Updated 3w ago
by MariusYvard
NullToHero
Portable Agent Skills toolkit for Claude Code, Codex, Kimi and Hermes: web design, SEO/GEO, audits and deterministic mobile validation.
36 GitHub stars (36)
+1 in 16 days
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- 23 skills (23 skills found in its SKILL.md files)
- 0 forks (0 forks)
- 3w ago last update (Last updated 3w ago)
Install
Skills CLI
npx skills add MariusYvard/NullToHero
Asks which skills and agents to install. Just one: npx skills add MariusYvard/NullToHero --skill inspect-agent-a11y — add -g for every project.
Claude Code
git clone https://github.com/MariusYvard/NullToHerocp -r "NullToHero/hermes-agent/skills/inspect-agent-a11y" ~/.claude/skills/
Copies the inspect-agent-a11y skill into ~/.claude/skills/ for every project (use .claude/skills/ for one project). Repeat for the other skills listed below.
Plugin
/plugin marketplace add MariusYvard/NullToHero
Run inside Claude Code if the repository ships a plugin marketplace, then pick plugins from /plugin.
Skills can run code on your machine — read the SKILL.md first.
What it does
In the author's own words, from each skill's SKILL.md — showing the first 23 of 39 files.
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inspect-agent-a11y
Sub-agent for the Accessibility dimension of /audit (and /inspect). Evaluates color contrast ratios, visible focus indicators, keyboard operability, ARIA correctness, alt text, form labels, color-only meaning, and reduced-motion handling. Not for target size and interactive states, use inspect-agent-interaction instead; not for colour as a design system, use siteasy-agent-visual.
hermes-agent/skills/inspect-agent-a11y/SKILL.md on GitHub (opens in a new tab) -
inspect-agent-code
Sub-agent for the Front-end Code dimension of /audit (and /inspect). Evaluates semantic HTML and landmarks, valid markup, design-token discipline, forbidden CSS patterns, deterministic motion crimes, and inline-style sprawl. Not for whether the rendered result looks right, use siteasy-agent-visual instead; not for runtime layout breakage, use inspect-agent-layout.
hermes-agent/skills/inspect-agent-code/SKILL.md on GitHub (opens in a new tab) -
inspect-agent-interaction
Sub-agent for the Interaction dimension of /audit (and /inspect). Evaluates target size and spacing, interactive state coverage, action feedback, placeholder misuse, hit-area accuracy, dead clickable regions, and cursor affordance. Not for contrast, ARIA or keyboard operability, use inspect-agent-a11y instead; not for whether a flow makes sense, use siteasy-agent-ux.
hermes-agent/skills/inspect-agent-interaction/SKILL.md on GitHub (opens in a new tab) -
inspect-agent-layout
Sub-agent for the Layout dimension of /audit (and /inspect). Evaluates overflow and clipping, z-index conflicts, horizontal scroll at 375px, CLS sources, responsive breakpoint breakage, viewport meta, and sticky or fixed positioning bugs. Not for the taste of a composition, use siteasy-agent-visual instead; not for load speed, use seo-agent-performance.
hermes-agent/skills/inspect-agent-layout/SKILL.md on GitHub (opens in a new tab) -
seo-agent-content
Sub-agent for the Content quality dimension of /audit (and /seo audit). Evaluates E-E-A-T signals, title tags, meta descriptions, heading structure, keyword usage, readability, thin content, and AI citation readiness. Not for whether the copy reads well as interface writing, use siteasy-agent-content instead; not for whether a claim is defensible, use siteasy-agent-claims.
hermes-agent/skills/seo-agent-content/SKILL.md on GitHub (opens in a new tab) -
seo-agent-geo
Sub-agent for the GEO (Generative Engine Optimization) dimension of /audit (and /seo audit). Evaluates AI crawler access, llms.txt compliance, passage citability, brand authority signals, and platform-specific visibility. Not for classic crawlability and indexing, use seo-agent-technical instead; not for the substance of the text being cited, use seo-agent-content.
hermes-agent/skills/seo-agent-geo/SKILL.md on GitHub (opens in a new tab) -
seo-agent-performance
Sub-agent for the Performance dimension of /audit (and /seo audit). Evaluates page speed signals, image optimization, font loading, render-blocking resources, and Core Web Vitals readiness. Not for layout shift caused by CSS bugs, use inspect-agent-layout instead; not for perceived speed of animation, use siteasy-agent-motion.
hermes-agent/skills/seo-agent-performance/SKILL.md on GitHub (opens in a new tab) -
seo-agent-schema
Sub-agent for the Schema markup dimension of /audit (and /seo audit). Detects existing JSON-LD, validates required and recommended properties, checks for rich result eligibility, and flags critical errors. Not for markup semantics in general, use inspect-agent-code instead; not for the content the markup describes, use seo-agent-content.
hermes-agent/skills/seo-agent-schema/SKILL.md on GitHub (opens in a new tab) -
seo-agent-technical
Sub-agent for the Technical SEO dimension of /audit (and /seo audit). Analyzes crawlability, indexability, Core Web Vitals, HTTPS, robots.txt, sitemaps, mobile-friendliness, JavaScript rendering, and security headers. Not for AI crawler surfaces and citability, use seo-agent-geo instead; not for structured data, use seo-agent-schema.
hermes-agent/skills/seo-agent-technical/SKILL.md on GitHub (opens in a new tab) -
siteasy-agent-claims
Sub-agent for the Claims and credibility dimension of /audit (and /siteasy critique). Red-teams the marketing claims on the page with the Toulmin model: unsupported superlatives, missing or undated evidence, unattributed social proof, and the strongest objection the page leaves unanswered. Not for how the claim is worded, use siteasy-agent-content instead; not for whether search engines can read…
hermes-agent/skills/siteasy-agent-claims/SKILL.md on GitHub (opens in a new tab) -
siteasy-agent-content
Sub-agent for the Content dimension of /audit (and /siteasy). Evaluates microcopy clarity, voice and tone consistency, CTA wording, error and empty-state messaging, label scannability, terminology consistency, i18n readiness, and inclusive plain language. Not for search ranking and keyword fit, use seo-agent-content instead; not for the truth of a marketing claim, use siteasy-agent-claims.
hermes-agent/skills/siteasy-agent-content/SKILL.md on GitHub (opens in a new tab) -
siteasy-agent-memorability
Sub-agent for the Memorability dimension of /audit (and /siteasy). Evaluates point of view, a signature element, distinctive typography, ownable color, surprise and voice, and restraint against template-shaped design. Not for whether the system is internally consistent, use siteasy-agent-visual instead; not for motion as a signature, use siteasy-agent-motion.
hermes-agent/skills/siteasy-agent-memorability/SKILL.md on GitHub (opens in a new tab) -
siteasy-agent-motion
Sub-agent for the Motion dimension of /audit (and /siteasy). Evaluates animation purpose, timing and easing taste, micro-interaction polish, scroll and parallax restraint, perceived performance, choreography, and delight without distraction. Not for reduced-motion compliance as an accessibility failure, use inspect-agent-a11y instead; not for animation code smells, use inspect-agent-code.
hermes-agent/skills/siteasy-agent-motion/SKILL.md on GitHub (opens in a new tab) -
siteasy-agent-ux
Sub-agent for the UX dimension of /audit (and /siteasy). Evaluates information architecture and navigation clarity, user-flow friction, journey continuity, cognitive load, state coverage, above-the-fold prioritization, and pattern consistency. Not for the wording of a control, use siteasy-agent-content instead; not for target size and state coverage as defects, use inspect-agent-interaction.
hermes-agent/skills/siteasy-agent-ux/SKILL.md on GitHub (opens in a new tab) -
siteasy-agent-visual
Sub-agent for the Visual Design dimension of /audit (and /siteasy). Evaluates the typographic system, color system, spacing and rhythm, Gestalt grouping, visual hierarchy, layout composition, and brand alignment. Not for whether the design is distinctive, use siteasy-agent-memorability instead; not for CSS-level token discipline, use inspect-agent-code.
hermes-agent/skills/siteasy-agent-visual/SKILL.md on GitHub (opens in a new tab) -
audit
Use when the user wants a complete, whole-site audit that combines search visibility, front-end defects, and design quality in one pass, the deterministic scan alone, or a design engineering review of code they paste. Runs all 15 specialist sub-agents across SEO, accessibility/interaction/layout/code defects, and UX/visual/motion/content design, then merges them into one scored report with a prio…
null-to-hero/skills/audit/SKILL.md on GitHub (opens in a new tab) -
cms
Use when the user wants to hand a finished site over to the person who owns it, so they can change the words and the pictures without touching the code. Covers: turning hardcoded HTML prose into editable fields, a vendored Decap CMS editor with its own accounts, a Netlify function bridge with a server-side allow-list, a write quota, an in-page preview of the real site, and a publish workflow that…
null-to-hero/skills/cms/SKILL.md on GitHub (opens in a new tab) -
seo
Use when the user wants to audit a website, analyze a page, plan an SEO strategy, fix technical SEO, add schema markup, improve content quality, optimize for AI search engines (GEO, llms.txt, AI crawler access), build local SEO, handle hreflang/i18n, generate sitemaps and robots.txt, optimize images, run programmatic SEO, build competitor comparison pages, cluster keywords, optimize Search Experi…
null-to-hero/skills/seo/SKILL.md on GitHub (opens in a new tab) -
siteasy
Use when the user wants to design, build, plan, critique, polish, simplify, amplify, animate, typeset, adapt, harden, or improve a frontend interface: websites, landing pages, dashboards, product UI, components, forms, onboarding, empty states. Covers UX review and research, information architecture, cognitive load, WCAG 2.2 accessibility, image strategy, form patterns, responsive design and mobi…
null-to-hero/skills/siteasy/SKILL.md on GitHub (opens in a new tab) -
nth-audit
Run one whole-site audit that merges search visibility, front-end defects and design quality into a single scored report with a prioritized action plan. Dispatches fifteen specialist sub-agents over a shared fetch, on top of a deterministic pre-pass. Use for 'audit my whole site' or 'review my site end to end'.
dist/agents/skills/nth-audit/SKILL.md on GitHub (opens in a new tab) -
nth-cms
Hand a finished site to the person who owns it: turn its hardcoded prose into editable fields, vendor an editor with its own accounts, put a server-side allow-list between the browser and the repository, and write the sheet of manual steps. Use for handing a site over, letting a client change their own text and pictures, or adding an admin panel. Not for designing the interface, use siteasy.
dist/agents/skills/nth-cms/SKILL.md on GitHub (opens in a new tab) -
nth-seo
Audit and fix a website for search engines and AI answer engines: full-site audits, page analysis, technical SEO, JSON-LD schema, content quality, GEO and llms.txt, sitemaps, local, hreflang, programmatic, backlinks, ecommerce, client reports. Use for any request mentioning SEO, ranking, Google, schema, robots.txt, keywords or AI search visibility.
dist/agents/skills/nth-seo/SKILL.md on GitHub (opens in a new tab) -
nth-siteasy
Design, build, critique and polish a frontend interface: landing pages, dashboards, product UI, components, forms, onboarding, empty states. Covers UX and information architecture, WCAG 2.2 accessibility, typography, color, spacing, motion and micro-interactions, responsive and mobile ergonomics, UX copy, design systems and design tokens.
dist/agents/skills/nth-siteasy/SKILL.md on GitHub (opens in a new tab)
No skill matches that filter.
Review before you install
A skill is a set of instructions and scripts your agent will follow, and it can run code on your machine. Read the SKILL.md and any scripts first — this listing is not a security review.