Files
ai-for-dummies/scripts/audit-ui.mjs
T
Marcos Paulo 9cb1e0d242 fix: make the audit-ui value contract unfakeable
The value baseline was satisfied by the string appearing anywhere in the
built CSS. Task 15e attempt 3 exploited exactly that: it dropped the 880px
and 1050px media queries, then added `--legacy-audit-width-880` and
`--legacy-audit-width-1050`, referenced by nothing, purely to put the
strings back in the sheet. The audit reported success.

Two changes close it:

- Custom-property declarations nothing references via `var()` are stripped
  before the value scan. A declaration nothing reads cannot style anything,
  so it should not be able to satisfy a styling contract.
- A `breakpoints` bucket, scanned from `@media` preludes only, so a
  breakpoint has to be an actual query condition. Baselined to the nine
  breakpoints in the legacy stylesheets; extra ones are allowed, losing one
  is not.

Both were tested against a rebuilt dist with the 880px queries removed:
the dead-token form fails on `sizes`, and the live-but-outside-a-query form
fails on `breakpoints`.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
2026-09-06 08:16:13 +00:00

84 lines
3.7 KiB
JavaScript

import { readFileSync, readdirSync, statSync } from 'node:fs';
import { dirname, join } from 'node:path';
const read = (path) => readFileSync(new URL(`../${path}`, import.meta.url), 'utf8');
const pages = [
'index.html',
'full-guide/index.html',
'summary/index.html',
'models/index.html',
'agents/index.html',
'skills/index.html',
'rules/index.html',
'skills-review/index.html',
'hands-on/starter/index.html',
'hands-on/rules/index.html',
];
const walk = (path) =>
readdirSync(path).flatMap((name) => {
const child = join(path, name);
return statSync(child).isDirectory() ? walk(child) : [child];
});
const definitions = (css) => new Set([...css.matchAll(/(--[\w-]+)\s*:/g)].map(([, name]) => name));
const uses = (css) => new Set([...css.matchAll(/var\((--[\w-]+)/g)].map(([, name]) => name));
const builtCss = walk('dist/_astro')
.filter((path) => path.endsWith('.css'))
.map((path) => readFileSync(path, 'utf8'))
.join('\n');
// A declaration nothing references cannot style anything. Dropping the dead ones
// before the value scan is what stops a lost value from being "restored" with an
// unreferenced token that exists only to put the string back into the sheet.
const referenced = uses(builtCss);
const liveCss = builtCss.replace(/(--[\w-]+)\s*:[^;}]*[;}]/g, (declaration, name) =>
referenced.has(name) ? declaration : '',
);
const colorPattern = /#[0-9a-fA-F]{3,8}\b|(?:rgba?|hsla?)\([^)]*\)/g;
const sizePattern = /\b\d+(?:\.\d+)?(?:px|rem|em|vw|vh)\b/g;
// Only the media prelude, so a breakpoint has to be an actual query condition.
const mediaPreludes = (builtCss.match(/@media[^{]+/g) || []).join('\n');
const builtValues = {
colors: new Set(liveCss.match(colorPattern) || []),
sizes: new Set(liveCss.match(sizePattern) || []),
breakpoints: new Set(mediaPreludes.match(sizePattern) || []),
};
if (!builtCss) throw new Error('Astro build emitted no CSS assets to audit');
// Captured from origin/main after its Astro build. This catches a value that is
// silently changed to a nearby token: source token checks cannot see that drift.
const baselineValues = JSON.parse(read('.agents/snapshots/built-css-values.json'));
for (const page of pages) {
const html = read(page);
if (!html.includes('name="viewport"')) throw new Error(`${page} lacks a viewport declaration`);
if (html.match(/<(script|link)[^>]+(src|href)="https?:[^\"]+"/i))
throw new Error(`${page} has an external runtime dependency`);
}
for (const file of walk('dist').filter((path) => path.endsWith('.css'))) {
const css = readFileSync(file, 'utf8').replace(/\/\*[\s\S]*?\*\//g, '');
if (/@import|src:\s*url\(['"]?https?:|url\(['"]?https?:/i.test(css))
throw new Error(`${file} has an external CSS dependency`);
}
for (const [kind, values] of Object.entries(baselineValues)) {
const missing = values.filter((value) => !builtValues[kind].has(value));
if (missing.length) throw new Error(`built CSS lost ${kind}: ${missing.join(', ')}`);
}
// Legacy fixtures still ship directly. Resolve every var() from the stylesheets
// that page actually links; Astro's tokens cannot mask a broken standalone page.
for (const page of pages) {
const html = read(page);
const linked = [...html.matchAll(/<link[^>]+rel="stylesheet"[^>]+href="([^"]+)"/gi)].map(
([, href]) => href,
);
const styles = linked
.filter((href) => !/^https?:/i.test(href))
.map((href) => read(join(dirname(page), href)));
const defined = new Set(styles.flatMap((css) => [...definitions(css)]));
const unresolved = new Set(
styles.flatMap((css) =>
[...uses(css)].filter((name) => name !== '--score' && !defined.has(name)),
),
);
if (unresolved.size)
throw new Error(`${page} has unresolved CSS variables: ${[...unresolved].join(', ')}`);
}
console.log('responsive UI audit passed');