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Attribution

NullToHero is built on the following open standards, tools and sources of knowledge.

Standards and specifications

Tools and prior work the design skills build on

  • impeccable: design skill, anti-pattern detection CLI and live variant tooling by Paul Bakaus (Copyright 2025-2026 Paul Bakaus), licensed under the Apache License 2.0. https://github.com/pbakaus/impeccable The siteasy skill's command vocabulary, design laws and review methodology are adapted from impeccable, then remapped to the /siteasy and /inspect command sets and extended with SEO, GEO and additional design references. The inspect skill calls the impeccable CLI through npx, and siteasy live integrates with impeccable's live-mode scripts when they are installed. impeccable is Apache 2.0, the same license as NullToHero, so this adaptation is permitted; its attribution notices (including the upstream Anthropic frontend-design skill and ehmo's typecraft-guide-skill) are carried forward in NOTICE as required by Apache 2.0 section 4(d).
  • Playwright: Microsoft, Apache 2.0. https://playwright.dev/
  • Lenis: Darkroom Engineering (formerly Studio Freight), MIT. https://github.com/darkroomengineering/lenis
  • GSAP: GreenSock, standard license. https://gsap.com/
  • ui-ux-pro-max-skill: design-system knowledge base (stack guidelines and design data) by Next Level Builder, licensed under the MIT License. https://github.com/nextlevelbuilder/ui-ux-pro-max-skill The null-to-hero/tools/design-system generator adapts its stack knowledge base and design data. The MIT license text is retained in null-to-hero/tools/design-system/UI-UX-PRO-MAX-LICENSE-MIT.txt and credited in NOTICE.

Data sources referenced in SEO references

Harvested checks, rules and references

The 1.22.0 release adds deterministic checks, inspect rules and references adapted from these open sources. Specifications and facts (HTML nesting rules, ARIA attribute names, HTTP header semantics) are not copyrightable; where prose or data was adapted it is noted and the license is honored.

  • React (MIT, Meta Platforms, Inc.). The invalid-dom-nesting and invalid-aria-attribute checks use React DOM's enumerated WAI-ARIA attribute names and its HTML nesting rules (the WHATWG parsing spec). https://github.com/facebook/react
  • HTML5 Boilerplate and its Apache server configs (MIT, HTML5 Boilerplate). The charset-early, head-meta, compression-enabled, server-fingerprint and header-quality checks, and the head-meta and print-styles references, adapt its head order, favicon and manifest conventions, print stylesheet and server-header guidance. https://github.com/h5bp/html5-boilerplate
  • Front-End-Checklist (MIT, David Dias). The security, robustness, testing, privacy and i18n rules and references adapt its checklist items, rewritten in the house style. https://github.com/thedaviddias/Front-End-Checklist
  • PayloadsAllTheThings (MIT, Swissky). The cors-credentialed-wildcard and open-redirect-param detection heuristics adapt its documented misconfiguration signals; no offensive payloads are included. https://github.com/swisskyrepo/PayloadsAllTheThings
  • design-resources-for-developers (MIT, Brad Traversy). The generators.csv, resources.csv, inspiration.csv and design-systems.csv catalogues and the external-tool remediation lists adapt its curated tool names and URLs. https://github.com/bradtraversy/design-resources-for-developers
  • The Book of Secret Knowledge (MIT, trimstray). The external validator references cite its curated tool list. https://github.com/trimstray/the-book-of-secret-knowledge

Assets fetched at build time

null-to-hero/tools/design-system/scripts/fetch-asset.mjs can retrieve icons, brand marks, fonts and public-domain images from third-party services (Iconify, Simple Icons, Google Fonts, Openverse with its partner museums, DiceBear and Colormind) when a project needs them. Nothing from these services is stored in this repository, so each asset keeps its upstream license, honored in the generated site as described in null-to-hero/skills/siteasy/references/fetch-asset.md.

License

NullToHero itself is licensed under Apache 2.0 (see LICENSE). All third-party content referenced above remains under its respective license. Required attribution notices are reproduced in NOTICE.