A technique used by @funstack/static to ship Claude Code (and other AI agent) skills alongside a library.
When you publish an npm package, you can bundle AI agent skills (e.g. for Claude Code, Cursor, Copilot, etc.) so that consumers of your library get context-aware AI assistance out of the box. This document explains the technique used by the @funstack/static project.
The approach has three parts:
| <!doctype html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="utf-8"> | |
| <title>repro</title> | |
| <style> | |
| #popover1 { | |
| top: 100px; | |
| left: 100px; | |
| width: 100px; |
| // 試合を繰り返して昇格する確率を求める | |
| // ・5勝の貯金を積み上げると昇格 | |
| // ・3敗の借金を積み上げると降格 | |
| // ・借金中に勝利すると今までの借金がチャラになり＋1勝になる | |
| generateCSV(); | |
| function generateCSV() { | |
| const header='1試合の勝率,昇格確率,降格確率,合計'; | |
| let csv = header + '\n'; | |
| for (let p = 0; p <= 100; p ++) { |
| const effects: Map<number, () => void> = new Map(); | |
| let nextEffectId = 1; | |
| /** | |
| * Similar to useEffect, but an effect from another randomly chosen instance of useButterflyEffect is called | |
| * when given deps change. | |
| */ | |
| function useButterflyEffect(effect: () => void, deps: readonly unknown[]) { | |
| useEffect(() => { | |
| const effectId = nextEffectId++; |
| (()=>{ | |
| const svg = document.querySelector('svg.vlmbi.H21Mnd'); | |
| const svg2 = cl(svg); | |
| const paths = svg2.querySelectorAll('path.xH0v4d'); | |
| const cs = [ | |
| 'rgb(218, 220, 224)', | |
| 'rgb(0, 155, 216)', | |
| 'rgb(166, 220, 241)', | |
| 'rgb(241, 176, 180)', | |
| 'rgb(219, 29, 40)', |
| function offsetRange(arr) { | |
| return ( | |
| arr.map(v => [v, v+1]) | |
| .join(",") | |
| .replace(/(,\d+)\1/g, "-") | |
| .replace(/(-+,)\d+/g, (_, s) => "-" + (s.length)) | |
| .replace(/(,\d+),\d+/g, (_, s) => `${s}-1`) | |
| .split(",") | |
| .map((v) => { | |
| const [offset, range] = v.split("-"); |
| Promise.prototype.then = (()=> { | |
| const _then = Promise.prototype.then; | |
| return function(...args) { | |
| _then.call(this, (res) => { | |
| promiseResultMap.set(this, res); | |
| }) | |
| this.then = _then; | |
| return _then.apply(this, args); | |
| } | |
| })(); |
| const use\uffa0std = { | |
| collections: { | |
| get HashMap() { | |
| globalThis.HashMap = class HashMap {}; | |
| return undefined; | |
| } | |
| } | |
| } |
| let fizzbuzz = false; | |
| function* range() { | |
| for (let i=1; i<=100; i++) yield i; | |
| } | |
| async function fizz() { | |
| for (const i of range()) { | |
| if (i % 3 === 0) { | |
| fizzbuzz=true; | |
| process.stdout.write("Fizz"); | |
| } |
