What's on the bench.
Text Quality Reviewer
Non-visual text quality reviewer for web applications. Use when reviewing any page, component, or template for low-quality alt text, aria-labels, or button names. Detects template variables ({0}, {{var}}), code syntax in text attributes (property.alttext), placeholder text as labels, typos in short accessible names, whitespace-only names, and duplicate control labels. Enforces WCAG 1.1.1 (Non-text Content), 4.1.2 (Name, Role, Value), and 2.5.3 (Label in Name). Applies to any web framework or vanilla HTML/CSS/JS.
Testing Coach
Accessibility testing coach for web applications. Use when you need guidance on HOW to test accessibility - screen reader testing with NVDA/VoiceOver/JAWS, keyboard testing workflows, automated testing setup (axe-core, Playwright, Pa11y), browser DevTools accessibility features, and creating accessibility test plans. Does not write product code - teaches and guides testing practices.
Tables Data Specialist
Data table accessibility specialist for web applications. Use when building or reviewing any data table, sortable table, grid, spreadsheet-like interface, comparison table, pricing table, or any tabular data display. Covers proper markup, scope, caption, headers, sortable columns, responsive patterns, and ARIA grid/treegrid roles. Applies to any web framework or vanilla HTML/CSS/JS.
Security Dashboard
GitHub security alerts command center -- triage Dependabot, code scanning, and secret scanning alerts entirely from the editor. Bypasses the color-dependent, focus-trapping security UI that is largely inaccessible to screen readers.
Screen Reader Lab
Interactive screen reader simulation for education and debugging. Parses HTML/JSX and produces step-by-step narration of what a screen reader would announce. Supports reading order, Tab navigation, heading navigation (H key), and form navigation (F key) modes. Not a replacement for real screen reader testing.
Scanner Bridge
Internal helper agent. Invoked by orchestrator agents via Task tool. Internal helper that bridges GitHub Accessibility Scanner CI data with the agent ecosystem. Fetches scanner-created issues, normalizes findings, deduplicates against local scans, and tracks Copilot fix status.
Release Manager
GitHub releases command center -- create, edit, and manage releases and their binary assets entirely from the editor. Bypasses the drag-and-drop asset upload and icon-only controls that are inaccessible to screen readers.
Python Specialist
Python language expert -- debugging, packaging (PyInstaller/Nuitka/cx_Freeze), testing (pytest/unittest), type checking (mypy/pyright), async/concurrency patterns, performance optimization, dependency management, and cross-platform development. Handles everything from tracebacks to production builds.
Projects Manager
GitHub Projects v2 command center -- create, configure, and manage project boards, views, custom fields, iterations, and item workflows entirely from the editor. Bypasses the drag-and-drop UI that is inaccessible to screen reader users.
Powerpoint Accessibility
PowerPoint presentation accessibility specialist. Use when scanning, reviewing, or remediating .pptx files for accessibility. Covers slide titles, alt text, reading order, table headers, hyperlink text, duplicate titles, sections, and media accessibility. Enforces Microsoft Accessibility Checker rules mapped to WCAG 2.1 AA.
Playwright Verifier
Internal helper agent. Invoked by orchestrator agents via Task tool. Fix verification using Playwright — after a fix is applied, navigates to the fixed element, runs a targeted axe-core assertion, and reports PASS/FAIL/REGRESSION. Read-only — never modifies files. Can generate Playwright test code that encodes the verification assertion.
Performance Accessibility
Audits the intersection of web performance and accessibility. Covers lazy loading, skeleton screens, CLS impact on AT, code splitting loading states, and progressive enhancement patterns.
PDF Scan Config
Internal helper agent. Invoked by orchestrator agents via Task tool. PDF accessibility scan configuration manager. Use to create, edit, validate, or explain .a11y-pdf-config.json files that control which PDF accessibility rules are enabled or disabled. Manages three rule layers (PDFUA conformance, PDFBP best practices, PDFQ pipeline), severity filters, and preset profiles.
PDF Accessibility
PDF document accessibility specialist. Use when scanning, reviewing, or remediating PDF files for accessibility. Covers PDF/UA conformance, Matterhorn Protocol checks, tagged structure, alt text, language, bookmarks, forms, reading order, and text extraction. Three rule layers - PDFUA (conformance), PDFBP (best practices), PDFQ (quality/pipeline).
Office Scan Config
Internal helper agent. Invoked by orchestrator agents via Task tool. Office document accessibility scan configuration manager. Use to create, edit, validate, or explain .a11y-office-config.json files that control which accessibility rules are enabled or disabled per Office file type (docx, xlsx, pptx). Manages rule profiles, severity filters, and per-project scan customization.
Office Remediator
Office document accessibility remediator for Word (.docx), Excel (.xlsx), and PowerPoint (.pptx). Generates Python scripts for programmatic fixes via python-docx, openpyxl, and python-pptx, and provides step-by-step Microsoft Office UI instructions for manual fixes.
NVDA Addon Development Specialist
Expert in NVDA screen reader addon development -- architecture, APIs, plugin types (globalPlugins, appModules, synthDrivers, brailleDisplayDrivers), manifest format, event/script handling, NVDAObject overlays, tree interceptors, addon packaging, Add-on Store submission, testing with NVDA, braille table and speech dictionary authoring, and internationalization. Grounded in the official NVDA source code (github.com/nvaccess/nvda) and community development guides.
Notifications Manager
GitHub notifications command center -- read, filter, triage, and manage notifications entirely from the editor. Bypasses the hover-dependent, swipe-gesture notification inbox that is largely inaccessible to screen readers.
Nexus
Your intelligent GitHub command center -- start here. Nexus discovers your repos and organizations, understands what you want to accomplish in plain English, and guides you to the right outcome by orchestrating every other agent. No commands to memorize. Just talk.
Modal Specialist
Modal and dialog specialist for web applications. Use when building or reviewing any modal, dialog, popover, sheet, drawer, confirmation prompt, alert dialog, or overlay that appears above page content. Handles focus trapping, focus return, escape behavior, and screen reader announcements for overlays. Applies to any web framework or vanilla HTML/CSS/JS.
Mobile Accessibility 2
Mobile accessibility specialist for React Native, Expo, iOS (SwiftUI/UIKit), and Android (Jetpack Compose/Views). Audits accessibilityLabel, accessibilityRole, accessibilityHint, touch target sizes, screen reader compatibility, and platform-specific semantics. Use for any React Native or native mobile code review - approximately 60% of web traffic is mobile and most UI accessibility tooling ignores mobile-specific patterns.
Media Accessibility
Video, audio, and streaming media accessibility specialist. Audits captions (WebVTT/SRT), transcripts, audio descriptions, accessible media player controls, live captioning, and WCAG 1.2.x time-based media criteria.
Markdown Scanner
Internal helper agent. Invoked by orchestrator agents via Task tool. Internal helper for scanning a single markdown file for accessibility issues across all 9 domains. Returns structured findings with severity, line numbers, suggested fixes, and auto-fix classification. Invoked by markdown-a11y-assistant via the Task tool - not user-invokable directly.
Markdown Fixer
Internal helper agent. Invoked by orchestrator agents via Task tool. Internal helper for applying accessibility fixes to markdown files. Handles auto-fixable issues (links, headings, emoji remove/translate, em-dashes, tables, Mermaid replacement, ASCII diagram descriptions) and presents human-judgment fixes for approval. Invoked by markdown-a11y-assistant via the Task tool - not user-invokable directly.