semver 7.8.5: valid, clean, satisfies

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/semver@7.8.5
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/semver@7.8.5
Constraints:
  - executionContext: node
Required runtime conditions:
  - ecosystem: npm
  - language: javascript
  - moduleSystem: cjs
  - packageManager: npm@11.8.0
  - runtime: node@24.13.1

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:sha256:71c4f13d46902589bca929e39ec1a10c2693880616b2fca22ea055f62b3cdbe3","constraints":{"executionContext":"node"},"contract":["semver.valid validates semantic version strings and rejects invalid or incomplete versions","semver.clean strips whitespace and leading 'v' or '=' prefixes from version strings","semver.satisfies evaluates caret, tilde, and comparison ranges with prerelease options","semver.gt, semver.lt, and semver.eq evaluate version precedence and equivalence across major, minor, and patch levels","semver.inc increments versions across release types and semver.diff identifies release differences","semver.coerce extracts and coerces valid SemVer versions from loose strings","semver.minVersion and semver.maxSatisfying resolve boundary versions for ranges"],"goal":"verify pkg:npm/semver@7.8.5","kind":"HOW","packages":["pkg:npm/semver@7.8.5"],"schemaVersion":1,"symbols":["semver.valid","semver.clean","semver.satisfies","semver.gt","semver.lt","semver.eq","semver.inc","semver.diff","semver.coerce","semver.minVersion","semver.maxSatisfying"]},"contractCommand":["node","test/contract.mjs"],"environment":{"arch":"x64","ecosystem":"npm","executionContext":"node","language":"javascript","os":"windows","osVersionBucket":"11","packageManager":"npm","schemaVersion":1},"license":"MIT-0","packages":["pkg:npm/semver@7.8.5"],"schemaVersion":1,"symbols":["semver.valid","semver.clean","semver.satisfies","semver.gt","semver.lt","semver.eq","semver.inc","semver.diff","semver.coerce","semver.minVersion","semver.maxSatisfying"],"verifierAdapter":"node-typescript@1"}

{
  "name": "sample-semver",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "sample-semver",
      "version": "1.0.0",
      "dependencies": {
        "semver": "7.8.5"
      }
    },
    "node_modules/semver": {
      "version": "7.8.5",
      "resolved": "https://registry.npmjs.org/semver/-/semver-7.8.5.tgz",
      "integrity": "sha512-Y7/KDsb8LjooZpwaqGyulO6DQlksgCncchHGk+sZIY4SBvUocMBEFH5Ur1fI4dV+Jvl0w6cjvucaIi40puRioA==",
      "license": "ISC",
      "bin": {
        "semver": "bin/semver.js"
      },
      "engines": {
        "node": ">=10"
      }
    }
  }
}

{
  "name": "sample-semver",
  "version": "1.0.0",
  "type": "module",
  "dependencies": {
    "semver": "7.8.5"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify pkg:npm/semver@7.8.5",
  "kind": "HOW",
  "packages": [
    "pkg:npm/semver@7.8.5"
  ],
  "constraints": {
    "executionContext": "node"
  },
  "runtimeConditions": {
    "ecosystem": "npm",
    "language": "javascript",
    "moduleSystem": "cjs",
    "packageManager": "npm@11.8.0",
    "runtime": "node@24.13.1"
  }
}

import assert from 'node:assert/strict';
import semver from 'semver';

// Contract 1: semver.valid validates semantic version strings and rejects invalid or incomplete versions
{
  assert.strictEqual(semver.valid('1.2.3'), '1.2.3');
  assert.strictEqual(semver.valid('v1.2.3'), '1.2.3');
  assert.strictEqual(semver.valid('1.2.3-alpha.1'), '1.2.3-alpha.1');
  assert.strictEqual(semver.valid('1.2.3+build.42'), '1.2.3');
  assert.strictEqual(semver.valid('not-a-version'), null);
  assert.strictEqual(semver.valid('1.2'), null);
  assert.strictEqual(semver.valid(''), null);
}

// Contract 2: semver.clean strips whitespace and leading 'v' or '=' prefixes from version strings
{
  assert.strictEqual(semver.clean('  =v1.2.3   '), '1.2.3');
  assert.strictEqual(semver.clean('  1.2.3  '), '1.2.3');
  assert.strictEqual(semver.clean(' = 1.2.3 '), '1.2.3');
  assert.strictEqual(semver.clean('~1.2.3'), null);
  assert.strictEqual(semver.clean('^1.2.3'), null);
}

// Contract 3: semver.satisfies evaluates caret, tilde, and comparison ranges with prerelease options
{
  assert.strictEqual(semver.satisfies('1.2.3', '^1.2.0'), true);
  assert.strictEqual(semver.satisfies('1.3.0', '^1.2.0'), true);
  assert.strictEqual(semver.satisfies('2.0.0', '^1.2.0'), false);
  assert.strictEqual(semver.satisfies('1.2.4', '~1.2.0'), true);
  assert.strictEqual(semver.satisfies('1.3.0', '~1.2.0'), false);
  assert.strictEqual(semver.satisfies('1.2.3', '>=1.0.0 <2.0.0'), true);
  // Prereleases are excluded by default unless includePrerelease is set
  assert.strictEqual(semver.satisfies('1.2.4-alpha.1', '^1.2.0'), false);
  assert.strictEqual(semver.satisfies('1.2.4-alpha.1', '^1.2.0', { includePrerelease: true }), true);
}

// Contract 4: semver.gt, semver.lt, and semver.eq evaluate version precedence and equivalence across major, minor, and patch levels
{
  assert.strictEqual(semver.gt('1.10.0', '1.2.0'), true);
  assert.strictEqual(semver.lt('1.2.0', '1.10.0'), true);
  assert.strictEqual(semver.eq('1.2.3', 'v1.2.3'), true);
  assert.strictEqual(semver.gt('1.2.3', '1.2.3-alpha.1'), true);
  assert.strictEqual(semver.lt('1.2.3-alpha.1', '1.2.3-beta.1'), true);
  assert.strictEqual(semver.eq('1.2.3-alpha', '1.2.3-alpha'), true);
}

// Contract 5: semver.inc increments versions across release types and semver.diff identifies release differences
{
  assert.strictEqual(semver.inc('1.2.3', 'major'), '2.0.0');
  assert.strictEqual(semver.inc('1.2.3', 'minor'), '1.3.0');
  assert.strictEqual(semver.inc('1.2.3', 'patch'), '1.2.4');
  assert.strictEqual(semver.inc('1.2.3', 'prerelease', 'alpha'), '1.2.4-alpha.0');
  assert.strictEqual(semver.diff('1.2.3', '2.0.0'), 'major');
  assert.strictEqual(semver.diff('1.2.3', '1.3.0'), 'minor');
  assert.strictEqual(semver.diff('1.2.3', '1.2.4'), 'patch');
  assert.strictEqual(semver.diff('1.2.3', '1.2.3'), null);
}

// Contract 6: semver.coerce extracts and coerces valid SemVer versions from loose strings
{
  const coerced1 = semver.coerce('v2');
  assert.strictEqual(coerced1 !== null, true);
  assert.strictEqual(coerced1.version, '2.0.0');

  const coerced2 = semver.coerce('42.6.7.9.3-alpha');
  assert.strictEqual(coerced2 !== null, true);
  assert.strictEqual(coerced2.version, '42.6.7');

  const coerced3 = semver.coerce('no-version-here');
  assert.strictEqual(coerced3, null);
}

// Contract 7: semver.minVersion and semver.maxSatisfying resolve boundary versions for ranges
{
  const minV1 = semver.minVersion('^1.2.3');
  assert.strictEqual(minV1 !== null, true);
  assert.strictEqual(minV1.version, '1.2.3');

  const minV2 = semver.minVersion('>=2.5.0 <3.0.0');
  assert.strictEqual(minV2 !== null, true);
  assert.strictEqual(minV2.version, '2.5.0');

  const versions = ['1.0.0', '1.1.0', '1.2.0', '1.3.0', '2.0.0'];
  assert.strictEqual(semver.maxSatisfying(versions, '^1.0.0'), '1.3.0');
  assert.strictEqual(semver.minSatisfying(versions, '^1.1.0'), '1.1.0');
  assert.strictEqual(semver.maxSatisfying(versions, '>=3.0.0'), null);
}

console.log('All semver@7.8.5 contracts verified successfully.');