of why it matters
- Incorrect code example with explanation
- Correct code example with explanation
- Additional context and references
© dinerojs, 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 12 other files in .agents/skills/dinero-best-practices of dinerojs/dinero.js.
- SKILL.md
- rules/arithmetic-allocate-not-divide.md
- rules/arithmetic-immutability.md
- rules/arithmetic-percentages.md
- rules/arithmetic-scaled-amounts.md
- rules/creation-from-floats.md
- rules/creation-minor-units.md
- rules/creation-zero-exponent.md
- rules/imports-bigint-currencies.md
- rules/imports-tree-shaking.md
- rules/precision-bigint.md
- rules/precision-crypto.md
- rules/precision-trim-scale.md
Open the folder on GitHubat commit 76b969e
Compare with similar skills
Dinero Best Practices 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 |
|---|---|---|---|---|---|---|
| Dinero Best Practices this skilldinerojs/dinero.js | 6.8k | — | ~756 | Automated safety check: Pass | MIT | |
| ast-grep Codemod Referencewarp-drive-data/warp-drive | 3.2k | — | ~2.6k | Automated safety check: Pass | MIT | |
| DRY Refactoring With jscpdkucherenko/jscpd | 6.4k | — | ~2.1k | Automated safety check: Pass | MIT | |
| Coding Agentmastra-ai/mastra | 29k | — | ~2.3k | Automated safety check: Pass | Custom licence | |
| jscpd Duplicate Code Detectorkucherenko/jscpd | 6.4k | — | ~4.5k | Automated safety check: Pass | MIT | |
| Crowdin API Clientcrowdin/crowdin-cli | 320 | — | ~1.1k | Automated safety check: Pass | MIT |
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Create a git commit with optional automatic Linear issue linking.
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Related
Works with
Categories
Questions about Dinero Best Practices
What does Dinero Best Practices do?
Core best practices for the Dinero.js money library. An agent skill from dinerojs/dinero.js. js.js money library.
When should I use Dinero Best Practices?
Dinero Best Practices fits situations like: refactoring code that creates Dinero objects; performs arithmetic on monetary values; handles money in JavaScript/TypeScript; imports from dinero.js.
How do I install Dinero Best Practices in Claude Code?
Run `npx skills add dinerojs/dinero.js --skill dinero-best-practices -a claude-code`. Or copy the skill folder (.agents/skills/dinero-best-practices in dinerojs/dinero.js) into .claude/skills/dinero-best-practices in your project. Claude Code loads it when a task matches its description.
How do I install Dinero Best Practices in Codex?
Run `npx skills add dinerojs/dinero.js --skill dinero-best-practices -a codex`. Or copy the skill folder (.agents/skills/dinero-best-practices in dinerojs/dinero.js) into .agents/skills/dinero-best-practices in your project. Codex loads it when a task matches its description.
Can I use Dinero Best Practices 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 dinerojs/dinero.js --skill dinero-best-practices -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/dinero-best-practices, .gemini/skills/dinero-best-practices, .github/skills/dinero-best-practices and .opencode/skills/dinero-best-practices in your project.
What does Dinero Best Practices need to run?
SKILL.md names no scripts, command-line tools or credentials: Dinero Best Practices is instructions for the agent only.
Does Dinero Best Practices access the network?
SKILL.md names 1 domain. As links in the text: v2.dinerojs.com. This is read from the text; nothing was executed.
Is Dinero Best Practices 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. Review the folder before installing.
What licence does Dinero Best Practices use?
Dinero Best Practices 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 Dinero Best Practices use?
About 756 tokens (SKILL.md is roughly 3k 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 Dinero Best Practices?
Skills that share tags, products or a category with Dinero Best Practices: ast-grep Codemod Reference (warp-drive-data/warp-drive, 3.2k stars), DRY Refactoring With jscpd (kucherenko/jscpd, 6.4k stars), Coding Agent (mastra-ai/mastra, 29k stars) and jscpd Duplicate Code Detector (kucherenko/jscpd, 6.4k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Dinero Best Practices?
dinerojs (a GitHub organization) maintains it in dinerojs/dinero.js, which has 6,804 GitHub stars. The repository holds 4 skills in this directory. The repository was last updated on October 5, 2026.
Source: dinerojs/dinero.js on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.