--- name: Accessibility Audit slug: accessibility-audit-8 category: Quality description: Accessibility Audit checks web pages for WCAG issues, screen reader support, and keyboard navigation. Use it to find missing alt text, labels, heading structure problems, and broken ARIA references. github: "https://github.com/billy-enrizky/openbrowser-ai/tree/main/plugin/skills/accessibility-audit" language: Python stars: 241 forks: 21 install: "npx degit https://github.com/billy-enrizky/openbrowser-ai/tree/main/plugin/skills/accessibility-audit ~/.claude/skills/accessibility-audit" installs_to: ~/.claude/skills/accessibility-audit source_path: plugin/skills/accessibility-audit/SKILL.md collection_size: 7 category_size: 1418 collection_url: "https://dirskills.com/collections/billy-enrizky/openbrowser-ai" added: 2026-09-02T05:21:49.919Z last_synced: 2026-09-02T05:21:49.919Z canonical_url: "https://dirskills.com/skills/accessibility-audit-8" --- # Accessibility Audit Accessibility Audit checks web pages for WCAG issues, screen reader support, and keyboard navigation. Use it to find missing alt text, labels, heading structure problems, and broken ARIA references. **Install:** ```bash npx degit https://github.com/billy-enrizky/openbrowser-ai/tree/main/plugin/skills/accessibility-audit ~/.claude/skills/accessibility-audit ``` ## README # Accessibility Audit Audit web pages for accessibility issues following WCAG 2.1 guidelines using Python code execution. Checks heading structure, form labels, image alt text, ARIA attributes, landmark regions, and keyboard navigation. All code runs via `openbrowser-ai -c`. The daemon starts automatically and persists variables across calls. All browser functions are async -- use `await`. The CLI daemon also persists cookies and login state in `~/.config/openbrowser/profiles/daemon/storage_state.json`, so authenticated sessions can be reused across later runs. ## Setup Before running, verify openbrowser-ai is installed: ```bash openbrowser-ai --help ``` If not found, install: ```bash # macOS/Linux curl -fsSL https://raw.githubusercontent.com/billy-enrizky/openbrowser-ai/main/install.sh | sh # Windows (PowerShell) irm https://raw.githubusercontent.com/billy-enrizky/openbrowser-ai/main/install.ps1 | iex ``` ## Workflow ### Step 1 -- Navigate and initialize audit ```bash openbrowser-ai -c - <<'EOF' await navigate("https://example.com") state = await browser.get_browser_state_summary() print(f"Auditing: {state.title} ({state.url})") # Store all findings audit = { "url": state.url, "title": state.title, "issues": [], "checks": {} } EOF ``` ### Step 2 -- Check heading structure ```bash openbrowser-ai -c - <<'EOF' headings_result = await evaluate(""" (function(){ const headings = Array.from(document.querySelectorAll("h1,h2,h3,h4,h5,h6")); const issues = []; let prevLevel = 0; const h1Count = headings.filter(h => h.tagName === "H1").length; if (h1Count === 0) issues.push("No h1 element found"); if (h1Count > 1) issues.push("Multiple h1 elements: " + h1Count); headings.forEach(h => { const level = parseInt(h.tagName[1]); if (prevLevel > 0 && level > prevLevel + 1) issues.push("Skipped level: h" + prevLevel + " -> h" + level + " (\"" + h.textContent.trim().substring(0, 50) + "\")"); if (!h.textContent.trim()) issues.push("Empty heading: " + h.tagName); prevLevel = level; }); return { total: headings.length, h1Count, hierarchy: headings.map(h => ({ tag: h.tagName, text: h.textContent.trim().substring(0, 80) })), issues }; })() """) audit["checks"]["headings"] = headings_result for issue in headings_result.get("issues", []): audit["issues"].append({"check": "headings", "wcag": "1.3.1", "issue": issue}) print(f"[HEADINGS] {issue}") if not headings_result.get("issues"): print("[HEADINGS] PASS") EOF ``` ### Step 3 -- Check images for alt text ```bash openbrowser-ai -c - <<'EOF' images_result = await evaluate(""" (function(){ const images = Array.from(document.querySelectorAll("img")); const issues = []; let withAlt = 0, withEmptyAlt = 0, missingAlt = 0; images.forEach(img => { const alt = img.getAttribute("alt"); const src = img.src?.substring(0, 100); if (alt === null) { missingAlt++; issues.push("Missing alt: " + src); } else if (alt === "") { withEmptyAlt++; } else { withAlt++; } }); return { total: images.length, withAlt, withEmptyAlt, missingAlt, issues }; })() """) audit["checks"]["images"] = images_result for issue in images_result.get("issues", []): audit["issues"].append({"check": "images", "wcag": "1.1.1", "issue": issue}) print(f"[IMAGES] {issue}") if not images_result.get("issues"): total = images_result["total"] with_alt = images_result["withAlt"] print(f"[IMAGES] PASS ({total} images, {with_alt} with alt)") EOF ``` ### Step 4 -- Check form labels ```bash openbrowser-ai -c - <<'EOF' forms_result = await evaluate(""" (function(){ const inputs = Array.from(document.querySelectorAll("input:not([type=\"hidden\"]),select,textarea")); const issues = []; inputs.forEach(input => { const id = input.id; const ariaLabel = input.getAttribute("aria-label"); const ariaLabelledBy = input.getAttribute("aria-labelledby"); const title = input.getAttribute("title"); const label = id ? document.querySelector("label[for=\"" + id + "\"]") : null; const parentLabel = input.closest("label"); const hasLabel = label || parentLabel || ariaLabel || ariaLabelledBy || title; if (!hasLabel) { issues.push({ tag: input.tagName, type: input.type || "text", name: input.name || "(none)", placeholder: input.getAttribute("placeholder") || "(none)", issue: "No label or aria-label" }); } }); return { totalInputs: inputs.length, unlabeled: issues.length, issues }; })() """) audit["checks"]["forms"] = forms_result for issue in forms_result.get("issues", []): tag = issue["tag"] name = issue["name"] itype = issue["type"] audit["issues"].append({"check": "forms", "wcag": "1.3.1", "issue": f"Unlabeled {tag} name={name}"}) print(f"[FORMS] Unlabeled: <{tag}> type={itype} name={name}") if not forms_result.get("issues"): total_inputs = forms_result["totalInputs"] print(f"[FORMS] PASS ({total_inputs} inputs, all labeled)") EOF ``` ### Step 5 -- Check ARIA attributes ```bash openbrowser-ai -c - <<'EOF' aria_result = await evaluate(""" (function(){ const issues = []; const ariaElements = document.querySelectorAll("[role],[aria-label],[aria-labelledby],[aria-describedby],[aria-hidden]"); ariaElements.forEach(el => { const ariaLabelledBy = el.getAttribute("aria-labelledby"); const ariaDescribedBy = el.getAttribute("aria-describedby"); if (ariaLabelledBy) { ariaLabelledBy.split(/\s+/).forEach(id => { if (!document.getElementById(id)) issues.push({ element: el.tagName, issue: "aria-labelledby references missing id: " + id }); }); } if (ariaDescribedBy) { ariaDescribedBy.split(/\s+/).forEach(id => { if (!document.getElementById(id)) issues.push({ element: el.tagName, issue: "aria-describedby references missing id: " + id }); }); } if (el.getAttribute("role") === "button" && !el.getAttribute("aria-label") && !el.textContent.trim()) issues.push({ element: el.tagName, issue: "Button role with no accessible name" }); if (el.getAttribute("aria-hidden") === "true" && el.querySelector("a,button,input,select,textarea,[tabindex]")) issues.push({ element: el.tagName, issue: "aria-hidden on element with focusable children" }); }); return { totalAriaElements: ariaElements.length, issues }; })() """) audit["checks"]["aria"] = aria_result for issue in aria_result.get("issues", []): msg = issue["issue"] audit["issues"].append({"check": "aria", "wcag": "4.1.2", "issue": msg}) print(f"[ARIA] {msg}") if not aria_result.get("issues"): total_aria = aria_result["totalAriaElements"] print(f"[ARIA] PASS ({total_aria} ARIA elements)") EOF ``` ### Step 6 -- Check landmark regions ```bash openbrowser-ai -c - <<'EOF' landmarks_result = await evaluate(""" (function(){ const landmarks = { banner: document.querySelectorAll("header,[role=\"banner\"]").length, navigation: document.querySelectorAll("nav,[role=\"navigation\"]").length, main: document.querySelectorAll("main,[role=\"main\"]").length, contentinfo: document.querySelectorAll("footer,[role=\"contentinfo\"]").length, complementary: document.querySelectorAll("aside,[role=\"complementary\"]").length, search: document.querySelectorAll("[role=\"search\"]").length }; const issues = []; if (landmarks.main === 0) issues.push("No main landmark"); if (landmarks.main > 1) issues.push("Multiple main landmarks: " + landmarks.main); if (landmarks.banner === 0) issues.push("No banner/header landmark"); if (landmarks.navigation === 0) issues.push("No navigation landmark"); if (landmarks.contentinfo === 0) issues.push("No footer/contentinfo landmark"); return { landmarks, issues }; })() """) audit["checks"]["landmarks"] = landmarks_result for issue in landmarks_result.get("issues", []): audit["issues"].append({"check": "landmarks", "wcag": "1.3.1", "issue": issue}) print(f"[LANDMARKS] {issue}") if not landmarks_result.get("issues"): print("[LANDMARKS] PASS") EOF ``` ### Step 7 -- Check links and buttons ```bash openbrowser-ai -c - <<'EOF' links_result = await evaluate(""" (function(){ const issues = []; document.querySelectorAll("a").forEach(a => { const name = a.textContent.trim() || a.getAttribute("aria-label") || a.getAttribute("title") || a.querySelector("img[alt]")?.alt; if (!name) issues.push({ tag: "a", href: a.href?.substring(0, 80), issue: "No accessible name" }); else if (["click here", "here", "read more", "more", "link"].includes(name.toLowerCase())) issues.push({ tag: "a", text: name, issue: "Non-descriptive link text" }); }); document.querySelectorAll("button,[role=\"button\"]").forEach(btn => { const name = btn.textContent.trim() || btn.getAttribute("aria-label") || btn.getAttribute("title"); if (!name) issues.push({ tag: btn.tagName, issue: "Button with no accessible name" }); }); return { issues }; })() """) audit["checks"]["links_buttons"] = links_result for issue in links_result.get("issues", []): msg = issue["issue"] audit["issues"].append({"check": "links_buttons", "wcag": "2.4.4", "issue": msg}) print(f"[LINKS/BUTTONS] {msg}") if not links_result.get("issues"): print("[LINKS/BUTTONS] PASS") EOF ``` ### Step 8 -- Check keyboard navigation ```bash openbrowser-ai -c - <<'EOF' keyboard_result = await evaluate(""" (function(){ const focusable = Array.from(document.querySelectorAll("a[href],button,input:not([type=\"hidden\"]),select,textarea,[tabindex]")); const issues = []; const positiveTabindex = focusable.filter(el => parseInt(el.getAttribute("tabindex")) > 0); const negativeTabindex = focusable.filter(el => { const ti = parseInt(el.getAttribute("tabindex")); return ti < 0 && ["A","BUTTON","INPUT","SELECT","TEXTAREA"].includes(el.tagName); }); if (positiveTabindex.length > 0) issues.push("Elements with positive tabindex (disrupts tab order): " + positiveTabindex.length); if (negativeTabindex.length > 0) issues.push("Interactive elements removed from tab order: " + negativeTabindex.length); return { totalFocusable: focusable.length, positiveTabindex: positiveTabindex.length, negativeTabindex: negativeTabindex.length, issues }; })() """) audit["checks"]["keyboard"] = keyboard_result for issue in keyboard_result.get("issues", []): audit["issues"].append({"check": "keyboard", "wcag": "2.4.3", "issue": issue}) print(f"[KEYBOARD] {issue}") if not keyboard_result.get("issues"): total_focusable = keyboard_result["totalFocusable"] print(f"[KEYBOARD] PASS ({total_focusable} focusable elements)") EOF ``` ### Step 9 -- Compile audit report ```bash openbrowser-ai -c - <<'EOF' import json total_issues = len(audit["issues"]) checks_passed = sum(1 for c in audit["checks"].values() if not c.get("issues")) checks_total = len(audit["checks"]) url = audit["url"] title = audit["title"] print(f"\n=== Accessibility Audit Report ===") print(f"URL: {url}") print(f"Title: {title}") print(f"Checks: {checks_passed}/{checks_total} passed") print(f"Total issues: {total_issues}") if total_issues > 0: print(f"\nIssues by WCAG criterion:") by_wcag = {} for issue in audit["issues"]: by_wcag.setdefault(issue["wcag"], []).append(issue) for wcag, issues in sorted(by_wcag.items()): print(f" {wcag}: {len(issues)} issues") for i in issues[:3]: msg = i["issue"] print(f" - {msg}") if len(issues) > 3: print(f" ... and {len(issues) - 3} more") EOF ``` ## WCAG Quick Reference | Check | WCAG Criterion | Level | |-------|---------------|-------| | Images have alt text | 1.1.1 Non-text Content | A | | Heading hierarchy is logical | 1.3.1 Info and Relationships | A | | Form inputs have labels | 1.3.1 Info and Relationships | A | | Link purpose is clear | 2.4.4 Link Purpose (In Context) | A | | Landmark regions present | 1.3.1 Info and Relationships | A | | Focus order is logical | 2.4.3 Focus Order | A | | ARIA attributes valid | 4.1.2 Name, Role, Value | A | ## Tips - Code is piped via stdin using heredoc (`-c - <<'EOF'`), so all Python syntax works without shell escaping issues. - Store results in the `audit` dict -- variables persist between `-c` calls while the daemon is running. - Run audits on multiple pages, not just the homepage. - ARIA misuse is often worse than no ARIA at all. - The heading check catches the most common structural issues. - Missing form labels are the most common form accessibility failure. ## Cleanup This step is **mandatory**. Run it after the task finishes, whether the audit succeeded or failed. Without it, the daemon keeps Chrome running until its 10-minute idle timeout, leaving a stale browser process, a locked profile, and (on macOS/Linux desktop) a visible window. Stop the daemon, then verify it is gone: ```bash openbrowser-ai daemon stop openbrowser-ai daemon status ``` `daemon stop` closes every tab, exits Chrome, flushes saved cookies/login state to the profile, and shuts down the daemon process. `daemon status` should report the daemon is not running. If it still reports running, the daemon is wedged, force-kill it: ```bash pkill -f 'openbrowser.*daemon' || true ``` If your skill invocation can fail mid-workflow (network error, assertion failure, CDP timeout), guarantee cleanup with a shell trap so the browser is never left orphaned: ```bash trap 'openbrowser-ai daemon stop >/dev/null 2>&1 || true' EXIT # ... openbrowser-ai -c calls here ... ``` Do not rely on the idle timeout. Do not call `done()` as a substitute, `done()` only marks the task complete inside the agent loop, it does not close the browser.