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client-nodejs: Instructions file for Claude Code

CLAUDE.md

client-nodejs CLAUDE.md is an instructions file for Claude Code from nfe/client-nodejs. It costs 1,226 tokens per session, scanned A, original, MIT.

A project instruction file for Claude Code in the nfe/client-nodejs repository. It documents the project, development and build commands, test commands, and architecture.

In plain words
What is it for?
Use it when developing, building, testing, or understanding the architecture of nfe/client-nodejs.
Why use it?
It gives Claude Code the repository-specific context needed to work consistently with the project’s structure and commands.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md. Also seen: mentions CLAUDE.md; mentions Claude Code.

This is nfe/client-nodejs's own configuration. It tells Claude Code how to work on client-nodejs 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 client-nodejs configures →

not rated 141repo changed 6d ago A scan 1,226 tokens original MIT
View source ↗ nfe/client-nodejs nfe.io
Reuse

Borrowing it

Nothing to install: this file belongs to nfe/client-nodejs. 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/nfe/client-nodejs/master/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/nfe/client-nodejs

Made for: Claude Code.

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Per session 1,226 This file is loaded in full into every session.
When invoked 1,226 The same file — it is already loaded in full.
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 $0.01226 $0.01226
Opus 5.5 $0.00490 $0.00490
Sonnet 5.5 $0.00245 $0.00245
Haiku 4.5 $0.00123 $0.00123

Measured 6d ago against content hash ccd650307f67, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

client-nodejs CLAUDE.md 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 6d 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.

CLAUDE.md · 85 lines

How it starts

The opening of the file, as written. The whole thing — 85 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

Project Overview

Official NFE.io SDK for Node.js -- TypeScript native client for Brazilian electronic fiscal document APIs (NFS-e, NF-e, CT-e, CF-e). Version 3.x is a complete rewrite from the legacy v2 JavaScript/callback codebase (v2 lives in git history and is published as [email protected] on npm).

Build & Development Commands

npm run validate:spec    # Validate OpenAPI YAML specs
npm run generate         # Generate TypeScript types from OpenAPI specs into src/generated/
npm run build            # Full pipeline: validate:spec -> generate -> clean -> typecheck -> tsdown
npm run typecheck        # TypeScript strict check (tsc --noEmit)
npm run lint             # ESLint with auto-fix
npm run format           # Prettier formatting

Test Commands

npm test                 # Run all tests (vitest, watch mode)
npm test -- --run        # Run all tests once (no watch)
npm run test:unit        # Unit tests only (tests/unit/)
npm run test:integration # Integration tests only (tests/integration/)
npm run test:coverage    # Tests with v8 coverage report
npm test -- tests/unit/specific-file.test.ts  # Run a single test file

Coverage thresholds: 80% for branches, functions, lines, and statements. Test setup is in tests/setup.ts with mock data generators and test constants.

Architecture

Source Structure

  • src/index.ts -- Barrel export for all public API (NfeClient, types, errors)
  • src/core/client.ts -- Main NfeClient class with lazy-initialized resource getters and polling utilities
  • src/core/types.ts -- All TypeScript type definitions (config, resources, HTTP)
  • src/core/http/client.ts -- Fetch-based HTTP client with retry, timeout, rate-limit handling
  • src/core/errors/ -- Error hierarchy: NfeError base, then AuthenticationError, ValidationError, NotFoundError, RateLimitError, TimeoutError, ConnectionError, etc.
  • src/core/resources/ -- 17 resource implementations (service-invoices, companies, webhooks, etc.)
  • src/generated/ -- AUTO-GENERATED from OpenAPI specs. NEVER edit manually.

Read the full file on GitHub · 85 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. 6d ago Changed · +9 lines · +138 tokens per session ccd650307f67
  2. 1mo ago Changed · +2 lines · +170 tokens per session 24395b39fcc3
  3. 1mo ago First seen · 74 lines · 918 tokens per session scan A 0f9f5cebf9ad

Subscribe to this mod's changes

client-nodejs CLAUDE.md is an instructions file published in the GitHub repository nfe/client-nodejs (141 stars, last pushed 2d ago), licensed MIT. It adds 1,226 tokens to every session, about $0.0049 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 2026-08-30.

apijavascriptnfenfsenfse-nacionalnota-fiscal-eletronica
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