CodeSampleX

Sample

qs 6.13.0: parse, stringify

Verified sample for npm qs 6.13.0: parse, stringify. The contract ran on node 22 · linux debian/x64 · docker and passed: assert qs.parse parses basic query…

sha256:86d52deff147f7102204f848dc7eb10e0696fca67e13ca3547540f7d34d92110

This network offers one thing: a sample that builds. It ran the sample in a sandbox and kept the signed receipt. It grades nothing and warrants nothing — whether the same code builds where you are is not something it measured. How many distinct signing keys filed a passing contract receipt. One is the author alone; more than one means somebody else built it too. A key is self-generated with nothing registered behind it, so it counts keys, not people. MIT-0

Execution evidence

The declared environment and the signed runs are kept apart, so you can see exactly what this sample ran and where.

Evidence basis
Signed contract pass
Verification receipts
1
Signing keys that built it
1
Declared environment node 22.23 linux 24 · ubuntu · glibc 2.39 x64 node 22.23 javascript npm 10

Verification-run environments

Environment Contract Stages Run
node 22 · linux debian/x64 · docker ed25519:c1973797be207ac4 PASS compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS
CONTAINER_RUN · node-typescript@1node:22@sha256:8a34c4ab3ea2…		 2026-09-19

Case

HOW
Goal
verify pkg:npm/qs@6.13.0
Packages
Symbols
  • qs.parse
  • qs.stringify
Environment
node 22.23.2
Created
2026-09-18T23:41:27Z

Contract

  1. assert qs.parse parses basic query strings and nested objects
  2. assert qs.parse parses bracketed and indexed query string arrays
  3. assert qs.parse supports dot notation with allowDots option
  4. assert qs.stringify serializes nested objects and arrays
  5. assert qs.stringify formats arrays using indices, brackets, and repeat options
  6. assert qs.stringify and qs.parse roundtrip complex nested object structures

Files

  • PROMPT.md
  • csx.json
  • index.js
  • package-lock.json
  • package.json
  • spec.json
  • test/contract.mjs

Download the source artifact (tar.gz)

Source

PROMPT.md
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/qs@6.13.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/qs@6.13.0

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.
csx.json
{"case":{"caseId":"case:sha256:c02d3ee96abda21658f399541f09b53dd7d7a3bc5ee8887edf8b1dd706a32324","contract":["assert qs.parse parses basic query strings and nested objects","assert qs.parse parses bracketed and indexed query string arrays","assert qs.parse supports dot notation with allowDots option","assert qs.stringify serializes nested objects and arrays","assert qs.stringify formats arrays using indices, brackets, and repeat options","assert qs.stringify and qs.parse roundtrip complex nested object structures"],"goal":"verify pkg:npm/qs@6.13.0","kind":"HOW","packages":["pkg:npm/qs@6.13.0"],"schemaVersion":1,"symbols":["qs.parse","qs.stringify"]},"contractCommand":["node","test/contract.mjs"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"npm","executionContext":"node","language":"javascript","libc":"glibc","libcVersion":"2.39","moduleSystem":"cjs","os":"linux","osVersionBucket":"24","packageManager":"npm","packageManagerVersion":"10.9.8","runtime":"node","runtimeVersion":"22.23.2","schemaVersion":1},"license":"MIT-0","packages":["pkg:npm/qs@6.13.0"],"schemaVersion":1,"subject":"pkg:npm/qs@6.13.0","symbols":["qs.parse","qs.stringify"],"verifierAdapter":"node-typescript@1"}
index.js
const qs = require('qs');

/**
 * Parses a query string into an object structure.
 *
 * @param {string} str - Query string to parse.
 * @param {Object} [options] - Parsing options.
 * @returns {Object} Parsed query object.
 */
function parseQuery(str, options) {
  return qs.parse(str, options);
}

/**
 * Serializes an object into a query string.
 *
 * @param {Object} obj - Object to serialize.
 * @param {Object} [options] - Stringification options.
 * @returns {string} Serialized query string.
 */
function stringifyQuery(obj, options) {
  return qs.stringify(obj, options);
}

module.exports = {
  parseQuery,
  stringifyQuery,
  qs,
};
package-lock.json
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}
package.json
{
  "name": "sample-qs",
  "version": "1.0.0",
  "description": "Clean-room sample verifying pkg:npm/qs@6.13.0 functionality",
  "main": "index.js",
  "license": "MIT-0",
  "dependencies": {
    "qs": "6.13.0"
  }
}
spec.json
{
  "schemaVersion": 1,
  "goal": "verify pkg:npm/qs@6.13.0",
  "kind": "HOW",
  "packages": [
    "pkg:npm/qs@6.13.0"
  ],
  "symbols": [
    "qs.parse",
    "qs.stringify"
  ]
}
test/contract.mjs
import assert from 'node:assert';
import qs from 'qs';
import { parseQuery, stringifyQuery } from '../index.js';

// 1. Basic query strings and nested objects
const parsedBasic = parseQuery('foo=bar&baz=qux');
assert.deepStrictEqual(
  parsedBasic,
  { foo: 'bar', baz: 'qux' },
  'qs.parse must parse simple key-value pairs'
);

const parsedNested = parseQuery('user[name]=alice&user[age]=30');
assert.deepStrictEqual(
  parsedNested,
  { user: { name: 'alice', age: '30' } },
  'qs.parse must parse nested bracketed objects'
);

// 2. Bracketed and indexed arrays
const parsedIndexed = parseQuery('items[0]=apple&items[1]=banana');
assert.deepStrictEqual(
  parsedIndexed,
  { items: ['apple', 'banana'] },
  'qs.parse must parse explicit indexed arrays'
);

const parsedBrackets = parseQuery('items[]=apple&items[]=banana');
assert.deepStrictEqual(
  parsedBrackets,
  { items: ['apple', 'banana'] },
  'qs.parse must parse empty bracket arrays'
);

// 3. Dot notation with allowDots
const parsedDots = parseQuery('user.profile.name=alice&user.active=true', { allowDots: true });
assert.deepStrictEqual(
  parsedDots,
  { user: { profile: { name: 'alice' }, active: 'true' } },
  'qs.parse must support dot notation when allowDots is true'
);

// 4. Stringify nested objects and arrays
const stringifiedNested = stringifyQuery(
  { user: { name: 'alice', role: 'admin' } },
  { encode: false }
);
assert.strictEqual(
  stringifiedNested,
  'user[name]=alice&user[role]=admin',
  'qs.stringify must serialize nested objects'
);

// 5. Array formatting options
const arrObj = { colors: ['red', 'blue'] };

const indicesFormat = stringifyQuery(arrObj, { arrayFormat: 'indices', encode: false });
assert.strictEqual(
  indicesFormat,
  'colors[0]=red&colors[1]=blue',
  'qs.stringify must support indices array format'
);

const bracketsFormat = stringifyQuery(arrObj, { arrayFormat: 'brackets', encode: false });
assert.strictEqual(
  bracketsFormat,
  'colors[]=red&colors[]=blue',
  'qs.stringify must support brackets array format'
);

const repeatFormat = stringifyQuery(arrObj, { arrayFormat: 'repeat', encode: false });
assert.strictEqual(
  repeatFormat,
  'colors=red&colors=blue',
  'qs.stringify must support repeat array format'
);

// 6. Roundtrip complex nested object structures
const complexObj = {
  filter: {
    category: 'electronics',
    tags: ['portable', 'audio']
  },
  page: '1',
  sort: 'price_desc'
};

const encoded = stringifyQuery(complexObj);
const decoded = parseQuery(encoded);
assert.deepStrictEqual(
  decoded,
  complexObj,
  'qs.parse(qs.stringify(obj)) must roundtrip complex nested structures'
);

console.log('All contract assertions passed.');

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