What is first-plan-lens-typescript?

A Node.js and TypeScript project detector for the planning stage. It identifies frameworks, runtimes, build tools, package managers and monorepo setups from package.json and related files; a monorepo keeps several related packages or apps in one repository.

Use it to inspect Next.js, NestJS, Vite, SvelteKit, Astro, Remix, Nuxt, mobile, desktop and backend projects, including pnpm, Turborepo and Nx workspaces.

It helps an agent understand the project's actual structure before proposing code changes. This reduces suggestions that use the wrong framework, runtime, module system or workspace commands.

first-plan-lens-typescript — Skill for Claude Code by vynazevedo

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent

npx skills add vynazevedo/first-plan --skill lens-typescript

Clone the repo

git clone --depth 1 https://github.com/vynazevedo/first-plan

Made for: Claude Code.

Or install fp, the plugin that ships this one along with the rest of its 19 skills, 19 commands, 4 agents, 1 hook.

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/vynazevedo/first-plan/lens-typescript.svg)](https://agentmods.dev/skills/vynazevedo/first-plan/lens-typescript)

Your own site

<a href="https://agentmods.dev/skills/vynazevedo/first-plan/lens-typescript"><img src="https://agentmods.dev/badge/skills/vynazevedo/first-plan/lens-typescript.svg" alt="Measured on agentmods" height="20"></a>

Per session 59 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,173 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.

Model	Per session	Once invoked
Fable 5.1	$0.00059	$0.01173
Opus 5	$0.00030	$0.00587
Sonnet 5	$0.00012	$0.00235
Haiku 4.5	$0.00006	$0.00117

Measured 7d ago against content hash 44c07a9fa1b7, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

first-plan-lens-typescript 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 7d 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.

skills/lens-typescript/SKILL.md · 122 lines

How it starts

The opening of the file, as written. The whole thing — 122 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Lens TypeScript / Node

Detecção fina

Pelo package.json + arquivos auxiliares:

Sinal	Variante
`next.config.{js,ts,mjs}`	Next.js
`nest-cli.json` ou `@nestjs/*` em deps	NestJS
`vite.config.{js,ts}` sem framework	SPA Vite
`vite.config.{js,ts}` + `@sveltejs/kit`	SvelteKit
`astro.config.{js,ts,mjs}`	Astro
`remix.config.{js,ts}`	Remix
`@nuxt/kit` ou `nuxt.config.{js,ts}`	Nuxt
`expo` em deps	Expo (mobile)
`react-native` em deps	React Native bare
`electron` em deps	Electron
`bin` field no package.json sem framework	CLI Node
`express` ou `fastify` em deps	Backend tradicional
`pnpm-workspace.yaml`	Monorepo pnpm
`turbo.json`	Turborepo
`nx.json`	Nx

Extração de padrões

Module system e tooling

"type": "module" no package.json -> ESM
tsconfig.json -> verificar strict, noImplicitAny, paths, target, module
Bundler: tsx / tsc / esbuild / swc / vite / webpack / rollup
Runtime: Node, Bun, Deno

Validação de schemas

zod em deps -> Zod
yup em deps -> Yup
io-ts -> io-ts
class-validator + class-transformer -> nestjs-style
valibot, arktype -> opções modernas
joi -> Joi (legacy)

Verificar onde validação acontece (boundary handlers? service layer?)

Async patterns

Promises com .then/.catch ou async/await?
RxJS em deps -> reactive style (comum em Angular/NestJS)
Effect library?

Error handling

Try/catch tradicional
Result<T, E> library (neverthrow, effect)
HTTP errors customizados (extends Error)
Sentry / NewRelic / observability vendor em deps

Testing

vitest, jest, mocha, ava, tap?
Test runner config (vitest.config.ts, jest.config.js)
Coverage tool (c8, nyc)
E2E (playwright, cypress, webdriverio)?
Mocks: vi.mock, jest.mock, sinon, nock (HTTP)?

Frontend específico (se Next/Remix/Vite/etc)

Sistema de design (Tailwind / CSS Modules / styled-components / emotion / vanilla-extract)
State (zustand, redux, jotai, recoil, pinia, mobx, Context apenas)
Data fetching (@tanstack/react-query, swr, apollo, urql, server components)
Forms (react-hook-form, formik, superforms)
Roteamento (App Router vs Pages Router em Next; file-based em Astro)
i18n (next-intl, i18next)

Read the full file on GitHub · 122 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.

7d ago First seen · 122 lines · 59 tokens per session scan A 44c07a9fa1b7

Subscribe to this mod's changes

first-plan-lens-typescript is a skill published in the GitHub repository vynazevedo/first-plan (23 stars, last pushed 13d ago), licensed MIT. It adds 59 tokens to every session and 1,173 once invoked, about $0.0003 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 2026-08-30.

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