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.
curl -O https://raw.githubusercontent.com/joaovjo/linkedin-mcp-server-ts/main/.agents/skills/typescript-best-practices/SKILL.mdgit clone --depth 1 https://github.com/joaovjo/linkedin-mcp-server-tsWrote 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.
[](https://agentmods.dev/skills/joaovjo/linkedin-mcp-server-ts/typescript-best-practices)<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/github.svg" alt="Measured on agentmods" height="20"></a>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.
<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>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00030 | $0.01404 |
| Opus 5.5 | $0.00012 | $0.00562 |
| Sonnet 5.5 | $0.00006 | $0.00281 |
| Haiku 4.5 | $0.00003 | $0.00140 |
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 2mo 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.
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
interfacepara formatos de objetos estruturados, contratos de classes, configurações (AppConfig) e opções de APIs/serviços:export interface ScraperOptions { timeoutMs: number; headless: boolean; userAgent?: string; } - Use
typepara 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);
}
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.
- 2mo ago First seen · 175 lines · 30 tokens per session scan A d051c930bfe9
typescript-best-practices is a skill published in the GitHub repository joaovjo/linkedin-mcp-server-ts (4 stars, last pushed 2mo ago), licensed MIT. It adds 30 tokens to every session and 1,404 once invoked, about $0.0001 per session on Opus 5.5. 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.
Other skills, from other repositories
no-bare-casts
Writing as in TypeScript or TSX production code, modifying a file that contains a bare as cast, silencing a type error with a cast, encountering as unknown as, or reviewing a cast site.
aws-sst-development
SST v4 (Ion) expert for managing AWS resources as code with the Pulumi-backed framework.
league-akari-shard-development
Use when creating, extending, refactoring, splitting, or reviewing League Akari main or renderer shards, including shard file organization, controller/loader/executor/handler boundaries, naming conventions, renderer TSX usage, platform guards, and public contract compatibility.
dd-code-generation
Use pup CLI for immediate Datadog operations or generate code for integration into applications.
fast-typescript-check
Keep www-sacred's TypeScript fast to type-check and fast to run. Use when touching the ASCII/canvas animation components (the only real per-frame code here), tightening type-check wall-clock, or auditing a change for runtime or compiler regressions. Scoped to this repo — a React 19 / Next.js 16 component library plus…
typescript-magician
Designs complex generic types, refactors any types to strict alternatives, creates type guards and utility types, and resolves TypeScript compiler errors. Use when the user asks about TypeScript (TS) types, generics, type inference, type guards, removing any types, strict typing, type errors, infer, extends…