web-artifacts-builder

A toolkit for creating complex, multi-part HTML interfaces with React, Tailwind CSS, and shadcn/ui. React is a JavaScript library for interfaces, while Tailwind CSS and shadcn/ui provide styling and interface components.

In plain words
What is it for?
Use it to build elaborate Claude.ai HTML artifacts with routing, state management, and modern frontend components.
Why use it?
It supports interactive web artifacts that need shared state, multiple screens, navigation, or reusable components.

Skill for Claude CodeCodex

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/mrwillist/pullnexus/web-artifacts-builder
Any agent
npx skills add MRWillisT/PullNexus --skill web-artifacts-builder
Clone the repo
git clone --depth 1 https://github.com/MRWillisT/PullNexus

Made for: Claude Code, Codex.

Per session 64 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 701 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin unknown No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00064 $0.00701
Opus 5 $0.00032 $0.00351
Sonnet 5 $0.00013 $0.00140
Haiku 4.5 $0.00006 $0.00070

Measured 2d ago against content hash 16461f5cff94, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

web-artifacts-builder scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/web-artifacts-builder/SKILL.md · 75 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 75 lines · 64 tokens per session scan A 16461f5cff94

Subscribe to this mod's changes

web-artifacts-builder is a skill published in the GitHub repository MRWillisT/PullNexus (7 stars, last pushed 3mo ago), with no licence file. It adds 64 tokens to every session and 701 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.