picocolors 1.1.1

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/picocolors@1.1.1
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/picocolors@1.1.1

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:sha256:53d714c534c9d567fa2246b74d4244d81338020d7b2d6c716560228e596d8c07","contract":["createColors(true).red formats text with red ANSI escape codes","createColors(true).green formats text with green ANSI escape codes","createColors(true).bold formats text with bold ANSI escape codes","createColors(true).bgBlue formats text with blue background ANSI escape codes","createColors(false) disables color formatting and returns input unchanged"],"goal":"verify pkg:npm/picocolors@1.1.1","kind":"HOW","packages":["pkg:npm/picocolors@1.1.1"],"schemaVersion":1},"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/picocolors@1.1.1"],"schemaVersion":1,"subject":"pkg:npm/picocolors@1.1.1","verifierAdapter":"node-typescript@1"}

import pc from "picocolors";

export function formatMessage(level, message) {
  const colors = pc.createColors(true);
  switch (level) {
    case "error":
      return colors.red(`[ERROR] ${message}`);
    case "warn":
      return colors.yellow(`[WARN] ${message}`);
    case "info":
      return colors.cyan(`[INFO] ${message}`);
    default:
      return colors.green(`[OK] ${message}`);
  }
}

export function formatHeading(title) {
  const colors = pc.createColors(true);
  return colors.bold(colors.underline(title));
}

{
  "name": "sample-picocolors",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "sample-picocolors",
      "version": "1.0.0",
      "dependencies": {
        "picocolors": "1.1.1"
      }
    },
    "node_modules/picocolors": {
      "version": "1.1.1",
      "resolved": "https://registry.npmjs.org/picocolors/-/picocolors-1.1.1.tgz",
      "integrity": "sha512-xceH2snhtb5M9liqDsmEw56le376mTZkEX/jEb/RxNFyegNul7eNslCXP9FDj/Lcu0X8KEyMceP2ntpaHrDEVA==",
      "license": "ISC"
    }
  }
}

{
  "name": "sample-picocolors",
  "version": "1.0.0",
  "private": true,
  "type": "module",
  "dependencies": {
    "picocolors": "1.1.1"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify pkg:npm/picocolors@1.1.1",
  "kind": "HOW",
  "packages": [
    "pkg:npm/picocolors@1.1.1"
  ]
}

import assert from "node:assert/strict";
import pc from "picocolors";

// 1. Verify forced color formatting with createColors(true)
const colors = pc.createColors(true);
assert.equal(colors.isColorSupported, true, "isColorSupported should be true when enabled");

// Color functions produce expected ANSI escape sequences
assert.equal(colors.red("error"), "\x1b[31merror\x1b[39m");
assert.equal(colors.green("ok"), "\x1b[32mok\x1b[39m");
assert.equal(colors.yellow("warning"), "\x1b[33mwarning\x1b[39m");
assert.equal(colors.blue("info"), "\x1b[34minfo\x1b[39m");
assert.equal(colors.magenta("highlight"), "\x1b[35mhighlight\x1b[39m");
assert.equal(colors.cyan("link"), "\x1b[36mlink\x1b[39m");
assert.equal(colors.white("text"), "\x1b[37mtext\x1b[39m");
assert.equal(colors.gray("dimmed"), "\x1b[90mdimmed\x1b[39m");

// Modifiers
assert.equal(colors.bold("bold text"), "\x1b[1mbold text\x1b[22m");
assert.equal(colors.dim("dim text"), "\x1b[2mdim text\x1b[22m");
assert.equal(colors.italic("italic text"), "\x1b[3mitalic text\x1b[23m");
assert.equal(colors.underline("underlined"), "\x1b[4munderlined\x1b[24m");
assert.equal(colors.inverse("inverted"), "\x1b[7minverted\x1b[27m");
assert.equal(colors.strikethrough("strike"), "\x1b[9mstrike\x1b[29m");
assert.equal(colors.reset("reset"), "\x1b[0mreset\x1b[0m");

// Background colors
assert.equal(colors.bgBlack("black"), "\x1b[40mblack\x1b[49m");
assert.equal(colors.bgRed("red"), "\x1b[41mred\x1b[49m");
assert.equal(colors.bgGreen("green"), "\x1b[42mgreen\x1b[49m");
assert.equal(colors.bgYellow("yellow"), "\x1b[43myellow\x1b[49m");
assert.equal(colors.bgBlue("blue"), "\x1b[44mblue\x1b[49m");
assert.equal(colors.bgMagenta("magenta"), "\x1b[45mmagenta\x1b[49m");
assert.equal(colors.bgCyan("cyan"), "\x1b[46mcyan\x1b[49m");
assert.equal(colors.bgWhite("white"), "\x1b[47mwhite\x1b[49m");

// 2. Verify disabled color mode with createColors(false)
const disabled = pc.createColors(false);
assert.equal(disabled.isColorSupported, false, "isColorSupported should be false when disabled");
assert.equal(disabled.red("error"), "error");
assert.equal(disabled.green("ok"), "ok");
assert.equal(disabled.bold("bold text"), "bold text");
assert.equal(disabled.bgBlue("blue"), "blue");

// 3. Verify function nesting
assert.equal(colors.bold(colors.red("alert")), "\x1b[1m\x1b[31malert\x1b[39m\x1b[22m");

console.log("All contract tests passed successfully.");