Agent skill

Typescript

Guide for implementing TypeScript in projects, including naming conventions, type definitions, and code style.

MITAuto-check passedDevelopment

Install Typescript

skills CLI

$ npx skills add MatrixAges/polywise --skill typescript -a claude-code

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

GitHub CLI

$ gh skill install MatrixAges/polywise typescript --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/MatrixAges/polywise.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.opencode/skills/typescript .claude/skills/typescript && 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/

Paste into Claude Code

Install the "typescript" agent skill from https://github.com/MatrixAges/polywise/tree/master/.opencode/skills/typescript into .claude/skills/typescript/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "typescript", 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

$skill-installer install https://github.com/MatrixAges/polywise/tree/master/.opencode/skills/typescript

Type 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.

skills CLI

$ npx skills add MatrixAges/polywise --skill typescript -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install MatrixAges/polywise typescript --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/MatrixAges/polywise.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.opencode/skills/typescript .agents/skills/typescript && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "typescript" agent skill from https://github.com/MatrixAges/polywise/tree/master/.opencode/skills/typescript into .agents/skills/typescript/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "typescript", 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.

skills CLI

$ npx skills add MatrixAges/polywise --skill typescript -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install MatrixAges/polywise typescript --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/MatrixAges/polywise.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.opencode/skills/typescript .cursor/skills/typescript && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "typescript" agent skill from https://github.com/MatrixAges/polywise/tree/master/.opencode/skills/typescript into .cursor/skills/typescript/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "typescript", 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

$ gemini skills install https://github.com/MatrixAges/polywise.git --path .opencode/skills/typescript

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add MatrixAges/polywise --skill typescript -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install MatrixAges/polywise typescript --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/MatrixAges/polywise.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.opencode/skills/typescript .gemini/skills/typescript && rm -rf skills-src

Use ~/.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/

Paste into Gemini CLI

Install the "typescript" agent skill from https://github.com/MatrixAges/polywise/tree/master/.opencode/skills/typescript into .gemini/skills/typescript/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "typescript", 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.

GitHub CLI

$ gh skill install MatrixAges/polywise typescript

Installs 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).

skills CLI

$ npx skills add MatrixAges/polywise --skill typescript -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/MatrixAges/polywise.git skills-src && mkdir -p .github/skills && cp -r skills-src/.opencode/skills/typescript .github/skills/typescript && rm -rf skills-src

Use ~/.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/

Paste into GitHub Copilot

Install the "typescript" agent skill from https://github.com/MatrixAges/polywise/tree/master/.opencode/skills/typescript into .github/skills/typescript/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "typescript", 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.

skills CLI

$ npx skills add MatrixAges/polywise --skill typescript -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install MatrixAges/polywise typescript --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/MatrixAges/polywise.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.opencode/skills/typescript .opencode/skills/typescript && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "typescript" agent skill from https://github.com/MatrixAges/polywise/tree/master/.opencode/skills/typescript into .opencode/skills/typescript/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "typescript", 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: typescript
GitHub stars: 662
Token cost: ~1.1k tokens
SKILL.md length: 429 words
Files: 1
Skills in repo: 11
Repo updated: Jun 11, 2026
First seen: Oct 7, 2026
Licence: MIT

At a glance

Guide for implementing TypeScript in projects, including naming conventions, type definitions, and code style.

Works in 4 steps: Naming Conventions → Type Definitions → Code Style → …
Tasks that involve Refactoring
SKILL.md covers 1. Naming Conventions, 2. Type Definitions, 3. Code Style and 4. Summary Checklist
Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Typescript is an agent skill from MatrixAges/polywise. Guide for implementing TypeScript in projects, including naming conventions, type definitions, and code style. Triggered when writing or refactoring TypeScript code.

Its SKILL.md is about 1.1k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Development, covering Refactoring. It works with TypeScript. The repository describes itself as: The open source agentic content system to make your contents alive. Self-hosted on any platform. ◑. The licence is MIT.

When your agent uses it

Tasks that involve Refactoring

Example prompts

“/typescript”

Workflow steps

4 steps, taken from the step headings in SKILL.md.

Naming Conventions
Type Definitions
Code Style
Summary Checklist

What it can do on your machine

Read from SKILL.md and the folder at commit f8d2320. 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 (its code samples are typescript).
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 loads about 1.1k tokens when it runs. Until then it costs about 44 tokens; SKILL.md has 429 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~44
When it runs · the whole SKILL.md, loaded when a task matches: ~1.1k

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 MatrixAges/polywise at commit f8d2320, republished under its MIT licence (© MatrixAges). 429 words, ~1,062 tokens.

Download SKILL.mdSave it as .claude/skills/typescript/SKILL.md (or your agent's skills folder).

name: typescript
description: Guide for implementing TypeScript in projects, including naming conventions, type definitions, and code style. Triggered when writing or refactoring TypeScript code.

TypeScript Development Guide

This skill provides mandatory specifications for writing TypeScript in this project to ensure consistency, type safety, and code cleanliness.

1. Naming Conventions

1.1 Variables and Functions

Variables: Use snake_case (e.g., theme_value, is_dev).
Functions: Use camelCase (e.g., getAntdTheme, setGlobalAnimation).
Internal Props Objects: Use props_* prefix (e.g., props_side_bar).

1.2 Classes and Types

Classes: Use PascalCase (e.g., GlobalModel, Settings).
Interfaces/Types: Use PascalCase. Interfaces preferably start with I (e.g., IProps, IPropsSidebar).
Enum-like Types: Use literal union types instead of enum where possible (e.g., type Theme = 'light' | 'dark' | 'system').

2. Type Definitions

2.1 File Organization

Global Types: Place in packages/app/types/ or packages/app/typings/.
Local Types: Use types.ts file in the component or module directory.
Props: Define an IProps interface for each component, typically in the component file or adjacent types.ts.

2.2 Best Practices

Explicit Types: Prefer providing explicit type annotations for function parameters and complex return value types.
Utility Types: Leverage TypeScript's utility types (Pick, Omit, Partial, Exclude) to reuse existing definitions.
Strict Types: Avoid any. If the type is truly unknown, use unknown and perform type casting (cast) when necessary.
Type Alias vs. Interface: Use interface for object structures (especially props), use type for unions, intersections, or base types.

3. Code Style

3.1 Imports and Exports

Named Exports: Utility functions and models prefer named exports.
Default Exports: For the main component or main class in a file, use default export.
Pure Type Imports: Use import type for importing types to maintain clear process boundaries and reduce bundle size.
Path Aliases: Use @/ to reference the src directory (e.g., import { Settings } from '@/models').

Show full SKILL.md (170 more words)Show less

3.2 Statements and Logic

Arrow Functions: Component definitions and small utility functions prefer arrow functions.
Destructuring: Use destructuring for props and objects to improve readability.
Conditional Logic: Use optional chaining (?.) and nullish coalescing (??) for safer property access.

3.3 Code Spacing and Blank Lines

Use blank lines to separate code with different execution styles or visual appearances. If two adjacent lines of code look stylistically different, a blank line must be added between them.

When to Add Blank Lines:

Between data fetching and return statements
Between variable calculation and usage
Between multiple consecutive operations (different independent steps)
Before early returns
Between different operation types (sync vs async, query vs mutation)
Before and after state changes

Recommended:

typescript

async getSnapshot(weight_threshold = 0.2) {
	const nodes = await this.query(sql.sql_get_snapshot_nodes(weight_threshold))
	const edges = await this.query(sql.sql_get_snapshot_edges(weight_threshold))

	return { nodes, edges }
}

async tick(threshold_override?: number) {
	const threshold = threshold_override ?? 0.5

	await this.exec(sql.sql_tick(threshold))
}

Avoid:

typescript

async getSnapshot(weight_threshold = 0.2) {
	const nodes = await this.query(sql.sql_get_snapshot_nodes(weight_threshold))
	const edges = await this.query(sql.sql_get_snapshot_edges(weight_threshold))
	return { nodes, edges }
}

4. Summary Checklist

Are variable names snake_case?
Are function names camelCase?
Are component props using IProps or IProps*?
Are pure type imports using import type?
Are local types placed in types.ts files?
Has any been avoided in favor of strict types or unknown?
Are blank lines used to separate different execution style code blocks?

Files

Just SKILL.md in .opencode/skills/typescript of MatrixAges/polywise.

Open the folder on GitHubat commit f8d2320

Compare with similar skills

Typescript 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 compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Typescript this skillMatrixAges/polywise	662	—	~1.1k	Automated safety check: Pass	MIT	3 mo ago
Svelte5 Best PracticesSikandarJODD/cnblocks	430	1 repos	~810	Automated safety check: Pass	MIT	3 mo ago
Dinero Best Practicesdinerojs/dinero.js	6.8k	—	~756	Automated safety check: Pass	MIT	yesterday
Code Guidelinesgetsentry/sentry-react-native	1.8k	—	~3.2k	Automated safety check: Pass	MIT	today
AST Visitor Pattern for Unionsprisma/orm	48k	—	~830	Automated safety check: Pass	Apache-2.0	yesterday
ast-grep Codemod Referencewarp-drive-data/warp-drive	3.2k	—	~2.6k	Automated safety check: Pass	MIT	today

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Questions about Typescript

What does Typescript do?

Guide for implementing TypeScript in projects, including naming conventions, type definitions, and code style. Typescript is an agent skill from MatrixAges/polywise. Guide for implementing TypeScript in projects, including naming conventions, type definitions, and code style.

When should I use Typescript?

Typescript fits situations like: tasks that involve Refactoring.

How do I install Typescript in Claude Code?

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

How do I install Typescript in Codex?

Run `npx skills add MatrixAges/polywise --skill typescript -a codex`. Or copy the skill folder (.opencode/skills/typescript in MatrixAges/polywise) into .agents/skills/typescript in your project. Codex loads it when a task matches its description.

Can I use Typescript 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 MatrixAges/polywise --skill typescript -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, .gemini/skills/typescript, .github/skills/typescript and .opencode/skills/typescript in your project.

What does Typescript need to run?

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

Does Typescript 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 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 use?

Typescript 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 use?

About 1.1k tokens (SKILL.md is roughly 4.2k 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 Typescript?

Skills that share tags, products or a category with Typescript: Svelte5 Best Practices (SikandarJODD/cnblocks, 430 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?

MatrixAges (a GitHub organization) maintains it in MatrixAges/polywise, which has 662 GitHub stars. The repository holds 11 skills in this directory. The repository was last updated on June 11, 2026.

Source: MatrixAges/polywise on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Install Typescript

Facts

At a glance

What it does

When your agent uses it

Example prompts

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

TypeScript Development Guide

1. Naming Conventions

1.1 Variables and Functions

1.2 Classes and Types

2. Type Definitions

2.1 File Organization

2.2 Best Practices

3. Code Style

3.1 Imports and Exports

3.2 Statements and Logic

3.3 Code Spacing and Blank Lines

4. Summary Checklist

Files

Compare with similar skills

Similar skills

More from MatrixAges/polywise

Related

Questions about Typescript