Install Impeccable skill for Codex

.agents/skills/impeccable/scripts/detector/engines/browser/detect-url.mjs

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+import fs from 'node:fs';
+import path from 'node:path';
+import { fileURLToPath } from 'node:url';
+
+import { finding } from '../../findings.mjs';
+import { filterByProviders } from '../../registry/antipatterns.mjs';
+import { profileFindingsAsync, profileStep, profileStepAsync } from '../../profile/profiler.mjs';
+import { captureVisualContrastCandidate } from '../visual/screenshot-contrast.mjs';
+
+async function runVisualContrastFallback(page, serializedGroups, options, profile, target) {
+  if (options?.visualContrast === false) return [];
+  const maxCandidates = Number.isFinite(options?.visualContrastMaxCandidates)
+    ? options.visualContrastMaxCandidates
+    : 12;
+  const scrollOffscreen = options?.visualContrastScrollOffscreen !== false;
+  const existingLowContrastSelectors = new Set(
+    serializedGroups
+      .filter(group => group.findings?.some(f => f.type === 'low-contrast'))
+      .map(group => group.selector)
+      .filter(Boolean)
+  );
+
+  let browserAnalyses = [];
+  const findings = [];
+  if (options?.visualContrastBrowser !== false) {
+    const browserFindings = await profileFindingsAsync(profile, {
+      engine: 'browser',
+      phase: 'visual-contrast',
+      ruleId: 'browser-fallback',
+      target,
+    }, async () => {
+      browserAnalyses = await page.evaluate(async ({ maxCandidates, scrollOffscreen }) => {
+        if (typeof window.impeccableAnalyzeVisualContrast !== 'function') return [];
+        return window.impeccableAnalyzeVisualContrast({ maxCandidates, scrollOffscreen });
+      }, { maxCandidates, scrollOffscreen });
+      return browserAnalyses
+        .filter(result => result.finding && !existingLowContrastSelectors.has(result.selector))
+        .map(result => result.finding);
+    });
+    findings.push(...browserFindings);
+  }
+
+  let candidates = browserAnalyses.length > 0 ? browserAnalyses : [];
+  if (candidates.length === 0) {
+    candidates = await profileStepAsync(profile, {
+      engine: 'browser',
+      phase: 'visual-contrast',
+      ruleId: 'collect-candidates',
+      target,
+    }, () => page.evaluate(({ maxCandidates }) => {
+      if (typeof window.impeccableCollectVisualContrastCandidates !== 'function') return [];
+      return window.impeccableCollectVisualContrastCandidates({ maxCandidates });
+    }, { maxCandidates }));
+  }
+
+  const viewport = options?.viewport || { width: 1280, height: 800 };
+  const browserResolvedSelectors = new Set(
+    browserAnalyses
+      .filter(result => result.status === 'fail' || result.status === 'pass')
+      .map(result => result.selector)
+      .filter(Boolean)
+  );
+  const filtered = candidates.filter(candidate =>
+    !existingLowContrastSelectors.has(candidate.selector) &&
+    !browserResolvedSelectors.has(candidate.selector)
+  );
+  if (options?.visualContrastPixel === false) return findings;
+  for (const candidate of filtered) {
+    const result = await profileFindingsAsync(profile, {
+      engine: 'browser',
+      phase: 'visual-contrast',
+      ruleId: 'pixel-diff',
+      target,
+    }, async () => {
+      const finding = await captureVisualContrastCandidate(page, candidate, viewport);
+      return finding ? [finding] : [];
+    });
+    findings.push(...result);
+  }
+  return findings;
+}
+
+// ---------------------------------------------------------------------------
+// Puppeteer detection (for URLs)
+// ---------------------------------------------------------------------------
+
+async function detectUrl(url, options = {}) {
+  const profile = options?.profile;
+  const waitUntil = options?.waitUntil || 'networkidle0';
+  const settleMs = Number.isFinite(options?.settleMs) ? options.settleMs : 0;
+  const viewport = options?.viewport || { width: 1280, height: 800 };
+  const externalBrowser = options?.browser || null;
+  let puppeteer;
+  if (!externalBrowser) {
+    try {
+      puppeteer = await profileStepAsync(profile, {
+        engine: 'browser',
+        phase: 'setup',
+        ruleId: 'import-puppeteer',
+        target: url,
+      }, () => import('puppeteer'));
+    } catch {
+      throw new Error('puppeteer is required for URL scanning. Install: npm install puppeteer');
+    }
+  }
+
+  // Read the browser detection script — reuse it instead of reimplementing
+  const browserScriptPath = path.resolve(
+    path.dirname(fileURLToPath(import.meta.url)),
+    '..',
+    '..',
+    'detect-antipatterns-browser.js'
+  );
+  let browserScript;
+  try {
+    browserScript = profileStep(profile, {
+      engine: 'browser',
+      phase: 'setup',
+      ruleId: 'read-browser-script',
+      target: url,
+    }, () => fs.readFileSync(browserScriptPath, 'utf-8'));
+  } catch {
+    throw new Error(`Browser script not found at ${browserScriptPath}`);
+  }
+
+  // CI runners (GitHub Actions Ubuntu) block unprivileged user namespaces, so
+  // Chrome can't initialize its sandbox there. Disable the sandbox only when
+  // running in CI; local users keep the default hardened launch.
+  const launchArgs = process.env.CI ? ['--no-sandbox', '--disable-setuid-sandbox'] : [];
+  const browser = externalBrowser || await profileStepAsync(profile, {
+    engine: 'browser',
+    phase: 'load',
+    ruleId: 'launch-browser',
+    target: url,
+  }, () => puppeteer.default.launch({ headless: true, args: launchArgs }));
+  const page = await profileStepAsync(profile, {
+    engine: 'browser',
+    phase: 'load',
+    ruleId: 'new-page',
+    target: url,
+  }, () => browser.newPage());
+  let results = [];
+  try {
+    await profileStepAsync(profile, {
+      engine: 'browser',
+      phase: 'load',
+      ruleId: 'set-viewport',
+      target: url,
+    }, () => page.setViewport(viewport));
+    await profileStepAsync(profile, {
+      engine: 'browser',
+      phase: 'load',
+      ruleId: `goto:${waitUntil}`,
+      target: url,
+    }, () => page.goto(url, { waitUntil, timeout: 30000 }));
+    if (settleMs > 0) {
+      await profileStepAsync(profile, {
+        engine: 'browser',
+        phase: 'load',
+        ruleId: 'settle',
+        target: url,
+      }, () => new Promise(resolve => setTimeout(resolve, settleMs)));
+    }
+
+    // Inject the browser detection script and collect results
+    await profileStepAsync(profile, {
+      engine: 'browser',
+      phase: 'scan',
+      ruleId: 'configure-pure-detect',
+      target: url,
+    }, () => page.evaluate(() => {
+      window.__IMPECCABLE_CONFIG__ = {
+        ...(window.__IMPECCABLE_CONFIG__ || {}),
+        autoScan: false,
+      };
+    }));
+    await profileStepAsync(profile, {
+      engine: 'browser',
+      phase: 'scan',
+      ruleId: 'inject-browser-script',
+      target: url,
+    }, () => page.evaluate(browserScript));
+    let serializedGroups = [];
+    results = await profileFindingsAsync(profile, {
+      engine: 'browser',
+      phase: 'scan',
+      ruleId: 'browser-scan',
+      target: url,
+    }, async () => {
+      serializedGroups = await page.evaluate(() => {
+        if (!window.impeccableDetect) return [];
+        return window.impeccableDetect({ decorate: false, serialize: true });
+      });
+      return serializedGroups.flatMap(({ findings }) =>
+        findings.map(f => ({ id: f.type, snippet: f.detail }))
+      );
+    });
+    const visualFindings = await runVisualContrastFallback(page, serializedGroups, options, profile, url);
+    results.push(...visualFindings);
+  } finally {
+    await profileStepAsync(profile, {
+      engine: 'browser',
+      phase: 'load',
+      ruleId: 'close-page',
+      target: url,
+    }, () => page.close().catch(() => {}));
+    if (!externalBrowser) {
+      await profileStepAsync(profile, {
+        engine: 'browser',
+        phase: 'load',
+        ruleId: 'close-browser',
+        target: url,
+      }, () => browser.close());
+    }
+  }
+  return filterByProviders(results.map(f => finding(f.id, url, f.snippet)), options.providers);
+}
+
+async function createBrowserDetector(options = {}) {
+  let puppeteer;
+  try {
+    puppeteer = await import('puppeteer');
+  } catch {
+    throw new Error('puppeteer is required for URL scanning. Install: npm install puppeteer');
+  }
+  const launchArgs = options.launchArgs || (process.env.CI ? ['--no-sandbox', '--disable-setuid-sandbox'] : []);
+  const browser = options.browser || await puppeteer.default.launch({
+    headless: options.headless ?? true,
+    args: launchArgs,
+  });
+  const ownsBrowser = !options.browser;
+  const defaults = {
+    waitUntil: options.waitUntil || 'load',
+    settleMs: Number.isFinite(options.settleMs) ? options.settleMs : 100,
+    viewport: options.viewport || { width: 1280, height: 800 },
+  };
+  return {
+    browser,
+    async detectUrl(url, scanOptions = {}) {
+      return detectUrl(url, {
+        ...defaults,
+        ...scanOptions,
+        browser,
+      });
+    },
+    async close() {
+      if (ownsBrowser) await browser.close().catch(() => {});
+    },
+  };
+}
+
+export { runVisualContrastFallback, detectUrl, createBrowserDetector };