CodeSampleX

Exemple

cacache 19.0.1: verify

Échantillon vérifié pour npm cacache 19.0.1: verify. Le contrat s'est exécuté sur node 22 · linux debian/x64 · docker et a réussi.

sha256:29df5c443a8078571a02caebc51010764b450021c7f2e26c23ae7932f3f187d9

Ce réseau offre une seule chose : un échantillon qui compile. Il l'a exécuté dans un bac à sable et conservé le reçu signé. Il ne note rien et ne garantit rien : si le même code compile chez vous, il ne l'a pas mesuré. Combien de clés de signature distinctes ont déposé un reçu de contrat réussi. Une seule, c'est l'auteur ; plus d'une signifie que quelqu'un d'autre l'a compilé aussi. Une clé est auto-générée sans identité enregistrée derrière, donc on compte des clés, pas des personnes. MIT-0

Preuves d'exécution

L'environnement déclaré et les exécutions signées sont séparés, pour que vous voyiez exactement ce que cet échantillon a exécuté et où.

Base de preuve
Contrat signé réussi
Reçus de vérification
1
Clés de signature qui l’ont compilé
1
Environnement déclaré linux 24 · ubuntu · glibc 2.39 x64 npm

Environnements des exécutions de vérification

Environnement Contrat Étapes Exécution
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…		 2026-10-17

Cas

HOW
Objectif
verify cacache.verify in pkg:npm/cacache@19.0.1
Paquets
Symboles
  • cacache.verify
Créé
2026-10-17T13:20:39Z

Contrat

  1. cacache.verify validates active cache entries, garbage-collects unreferenced content, and returns verification statistics
  2. cacache.verify accepts a filter callback to selectively retain or exclude index entries during verification
  3. cacache.verify.lastRun returns a valid Date timestamp recording when cache verification last completed

Fichiers

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

Télécharger l’artefact source (tar.gz)

Code 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 cacache.verify in pkg:npm/cacache@19.0.1
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/cacache@19.0.1
Demonstrate these symbols/APIs:
  - cacache.verify

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:sha256:98ac51842cbb979baba308cb6503d23d1f1360016e0b01e7b8def7cc4706bdcc","contract":["cacache.verify validates active cache entries, garbage-collects unreferenced content, and returns verification statistics","cacache.verify accepts a filter callback to selectively retain or exclude index entries during verification","cacache.verify.lastRun returns a valid Date timestamp recording when cache verification last completed"],"goal":"verify cacache.verify in pkg:npm/cacache@19.0.1","kind":"HOW","packages":["pkg:npm/cacache@19.0.1"],"schemaVersion":1,"symbols":["cacache.verify"]},"contractCommand":["node","test/contract.mjs"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"npm","libc":"glibc","libcVersion":"2.39","os":"linux","osVersionBucket":"24","packageManager":"npm","schemaVersion":1},"license":"MIT-0","packages":["pkg:npm/cacache@19.0.1"],"schemaVersion":1,"subject":"pkg:npm/cacache@19.0.1","symbols":["cacache.verify"],"verifierAdapter":"node-typescript@1"}
package-lock.json
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  "name": "cacache-verify-sample",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
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package.json
{
  "name": "cacache-verify-sample",
  "version": "1.0.0",
  "private": true,
  "type": "module",
  "scripts": {
    "test": "node test/contract.mjs"
  },
  "dependencies": {
    "cacache": "19.0.1"
  }
}
spec.json
{
  "schemaVersion": 1,
  "goal": "verify cacache.verify in pkg:npm/cacache@19.0.1",
  "kind": "HOW",
  "packages": [
    "pkg:npm/cacache@19.0.1"
  ],
  "symbols": [
    "cacache.verify"
  ]
}
src/index.mjs
import cacache from 'cacache';

export async function verifyCacheStore(cacheDir) {
  await cacache.put(cacheDir, 'entry-alpha', Buffer.from('alpha payload', 'utf8'));
  await cacache.put(cacheDir, 'entry-beta', Buffer.from('beta payload', 'utf8'));
  await cacache.rm.entry(cacheDir, 'entry-beta');

  const stats = await cacache.verify(cacheDir, {
    filter: (entry) => entry.key.startsWith('entry-')
  });
  const lastRun = await cacache.verify.lastRun(cacheDir);

  return {
    verifiedContent: stats.verifiedContent,
    keptSize: stats.keptSize,
    reclaimedCount: stats.reclaimedCount,
    totalEntries: stats.totalEntries,
    rejectedEntries: stats.rejectedEntries,
    lastRunTime: lastRun.getTime()
  };
}
test/contract.mjs
import assert from 'node:assert/strict';
import { rm } from 'node:fs/promises';
import { verifyCacheStore } from '../src/index.mjs';

const cacheDir = './.cache-verify-test';

await rm(cacheDir, { recursive: true, force: true });
try {
  const result = await verifyCacheStore(cacheDir);

  assert.equal(result.verifiedContent, 1);
  assert.equal(result.keptSize, 13);
  assert.equal(result.reclaimedCount, 1);
  assert.equal(result.totalEntries, 1);
  assert.equal(result.rejectedEntries, 0);
  assert.equal(Number.isFinite(result.lastRunTime) && result.lastRunTime > 0, true);
} finally {
  await rm(cacheDir, { recursive: true, force: true });
}

Seeder d'origine

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