CodeSampleX

Exemplo

@eslint-community/eslint-utils 4.10.1

Amostra verificada para npm @eslint-community/eslint-utils 4.10.1. O contrato rodou em node 22 · linux alpine/x64 · docker e passou.

sha256:04b93e31c8918063943f88f1aeed94761557f536dc13dc0b15f792d78279c3de

Esta rede oferece uma coisa: uma amostra que compila. Ela a executou em um sandbox e guardou o recibo assinado. Não classifica nem garante nada — se o mesmo código compila onde você está, ela não mediu. Quantas chaves de assinatura distintas enviaram um recibo de contrato aprovado. Uma é só o autor; mais de uma significa que outra pessoa também o compilou. Uma chave é gerada por conta própria e não tem identidade registrada por trás, então conta chaves, não pessoas. MIT-0

Evidência de execução

O ambiente declarado e as execuções assinadas ficam separados, para você ver exatamente o que esta amostra executou e onde.

Base da evidência
Contrato assinado aprovado
Recibos de verificação
1
Chaves de assinatura que o compilaram
1
Ambiente declarado node 22.23 linux 24 · ubuntu · glibc 2.39 x64 node 22.23 javascript npm

Ambientes das execuções de verificação

Ambiente Contrato Etapas Execução
node 22 · linux alpine/x64 · docker ed25519:c1973797be207ac4 PASS compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS
CONTAINER_RUN · node-typescript@1		 2026-08-20

Caso

HOW
Objetivo
verify pkg:npm/%40eslint-community/eslint-utils@4.10.1
Pacotes
Ambiente
node 22.23.2
Criado
2026-08-20T23:45:49Z

Contrato

  1. getPropertyName extracts static and computed property names from MemberExpression and Property AST nodes
  2. getStaticValue evaluates constant literal expressions, template literals, and binary operations to their static runtime values
  3. getStringIfConstant converts constant literals or static template literals into string representations
  4. hasSideEffect determines whether an AST expression contains state mutations or function calls
  5. PatternMatcher finds all RegExp matches across target source strings and tracks match indices
  6. ReferenceTracker traverses global variable references and matches specified call and read access patterns

Arquivos

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

Baixar o artefato de código-fonte (tar.gz)

Código-fonte

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/%40eslint-community/eslint-utils@4.10.1
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/%40eslint-community/eslint-utils@4.10.1
Constraints:
  - executionContext: node
Required runtime conditions:
  - ecosystem: npm
  - language: javascript
  - moduleSystem: cjs
  - runtime: node@22.23.2

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:sha256:7f058e97e5805c478dcbf07e2ae66d66c58aaaf7924bdb87b1043f0152af589f","constraints":{"executionContext":"node"},"contract":["getPropertyName extracts static and computed property names from MemberExpression and Property AST nodes","getStaticValue evaluates constant literal expressions, template literals, and binary operations to their static runtime values","getStringIfConstant converts constant literals or static template literals into string representations","hasSideEffect determines whether an AST expression contains state mutations or function calls","PatternMatcher finds all RegExp matches across target source strings and tracks match indices","ReferenceTracker traverses global variable references and matches specified call and read access patterns"],"goal":"verify pkg:npm/%40eslint-community/eslint-utils@4.10.1","kind":"HOW","packages":["pkg:npm/%40eslint-community/eslint-utils@4.10.1"],"schemaVersion":1},"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","runtime":"node","runtimeVersion":"22.23.2","schemaVersion":1},"license":"MIT-0","packages":["pkg:npm/%40eslint-community/eslint-utils@4.10.1"],"schemaVersion":1,"subject":"pkg:npm/%40eslint-community/eslint-utils@4.10.1","verifierAdapter":"node-typescript@1"}
package-lock.json
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        "isexe": "^2.0.0"
      },
      "bin": {
        "node-which": "bin/node-which"
      },
      "engines": {
        "node": ">= 8"
      }
    },
    "node_modules/word-wrap": {
      "version": "1.2.5",
      "resolved": "https://registry.npmjs.org/word-wrap/-/word-wrap-1.2.5.tgz",
      "integrity": "sha512-BN22B5eaMMI9UMtjrGd5g5eCYPpCPDUy0FJXbYsaT5zYxjFOckS53SQDE3pWkVoWpHXVb3BrYcEN4Twa55B5cA==",
      "license": "MIT",
      "peer": true,
      "engines": {
        "node": ">=0.10.0"
      }
    },
    "node_modules/yocto-queue": {
      "version": "0.1.0",
      "resolved": "https://registry.npmjs.org/yocto-queue/-/yocto-queue-0.1.0.tgz",
      "integrity": "sha512-rVksvsnNCdJ/ohGc6xgPwyN8eheCxsiLM8mxuE/t/mOVqJewPuO1miLpTHQiRgTKCLexL4MeAFVagts7HmNZ2Q==",
      "license": "MIT",
      "peer": true,
      "engines": {
        "node": ">=10"
      },
      "funding": {
        "url": "https://github.com/sponsors/sindresorhus"
      }
    }
  }
}
package.json
{
  "name": "sample-eslint-utils",
  "version": "1.0.0",
  "type": "module",
  "license": "MIT-0",
  "dependencies": {
    "@eslint-community/eslint-utils": "4.10.1"
  }
}
spec.json
{
  "schemaVersion": 1,
  "goal": "verify pkg:npm/%40eslint-community/eslint-utils@4.10.1",
  "kind": "HOW",
  "packages": [
    "pkg:npm/%40eslint-community/eslint-utils@4.10.1"
  ],
  "constraints": {
    "executionContext": "node"
  },
  "runtimeConditions": {
    "ecosystem": "npm",
    "language": "javascript",
    "moduleSystem": "cjs",
    "runtime": "node@22.23.2"
  }
}
test/contract.mjs
import assert from 'node:assert/strict';
import { createRequire } from 'node:module';

const require = createRequire(import.meta.url);
const {
  getPropertyName,
  getStaticValue,
  getStringIfConstant,
  hasSideEffect,
  PatternMatcher,
  ReferenceTracker,
  CALL,
  READ,
  CONSTRUCT,
  ESM
} = require('@eslint-community/eslint-utils');

// 1. getPropertyName extracts static and computed property names from MemberExpression and Property AST nodes
{
  const staticMember = {
    type: 'MemberExpression',
    object: { type: 'Identifier', name: 'process' },
    property: { type: 'Identifier', name: 'env' },
    computed: false
  };
  assert.equal(getPropertyName(staticMember), 'env');

  const computedMember = {
    type: 'MemberExpression',
    object: { type: 'Identifier', name: 'config' },
    property: { type: 'Literal', value: 'port', raw: '"port"' },
    computed: true
  };
  assert.equal(getPropertyName(computedMember), 'port');

  const propNode = {
    type: 'Property',
    key: { type: 'Identifier', name: 'host' },
    value: { type: 'Literal', value: 'localhost' },
    kind: 'init',
    method: false,
    shorthand: false,
    computed: false
  };
  assert.equal(getPropertyName(propNode), 'host');
}

// 2. getStaticValue evaluates constant literal expressions, template literals, and binary operations to their static runtime values
{
  const literalNode = { type: 'Literal', value: 42, raw: '42' };
  assert.deepEqual(getStaticValue(literalNode), { value: 42 });

  const binaryNode = {
    type: 'BinaryExpression',
    operator: '+',
    left: { type: 'Literal', value: 100 },
    right: { type: 'Literal', value: 25 }
  };
  assert.deepEqual(getStaticValue(binaryNode), { value: 125 });

  const templateNode = {
    type: 'TemplateLiteral',
    quasis: [
      { type: 'TemplateElement', value: { cooked: 'hello ', raw: 'hello ' } },
      { type: 'TemplateElement', value: { cooked: 'world', raw: 'world' } }
    ],
    expressions: [{ type: 'Literal', value: 'there' }]
  };
  assert.deepEqual(getStaticValue(templateNode), { value: 'hello thereworld' });
}

// 3. getStringIfConstant converts constant literals or static template literals into string representations
{
  const strLit = { type: 'Literal', value: 'strict-mode', raw: '"strict-mode"' };
  assert.equal(getStringIfConstant(strLit), 'strict-mode');

  const numLit = { type: 'Literal', value: 123, raw: '123' };
  assert.equal(getStringIfConstant(numLit), '123');

  const dynamicIdent = { type: 'Identifier', name: 'dynamicVar' };
  assert.equal(getStringIfConstant(dynamicIdent), null);

  const staticTemplate = {
    type: 'TemplateLiteral',
    quasis: [{ type: 'TemplateElement', value: { cooked: 'constant-text', raw: 'constant-text' } }],
    expressions: []
  };
  assert.equal(getStringIfConstant(staticTemplate), 'constant-text');
}

// 4. hasSideEffect determines whether an AST expression contains state mutations or function calls
{
  const emptySourceCode = {};
  const pureNode = { type: 'Literal', value: 10 };
  assert.equal(hasSideEffect(pureNode, emptySourceCode), false);

  const callExpression = {
    type: 'CallExpression',
    callee: { type: 'Identifier', name: 'execute' },
    arguments: []
  };
  assert.equal(hasSideEffect(callExpression, emptySourceCode), true);

  const assignmentExpression = {
    type: 'AssignmentExpression',
    operator: '=',
    left: { type: 'Identifier', name: 'total' },
    right: { type: 'Literal', value: 0 }
  };
  assert.equal(hasSideEffect(assignmentExpression, emptySourceCode), true);
}

// 5. PatternMatcher finds all RegExp matches across target source strings and tracks match indices
{
  const matcher = new PatternMatcher(/item-(\d+)/g);
  const text = 'item-10 and item-20';
  const matches = Array.from(matcher.execAll(text));

  assert.equal(matches.length, 2);
  assert.equal(matches[0][0], 'item-10');
  assert.equal(matches[0][1], '10');
  assert.equal(matches[0].index, 0);

  assert.equal(matches[1][0], 'item-20');
  assert.equal(matches[1][1], '20');
  assert.equal(matches[1].index, 12);
}

// 6. ReferenceTracker traverses global variable references and matches specified call and read access patterns
{
  const mockGlobalScope = {
    set: new Map([
      [
        'fetch',
        {
          name: 'fetch',
          defs: [],
          references: [
            {
              identifier: { type: 'Identifier', name: 'fetch' },
              isRead: () => true,
              isWrite: () => false,
              init: false
            }
          ]
        }
      ]
    ])
  };

  const tracker = new ReferenceTracker(mockGlobalScope);
  const traceMap = {
    fetch: {
      [CALL]: true,
      [READ]: true
    }
  };

  const references = Array.from(tracker.iterateGlobalReferences(traceMap));
  assert.equal(references.length, 1);
  assert.equal(references[0].node.name, 'fetch');
  assert.deepEqual(references[0].path, ['fetch']);
  assert.equal(references[0].type, READ);
}

console.log('Contract assertions passed.');

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