CodeSampleX

Sample

cacache 19.0.1: rm

Verified sample for npm cacache 19.0.1: rm. The contract ran on node 22 · linux debian/x64 · docker and passed: cacache.rm and cacache.rm.entry remove a key…

sha256:4b7a2167a5b34883242762902a3c10ab817f596221f3b7d5ec2bcb3c96f589f9

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 linux 24 · ubuntu · glibc 2.39 x64 npm

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…		 2026-10-17

Case

HOW
Goal
verify cacache.rm in pkg:npm/cacache@19.0.1
Packages
Symbols
  • cacache.rm
Created
2026-10-17T13:17:04Z

Contract

  1. cacache.rm and cacache.rm.entry remove a key from the index while leaving its content blob intact until removed
  2. cacache.rm.content deletes the stored content blob identified by its sha512 integrity digest
  3. cacache.rm.all clears all index and content directories from the cache

Files

  • PROMPT.md
  • csx.json
  • package-lock.json
  • package.json
  • spec.json
  • src/index.mjs
  • 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 cacache.rm 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.rm

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:sha256:901c454bbbb1b05f91392e8835c55ade86eddaf2caf992c8e6c2718907b54398","contract":["cacache.rm and cacache.rm.entry remove a key from the index while leaving its content blob intact until removed","cacache.rm.content deletes the stored content blob identified by its sha512 integrity digest","cacache.rm.all clears all index and content directories from the cache"],"goal":"verify cacache.rm in pkg:npm/cacache@19.0.1","kind":"HOW","packages":["pkg:npm/cacache@19.0.1"],"schemaVersion":1,"symbols":["cacache.rm"]},"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.rm"],"verifierAdapter":"node-typescript@1"}
package-lock.json
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  "name": "cacache-rm-sample",
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  "lockfileVersion": 3,
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package.json
{
  "name": "cacache-rm-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.rm in pkg:npm/cacache@19.0.1",
  "kind": "HOW",
  "packages": [
    "pkg:npm/cacache@19.0.1"
  ],
  "symbols": [
    "cacache.rm"
  ]
}
src/index.mjs
import cacache from 'cacache';

export async function verifyCacacheRemoval(cacheDir) {
  const keyAlpha = 'item-alpha';
  const keyBeta = 'item-beta';
  const keyGamma = 'item-gamma';

  const integrityAlpha = await cacache.put(cacheDir, keyAlpha, Buffer.from('alpha-payload', 'utf8'));
  const integrityBeta = await cacache.put(cacheDir, keyBeta, Buffer.from('beta-payload', 'utf8'));
  const integrityGamma = await cacache.put(cacheDir, keyGamma, Buffer.from('gamma-payload', 'utf8'));

  // Remove index entry via cacache.rm(cache, key) directly (alias of cacache.rm.entry)
  await cacache.rm(cacheDir, keyAlpha);
  const alphaInfoAfterRm = await cacache.get.info(cacheDir, keyAlpha);
  const alphaContentStillPresent = await cacache.get.hasContent(cacheDir, integrityAlpha);

  // Remove content blob via cacache.rm.content(cache, integrity)
  await cacache.rm.content(cacheDir, integrityAlpha);
  const alphaContentAfterRmContent = await cacache.get.hasContent(cacheDir, integrityAlpha);

  // Remove index entry via cacache.rm.entry(cache, key)
  await cacache.rm.entry(cacheDir, keyBeta);
  const betaInfoAfterEntryRm = await cacache.get.info(cacheDir, keyBeta);

  // Remove all remaining index and content directories via cacache.rm.all(cache)
  await cacache.rm.all(cacheDir);
  const listingAfterRmAll = await cacache.ls(cacheDir);
  const gammaContentAfterRmAll = await cacache.get.hasContent(cacheDir, integrityGamma);

  return {
    alphaInfoAfterRm,
    alphaContentStillPresent: Boolean(alphaContentStillPresent),
    alphaContentAfterRmContent,
    betaInfoAfterEntryRm,
    remainingKeysAfterRmAll: Object.keys(listingAfterRmAll),
    gammaContentAfterRmAll
  };
}
test/contract.mjs
import assert from 'node:assert/strict';
import { rm } from 'node:fs/promises';
import { verifyCacacheRemoval } from '../src/index.mjs';

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

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

  assert.equal(result.alphaInfoAfterRm, null);
  assert.equal(result.alphaContentStillPresent, true);
  assert.equal(result.alphaContentAfterRmContent, false);
  assert.equal(result.betaInfoAfterEntryRm, null);
  assert.deepEqual(result.remainingKeysAfterRmAll, []);
  assert.equal(result.gammaContentAfterRmAll, false);
} finally {
  await rm(cacheDir, { recursive: true, force: true });
}

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