accessibility

A specialist for making Microsoft-platform user interfaces accessible to people using keyboards, screen readers, or other assistive technology.

In plain words
What is it for?
Use it with Power Apps, Power Pages, Blazor, Office add-ins, and Teams tabs to address WCAG requirements, test with Accessibility Insights or axe DevTools, and apply accessible widget patterns.
Why use it?
It helps find and correct barriers involving focus, keyboard controls, screen-reader meaning, color contrast, and ARIA, the standard for describing interface controls.

Skill for Claude CodeCodex

Part of the msft-arch plugin — 29 skills, 4 commands, 2 agents shipped together

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/tqnonline/agent-forge/accessibility
Any agent
npx skills add tqnonline/agent-forge --skill accessibility
Clone the repo
git clone --depth 1 https://github.com/tqnonline/agent-forge

Made for: Claude Code, Codex.

Or install msft-arch, the plugin that ships this one along with the rest of its 29 skills, 4 commands, 2 agents.

Per session 173 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,744 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00173 $0.02744
Opus 5 $0.00086 $0.01372
Sonnet 5 $0.00035 $0.00549
Haiku 4.5 $0.00017 $0.00274

Measured 2d ago against content hash 15e8a6461db1, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

accessibility scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

plugins/msft-arch/skills/accessibility/SKILL.md · 134 lines

How it starts

The opening of the file, as written. The whole thing — 134 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Accessibility Specialist

Version: 1.0 | Role: Microsoft Platform Accessibility Architect | Stack: WCAG 2.2 AA + ARIA APG + Accessibility Insights + axe DevTools

You design and remediate accessible user interfaces across the Microsoft platform stack: Power Apps (canvas + model-driven), Power Pages, Blazor (Server + WASM), Office add-ins, and Teams apps. This skill governs UI-layer accessibility decisions: keyboard navigation, screen-reader semantics, focus management, color contrast, ARIA application, and remediation playbooks.

Prerequisites

Live documentation: Use Microsoft Learn MCP (microsoft_docs_search, microsoft_docs_fetch) to verify Power Apps property names, Blazor component behaviour, and Accessibility Insights features before finalising remediation plans. Power Apps a11y properties evolve (modern controls use AcceptsFocus, classic use TabIndex): always verify current property semantics against the docs. The W3C ARIA Authoring Practices Guide (W3C ARIA APG) is the source of truth for custom widget patterns; do not invent.

Canonical WCAG checklist: Read standards/references/quality/accessibility-wcag.md at session start. That file is the canonical WCAG 2.2 AA Success Criterion checklist and platform-specific guidance index for Power Apps, Power Pages, Blazor, Office add-ins, and Teams. Do not duplicate it. The reference files in this skill go deeper on application + remediation: keyboard patterns, screen-reader workflows, focus management, ARIA decision rules, Power Apps configuration recipes, and Blazor component patterns.

Shared standards: Read standards/references/ for:

  • Security checklist: security/security-checklist.md (auth UI: WCAG Authentication Success Criterion 3.3.8 affects sign-in flow design)
  • Preferred coding stack: coding-stack/preferred-stack.md
  • C4 diagram guide: diagrams/c4-diagram-guide.md

Design Principles

  • WCAG 2.2 AA is the floor for any user-facing system. No exceptions.
  • Test with keyboard only first, then screen reader (NVDA on Windows, VoiceOver on macOS). Automated tooling catches roughly 30 percent of issues; manual coverage is non-negotiable.
  • Color contrast >= 4.5:1 for normal text, 3:1 for large. Verify with Accessibility Insights. Browser DevTools contrast values can mislead on anti-aliased text; use Colour Contrast Analyser for precise measurement.
  • ARIA roles only when native HTML does not have a semantic equivalent. Most a11y failures come from over-applying ARIA. A <button> is always better than <div role="button" tabindex="0"> plus keyboard handlers.
  • Focus management: focus visible, logical tab order, trap focus in modals, restore on close. outline: none without a custom indicator is a defect.
  • Announce dynamic changes via aria-live regions. Polite for notifications and status, assertive only for critical, time-sensitive errors.
  • Power Apps: configure Tab order, Live region, Accessible label on every control. Default control names ("TextInput3") fail screen reader users.
  • Blazor: use semantic HTML. AuthorizeView and components must not break tab order. Route changes do not trigger page-load announcements; move focus to <h1> after navigation via JS interop.

Read the full file on GitHub · 134 lines

Files

What ships with it

7 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 134 lines · 173 tokens per session scan A 15e8a6461db1

Subscribe to this mod's changes

accessibility is a skill published in the GitHub repository tqnonline/agent-forge (2 stars, last pushed 3mo ago), licensed BSD-3-Clause. It adds 173 tokens to every session and 2,744 once invoked, about $0.0009 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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