@npmcli/name-from-folder 3.0.0

Clean-room public code sample — generation instructions

Write a brand-new, minimal, self-contained code sample in this clean-room directory.
Do not copy, paraphrase, or reference any existing project source. Work only from this spec.

A csx.json manifest scaffold already exists. Do not recreate it from memory. Preserve its case.goal, packages and symbols; fill its empty case.contract with exact assertions and correct its environment, commands and verifierAdapter for the files you generate.

Goal: verify pkg:npm/%40npmcli/name-from-folder@3.0.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/%40npmcli/name-from-folder@3.0.0

Rules:
  - One focused purpose; the smallest project that proves the goal.
  - Include a contract test (test/contract.*) that runs OFFLINE and exits 0 exactly when the goal behavior works.
  - Pin every dependency with a lockfile so resolution is reproducible.
  - No secrets, credentials, or tokens. No real URLs (only example.com or localhost). No absolute paths.
  - No personal names, emails, company names, or project identifiers of any kind.
  - No binaries and no generated output (node_modules, dist, target, venv, .git, .env).
  - Keep it under 200 files and 256KB packed.

{"case":{"caseId":"case:sha256:f6780b2a1db7877ecc739c2cecedc1012a758f23da5565272c8e0a26cddbc6da","contract":["nameFromFolder returns the leaf folder name for an unscoped folder path","nameFromFolder returns '@scope/name' when the parent directory starts with '@'","nameFromFolder returns false when given an empty folder path"],"goal":"verify pkg:npm/%40npmcli/name-from-folder@3.0.0","kind":"HOW","packages":["pkg:npm/%40npmcli/name-from-folder@3.0.0"],"schemaVersion":1},"contractCommand":["node","test/contract.mjs"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"npm","executionContext":"node","libc":"glibc","libcVersion":"2.39","moduleSystem":"esm","os":"linux","osVersionBucket":"24","packageManager":"npm","packageManagerVersion":"10.9.8","runtime":"node","runtimeVersion":"22.23","schemaVersion":1},"license":"MIT-0","packages":["pkg:npm/%40npmcli/name-from-folder@3.0.0"],"schemaVersion":1,"subject":"pkg:npm/%40npmcli/name-from-folder@3.0.0","verifierAdapter":"node-typescript@1"}

{
  "name": "verify-name-from-folder",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "verify-name-from-folder",
      "version": "1.0.0",
      "dependencies": {
        "@npmcli/name-from-folder": "3.0.0"
      }
    },
    "node_modules/@npmcli/name-from-folder": {
      "version": "3.0.0",
      "resolved": "https://registry.npmjs.org/@npmcli/name-from-folder/-/name-from-folder-3.0.0.tgz",
      "integrity": "sha512-61cDL8LUc9y80fXn+lir+iVt8IS0xHqEKwPu/5jCjxQTVoSCmkXvw4vbMrzAMtmghz3/AkiBjhHkDKUH+kf7kA==",
      "license": "ISC",
      "engines": {
        "node": "^18.17.0 || >=20.5.0"
      }
    }
  }
}

{
  "name": "verify-name-from-folder",
  "version": "1.0.0",
  "private": true,
  "type": "module",
  "scripts": {
    "test": "node test/contract.mjs"
  },
  "dependencies": {
    "@npmcli/name-from-folder": "3.0.0"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify pkg:npm/%40npmcli/name-from-folder@3.0.0",
  "kind": "HOW",
  "packages": [
    "pkg:npm/%40npmcli/name-from-folder@3.0.0"
  ]
}

import nameFromFolder from "@npmcli/name-from-folder";

export function derivePackageName(folderPath) {
  return nameFromFolder(folderPath);
}

import assert from "node:assert/strict";
import path from "node:path";
import nameFromFolder from "@npmcli/name-from-folder";
import { derivePackageName } from "../src/index.mjs";

const unscopedFolder = path.join("workspace", "my-pkg");
assert.equal(nameFromFolder(unscopedFolder), "my-pkg");
assert.equal(derivePackageName(unscopedFolder), "my-pkg");

const scopedFolder = path.join("workspace", "@scope", "scoped-pkg");
assert.equal(nameFromFolder(scopedFolder), "@scope/scoped-pkg");
assert.equal(derivePackageName(scopedFolder), "@scope/scoped-pkg");

assert.equal(nameFromFolder(""), false);
assert.equal(derivePackageName(""), false);