@tiptap/extension-underline 3.11.0: config

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 @tiptap/extension-underline.config in pkg:npm/%40tiptap/extension-underline@3.11.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/%40tiptap/extension-underline@3.11.0
Demonstrate these symbols/APIs:
  - @tiptap/extension-underline.config

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:sha256:01eb1d606fe74e46c6f7de9fccf24ae4997b3a05eda38b5d4a209efde82224be","contract":["Underline.config defines the mark name as underline","Underline.config defines addOptions returning default HTMLAttributes","Underline.config defines parseHTML rules matching u tags and underline styles","Underline.config defines renderHTML producing a u element with merged attributes","Underline.config defines addCommands and keyboard shortcuts"],"goal":"verify @tiptap/extension-underline.config in pkg:npm/%40tiptap/extension-underline@3.11.0","kind":"HOW","packages":["pkg:npm/%40tiptap/extension-underline@3.11.0"],"schemaVersion":1,"symbols":["@tiptap/extension-underline.config"]},"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/%40tiptap/extension-underline@3.11.0"],"schemaVersion":1,"subject":"pkg:npm/%40tiptap/extension-underline@3.11.0","symbols":["@tiptap/extension-underline.config"],"verifierAdapter":"node-typescript@1"}

{
  "name": "sample",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "sample",
      "version": "1.0.0",
      "license": "MIT-0",
      "dependencies": {
        "@tiptap/core": "3.11.0",
        "@tiptap/extension-underline": "3.11.0"
      }
    },
    "node_modules/@tiptap/core": {
      "version": "3.11.0",
      "resolved": "https://registry.npmjs.org/@tiptap/core/-/core-3.11.0.tgz",
      "integrity": "sha512-kmS7ZVpHm1EMnW1Wmft9H5ZLM7E0G0NGBx+aGEHGDcNxZBXD2ZUa76CuWjIhOGpwsPbELp684ZdpF2JWoNi4Dg==",
      "license": "MIT",
      "funding": {
        "type": "github",
        "url": "https://github.com/sponsors/ueberdosis"
      },
      "peerDependencies": {
        "@tiptap/pm": "^3.11.0"
      }
    },
    "node_modules/@tiptap/extension-underline": {
      "version": "3.11.0",
      "resolved": "https://registry.npmjs.org/@tiptap/extension-underline/-/extension-underline-3.11.0.tgz",
      "integrity": "sha512-D3PsS/84RlQKFjd5eerMIUioC0mNh4yy1RRV/WbXx6ugu+6T+0hT42gNk9Ap8pDsVQZCk0SHfDyBEUFC2KOwKw==",
      "license": "MIT",
      "funding": {
        "type": "github",
        "url": "https://github.com/sponsors/ueberdosis"
      },
      "peerDependencies": {
        "@tiptap/core": "^3.11.0"
      }
    },
    "node_modules/@tiptap/pm": {
      "version": "3.31.3",
      "resolved": "https://registry.npmjs.org/@tiptap/pm/-/pm-3.31.3.tgz",
      "integrity": "sha512-sZime0SWsz/k62W2WvHx5Ig7G2h7kVhrrmnqy+wEgIHfDwEfOlelRjaWCiBCFlF7dxGUntJusCh9FxlLhni0Ag==",
      "license": "MIT",
      "peer": true,
      "dependencies": {
        "prosemirror-changeset": "^2.4.1",
        "prosemirror-commands": "^1.7.1",
        "prosemirror-dropcursor": "^1.8.2",
        "prosemirror-gapcursor": "^1.4.1",
        "prosemirror-history": "^1.5.0",
        "prosemirror-inputrules": "^1.5.1",
        "prosemirror-keymap": "^1.2.3",
        "prosemirror-model": "^1.25.11",
        "prosemirror-schema-list": "^1.5.1",
        "prosemirror-state": "^1.4.4",
        "prosemirror-tables": "^1.8.5",
        "prosemirror-transform": "^1.12.0",
        "prosemirror-view": "^1.42.3"
      },
      "funding": {
        "type": "github",
        "url": "https://github.com/sponsors/ueberdosis"
      }
    },
    "node_modules/orderedmap": {
      "version": "2.1.1",
      "resolved": "https://registry.npmjs.org/orderedmap/-/orderedmap-2.1.1.tgz",
      "integrity": "sha512-TvAWxi0nDe1j/rtMcWcIj94+Ffe6n7zhow33h40SKxmsmozs6dz/e+EajymfoFcHd7sxNn8yHM8839uixMOV6g==",
      "license": "MIT",
      "peer": true
    },
    "node_modules/prosemirror-changeset": {
      "version": "2.4.3",
      "resolved": "https://registry.npmjs.org/prosemirror-changeset/-/prosemirror-changeset-2.4.3.tgz",
      "integrity": "sha512-J8jqUZ1xybXKY44v3K0c8m8ZTIqJPVT34t2UVyxv4VEWoNd5C9t5Y52GNuMriRJ3IpNxOSE2R60vN4qBrTMcyQ==",
      "license": "MIT",
      "peer": true,
      "dependencies": {
        "prosemirror-transform": "^1.0.0"
      }
    },
    "node_modules/prosemirror-commands": {
      "version": "1.7.2",
      "resolved": "https://registry.npmjs.org/prosemirror-commands/-/prosemirror-commands-1.7.2.tgz",
      "integrity": "sha512-q6Q6szxqdu9Xd6EcdKsqXghu5nQdZTpB4Q9yd04WRc7/jt763e/rT60Owh0L1GYY+T46o5rD+9lEN36dZS43tw==",
      "license": "MIT",
      "peer": true,
      "dependencies": {
        "prosemirror-model": "^1.0.0",
        "prosemirror-state": "^1.0.0",
        "prosemirror-transform": "^1.10.2"
      }
    },
    "node_modules/prosemirror-dropcursor": {
      "version": "1.8.3",
      "resolved": "https://registry.npmjs.org/prosemirror-dropcursor/-/prosemirror-dropcursor-1.8.3.tgz",
      "integrity": "sha512-FoYbsJR8gK+DGlqhNoE29Loa38eIZPzQRIb1VMaDNBoo4OLP6vVof/jR8qFY/6XvUd6Dhug8MDCHl2a/h8RTfQ==",
      "license": "MIT",
      "peer": true,
      "dependencies": {
        "prosemirror-state": "^1.0.0",
        "prosemirror-transform": "^1.1.0",
        "prosemirror-view": "^1.1.0"
      }
    },
    "node_modules/prosemirror-gapcursor": {
      "version": "1.4.1",
      "resolved": "https://registry.npmjs.org/prosemirror-gapcursor/-/prosemirror-gapcursor-1.4.1.tgz",
      "integrity": "sha512-pMdYaEnjNMSwl11yjEGtgTmLkR08m/Vl+Jj443167p9eB3HVQKhYCc4gmHVDsLPODfZfjr/MmirsdyZziXbQKw==",
      "license": "MIT",
      "peer": true,
      "dependencies": {
        "prosemirror-keymap": "^1.0.0",
        "prosemirror-model": "^1.0.0",
        "prosemirror-state": "^1.0.0",
        "prosemirror-view": "^1.0.0"
      }
    },
    "node_modules/prosemirror-history": {
      "version": "1.5.0",
      "resolved": "https://registry.npmjs.org/prosemirror-history/-/prosemirror-history-1.5.0.tgz",
      "integrity": "sha512-zlzTiH01eKA55UAf1MEjtssJeHnGxO0j4K4Dpx+gnmX9n+SHNlDqI2oO1Kv1iPN5B1dm5fsljCfqKF9nFL6HRg==",
      "license": "MIT",
      "peer": true,
      "dependencies": {
        "prosemirror-state": "^1.2.2",
        "prosemirror-transform": "^1.0.0",
        "prosemirror-view": "^1.31.0",
        "rope-sequence": "^1.3.0"
      }
    },
    "node_modules/prosemirror-inputrules": {
      "version": "1.5.1",
      "resolved": "https://registry.npmjs.org/prosemirror-inputrules/-/prosemirror-inputrules-1.5.1.tgz",
      "integrity": "sha512-7wj4uMjKaXWAQ1CDgxNzNtR9AlsuwzHfdFH1ygEHA2KHF2DOEaXl1CJfNPAKCg9qNEh4rum975QLaCiQPyY6Fw==",
      "license": "MIT",
      "peer": true,
      "dependencies": {
        "prosemirror-state": "^1.0.0",
        "prosemirror-transform": "^1.0.0"
      }
    },
    "node_modules/prosemirror-keymap": {
      "version": "1.2.3",
      "resolved": "https://registry.npmjs.org/prosemirror-keymap/-/prosemirror-keymap-1.2.3.tgz",
      "integrity": "sha512-4HucRlpiLd1IPQQXNqeo81BGtkY8Ai5smHhKW9jjPKRc2wQIxksg7Hl1tTI2IfT2B/LgX6bfYvXxEpJl7aKYKw==",
      "license": "MIT",
      "peer": true,
      "dependencies": {
        "prosemirror-state": "^1.0.0",
        "w3c-keyname": "^2.2.0"
      }
    },
    "node_modules/prosemirror-model": {
      "version": "1.25.11",
      "resolved": "https://registry.npmjs.org/prosemirror-model/-/prosemirror-model-1.25.11.tgz",
      "integrity": "sha512-QWg9RhnpLlogAmp3p96uEFrE5txQpFynd4vhBAELkwgOCWQs/X0yCzB3/hrHqiPwf91RG5KyWq6553zs9JqIOQ==",
      "license": "MIT",
      "peer": true,
      "dependencies": {
        "orderedmap": "^2.0.0"
      }
    },
    "node_modules/prosemirror-schema-list": {
      "version": "1.5.1",
      "resolved": "https://registry.npmjs.org/prosemirror-schema-list/-/prosemirror-schema-list-1.5.1.tgz",
      "integrity": "sha512-927lFx/uwyQaGwJxLWCZRkjXG0p48KpMj6ueoYiu4JX05GGuGcgzAy62dfiV8eFZftgyBUvLx76RsMe20fJl+Q==",
      "license": "MIT",
      "peer": true,
      "dependencies": {
        "prosemirror-model": "^1.0.0",
        "prosemirror-state": "^1.0.0",
        "prosemirror-transform": "^1.7.3"
      }
    },
    "node_modules/prosemirror-state": {
      "version": "1.4.4",
      "resolved": "https://registry.npmjs.org/prosemirror-state/-/prosemirror-state-1.4.4.tgz",
      "integrity": "sha512-6jiYHH2CIGbCfnxdHbXZ12gySFY/fz/ulZE333G6bPqIZ4F+TXo9ifiR86nAHpWnfoNjOb3o5ESi7J8Uz1jXHw==",
      "license": "MIT",
      "peer": true,
      "dependencies": {
        "prosemirror-model": "^1.0.0",
        "prosemirror-transform": "^1.0.0",
        "prosemirror-view": "^1.27.0"
      }
    },
    "node_modules/prosemirror-tables": {
      "version": "1.8.5",
      "resolved": "https://registry.npmjs.org/prosemirror-tables/-/prosemirror-tables-1.8.5.tgz",
      "integrity": "sha512-V/0cDCsHKHe/tfWkeCmthNUcEp1IVO3p6vwN8XtwE9PZQLAZJigbw3QoraAdfJPir4NKJtNvOB8oYGKRl+t0Dw==",
      "license": "MIT",
      "peer": true,
      "dependencies": {
        "prosemirror-keymap": "^1.2.3",
        "prosemirror-model": "^1.25.4",
        "prosemirror-state": "^1.4.4",
        "prosemirror-transform": "^1.10.5",
        "prosemirror-view": "^1.41.4"
      }
    },
    "node_modules/prosemirror-transform": {
      "version": "1.12.1",
      "resolved": "https://registry.npmjs.org/prosemirror-transform/-/prosemirror-transform-1.12.1.tgz",
      "integrity": "sha512-t4F5615FycnCqsX7ShTUs8+jfnwcf46kuFRvSl/3qFx2QTZ4DjgowesLHQXcFP7G//TjesqZG3WtgL7vdyVJyA==",
      "license": "MIT",
      "peer": true,
      "dependencies": {
        "prosemirror-model": "^1.21.0"
      }
    },
    "node_modules/prosemirror-view": {
      "version": "1.42.3",
      "resolved": "https://registry.npmjs.org/prosemirror-view/-/prosemirror-view-1.42.3.tgz",
      "integrity": "sha512-oTN7EtH+CpwxU9NrwEYWd0UZ4JUx7l048l5A2Xppm4p/60isZYLnth9QVQmC3VRIvdrIWCxwZSd+Uz791G31/w==",
      "license": "MIT",
      "peer": true,
      "dependencies": {
        "prosemirror-model": "^1.25.8",
        "prosemirror-state": "^1.0.0",
        "prosemirror-transform": "^1.1.0"
      }
    },
    "node_modules/rope-sequence": {
      "version": "1.3.4",
      "resolved": "https://registry.npmjs.org/rope-sequence/-/rope-sequence-1.3.4.tgz",
      "integrity": "sha512-UT5EDe2cu2E/6O4igUr5PSFs23nvvukicWHx6GnOPlHAiiYbzNuCRQCuiUdHJQcqKalLKlrYJnjY0ySGsXNQXQ==",
      "license": "MIT",
      "peer": true
    },
    "node_modules/w3c-keyname": {
      "version": "2.2.8",
      "resolved": "https://registry.npmjs.org/w3c-keyname/-/w3c-keyname-2.2.8.tgz",
      "integrity": "sha512-dpojBhNsCNN7T82Tm7k26A6G9ML3NkhDsnw9n/eoxSRlVBB4CEtIQ/KTCLI2Fwf3ataSXRhYFkQi3SlnFwPvPQ==",
      "license": "MIT",
      "peer": true
    }
  }
}

{
  "name": "sample",
  "version": "1.0.0",
  "private": true,
  "type": "module",
  "license": "MIT-0",
  "dependencies": {
    "@tiptap/core": "3.11.0",
    "@tiptap/extension-underline": "3.11.0"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify @tiptap/extension-underline.config in pkg:npm/%40tiptap/extension-underline@3.11.0",
  "kind": "HOW",
  "packages": [
    "pkg:npm/%40tiptap/extension-underline@3.11.0"
  ],
  "symbols": [
    "@tiptap/extension-underline.config"
  ]
}

import assert from "node:assert/strict";
import { Underline } from "@tiptap/extension-underline";

// Contract assertion 1: Underline.config defines the mark name as underline
assert.strictEqual(typeof Underline.config, "object");
assert.strictEqual(Underline.config.name, "underline");

// Contract assertion 2: Underline.config defines addOptions returning default HTMLAttributes
assert.strictEqual(typeof Underline.config.addOptions, "function");
const options = Underline.config.addOptions();
assert.deepStrictEqual(options, { HTMLAttributes: {} });

// Contract assertion 3: Underline.config defines parseHTML rules matching u tags and underline styles
assert.strictEqual(typeof Underline.config.parseHTML, "function");
const parseRules = Underline.config.parseHTML();
assert(Array.isArray(parseRules));
assert.strictEqual(parseRules.length, 2);
assert.strictEqual(parseRules[0].tag, "u");
assert.strictEqual(parseRules[1].style, "text-decoration");
assert.strictEqual(parseRules[1].consuming, false);
assert.deepStrictEqual(parseRules[1].getAttrs("underline"), {});
assert.strictEqual(parseRules[1].getAttrs("none"), false);

// Contract assertion 4: Underline.config defines renderHTML producing a u element with merged attributes
assert.strictEqual(typeof Underline.config.renderHTML, "function");
const rendered = Underline.config.renderHTML.call(
  { options: { HTMLAttributes: { class: "custom-u" } } },
  { HTMLAttributes: { id: "test-u" } }
);
assert.deepStrictEqual(rendered, ["u", { class: "custom-u", id: "test-u" }, 0]);

// Contract assertion 5: Underline.config defines addCommands and keyboard shortcuts
assert.strictEqual(typeof Underline.config.addCommands, "function");
const commands = Underline.config.addCommands.call({ name: "underline" });
assert.strictEqual(typeof commands.setUnderline, "function");
assert.strictEqual(typeof commands.toggleUnderline, "function");
assert.strictEqual(typeof commands.unsetUnderline, "function");

let toggled = false;
const shortcuts = Underline.config.addKeyboardShortcuts.call({
  editor: {
    commands: {
      toggleUnderline: () => {
        toggled = true;
        return true;
      },
    },
  },
});
assert.strictEqual(typeof shortcuts["Mod-u"], "function");
assert.strictEqual(typeof shortcuts["Mod-U"], "function");
shortcuts["Mod-u"]();
assert.strictEqual(toggled, true);

console.log("PASS: @tiptap/extension-underline.config contract verified");