{"slug":"addyosmani-accessibility","name":"accessibility","description":"Audit and improve web accessibility following WCAG 2.2 guidelines. Use when asked to \"improve accessibility\", \"a11y audit\", \"WCAG compliance\", \"screen reader support\", \"keyboard navigation\", or \"make accessible\".","long_description":"---\nname: accessibility\ndescription: Audit and improve web accessibility following WCAG 2.2 guidelines. Use when asked to \"improve accessibility\", \"a11y audit\", \"WCAG compliance\", \"screen reader support\", \"keyboard navigation\", or \"make accessible\".\nlicense: MIT\nmetadata:\n  author: web-quality-skills\n  version: \"2.0\"\n---\n\n# Accessibility (a11y)\n\nComprehensive accessibility guidelines based on WCAG 2.2 and Lighthouse accessibility audits. Goal: make content usable by everyone, including people with disabilities.\n\n## Evidence-led audit workflow\n\nWhen a rendered page is available:\n\n1. Run a live Lighthouse Accessibility audit when that capability is available; with Chrome DevTools MCP, use `lighthouse_audit`. Use mobile navigation mode for a general public page or snapshot mode when reloading would lose authenticated or user-created state.\n2. Use failed audit nodes to localize the relevant component or template instead of searching the whole repository for generic patterns.\n3. Inspect a rendered accessibility-tree snapshot for names, roles, states, landmarks, and heading structure; with Chrome DevTools MCP, use `take_snapshot`. Exercise the affected flow with the keyboard.\n4. Fix the source, then re-run the same audit and manual interaction.\n\nIf the live tools are unavailable, use Lighthouse CLI or axe for automated coverage and complete the same manual checks. Automated tools detect only a subset of accessibility barriers: a score of 100 is not WCAG conformance, and a low score does not replace issue-level evidence.\n\n## WCAG Principles: POUR\n\n| Principle | Description |\n|-----------|-------------|\n| **P**erceivable | Content can be perceived through different senses |\n| **O**perable | Interface can be operated by all users |\n| **U**nderstandable | Content and interface are understandable |\n| **R**obust | Content works with assistive technologies |\n\n## Conformance levels\n\n| Level | Requirement | Target |\n|-------|-------------|--------|\n| **A** | Minimum accessibility | Must pass |\n| **AA** | Standard compliance | Should pass (legal requirement in many jurisdictions) |\n| **AAA** | Enhanced accessibility | Nice to have |\n\n---\n\n## Perceivable\n\n### Text alternatives (1.1)\n\n**Images require alt text:**\n```html\n<!-- ❌ Missing alt -->\n<img src=\"chart.png\">\n\n<!-- ✅ Descriptive alt -->\n<img src=\"chart.png\" alt=\"Bar chart showing 40% increase in Q3 sales\">\n\n<!-- ✅ Decorative image (empty alt) -->\n<img src=\"decorative-border.png\" alt=\"\" role=\"presentation\">\n\n<!-- ✅ Complex image with longer description -->\n<figure>\n  <img src=\"infographic.png\" alt=\"2024 market trends infographic\" \n       aria-describedby=\"infographic-desc\">\n  <figcaption id=\"infographic-desc\">\n    <!-- Detailed description -->\n  </figcaption>\n</figure>\n```\n\n**Icon buttons need accessible names:**\n```html\n<!-- ❌ No accessible name -->\n<button><svg><!-- menu icon --></svg></button>\n\n<!-- ✅ Using aria-label -->\n<button aria-label=\"Open menu\">\n  <svg aria-hidden=\"true\"><!-- menu icon --></svg>\n</button>\n\n<!-- ✅ Using visually hidden text -->\n<button>\n  <svg aria-hidden=\"true\"><!-- menu icon --></svg>\n  <span class=\"visually-hidden\">Open menu</span>\n</button>\n```\n\n**Visually hidden class:**\n```css\n.visually-hidden {\n  position: absolute;\n  width: 1px;\n  height: 1px;\n  padding: 0;\n  margin: -1px;\n  overflow: hidden;\n  clip: rect(0, 0, 0, 0);\n  white-space: nowrap;\n  border: 0;\n}\n```\n\n### Color contrast (1.4.3, 1.4.6)\n\n| Text Size | AA minimum | AAA enhanced |\n|-----------|------------|--------------|\n| Normal text (< 18px / < 14px bold) | 4.5:1 | 7:1 |\n| Large text (≥ 18px / ≥ 14px bold) | 3:1 | 4.5:1 |\n| UI components & graphics | 3:1 | 3:1 |\n\n```css\n/* ❌ Low contrast (2.5:1) */\n.low-contrast {\n  color: #999;\n  background: #fff;\n}\n\n/* ✅ Sufficient contrast (7:1) */\n.high-contrast {\n  color: #333;\n  background: #fff;\n}\n\n/* ✅ Focus states need contrast too (3:1 against background, WCAG 1.4.11) */\n:focus-visible {\n  outline: 2px solid currentColor;\n  outline-offset: 2px;\n}\n```\n\n**Don't rely on color alone:**\n```html\n<!-- ❌ Only color indicates error -->\n<input class=\"error-border\">\n<style>.error-border { border-color: red; }</style>\n\n<!-- ✅ Color + icon + text -->\n<div class=\"field-error\">\n  <input aria-invalid=\"true\" aria-describedby=\"email-error\">\n  <span id=\"email-error\" class=\"error-message\">\n    <svg aria-hidden=\"true\"><!-- error icon --></svg>\n    Please enter a valid email address\n  </span>\n</div>\n```\n\n### Media alternatives (1.2)\n\n```html\n<!-- Video with captions -->\n<video controls>\n  <source src=\"video.mp4\" type=\"video/mp4\">\n  <track kind=\"captions\" src=\"captions.vtt\" srclang=\"en\" label=\"English\" default>\n  <track kind=\"descriptions\" src=\"descriptions.vtt\" srclang=\"en\" label=\"Descriptions\">\n</video>\n\n<!-- Audio with transcript -->\n<audio controls>\n  <source src=\"podcast.mp3\" type=\"audio/mp3\">\n</audio>\n<details>\n  <summary>Transcript</summary>\n  <p>Full transcript text...</p>\n</details>\n```\n\n---\n\n## Operable\n\n### Keyboard accessible (2.1)\n\n**All functionality must be keyboard accessible.** Prefer native interactive elements — `<button>`, `<a href>`, and form controls handle Enter/Space activation, focus, and assistive-tech semantics for free. Only add manual keyboard handling when you cannot use a native element.\n\n```html\n<!-- ❌ Non-interactive element with click only: not focusable, no keyboard activation -->\n<div class=\"card\" onclick=\"handleAction()\">Open</div>\n\n<!-- ✅ Best: use a native button -->\n<button type=\"button\" onclick=\"handleAction()\">Open</button>\n```\n\n```javascript\n// ✅ When you MUST use a non-interactive element (e.g. div with role=\"button\"),\n// make it focusable AND handle keyboard activation. Do NOT add this to a native\n// <button> — Enter/Space already fire click, so you'd double-trigger.\nelement.setAttribute('role', 'button');\nelement.setAttribute('tabindex', '0');\nelement.addEventListener('click', handleAction);\nelement.addEventListener('keydown', (e) => {\n  if (e.key === 'Enter' || e.key === ' ') {\n    e.preventDefault();\n    handleAction();\n  }\n});\n```\n\n**No keyboard traps.** Users must be able to Tab into and out of every component. Use the [modal focus trap pattern](references/A11Y-PATTERNS.md#modal-focus-trap) for dialogs—the native `<dialog>` element handles this automatically.\n\n### Focus visible (2.4.7)\n\n```css\n/* ❌ Never remove focus outlines */\n*:focus { outline: none; }\n\n/* ✅ Use :focus-visible for keyboard-only focus */\n:focus {\n  outline: none;\n}\n\n:focus-visible {\n  outline: 2px solid currentColor; /* inherits text color → already contrast-checked */\n  outline-offset: 2px;\n}\n\n/* ✅ Or pick a brand color and verify ≥3:1 contrast against every background it lands on */\nbutton:focus-visible {\n  box-shadow: 0 0 0 3px rgba(0, 95, 204, 0.5);\n}\n```\n\n### Focus not obscured (2.4.11) — new in 2.2\n\nWhen an element receives keyboard focus, it must not be entirely hidden by other author-created content such as sticky headers, footers, or overlapping panels. At Level AAA (2.4.12), no part of the focused element may be hidden.\n\n```css\n/* ✅ Account for sticky headers when scrolling to focused elements */\n:target {\n  scroll-margin-top: 80px;\n}\n\n/* ✅ Ensure focused items clear fixed/sticky bars */\n:focus {\n  scroll-margin-top: 80px;\n  scroll-margin-bottom: 60px;\n}\n```\n\n### Skip links (2.4.1)\n\nProvide a skip link so keyboard users can bypass repetitive navigation. See the [skip link pattern](references/A11Y-PATTERNS.md#skip-link) for full markup and styles.\n\n### Target size (2.5.8) — new in 2.2\n\nInteractive targets must be at least **24 × 24 CSS pixels** (AA). Exceptions: inline text links, elements where the browser controls the size, and targets where a 24px circle centered on the bounding box does not overlap another target.\n\n```css\n/* ✅ Minimum target size */\nbutton,\n[role=\"button\"],\ninput[type=\"checkbox\"] + label,\ninput[type=\"radio\"] + label {\n  min-width: 24px;\n  min-height: 24px;\n}\n\n/* ✅ Comfortable target size (recommended 44×44) */\n.touch-target {\n  min-width: 44px;\n  min-height: 44px;\n  display: inline-flex;\n  align-items: center;\n  justify-content: center;\n}\n```\n\n### Dragging movements (2.5.7) — new in 2.2\n\nAny action that requires dragging must have a single-pointer alternative (e.g., buttons, inputs). See the [dragging movements pattern](references/A11Y-PATTERNS.md#dragging-movements) for a sortable-list example.\n\n### Timing (2.2)\n\n```javascript\n// Allow users to extend time limits\nfunction showSessionWarning() {\n  const modal = createModal({\n    title: 'Session Expiring',\n    content: 'Your session will expire in 2 minutes.',\n    actions: [\n      { label: 'Extend session', action: extendSession },\n      { label: 'Log out', action: logout }\n    ],\n    timeout: 120000\n  });\n}\n```\n\n### Motion (2.3)\n\n```css\n/* Respect reduced motion preference */\n@media (prefers-reduced-motion: reduce) {\n  *,\n  *::before,\n  *::after {\n    animation-duration: 0.01ms !important;\n    animation-iteration-count: 1 !important;\n    transition-duration: 0.01ms !important;\n    scroll-behavior: auto !important;\n  }\n}\n```\n\n---\n\n## Understandable\n\n### Page language (3.1.1)\n\n```html\n<!-- ❌ No language specified -->\n<html>\n\n<!-- ✅ Language specified -->\n<html lang=\"en\">\n\n<!-- ✅ Language changes within page -->\n<p>The French word for hello is <span lang=\"fr\">bonjour</span>.</p>\n```\n\n### Consistent navigation (3.2.3)\n\n```html\n<!-- Navigation should be consistent across pages -->\n<nav aria-label=\"Main\">\n  <ul>\n    <li><a href=\"/\" aria-current=\"page\">Home</a></li>\n    <li><a href=\"/products\">Products</a></li>\n    <li><a href=\"/about\">About</a></li>\n  </ul>\n</nav>\n```\n\n### Consistent help (3.2.6) — new in 2.2\n\nIf a help mechanism (contact info, chat widget, FAQ link, self-help option) is repeated across multiple pages, it must appear in the **same relative order** each time. Users who rely on consistent placement shouldn't have to hunt for help on every page.\n\n### Form labels (3.3.2)\n\nEvery input needs a programmatically associated label. See the [form labels pattern](references/A11Y-PATTERNS.md#form-labels) for explicit, implicit, and instructional examples.\n\n### Error handling (3.3.1, 3.3.3)\n\nAnnounce errors to screen readers with `role=\"alert\"` or `aria-live`, set `aria-invalid=\"true\"` on invalid fields, and focus the first error on submit. See the [error handling pattern](references/A11Y-PATTERNS.md#error-handling) for full markup and JS.\n\n### Redundant entry (3.3.7) — new in 2.2\n\nDon't force users to re-enter information they already provided in the same session. Auto-populate from earlier steps, or let users select from previously entered values. Exceptions: security re-confirmation and content that has expired.\n\n```html\n<!-- ✅ Auto-fill shipping address from billing -->\n<fieldset>\n  <legend>Shipping address</legend>\n  <label>\n    <input type=\"checkbox\" id=\"same-as-billing\" checked>\n    Same as billing address\n  </label>\n  <!-- Fields auto-populated when checked -->\n</fieldset>\n```\n\n### Accessible authentication (3.3.8) — new in 2.2\n\nLogin flows must not rely on cognitive function tests (e.g., remembering a password, solving a puzzle) unless at least one of:\n- A copy-paste or autofill mechanism is available\n- An alternative method exists (e.g., passkey, SSO, email link)\n- The test uses object recognition or personal content (AA only; AAA removes this exception)\n\n```html\n<!-- ✅ Allow paste in password fields -->\n<input type=\"password\" id=\"password\" autocomplete=\"current-password\">\n\n<!-- ✅ Offer passwordless alternatives -->\n<button type=\"button\">Sign in with passkey</button>\n<button type=\"button\">Email me a login link</button>\n```\n\n---\n\n## Robust\n\n### ARIA usage (4.1.2)\n\n**Prefer native elements:**\n```html\n<!-- ❌ ARIA role on div -->\n<div role=\"button\" tabindex=\"0\">Click me</div>\n\n<!-- ✅ Native button -->\n<button>Click me</button>\n\n<!-- ❌ ARIA checkbox -->\n<div role=\"checkbox\" aria-checked=\"false\">Option</div>\n\n<!-- ✅ Native checkbox -->\n<label><input type=\"checkbox\"> Option</label>\n```\n\n**When ARIA is needed,** use the cor","tagline":"Audit and improve web accessibility following WCAG 2.2 guidelines. Use when asked to \"improve accessibility\", \"a11y audit\", \"WCAG compliance\", \"screen reader support\", \"keyboard navigation\", or \"make accessible\".","category":"security","tags":["agent-skill"],"author":"addyosmani","verified":false,"attribution":{"status":"registry_indexed","statusLabel":"Registry indexed","shortLabel":"REGISTRY INDEXED","sourceLabel":"github fast track","sourceDetail":"addyosmani/web-quality-skills","creatorName":"addyosmani","creatorUrl":"https://github.com/addyosmani","sourceUrl":"https://github.com/addyosmani/web-quality-skills/tree/main/skills/accessibility","indexedBy":"OpenAgentSkill community index","claimUrl":"https://www.openagentskill.com/skills/addyosmani-accessibility#claim-this-skill","claimCta":"Claim this skill","trustNote":"This listing was indexed from public sources and is not marked official until a maintainer claim is approved.","publicNote":"Attribution links to the public repository or creator profile. Creators can claim the listing to update ownership signals."},"stats":{"stars":2732,"forks":249,"verified_installs":0,"successful_runs":0,"total_outcomes":0,"rating":0,"review_count":0,"quality_score":47.16},"quality":{"score":81,"tier":"strong","label":"Strong","summary":"Solid option that is likely worth shortlisting for production workflows.","signals":[{"label":"GitHub stars","value":"2.7K","tone":"positive"},{"label":"Freshness","value":"14d ago","tone":"positive"},{"label":"Install ready","value":"Yes","tone":"positive"},{"label":"License","value":"MIT","tone":"neutral"}],"warnings":[]},"trust":{"version":"trust-score-v5","score":71,"base_score":79,"outcome_confidence":0,"tier":"review","label":"Sandbox only","summary":"Useful candidate with missing or mixed trust signals. Keep it in an isolated workspace until the outcome loop proves task fit.","recommendedAction":"Run only in a sandbox and compare close alternatives before using it for real work.","decision":{"install_policy":"human_review_before_install","auto_install_allowed":false,"human_review_required":true,"sandbox_first":true,"agent_action":"Compare alternatives before installing.","reasoning":["71/100 Trust Score v5","79/100 Trust Score v4 baseline","Needs more real agent outcomes before unattended install","Install path is available","Review before production"],"review_required_when":["The workspace contains production secrets, payments, private customer data, or irreversible actions.","The install command requests shell, network, credential, database, or broad filesystem access.","Outcome evidence is missing, recently failed, or required human review.","Production credentials, payments, or irreversible account changes without explicit human review","Sensitive private data before reviewing repository code, license, and permission surface","Automatic installation in a production workspace"]},"dimensions":[{"id":"github_adoption","label":"GitHub adoption","score":86,"weight":0.13,"status":"pass","detail":"2.7K GitHub stars"},{"id":"repo_activity","label":"Stars/forks activity","score":77,"weight":0.08,"status":"info","detail":"2.7K stars, 249 forks; 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issue activity unavailable in current metadata"},{"status":"pass","label":"Recent maintenance","detail":"14d since push"},{"status":"pass","label":"License clarity","detail":"MIT"},{"status":"pass","label":"README/SKILL.md completeness","detail":"Metadata includes enough usage and workflow context"},{"status":"info","label":"Dependency/runtime risk","detail":"command execution surface, network or browser surface"},{"status":"pass","label":"Install availability","detail":"npx skills add addyosmani/web-quality-skills --skill accessibility"},{"status":"pass","label":"Install command safety","detail":"standard package or runtime install path"},{"status":"fail","label":"Permission surface","detail":"secrets or environment access, shell or command execution"},{"status":"pass","label":"Repository evidence","detail":"https://github.com/addyosmani/web-quality-skills/tree/main/skills/accessibility"},{"status":"pass","label":"Review status","detail":"AI review data available"},{"status":"info","label":"Agent Proven outcomes","detail":"No agent outcome data yet"},{"status":"warn","label":"Ownership","detail":"No approved owner claim yet"},{"status":"pass","label":"OpenAgentSkill usage","detail":"1 views, 0 install copies"},{"status":"info","label":"Agent outcomes","detail":"No agent outcome data yet"}],"strengths":["AI review approved","Install path is available","Repository evidence is available","Recently maintained repository","Meaningful GitHub adoption signal","Install command has no obvious high-risk pattern","Outcome loop is ready but needs first real agent run"],"warnings":["Financial research output is not financial advice; require human review before any live investment decision.","Quality score needs review","Permission surface needs review: secrets or environment access, shell or command execution","Permission surface: secrets or environment access, shell or command execution","No real agent outcome reports yet","Human review required before unattended installation"],"evidence":{"stars":"2.7K GitHub stars","repoActivity":"2.7K stars, 249 forks","lastPushed":"14d since push","license":"MIT","repository":"https://github.com/addyosmani/web-quality-skills/tree/main/skills/accessibility","install":"npx skills add addyosmani/web-quality-skills --skill accessibility","installSafety":"standard package or runtime install path","permissionSurface":"secrets or environment access, shell or command execution","documentation":"Strong README/SKILL.md context","agentOutcomes":"No agent outcome data yet","agentProvenScore":0,"outcomeConfidence":"0%","installPolicy":"human_review_before_install"},"installReadiness":{"ready":true,"command":"npx skills add addyosmani/web-quality-skills --skill accessibility","policy":"human_review_before_install","label":"Human review before install","notes":["Install path is available","Repository evidence is available","License is declared","No Agent Proven outcome evidence yet","14d since push","Financial domain: human review is required before use in a live investment workflow.","Trust Score v5 requires review or sandbox-only use before install."]},"agentCompatibility":["Codex","Claude Code","Cursor","OpenAgentSkill CLI"],"riskSummary":{"level":"medium","label":"Review before production","notes":["Financial research output is not financial advice; require human review before any live investment decision.","Quality score needs review","Permission surface needs review: secrets or environment access, shell or command execution","Permission surface: secrets or environment access, shell or command execution"]},"outcomeEvidence":{"total":0,"successes":0,"failures":0,"notRelevant":0,"successRate":null,"installAttempts":0,"riskBlocked":0,"setupRequired":0,"installSuccessRate":null,"avgOutputQuality":null,"avgTimeToUsefulMs":null,"productionOutcomes":0,"humanReviewRequired":0,"recentSuccessRate":null,"recentFailureRate":null,"uniqueAgents":0,"agentProvenScore":0,"agentProvenLabel":"Needs first agent run","lastOutcomeAt":null,"label":"No agent outcome data yet"},"autoInstall":{"allowed":false,"sandboxRequired":true,"policy":"human_review_before_install","reason":"Compare alternatives before installing."},"outcome_loop":{"version":"openagentskill-agent-outcome-v4","required_after_install":true,"endpoint":"/api/agent/outcome","method":"POST","event_id_source":"feedback.event_id, install_receipt.resolve_event_id, or decision_packet.outcome_feedback.event_id","expected_outcomes":["success","failed","not_relevant","blocked_by_risk","setup_required"],"required_fields":["event_id","skill_slug","task"],"quality_fields":["task_success","output_quality","error_type","human_review_required","used_in_production","workspace","evidence_url","time_to_useful_ms","source_version"],"ranking_inputs_updated":["Trust Score v5 outcome confidence","Agent Proven Score","Resolve ranking task-fit evidence","Skill detail machine-readable metadata","Outcome leaderboard"]},"agent_contract":{"suited_tasks":["security","agent-skill"],"suited_agents":["Codex","Claude Code","Cursor","OpenAgentSkill CLI"],"install_command":"npx skills add addyosmani/web-quality-skills --skill accessibility","trust_score":71,"trust_version":"trust-score-v5","risk_level":"medium","do_not_use_when":["Production credentials, payments, or irreversible account changes without explicit human review","Sensitive private data before reviewing repository code, license, and permission surface","Automatic installation in a production workspace","Autonomous investment, trading, tax, or suitability decisions without a qualified human review"],"before_install":["Read the audit page and machine-readable metadata.","Confirm the install command, license, and permission surface fit the workspace.","Get explicit human approval or choose an alternative before installing."],"after_run":["Report the outcome to /api/agent/outcome using the resolve event id.","Include output_quality, workspace, human_review_required, and evidence_url when available.","Re-resolve before broad production rollout."]},"bestFor":["security","agent-skill"],"doNotUseFor":["Production credentials, payments, or irreversible account changes without explicit human review","Sensitive private data before reviewing repository code, license, and permission surface","Automatic installation in a production workspace","Autonomous investment, trading, tax, or suitability decisions without a qualified human review"],"knownRisks":["Financial research output is not financial advice; require human review before any live investment decision.","Quality score needs review","Permission surface needs review: secrets or environment access, shell or command execution","Permission surface: secrets or environment access, shell or command execution"],"backward_compatible":{"trust_score_v4":{"version":"trust-score-v4","score":79,"tier":"strong","label":"Strong shortlist","summary":"Good trust signals with a few areas worth checking before rollout."}}},"trust_score_v5":{"version":"trust-score-v5","score":71,"base_score":79,"outcome_confidence":0,"tier":"review","label":"Sandbox only","summary":"Useful candidate with missing or mixed trust signals. Keep it in an isolated workspace until the outcome loop proves task fit.","recommendedAction":"Run only in a sandbox and compare close alternatives before using it for real work.","decision":{"install_policy":"human_review_before_install","auto_install_allowed":false,"human_review_required":true,"sandbox_first":true,"agent_action":"Compare alternatives before installing.","reasoning":["71/100 Trust Score v5","79/100 Trust Score v4 baseline","Needs more real agent outcomes before unattended install","Install path is available","Review before production"],"review_required_when":["The workspace contains production secrets, payments, private customer data, or irreversible actions.","The install command requests shell, network, credential, database, or broad filesystem access.","Outcome evidence is missing, recently failed, or required human review.","Production credentials, payments, or irreversible account changes without explicit human review","Sensitive private data before reviewing repository code, license, and permission surface","Automatic installation in a production workspace"]},"dimensions":[{"id":"github_adoption","label":"GitHub adoption","score":86,"weight":0.13,"status":"pass","detail":"2.7K GitHub stars"},{"id":"repo_activity","label":"Stars/forks activity","score":77,"weight":0.08,"status":"info","detail":"2.7K stars, 249 forks; 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Report success only after the skill is installed and a minimal verification passes."}],"handoff_url":"https://www.openagentskill.com/api/skills/addyosmani-accessibility/install","manifest_url":"https://www.openagentskill.com/api/registry/manifest/addyosmani-accessibility"},"trust":{"score":79,"label":"Strong shortlist","version":"trust-score-v4","install_policy":"human_review_before_install","evidence":{"stars":"2.7K GitHub stars","repoActivity":"2.7K stars, 249 forks","lastPushed":"14d since push","license":"MIT","repository":"https://github.com/addyosmani/web-quality-skills/tree/main/skills/accessibility","install":"npx skills add addyosmani/web-quality-skills --skill accessibility","installSafety":"standard package or runtime install path","permissionSurface":"secrets or environment access, shell or command execution","documentation":"Strong README/SKILL.md context","agentOutcomes":"No agent outcome data yet"},"outcome_evidence":{"total":0,"successes":0,"failures":0,"not_relevant":0,"success_rate":null,"recent_success_rate":null,"recent_failure_rate":null,"install_attempts":0,"install_success_rate":null,"risk_blocked":0,"setup_required":0,"avg_output_quality":null,"production_outcomes":0,"last_outcome_at":null,"label":"No agent outcome data yet"},"auto_install":{"allowed":false,"sandbox_required":true,"reason":"Human review or sandbox validation is required before automatic installation."},"best_for":["security","agent-skill"],"known_risks":["Financial research output is not financial advice; require human review before any live investment decision.","Quality score needs review","Permission surface needs review: secrets or environment access, shell or command execution","Permission surface: secrets or environment access, shell or command execution"]},"agent_proven":{"version":"agent-proven-v1","score":0,"tier":"unproven","label":"Needs first agent run","summary":"No agent outcome reports yet. Use Resolve, run one narrow sandbox task, then report the result.","metrics":{"totalOutcomes":0,"successfulOutcomes":0,"failedOutcomes":0,"installAttempts":0,"installSuccessRate":null,"successRate":null,"recentSuccessRate":null,"recentFailureRate":null,"riskBlocked":0,"setupRequired":0,"notRelevant":0,"avgOutputQuality":null,"avgTimeToUsefulMs":null,"productionOutcomes":0,"humanReviewRequired":0,"uniqueAgents":0,"lastOutcomeAt":null},"signals":[],"penalties":["No real agent outcome evidence yet"]},"audit":{"score":84,"risk_level":"needs_review","risk_label":"Needs review","warnings":["Permission surface may require sandboxing","Financial research output is not financial advice; require human review before any live investment decision","Financial research output is not financial advice; require human review before any live investment decision.","Quality score needs review","Permission surface needs review: secrets or environment access, shell or command execution","Permission surface: secrets or environment access, shell or command execution"]},"safety_gate":{"tier":"experimental","label":"Experimental","auto_install_policy":"review","auto_install_allowed":false,"human_review_required":true,"blocked":false,"recommended_action":"Test manually in an isolated workspace and compare against safer alternatives."},"quality":{"score":81,"label":"Strong"},"supply":{"track":"Coding and developer agents","scenario":"GitHub automation","maintenance":"14d since push","risk":"Needs review"},"alternative_skills":[],"do_not_use_when":["teams that need a vendor-supported SLA","high-compliance environments without internal security review","No major risk signals from current metadata","High-risk permission hints: Shell or command execution","Permission surface may require sandboxing","Financial research output is not financial advice; require human review before any live investment decision","Financial research output is not financial advice; require human review before any live investment decision.","Quality score needs review"],"agent_contract":{"task_input":"Use accessibility in an agent workflow","recommended_action":"Test manually in an isolated workspace and compare against safer alternatives.","install_policy":"review","minimum_review_before_use":["Trust: 79/100 Strong shortlist","Audit: 84/100 Needs review","Safety: 52/100 Avoid automatic install","Review repository, license, install command, and permission surface before production use."],"expected_agent_output":{"selected_skill":"addyosmani-accessibility (accessibility)","install_command":"npx skills add addyosmani/web-quality-skills --skill accessibility","risk_summary":"Needs review; Experimental; Review before production","verification_result":"Report the smallest successful task, files touched, warnings, and any missing setup."}},"outcome_feedback":{"endpoint":"https://www.openagentskill.com/api/agent/outcome","method":"POST","requires_resolve_event_id":true,"event_id_source":"Use install_receipt.outcome_feedback.event_id or feedback.event_id returned by /api/agent/resolve for the current task.","expected_outcomes":["success","failed","not_relevant","blocked_by_risk","setup_required"],"payload_template":{"event_id":"<install_receipt.outcome_feedback.event_id or feedback.event_id from /api/agent/resolve>","skill_slug":"addyosmani-accessibility","task":"Use accessibility in an agent workflow","agent":"codex","outcome":"success","install_used":true,"risk_blocked":false,"setup_required":false,"task_success":true,"output_quality":4,"error_type":null,"human_review_required":false,"workspace":"sandbox","time_to_useful_ms":120000,"notes":"Report the smallest successful task, setup friction, files touched, and risk notes."}},"endpoints":{"web":"https://www.openagentskill.com/skills/addyosmani-accessibility","api":"https://www.openagentskill.com/api/agent/skills/addyosmani-accessibility","audit":"https://www.openagentskill.com/skills/addyosmani-accessibility/audit","eval":"https://www.openagentskill.com/api/agent/evals?slug=addyosmani-accessibility&task=Use%20accessibility%20in%20an%20agent%20workflow&max_risk=medium","resolve":"https://www.openagentskill.com/api/agent/resolve?task=Use%20accessibility%20in%20an%20agent%20workflow&agent=codex&max_risk=medium","receipt":"https://www.openagentskill.com/api/agent/receipt?task=Use%20accessibility%20in%20an%20agent%20workflow&agent=codex&max_risk=medium&format=text","install":"https://www.openagentskill.com/api/skills/addyosmani-accessibility/install","manifest":"https://www.openagentskill.com/api/registry/manifest/addyosmani-accessibility"}},"machine_metadata":{"version":"openagentskill-agent-metadata-v2","skill":{"slug":"addyosmani-accessibility","name":"accessibility","description":"Audit and improve web accessibility following WCAG 2.2 guidelines. Use when asked to \"improve accessibility\", \"a11y audit\", \"WCAG compliance\", \"screen reader support\", \"keyboard navigation\", or \"make accessible\".","category":"security","url":"https://www.openagentskill.com/skills/addyosmani-accessibility","repository":"https://github.com/addyosmani/web-quality-skills/tree/main/skills/accessibility","github_repo":"addyosmani/web-quality-skills"},"suited_tasks":["Multimodal media workflows","Claude Code teams","teams that value GitHub adoption signals","Read media metadata","Convert formats","Summarize visual or audio content","Navigate pages","Click and type safely"],"suited_agents":["Codex","Claude Code","Cursor","OpenAgentSkill CLI","Browser agents","CLI"],"install":{"command":"npx skills add addyosmani/web-quality-skills --skill accessibility","ready":true,"targets":[{"id":"openagentskill-cli","label":"CLI","kind":"command","value":"npx --yes https://github.com/Leon-Drq/openagentskill/releases/download/cli-v0.3.0/openagentskill-0.3.0.tgz add addyosmani-accessibility"},{"id":"codex","label":"Codex","kind":"agent-prompt","value":"Install the \"accessibility\" agent skill from https://github.com/addyosmani/web-quality-skills/tree/main/skills/accessibility. Read its SKILL.md or equivalent instructions first, install only the files needed for this workspace, and summarize any required setup before using it. Skill purpose: Audit and improve web accessibility following WCAG 2.2 guidelines. Use when asked to \"improve accessibility\", \"a11y audit\", \"WCAG compliance\", \"screen reader support\", \"keyboard navigation\", or \"make accessible\". After the install attempt, report the result to https://www.openagentskill.com/api/agent/outcome with POST JSON {\"event_id\":\"install_<unique-id>\",\"skill_slug\":\"addyosmani-accessibility\",\"task\":\"Install accessibility\",\"agent\":\"codex\",\"outcome\":\"success\",\"install_used\":true}. Replace event_id with a unique value and outcome with success or failed. Report success only after the skill is installed and a minimal verification passes."},{"id":"claude-code","label":"Claude Code","kind":"agent-prompt","value":"Add \"accessibility\" as a Claude Code skill from https://github.com/addyosmani/web-quality-skills/tree/main/skills/accessibility. Inspect the skill instructions, place the reusable skill files in the appropriate local skills location for this project, and report the activation steps. Skill purpose: Audit and improve web accessibility following WCAG 2.2 guidelines. Use when asked to \"improve accessibility\", \"a11y audit\", \"WCAG compliance\", \"screen reader support\", \"keyboard navigation\", or \"make accessible\". After the install attempt, report the result to https://www.openagentskill.com/api/agent/outcome with POST JSON {\"event_id\":\"install_<unique-id>\",\"skill_slug\":\"addyosmani-accessibility\",\"task\":\"Install accessibility\",\"agent\":\"claude-code\",\"outcome\":\"success\",\"install_used\":true}. Replace event_id with a unique value and outcome with success or failed. Report success only after the skill is installed and a minimal verification passes."},{"id":"cursor","label":"Cursor","kind":"agent-prompt","value":"Turn \"accessibility\" from https://github.com/addyosmani/web-quality-skills/tree/main/skills/accessibility into a reusable Cursor project rule or agent instruction. Preserve the core workflow, adapt paths to this repo, and keep the rule scoped to tasks where it is relevant. Skill purpose: Audit and improve web accessibility following WCAG 2.2 guidelines. Use when asked to \"improve accessibility\", \"a11y audit\", \"WCAG compliance\", \"screen reader support\", \"keyboard navigation\", or \"make accessible\". After the install attempt, report the result to https://www.openagentskill.com/api/agent/outcome with POST JSON {\"event_id\":\"install_<unique-id>\",\"skill_slug\":\"addyosmani-accessibility\",\"task\":\"Install accessibility\",\"agent\":\"cursor\",\"outcome\":\"success\",\"install_used\":true}. Replace event_id with a unique value and outcome with success or failed. Report success only after the skill is installed and a minimal verification passes."}],"handoff_url":"https://www.openagentskill.com/api/skills/addyosmani-accessibility/install","manifest_url":"https://www.openagentskill.com/api/registry/manifest/addyosmani-accessibility"},"trust":{"score":79,"label":"Strong shortlist","version":"trust-score-v4","install_policy":"human_review_before_install","evidence":{"stars":"2.7K GitHub stars","repoActivity":"2.7K stars, 249 forks","lastPushed":"14d since push","license":"MIT","repository":"https://github.com/addyosmani/web-quality-skills/tree/main/skills/accessibility","install":"npx skills add addyosmani/web-quality-skills --skill accessibility","installSafety":"standard package or runtime install path","permissionSurface":"secrets or environment access, shell or command execution","documentation":"Strong README/SKILL.md context","agentOutcomes":"No agent outcome data yet"},"outcome_evidence":{"total":0,"successes":0,"failures":0,"not_relevant":0,"success_rate":null,"recent_success_rate":null,"recent_failure_rate":null,"install_attempts":0,"install_success_rate":null,"risk_blocked":0,"setup_required":0,"avg_output_quality":null,"production_outcomes":0,"last_outcome_at":null,"label":"No agent outcome data yet"},"auto_install":{"allowed":false,"sandbox_required":true,"reason":"Human review or sandbox validation is required before automatic installation."},"best_for":["security","agent-skill"],"known_risks":["Financial research output is not financial advice; require human review before any live investment decision.","Quality score needs review","Permission surface needs review: secrets or environment access, shell or command execution","Permission surface: secrets or environment access, shell or command execution"]},"agent_proven":{"version":"agent-proven-v1","score":0,"tier":"unproven","label":"Needs first agent run","summary":"No agent outcome reports yet. Use Resolve, run one narrow sandbox task, then report the result.","metrics":{"totalOutcomes":0,"successfulOutcomes":0,"failedOutcomes":0,"installAttempts":0,"installSuccessRate":null,"successRate":null,"recentSuccessRate":null,"recentFailureRate":null,"riskBlocked":0,"setupRequired":0,"notRelevant":0,"avgOutputQuality":null,"avgTimeToUsefulMs":null,"productionOutcomes":0,"humanReviewRequired":0,"uniqueAgents":0,"lastOutcomeAt":null},"signals":[],"penalties":["No real agent outcome evidence yet"]},"audit":{"score":84,"risk_level":"needs_review","risk_label":"Needs review","warnings":["Permission surface may require sandboxing","Financial research output is not financial advice; require human review before any live investment decision","Financial research output is not financial advice; require human review before any live investment decision.","Quality score needs review","Permission surface needs review: secrets or environment access, shell or command execution","Permission surface: secrets or environment access, shell or command execution"]},"safety_gate":{"tier":"experimental","label":"Experimental","auto_install_policy":"review","auto_install_allowed":false,"human_review_required":true,"blocked":false,"recommended_action":"Test manually in an isolated workspace and compare against safer alternatives."},"quality":{"score":81,"label":"Strong"},"supply":{"track":"Coding and developer agents","scenario":"GitHub automation","maintenance":"14d since push","risk":"Needs review"},"alternative_skills":[],"do_not_use_when":["teams that need a vendor-supported SLA","high-compliance environments without internal security review","No major risk signals from current metadata","High-risk permission hints: Shell or command execution","Permission surface may require sandboxing","Financial research output is not financial advice; require human review before any live investment decision","Financial research output is not financial advice; require human review before any live investment decision.","Quality score needs review"],"agent_contract":{"task_input":"Use accessibility in an agent workflow","recommended_action":"Test manually in an isolated workspace and compare against safer alternatives.","install_policy":"review","minimum_review_before_use":["Trust: 79/100 Strong shortlist","Audit: 84/100 Needs review","Safety: 52/100 Avoid automatic install","Review repository, license, install command, and permission surface before production use."],"expected_agent_output":{"selected_skill":"addyosmani-accessibility (accessibility)","install_command":"npx skills add addyosmani/web-quality-skills --skill accessibility","risk_summary":"Needs review; Experimental; Review before production","verification_result":"Report the smallest successful task, files touched, warnings, and any missing setup."}},"outcome_feedback":{"endpoint":"https://www.openagentskill.com/api/agent/outcome","method":"POST","requires_resolve_event_id":true,"event_id_source":"Use install_receipt.outcome_feedback.event_id or feedback.event_id returned by /api/agent/resolve for the current task.","expected_outcomes":["success","failed","not_relevant","blocked_by_risk","setup_required"],"payload_template":{"event_id":"<install_receipt.outcome_feedback.event_id or feedback.event_id from /api/agent/resolve>","skill_slug":"addyosmani-accessibility","task":"Use accessibility in an agent workflow","agent":"codex","outcome":"success","install_used":true,"risk_blocked":false,"setup_required":false,"task_success":true,"output_quality":4,"error_type":null,"human_review_required":false,"workspace":"sandbox","time_to_useful_ms":120000,"notes":"Report the smallest successful task, setup friction, files touched, and risk notes."}},"endpoints":{"web":"https://www.openagentskill.com/skills/addyosmani-accessibility","api":"https://www.openagentskill.com/api/agent/skills/addyosmani-accessibility","audit":"https://www.openagentskill.com/skills/addyosmani-accessibility/audit","eval":"https://www.openagentskill.com/api/agent/evals?slug=addyosmani-accessibility&task=Use%20accessibility%20in%20an%20agent%20workflow&max_risk=medium","resolve":"https://www.openagentskill.com/api/agent/resolve?task=Use%20accessibility%20in%20an%20agent%20workflow&agent=codex&max_risk=medium","receipt":"https://www.openagentskill.com/api/agent/receipt?task=Use%20accessibility%20in%20an%20agent%20workflow&agent=codex&max_risk=medium&format=text","install":"https://www.openagentskill.com/api/skills/addyosmani-accessibility/install","manifest":"https://www.openagentskill.com/api/registry/manifest/addyosmani-accessibility"}},"supply_profile":{"track":{"slug":"coding","label":"Coding and developer agents","shortLabel":"Coding","description":"Code review, repo analysis, testing, CI, GitHub, DevOps, and developer workflow skills."},"scenario":{"label":"GitHub automation","description":"I need my agent to triage GitHub issues, review pull requests, and summarize repository changes.","useCases":[{"slug":"multimodal-media","title":"Multimodal media"},{"slug":"browser-automation","title":"Browser automation"},{"slug":"research-agents","title":"Research agents"}]},"applicableAgents":["Claude Code","Browser agents","CLI","Codex","Cursor"],"install":{"ready":true,"command":"npx skills add addyosmani/web-quality-skills --skill accessibility","primaryTarget":"CLI","targetCount":4},"githubQuality":{"stars":2732,"starsLabel":"2.7K","forks":249,"license":"MIT","qualityScore":81,"trustScore":79,"auditScore":84},"maintenance":{"status":"fresh","label":"14d since push","daysSincePush":14,"lastPushedAt":"2026-08-24T21:07:36+00:00"},"risk":{"level":"needs_review","label":"Needs review","requiresReview":true,"notes":["Permission surface may require sandboxing","Financial research output is not financial advice; require human review before any live investment decision","Financial research output is not financial advice; require human review before any live investment decision.","Quality score needs review","Permission surface needs review: secrets or environment access, shell or command execution"]},"coverageTags":["Coding","GitHub automation","security","agent-skill"]},"audit":{"audit_score":84,"risk_level":"needs_review","risk_label":"Needs review","quality_score":81,"trust_score":79,"maintenance_score":100,"security_score":79,"install_score":92,"warnings":["Permission surface may require sandboxing","Financial research output is not financial advice; require human review before any live investment decision","Financial research output is not financial advice; require human review before any live investment decision.","Quality score needs review","Permission surface needs review: secrets or environment access, shell or command execution","Permission surface: secrets or environment access, shell or command execution"]},"quality_signals":{"model":"v2","star_score":24.06,"usage_score":0,"review_score":5.1,"metadata_score":3,"freshness_score":15},"platforms":["Claude Code","Browser agents"],"use_cases":[{"slug":"multimodal-media","title":"Multimodal media","url":"https://www.openagentskill.com/use-cases/multimodal-media"},{"slug":"browser-automation","title":"Browser automation","url":"https://www.openagentskill.com/use-cases/browser-automation"},{"slug":"research-agents","title":"Research agents","url":"https://www.openagentskill.com/use-cases/research-agents"},{"slug":"github-automation","title":"GitHub automation","url":"https://www.openagentskill.com/use-cases/github-automation"}],"stacks":[{"slug":"browser-qa-agent","title":"Browser QA agent","url":"https://www.openagentskill.com/collections/browser-qa-agent"},{"slug":"research-report-agent","title":"Research report agent","url":"https://www.openagentskill.com/collections/research-report-agent"},{"slug":"web-data-pipeline","title":"Web data pipeline","url":"https://www.openagentskill.com/collections/web-data-pipeline"}],"install":"npx skills add addyosmani/web-quality-skills --skill accessibility","install_targets":[{"id":"openagentskill-cli","label":"CLI","title":"OpenAgentSkill CLI","kind":"command","value":"npx --yes https://github.com/Leon-Drq/openagentskill/releases/download/cli-v0.3.0/openagentskill-0.3.0.tgz add addyosmani-accessibility","description":"Resolve policy, run the source installer safely, and report a verified install receipt.","copyLabel":"Copy command"},{"id":"codex","label":"Codex","title":"Codex install prompt","kind":"agent-prompt","value":"Install the \"accessibility\" agent skill from https://github.com/addyosmani/web-quality-skills/tree/main/skills/accessibility. Read its SKILL.md or equivalent instructions first, install only the files needed for this workspace, and summarize any required setup before using it. Skill purpose: Audit and improve web accessibility following WCAG 2.2 guidelines. Use when asked to \"improve accessibility\", \"a11y audit\", \"WCAG compliance\", \"screen reader support\", \"keyboard navigation\", or \"make accessible\". After the install attempt, report the result to https://www.openagentskill.com/api/agent/outcome with POST JSON {\"event_id\":\"install_<unique-id>\",\"skill_slug\":\"addyosmani-accessibility\",\"task\":\"Install accessibility\",\"agent\":\"codex\",\"outcome\":\"success\",\"install_used\":true}. Replace event_id with a unique value and outcome with success or failed. Report success only after the skill is installed and a minimal verification passes.","description":"Give Codex a repo-aware install prompt when the skill is not available through a local CLI.","copyLabel":"Copy prompt"},{"id":"claude-code","label":"Claude Code","title":"Claude Code skill prompt","kind":"agent-prompt","value":"Add \"accessibility\" as a Claude Code skill from https://github.com/addyosmani/web-quality-skills/tree/main/skills/accessibility. Inspect the skill instructions, place the reusable skill files in the appropriate local skills location for this project, and report the activation steps. Skill purpose: Audit and improve web accessibility following WCAG 2.2 guidelines. Use when asked to \"improve accessibility\", \"a11y audit\", \"WCAG compliance\", \"screen reader support\", \"keyboard navigation\", or \"make accessible\". After the install attempt, report the result to https://www.openagentskill.com/api/agent/outcome with POST JSON {\"event_id\":\"install_<unique-id>\",\"skill_slug\":\"addyosmani-accessibility\",\"task\":\"Install accessibility\",\"agent\":\"claude-code\",\"outcome\":\"success\",\"install_used\":true}. Replace event_id with a unique value and outcome with success or failed. Report success only after the skill is installed and a minimal verification passes.","description":"Use this prompt to ask Claude Code to add the skill and explain the local activation steps.","copyLabel":"Copy prompt"},{"id":"cursor","label":"Cursor","title":"Cursor rule prompt","kind":"agent-prompt","value":"Turn \"accessibility\" from https://github.com/addyosmani/web-quality-skills/tree/main/skills/accessibility into a reusable Cursor project rule or agent instruction. Preserve the core workflow, adapt paths to this repo, and keep the rule scoped to tasks where it is relevant. Skill purpose: Audit and improve web accessibility following WCAG 2.2 guidelines. Use when asked to \"improve accessibility\", \"a11y audit\", \"WCAG compliance\", \"screen reader support\", \"keyboard navigation\", or \"make accessible\". After the install attempt, report the result to https://www.openagentskill.com/api/agent/outcome with POST JSON {\"event_id\":\"install_<unique-id>\",\"skill_slug\":\"addyosmani-accessibility\",\"task\":\"Install accessibility\",\"agent\":\"cursor\",\"outcome\":\"success\",\"install_used\":true}. Replace event_id with a unique value and outcome with success or failed. Report success only after the skill is installed and a minimal verification passes.","description":"Use this when installing as Cursor project rules or reusable agent instructions.","copyLabel":"Copy prompt"}],"repository":"https://github.com/addyosmani/web-quality-skills/tree/main/skills/accessibility","github_repo":"addyosmani/web-quality-skills","version":"1.0.0","license":"MIT","urls":{"web":"https://www.openagentskill.com/skills/addyosmani-accessibility","repository":"https://github.com/addyosmani/web-quality-skills/tree/main/skills/accessibility","api":"/api/agent/skills/addyosmani-accessibility","install_api":"/api/skills/addyosmani-accessibility/install"},"meta":{"created_at":"2026-09-02T01:02:18.427103+00:00","updated_at":"2026-09-02T01:02:18.593191+00:00","agent_friendly":true}}