accessibility

accessibility is a skill for Claude Code from microsoft/hve-core. It costs 47 tokens per session (9,002 once invoked), scanned A, original, MIT.

A central accessibility guide for checking whether software and websites can be used by people with disabilities. It covers standards such as WCAG 2.2, ARIA practices, Section 508, and EN 301 549, plus screen-reader and cognitive-accessibility guidance.

In plain words
What is it for?
Use it to plan or assess accessibility work, choose the right standards, map findings to requirements, evaluate risk and evidence, and hand the resulting work to a backlog.
Why use it?
It gives agents a common process and reference material for finding accessibility problems and planning corrections.

Skill for Claude Code ✓ vendor

Written for Claude Code: user-invocable in frontmatter. Also seen: mentions subagents.

Needs its repository: it runs a file that does not travel with it, so clone the repository first. The line is uv run scripts/scan.py https://example.com --allow-host example.com.

Good fit Use it to plan or assess accessibility work, choose the right standards, map findings to requirements, evaluate risk and evidence, and hand the resulting work to a backlog.

Compare 6 skills from other repositories ↓
About the project

HVE Core is a collection of agents, prompts, coding instructions, and skills for building repeatable software-development workflows with GitHub Copilot. It is intended for individuals and teams that want structured AI-assisted research, planning, implementation, and review, while the catalogue entries provide many of its reusable workflow components.

microsoft/hve-core · 1,529 stars · on GitHub

Install

Getting it into your agent

It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.

Clone the repo
git clone --depth 1 https://github.com/microsoft/hve-core
agentmods
npx agentmods add skills/microsoft/hve-core/accessibility

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for accessibility

README.md
[![agentmods](https://agentmods.dev/badge/skills/microsoft/hve-core/accessibility/github.svg)](https://agentmods.dev/skills/microsoft/hve-core/accessibility)
Your own site
<a href="https://agentmods.dev/skills/microsoft/hve-core/accessibility"><img src="https://agentmods.dev/badge/skills/microsoft/hve-core/accessibility/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for accessibility

Your own site · 80×15
<a href="https://agentmods.dev/skills/microsoft/hve-core/accessibility"><img src="https://agentmods.dev/badge/skills/microsoft/hve-core/accessibility.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 47 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 9,002 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 5 findings, up to medium

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • medium Excessive Agency · line 426
    Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.
    Fix: Add human-in-the-loop confirmation for destructive, irreversible, or high-impact operations. Never auto-execute commands that modify files, send data, or alter system state.
  • medium Prompt Injection · line 60
    Large whitespace padding was detected (a block of blank lines or a long run of spaces). This can push injected instructions below or to the right of the visible area so a human reviewer never sees them while the agent still reads them. Manual review of the hidden content is recommended.
    Fix: Remove the large whitespace padding (blank-line blocks or long space runs) and review any content hidden below or to the right of it. Keep skill files compact and reviewable so no instructions can be
  • medium Prompt Injection · line 62
    Large whitespace padding was detected (a block of blank lines or a long run of spaces). This can push injected instructions below or to the right of the visible area so a human reviewer never sees them while the agent still reads them. Manual review of the hidden content is recommended.
    Fix: Remove the large whitespace padding (blank-line blocks or long space runs) and review any content hidden below or to the right of it. Keep skill files compact and reviewable so no instructions can be
  • medium Prompt Injection · line 248
    Large whitespace padding was detected (a block of blank lines or a long run of spaces). This can push injected instructions below or to the right of the visible area so a human reviewer never sees them while the agent still reads them. Manual review of the hidden content is recommended.
    Fix: Remove the large whitespace padding (blank-line blocks or long space runs) and review any content hidden below or to the right of it. Keep skill files compact and reviewable so no instructions can be
  • medium Prompt Injection · line 253
    Large whitespace padding was detected (a block of blank lines or a long run of spaces). This can push injected instructions below or to the right of the visible area so a human reviewer never sees them while the agent still reads them. Manual review of the hidden content is recommended.
    Fix: Remove the large whitespace padding (blank-line blocks or long space runs) and review any content hidden below or to the right of it. Keep skill files compact and reviewable so no instructions can be
How audits are shown
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 5.1 $0.00047 $0.09002
Opus 5.5 $0.00019 $0.03601
Sonnet 5.5 $0.00009 $0.01800
Haiku 4.5 $0.00005 $0.00900

Measured 9d ago against content hash c9a3fbc06f2c, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, 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 9d ago.

The scan reads SKILL.md. This mod also ships 25 executable files (scripts/runtime_a11y/__init__.py, scripts/runtime_a11y/__main__.py, scripts/runtime_a11y/_config.py, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

.github/skills/accessibility/accessibility/SKILL.md · 485 lines

How it starts

The opening of the file, as written. The whole thing — 485 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Accessibility — Skill Entry

This skill is the canonical accessibility reference contract for HVE Core. Agents and instructions invoke this skill by name and rely on it to own framework reference resolution, phase guidance resolution, and the scanner CLI entrypoint.

Framework references

Assessment reference (cross-cutting, not a conformance framework):

  • Assistive-technology announcement model — read this when deciding the announcement-class criteria (WCAG 1.3.1, 4.1.2, 4.1.3): what a screen-reader user should hear, and how to decide it with an accessibility-tree assertion or a manual AT pass.

Accessibility Planner workflow

The Accessibility Planner runs six phases, each keyed to a state id:

  1. Phase 1 — Discovery (discovery)
  2. Phase 2 — Framework Selection (framework-selection)
  3. Phase 3 — Standards Mapping (standards-mapping)
  4. Phase 4 — Plan Risk Assessment (plan-risk-assessment)
  5. Phase 5 — Impact and Evidence (impact-evidence)
  6. Phase 6 — Backlog Handoff (backlog-handoff)

Phase reference index

  • Phase 1 — Discovery: capture-coaching.md — read this when running exploration-first capture questioning.
  • Phase 2 — Framework Selection: framework-selection.md — read this when choosing which frameworks and conformance level apply.
  • Phase 3 — Standards Mapping: walk the framework references roll-up tables to emit controlMappings; consumed by Phase 5. No dedicated file — mapping is driven by the framework roll-ups.
  • Phase 4 — Plan Risk Assessment: capture-coaching.md governs the questioning posture when escalation triggers reopen scoping; tier criteria are applied per the Accessibility Planner identity instructions and recorded as riskClassification.tier. No dedicated file — the accessibility risk surface is narrow enough to stay inline.
  • Phase 5 — Impact and Evidence: impact-assessment.md — read this when building the evidence register, tradeoff log, and seed work-items.
  • Phase 6 — Backlog Handoff: backlog-handoff.md — read this when rendering work items and validating handoff gates.

Read the full file on GitHub · 485 lines

Files

What ships with it

60 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. 9d ago Changed c9a3fbc06f2c
  2. 25d ago Changed 83283a35a15b
  3. 28d ago Changed · +50 lines 614c2f26e792
  4. 1mo ago Changed · +17 lines 76c873cdd05e
  5. 1mo ago First seen · 418 lines · 47 tokens per session scan A 213b5a4833bc

Subscribe to this mod's changes

accessibility is a skill published in the GitHub repository microsoft/hve-core (1,529 stars, last pushed today), licensed MIT. It adds 47 tokens to every session and 9,002 once invoked, about $0.0002 per session on Opus 5.5. 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 2026-08-30.

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