Agent skill

Typescript Patterns

TypeScript best practices and patterns. An agent skill from cohen-liel/hivemind.

Apache-2.0Auto-check passed

Install Typescript Patterns

skills CLI

$ npx skills add cohen-liel/hivemind --skill typescript-patterns -a claude-code

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

GitHub CLI

$ gh skill install cohen-liel/hivemind typescript-patterns --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/cohen-liel/hivemind.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/typescript-patterns .claude/skills/typescript-patterns && 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-patterns" agent skill from https://github.com/cohen-liel/hivemind/tree/main/.claude/skills/typescript-patterns into .claude/skills/typescript-patterns/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "typescript-patterns", 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/cohen-liel/hivemind/tree/main/.claude/skills/typescript-patterns

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 cohen-liel/hivemind --skill typescript-patterns -a codex

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

GitHub CLI

$ gh skill install cohen-liel/hivemind typescript-patterns --agent codex

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

Manual copy

$ git clone --depth 1 https://github.com/cohen-liel/hivemind.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.claude/skills/typescript-patterns .agents/skills/typescript-patterns && 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-patterns" agent skill from https://github.com/cohen-liel/hivemind/tree/main/.claude/skills/typescript-patterns into .agents/skills/typescript-patterns/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "typescript-patterns", 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 cohen-liel/hivemind --skill typescript-patterns -a cursor

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

GitHub CLI

$ gh skill install cohen-liel/hivemind typescript-patterns --agent cursor

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

Manual copy

$ git clone --depth 1 https://github.com/cohen-liel/hivemind.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.claude/skills/typescript-patterns .cursor/skills/typescript-patterns && 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-patterns" agent skill from https://github.com/cohen-liel/hivemind/tree/main/.claude/skills/typescript-patterns into .cursor/skills/typescript-patterns/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "typescript-patterns", 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/cohen-liel/hivemind.git --path .claude/skills/typescript-patterns

--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 cohen-liel/hivemind --skill typescript-patterns -a gemini-cli

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

GitHub CLI

$ gh skill install cohen-liel/hivemind typescript-patterns --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/cohen-liel/hivemind.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.claude/skills/typescript-patterns .gemini/skills/typescript-patterns && 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-patterns" agent skill from https://github.com/cohen-liel/hivemind/tree/main/.claude/skills/typescript-patterns into .gemini/skills/typescript-patterns/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "typescript-patterns", 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 cohen-liel/hivemind typescript-patterns

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 cohen-liel/hivemind --skill typescript-patterns -a github-copilot

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

Manual copy

$ git clone --depth 1 https://github.com/cohen-liel/hivemind.git skills-src && mkdir -p .github/skills && cp -r skills-src/.claude/skills/typescript-patterns .github/skills/typescript-patterns && 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-patterns" agent skill from https://github.com/cohen-liel/hivemind/tree/main/.claude/skills/typescript-patterns into .github/skills/typescript-patterns/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "typescript-patterns", 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 cohen-liel/hivemind --skill typescript-patterns -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 cohen-liel/hivemind typescript-patterns --agent opencode

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

Manual copy

$ git clone --depth 1 https://github.com/cohen-liel/hivemind.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.claude/skills/typescript-patterns .opencode/skills/typescript-patterns && 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-patterns" agent skill from https://github.com/cohen-liel/hivemind/tree/main/.claude/skills/typescript-patterns into .opencode/skills/typescript-patterns/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "typescript-patterns", 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-patterns
GitHub stars: 110
Token cost: ~807 tokens
SKILL.md length: 99 words
Files: 1
Skills in repo: 33
Repo updated: Apr 18, 2026
First seen: Oct 7, 2026
Licence: Apache-2.0

At a glance

TypeScript best practices and patterns. An agent skill from cohen-liel/hivemind.

Writing TypeScript code
SKILL.md covers Strict Config (tsconfig.json), Type Patterns and Rules
Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
Working with generics

What it does

Typescript Patterns is an agent skill from cohen-liel/hivemind. TypeScript best practices and patterns. Use when writing TypeScript code, defining types, working with generics, or converting JavaScript to TypeScript.

Its SKILL.md is about 810 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It works with TypeScript and JavaScript. The repository describes itself as: One prompt. A full AI engineering team. Go lie on the couch. 🧠. The licence is Apache-2.0.

When your agent uses it

Writing TypeScript code
Working with generics
Converting JavaScript to TypeScript

Example prompts

“/typescript-patterns”

What it can do on your machine

Read from SKILL.md and the folder at commit 918dd9b. 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 and json).
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 Patterns loads about 807 tokens when it runs. Until then it costs about 43 tokens; SKILL.md has 99 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~43
When it runs · the whole SKILL.md, loaded when a task matches: ~807

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 cohen-liel/hivemind at commit 918dd9b, republished under its Apache-2.0 licence (© cohen-liel). 99 words, ~807 tokens.

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

name: typescript-patterns
description: TypeScript best practices and patterns. Use when writing TypeScript code, defining types, working with generics, or converting JavaScript to TypeScript.

TypeScript Patterns

Strict Config (tsconfig.json)

json

{
  "compilerOptions": {
    "strict": true,
    "noUncheckedIndexedAccess": true,
    "noImplicitReturns": true,
    "exactOptionalPropertyTypes": true,
    "target": "ES2022",
    "module": "ESNext",
    "moduleResolution": "bundler",
    "baseUrl": ".",
    "paths": { "@/*": ["src/*"] }
  }
}

Type Patterns

Discriminated Union (never use string + optional fields)

typescript

// BAD
type ApiResponse = { success: boolean; data?: User; error?: string }

// GOOD
type ApiResponse =
  | { success: true; data: User }
  | { success: false; error: string }

function handle(res: ApiResponse) {
  if (res.success) {
    console.log(res.data.email)  // TypeScript knows data exists
  } else {
    console.error(res.error)     // TypeScript knows error exists
  }
}

Generic Repository

typescript

interface Repository<T, ID> {
  findById(id: ID): Promise<T | null>
  findAll(): Promise<T[]>
  create(data: Omit<T, 'id' | 'createdAt'>): Promise<T>
  update(id: ID, data: Partial<T>): Promise<T>
  delete(id: ID): Promise<void>
}

Branded Types (prevent mixing IDs)

typescript

type UserId = number & { readonly _brand: 'UserId' }
type PostId = number & { readonly _brand: 'PostId' }

const userId = 123 as UserId
const postId = 456 as PostId

function getUser(id: UserId): Promise<User> { ... }
getUser(postId)  // TypeScript error! Can't pass PostId as UserId

Utility Types

typescript

// Pick only what you need
type UserSummary = Pick<User, 'id' | 'name' | 'email'>

// Make all optional for updates
type UserUpdate = Partial<Pick<User, 'name' | 'email'>>

// Require specific fields
type UserCreate = Required<Pick<User, 'email' | 'password'>> & Partial<Pick<User, 'name'>>

// Readonly for immutable data
type Config = Readonly<{ apiUrl: string; timeout: number }>

// Record for maps
const rolePermissions: Record<UserRole, Permission[]> = { ... }

Result Type (instead of throwing everywhere)

typescript

type Result<T, E = Error> =
  | { ok: true; value: T }
  | { ok: false; error: E }

async function safeParseJson<T>(text: string): Promise<Result<T>> {
  try {
    return { ok: true, value: JSON.parse(text) as T }
  } catch (e) {
    return { ok: false, error: e as Error }
  }
}

Type Guards

typescript

function isUser(obj: unknown): obj is User {
  return typeof obj === 'object' && obj !== null &&
    'id' in obj && 'email' in obj && typeof (obj as User).email === 'string'
}

Rules

Enable strict: true — never disable it for individual files
Never use any — use unknown and narrow with type guards
Prefer interface for object shapes, type for unions/intersections
Use discriminated unions over optional fields
Type return values of exported functions explicitly
Use as const for literal arrays/objects that shouldn't be widened
Avoid type assertions (as X) — use type guards instead
Prefer readonly properties for data that shouldn't change

Files

Just SKILL.md in .claude/skills/typescript-patterns of cohen-liel/hivemind.

Open the folder on GitHubat commit 918dd9b

Compare with similar skills

Typescript Patterns 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 Patterns compared with similar skills
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Code Review ChecklistshareAI-lab/learn-claude-code	78k	5 repos	~1.1k	Automated safety check: Pass	MIT	10 days ago
Install Anti-Slop Oxlint Rulesdmmulroy/anti-slop	5.3k	1 repos	~2.2k	Automated safety check: Pass	MIT	28 days ago
Install Anti Sloptrycompai/crm	11k	1 repos	~881	Automated safety check: Pass	MIT	27 days ago
Bun DevelopmentGabrielMartinMoran/mind	148	12 repos	~3.5k	Automated safety check: Notes	MIT	8 days ago
Generate Release Notesteambit/bit	18k	—	~2.2k	Automated safety check: Pass	Custom licence	yesterday

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Questions about Typescript Patterns

What does Typescript Patterns do?

TypeScript best practices and patterns. An agent skill from cohen-liel/hivemind. Typescript Patterns is an agent skill from cohen-liel/hivemind. TypeScript best practices and patterns.

When should I use Typescript Patterns?

Typescript Patterns fits situations like: writing TypeScript code; working with generics; converting JavaScript to TypeScript.

How do I install Typescript Patterns in Claude Code?

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

How do I install Typescript Patterns in Codex?

Run `npx skills add cohen-liel/hivemind --skill typescript-patterns -a codex`. Or copy the skill folder (.claude/skills/typescript-patterns in cohen-liel/hivemind) into .agents/skills/typescript-patterns in your project. Codex loads it when a task matches its description.

Can I use Typescript Patterns 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 cohen-liel/hivemind --skill typescript-patterns -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-patterns, .gemini/skills/typescript-patterns, .github/skills/typescript-patterns and .opencode/skills/typescript-patterns in your project.

What does Typescript Patterns need to run?

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

Does Typescript Patterns 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 Patterns 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 Patterns use?

Typescript Patterns is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Typescript Patterns use?

About 807 tokens (SKILL.md is roughly 3.2k 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 Patterns?

Skills that share tags, products or a category with Typescript Patterns: Code Review Checklist (shareAI-lab/learn-claude-code, 78k stars), Install Anti-Slop Oxlint Rules (dmmulroy/anti-slop, 5.3k stars), Install Anti Slop (trycompai/crm, 11k stars) and Bun Development (GabrielMartinMoran/mind, 148 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Typescript Patterns?

cohen-liel (a GitHub user) maintains it in cohen-liel/hivemind, which has 110 GitHub stars. The repository holds 33 skills in this directory. The repository was last updated on April 18, 2026.

Source: cohen-liel/hivemind 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 Patterns

Facts

At a glance

What it does

When your agent uses it

Example prompts

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

TypeScript Patterns

Strict Config (tsconfig.json)

Type Patterns

Discriminated Union (never use string + optional fields)

Generic Repository

Branded Types (prevent mixing IDs)

Utility Types

Result Type (instead of throwing everywhere)

Type Guards

Rules

Files

Compare with similar skills

Similar skills

More from cohen-liel/hivemind

Related

Questions about Typescript Patterns