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Agent skill

Typescript Best Practices

by HoangNguyen0403 in HoangNguyen0403/agent-skills-standard

Write idiomatic TypeScript patterns for clean, maintainable code.

MITAuto-check passedDevelopment

Install Typescript Best Practices

skills CLI
$ npx skills add HoangNguyen0403/agent-skills-standard --skill typescript-best-practices -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install HoangNguyen0403/agent-skills-standard typescript-best-practices --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/HoangNguyen0403/agent-skills-standard.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/typescript/typescript-best-practices .claude/skills/typescript-best-practices && rm -rf skills-src

Use ~/.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/

Facts

Skill name
typescript-best-practices
GitHub stars
572
Token cost
~659 tokens
SKILL.md length
242 words
Files
4 (incl. references)
Skills in repo
211
Repo updated
First seen
Licence
MIT

At a glance

Write idiomatic TypeScript patterns for clean, maintainable code.

  • Refactoring TypeScript classes
  • SKILL.md covers Priority: P1 (HIGH), Implementation Guidelines, Anti-Patterns and References, plus 1 more section
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
  • Tasks that involve Refactoring

What it does

Typescript Best Practices is an agent skill from HoangNguyen0403/agent-skills-standard. Write idiomatic TypeScript patterns for clean, maintainable code. Use when writing or refactoring TypeScript classes, functions, modules, or async logic.

Its SKILL.md is about 660 tokens, which your agent loads only when the skill is triggered. The skill folder holds 5 other files, including reference files (for example `evals/evals.json`, `references/REFERENCE.md` and `references/examples.md`).

It sits in Development, covering Refactoring. It works with TypeScript. The repository describes itself as: A collection of Agent Skills Standard and Best Practice for Programming Languages, Frameworks that help our AI Agent follow best practies on frameworks and programming laguages. The licence is MIT.

When your agent uses it

  • Refactoring TypeScript classes
  • Tasks that involve Refactoring

Example prompts

  • “/typescript-best-practices”

What it can do on your machine

Read from SKILL.md and the folder at commit b529c2d. 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

    No URLs in SKILL.md.

    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

Typescript Best Practices loads about 659 tokens when it runs, and up to ~1.4k if it reads all its reference files. Until then it costs about 45 tokens; SKILL.md has 242 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~45
When it runs · the whole SKILL.md, loaded when a task matches
~659
With references · SKILL.md plus every file in references/, read only if the agent opens them
~1.4k

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 HoangNguyen0403/agent-skills-standard at commit b529c2d, republished under its MIT licence (© HoangNguyen0403). 242 words, ~659 tokens.

Download SKILL.mdSave it as .claude/skills/typescript-best-practices/SKILL.md (or your agent's skills folder). This skill also uses 3 other files; get the full folder from GitHub.
name
typescript-best-practices
description
Write idiomatic TypeScript patterns for clean, maintainable code. Use when writing or refactoring TypeScript classes, functions, modules, or async logic.

TypeScript Best Practices

Priority: P1 (HIGH)

Implementation Guidelines

  • Naming: Use PascalCase for Classes/Types/Interfaces, camelCase for variables/functions, and UPPER_SNAKE for static constants.
  • Functions: Use arrow functions for callbacks/logic; function declaration for top-level exports. Always type public API returns.
  • Modules: Use Named exports ONLY to enable better refactoring/auto-imports.
  • Async: Use async/await with Promise.all() for parallel execution. Implement try-catch for error handling; type catch(e) as unknown and narrow before use. Avoid .then().catch() chains.
  • Classes: Explicitly use private, protected, and public modifiers. Favor composition over inheritance and dependency injection with constructor injection and interfaces over singletons for testability.
  • Type Safety: Use never for exhaustiveness checks in switch-cases.
  • Optional: Use optional chaining (?.) and nullish coalescing (??) over manual checks.
  • Imports: Enforce external packages → internal modules → relative imports order automatically via eslint-plugin-import. Use import type for interfaces/types to ensure better tree-shaking and zero runtime overhead.
  • Validation: Use Zod or Tsoa for runtime boundary validation.

Anti-Patterns

  • No Default Exports: Use named exports.
  • No Implicit Returns: Specify return types.
  • No Unused Variables: Enable noUnusedLocals.
  • No require: Use ES6 import.
  • No Empty Interfaces: Use type or non-empty interface.
  • No any: Use unknown or specific type.
  • No Unsafe Mocks: Cast with jest.Mocked<T> or as unknown as T.
  • No eslint-disable: Fix root cause; never suppress warnings.

References

See references/examples.md for Immutable Interfaces, Exhaustiveness Checking, Assertion Functions, DI Patterns, and Import Organization.

Canonical response anchors

When this skill applies, preserve the following domain terminology or equivalent concrete examples in the answer when relevant:

  • async/await
  • injection

© HoangNguyen0403, 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 3 other files (references) in skills/typescript/typescript-best-practices of HoangNguyen0403/agent-skills-standard.

  • SKILL.md
  • evals/evals.json
  • references/REFERENCE.md
  • references/examples.md

Open the folder on GitHubat commit b529c2d

Compare with similar skills

Typescript 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.

Typescript Best Practices compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Typescript Best Practices this skillHoangNguyen0403/agent-skills-standard572—~659Automated safety check: PassMIT
Svelte5 Best PracticesSikandarJODD/cnblocks4311 repos~810Automated safety check: PassMIT
Dinero Best Practicesdinerojs/dinero.js6.8k—~756Automated safety check: PassMIT
Code Guidelinesgetsentry/sentry-react-native1.8k—~3.2kAutomated safety check: PassMIT
AST Visitor Pattern for Unionsprisma/orm48k—~830Automated safety check: PassApache-2.0
ast-grep Codemod Referencewarp-drive-data/warp-drive3.2k—~2.6kAutomated safety check: PassMIT

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Works with

Categories

Questions about Typescript Best Practices

What does Typescript Best Practices do?

Write idiomatic TypeScript patterns for clean, maintainable code. Typescript Best Practices is an agent skill from HoangNguyen0403/agent-skills-standard. Write idiomatic TypeScript patterns for clean, maintainable code.

When should I use Typescript Best Practices?

Typescript Best Practices fits situations like: refactoring TypeScript classes; tasks that involve Refactoring.

How do I install Typescript Best Practices in Claude Code?

Run `npx skills add HoangNguyen0403/agent-skills-standard --skill typescript-best-practices -a claude-code`. Or copy the skill folder (skills/typescript/typescript-best-practices in HoangNguyen0403/agent-skills-standard) into .claude/skills/typescript-best-practices in your project. Claude Code loads it when a task matches its description.

How do I install Typescript Best Practices in Codex?

Run `npx skills add HoangNguyen0403/agent-skills-standard --skill typescript-best-practices -a codex`. Or copy the skill folder (skills/typescript/typescript-best-practices in HoangNguyen0403/agent-skills-standard) into .agents/skills/typescript-best-practices in your project. Codex loads it when a task matches its description.

Can I use Typescript 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 HoangNguyen0403/agent-skills-standard --skill typescript-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/typescript-best-practices, .gemini/skills/typescript-best-practices, .github/skills/typescript-best-practices and .opencode/skills/typescript-best-practices in your project.

What does Typescript Best Practices need to run?

SKILL.md names no scripts, command-line tools or credentials: Typescript Best Practices is instructions for the agent only.

Does Typescript Best Practices access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Typescript 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 Typescript Best Practices use?

Typescript Best Practices is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Typescript Best Practices use?

About 659 tokens (SKILL.md is roughly 2.6k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 761 tokens, read only when the agent opens those files.

What are the alternatives to Typescript Best Practices?

Skills that share tags, products or a category with Typescript Best Practices: Svelte5 Best Practices (SikandarJODD/cnblocks, 431 stars), Dinero Best Practices (dinerojs/dinero.js, 6.8k stars), Code Guidelines (getsentry/sentry-react-native, 1.8k stars) and AST Visitor Pattern for Unions (prisma/orm, 48k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Typescript Best Practices?

HoangNguyen0403 (a GitHub user) maintains it in HoangNguyen0403/agent-skills-standard, which has 572 GitHub stars. The repository holds 211 skills in this directory. The repository was last updated on October 9, 2026.

Source: HoangNguyen0403/agent-skills-standard on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.