linkedin-mcp-server-ts: Skill for Claude Code

.agents/skills/typescript-best-practices/SKILL.md

typescript-best-practices is a skill for Claude Code, Codex from joaovjo/linkedin-mcp-server-ts. It costs 30 tokens per session (1,404 once invoked), scanned A, original, MIT.

A set of guidelines for writing and reviewing TypeScript and JavaScript code. TypeScript is JavaScript with added checks that help describe data and catch mistakes before the program runs.

In plain words
What is it for?
It helps choose between interfaces and type aliases, model data with unions, prevent invalid states, and apply style rules to TypeScript, JavaScript, and configuration files.
Why use it?
It gives developers consistent rules for structuring types, representing valid program states, and following modern project conventions.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: installed under .agents/ (shared by several agents).

This is joaovjo/linkedin-mcp-server-ts's own configuration. It tells Claude Code and Codex how to work on linkedin-mcp-server-ts itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything linkedin-mcp-server-ts configures →

Reuse

Borrowing it

Nothing to install: this file belongs to joaovjo/linkedin-mcp-server-ts. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/joaovjo/linkedin-mcp-server-ts/main/.agents/skills/typescript-best-practices/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/joaovjo/linkedin-mcp-server-ts

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

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README.md
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Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

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Your own site · 80×15
<a href="https://agentmods.dev/skills/joaovjo/linkedin-mcp-server-ts/typescript-best-practices"><img src="https://agentmods.dev/badge/skills/joaovjo/linkedin-mcp-server-ts/typescript-best-practices.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 30 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,404 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00030 $0.01404
Opus 5 $0.00015 $0.00702
Sonnet 5 $0.00006 $0.00281
Haiku 4.5 $0.00003 $0.00140

Measured 9d ago against content hash d051c930bfe9, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

typescript-best-practices scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.agents/skills/typescript-best-practices/SKILL.md · 175 lines

How it starts

The opening of the file, as written. The whole thing — 175 lines — stays where its author put it; the contents beside it link to each section on GitHub.

TypeScript Best Practices & Style Guide

Segue as diretrizes normativas consolidadas em .agents/rules/typescript-style.md, combinando o Google TypeScript Style Guide, ts.dev e os padrões modernos do ecossistema Bun/Biome/Zod/MCP.


1. Modelagem de Tipos: interface vs. type

  • Use interface para formatos de objetos estruturados, contratos de classes, configurações (AppConfig) e opções de APIs/serviços:
    export interface ScraperOptions {
    	timeoutMs: number;
    	headless: boolean;
    	userAgent?: string;
    }
    
  • Use type para Uniões Discriminadas, Branded Types, Tipos Utilitários/Mapeados e inferências Zod:
    export type ConnectionState =
    	| { status: "connectable"; actionText: string }
    	| { status: "already_connected" }
    	| { status: "pending" }
    	| { status: "unavailable" };
    

2. Torne Estados Ilegais Irrepresentáveis (Make Illegal States Unrepresentable)

Use o sistema de tipos para prevenir estados inválidos em tempo de compilação.

Uniões discriminadas para estados mutuamente exclusivos:

// Bom: apenas combinações válidas são possíveis
type RequestState<T> =
  | { status: "idle" }
  | { status: "loading" }
  | { status: "success"; data: T }
  | { status: "error"; error: Error };

// Ruim: permite combinações inválidas como { loading: true, error: Error }
type RequestState<T> = {
  loading: boolean;
  data?: T;
  error?: Error;
};

Branded types para primitivos de domínio:

type UserId = string & { readonly __brand: "UserId" };
type OrderId = string & { readonly __brand: "OrderId" };

// O compilador impede passar OrderId onde UserId é esperado
function getUser(id: UserId): Promise<User> { /* ... */ }

Const assertions para uniões literais (Banido enum tradicional):

const ROLES = ["admin", "user", "guest"] as const;
type Role = typeof ROLES[number]; // "admin" | "user" | "guest"

function isValidRole(role: string): role is Role {
  return ROLES.includes(role as Role);
}

Read the full file on GitHub · 175 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 9d ago First seen · 175 lines · 30 tokens per session scan A d051c930bfe9

Subscribe to this mod's changes

typescript-best-practices is a skill published in the GitHub repository joaovjo/linkedin-mcp-server-ts (4 stars, last pushed 21d ago), licensed MIT. It adds 30 tokens to every session and 1,404 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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