cidr-regex 4.1.3: cidrRegex.v6

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 cidrRegex.v6 in pkg:npm/cidr-regex@4.1.3
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/cidr-regex@4.1.3
Demonstrate these symbols/APIs:
  - cidrRegex.v6

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:eac3af331f42faecd91ba15ada7cf3e42486d9f7da2e87fba5905ef1d800b393","contract":["cidrRegex.v6 equals the named v6 export","cidrRegex.v6({ exact: true }) matches valid IPv6 CIDR strings (prefix 0-128) and rejects IPv4 CIDRs, invalid prefixes, or surrounding text","cidrRegex.v6() defaults to a global RegExp that extracts IPv6 CIDR blocks from text"],"goal":"verify cidrRegex.v6 in pkg:npm/cidr-regex@4.1.3","kind":"HOW","packages":["pkg:npm/cidr-regex@4.1.3"],"schemaVersion":1,"symbols":["cidrRegex.v6"]},"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","schemaVersion":1},"license":"MIT-0","packages":["pkg:npm/cidr-regex@4.1.3"],"schemaVersion":1,"subject":"pkg:npm/cidr-regex@4.1.3","symbols":["cidrRegex.v6"],"verifierAdapter":"node-typescript@1"}

import cidrRegex, { v6 } from "cidr-regex";

export function isCidrV6(input) {
  return cidrRegex.v6({ exact: true }).test(input);
}

export function extractCidrV6s(text) {
  return text.match(cidrRegex.v6()) ?? [];
}

export { cidrRegex, v6 };

{
  "name": "cidr-regex-v6-sample",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "cidr-regex-v6-sample",
      "version": "1.0.0",
      "dependencies": {
        "cidr-regex": "4.1.3"
      }
    },
    "node_modules/cidr-regex": {
      "version": "4.1.3",
      "resolved": "https://registry.npmjs.org/cidr-regex/-/cidr-regex-4.1.3.tgz",
      "integrity": "sha512-86M1y3ZeQvpZkZejQCcS+IaSWjlDUC+ORP0peScQ4uEUFCZ8bEQVz7NlJHqysoUb6w3zCjx4Mq/8/2RHhMwHYw==",
      "license": "BSD-2-Clause",
      "dependencies": {
        "ip-regex": "^5.0.0"
      },
      "engines": {
        "node": ">=14"
      }
    },
    "node_modules/ip-regex": {
      "version": "5.0.0",
      "resolved": "https://registry.npmjs.org/ip-regex/-/ip-regex-5.0.0.tgz",
      "integrity": "sha512-fOCG6lhoKKakwv+C6KdsOnGvgXnmgfmp0myi3bcNwj3qfwPAxRKWEuFhvEFF7ceYIz6+1jRZ+yguLFAmUNPEfw==",
      "license": "MIT",
      "engines": {
        "node": "^12.20.0 || ^14.13.1 || >=16.0.0"
      },
      "funding": {
        "url": "https://github.com/sponsors/sindresorhus"
      }
    }
  }
}

{
  "name": "cidr-regex-v6-sample",
  "version": "1.0.0",
  "private": true,
  "type": "module",
  "scripts": {
    "test": "node test/contract.mjs"
  },
  "dependencies": {
    "cidr-regex": "4.1.3"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify cidrRegex.v6 in pkg:npm/cidr-regex@4.1.3",
  "kind": "HOW",
  "packages": [
    "pkg:npm/cidr-regex@4.1.3"
  ],
  "symbols": [
    "cidrRegex.v6"
  ]
}

import assert from "node:assert/strict";
import { cidrRegex, v6, isCidrV6, extractCidrV6s } from "../index.mjs";

// Default export property matches named v6 export
assert.equal(cidrRegex.v6, v6);

// Exact matching for IPv6 CIDR notation (prefix 0-128)
assert.equal(isCidrV6("2001:db8::/32"), true);
assert.equal(isCidrV6("fe80::1/128"), true);
assert.equal(isCidrV6("::/0"), true);
assert.equal(isCidrV6("2001:db8::/129"), false);
assert.equal(isCidrV6("2001:db8::"), false);
assert.equal(isCidrV6("192.168.0.0/24"), false);
assert.equal(isCidrV6("subnet 2001:db8::/32 here"), false);

// Global extraction of IPv6 CIDR blocks from text
const text = "Ranges: 10.0.0.0/8, 2001:db8:abcd::/48, and fe80::/10.";
assert.deepEqual(extractCidrV6s(text), ["2001:db8:abcd::/48", "fe80::/10"]);
assert.deepEqual(extractCidrV6s("only ipv4 192.168.1.0/24 here"), []);