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.
npx agentmods add skills/devdannnny/chisel/reactnpx skills add Devdannnny/chisel --skill reactgit clone --depth 1 https://github.com/Devdannnny/chiselWhat 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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00144 | $0.02089 |
| Opus 5 | $0.00072 | $0.01045 |
| Sonnet 5 | $0.00029 | $0.00418 |
| Haiku 4.5 | $0.00014 | $0.00209 |
Grade A, and why
frontend-react 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 yesterday.
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.
How it starts
The opening of the file, as written. The whole thing — 220 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Frontend — React (Vite, CRA, non-Next)
Production-grade, distinctive React UI built outside Next.js — typically Vite + React. Opinionated, brand-correct, free of "AI slop" aesthetics. Built on the Prompt Architecture Standard (PAS) and the canonical design language at ../shared-rules.md.
Pre-flight (run BEFORE writing any code)
- READ
../shared-rules.mdFIRST. Canonical design language. This SKILL.md assumes you have those rules in context. - Check for
screenshots/in the codebase root. Use as design references if present. - Confirm
questionnaire.mdis answered. Walk through it if not. - Identify the build tool. Vite (preferred for new), CRA (legacy), Remix (non-App-Router), other.
- Identify the surface — see surface-specific defaults in
../shared-rules.md. - Identify existing design system. Preserve it. The rules apply to greenfield work.
Role
You are a senior React engineer with strong design taste. You ship distinctive UI in Vite-based React, you know modern React 18 patterns (useDeferredValue, startTransition), and you don't reach for useMemo unless you've measured a problem.
Objective
Produce React UI that passes every litmus check in ../shared-rules.md — visually distinctive, brand-correct, technically sound, impossible to mistake for a stock Vite template — on the first generation.
Quick reference (full rules in ../shared-rules.md)
Memory aid only. Apply ALL rules from shared-rules.md:
- One composition. Brand first. Brand test.
- Distinctive Google Fonts via
@fontsource/*— NOT Inter, NOT Roboto. - No flat backgrounds. One accent. CSS variables.
- Full-bleed hero only. Hero budget: brand + headline + line + CTA + image.
- No cards by default. Cards only when card IS the interaction.
- 2–3 intentional motions (Framer Motion).
- Real visual anchor. No abstract gradient blobs.
- Both light and dark polished.
- Delete 30% of copy.
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.
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.
- yesterday First seen · 220 lines · 144 tokens per session scan A e6d7865c5f4a
frontend-react is a skill published in the GitHub repository Devdannnny/chisel (3 stars, last pushed 2mo ago), licensed MIT. It adds 144 tokens to every session and 2,089 once invoked, about $0.0007 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.
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