accessible-content

accessible-content is a skill for Claude Code from Owl-Listener/designpowers. It costs 49 tokens per session (1,027 once invoked), scanned A, original, MIT.

A writing guide for clear, accessible text in interfaces and other user-facing content.

In plain words
What is it for?
Use it for labels, headings, error messages, help text, alt text, links, form instructions, and other visible product copy.
Why use it?
It reduces confusion for people using screen readers, reading in another language, or trying to understand instructions under pressure.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the designpowers plugin — 36 skills, 10 agents, 1 hook 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/owl-listener/designpowers/accessible-content
Any agent
npx skills add Owl-Listener/designpowers --skill accessible-content
Clone the repo
git clone --depth 1 https://github.com/Owl-Listener/designpowers

Made for: Claude Code.

Or install designpowers, the plugin that ships this one along with the rest of its 36 skills, 10 agents, 1 hook.

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 accessible-content

README.md
[![agentmods](https://agentmods.dev/badge/skills/owl-listener/designpowers/accessible-content.svg)](https://agentmods.dev/skills/owl-listener/designpowers/accessible-content)
Your own site
<a href="https://agentmods.dev/skills/owl-listener/designpowers/accessible-content"><img src="https://agentmods.dev/badge/skills/owl-listener/designpowers/accessible-content.svg" alt="Measured on agentmods" height="20"></a>
Per session 49 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,027 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 5.1 $0.00049 $0.01027
Opus 5 $0.00024 $0.00513
Sonnet 5 $0.00010 $0.00205
Haiku 4.5 $0.00005 $0.00103

Measured 6d ago against content hash d13ce1628463, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

accessible-content 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 6d 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.

skills/accessible-content/SKILL.md · 102 lines

How it starts

The opening of the file, as written. The whole thing — 102 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Accessible Content

Words are interface. Every label, every heading, every error message is a design decision. This skill ensures content works for screen readers, for people reading in a second language, for people under stress, and for people who just need things to be clear.

When to Use

  • Writing interface labels, button text, or form instructions
  • Structuring headings and page hierarchy
  • Writing error messages or help text
  • Creating alt text for images
  • Writing link text
  • Structuring data tables
  • Any time words appear on screen

Process

Step 1: Plain Language First

Every piece of content should meet these criteria:

  • Reading level: aim for a reading age of 12-14 (roughly 6th-8th grade). Use short sentences and common words
  • One idea per sentence. If a sentence has "and" in the middle, consider splitting it
  • Active voice. "We sent your confirmation" not "Your confirmation has been sent"
  • Specific over vague. "Save your changes" not "Submit" or "OK"
  • No jargon unless the audience demonstrably uses it. When jargon is necessary, provide a plain explanation

Step 2: Heading Structure

Headings are navigation for screen readers. Get the structure right:

  • One H1 per page — describes the page purpose
  • Headings follow a logical hierarchy — H1 → H2 → H3, never skip levels
  • Headings are descriptive — a screen reader user scanning headings alone should understand the page structure
  • Do not use headings for visual styling — if you need big bold text that is not a heading, use CSS

Step 3: Form Labels and Instructions

Every form input must have:

  • A visible label — placeholders are not labels (they disappear on focus)
  • Programmatic association<label for="id"> or aria-labelledby
  • Required field indication — visible and announced, not just an asterisk
  • Format hints — "DD/MM/YYYY" before the input, not after
  • Error associationaria-describedby linking the input to its error message

Read the full file on GitHub · 102 lines

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. 6d ago First seen · 102 lines · 49 tokens per session scan A d13ce1628463

Subscribe to this mod's changes

accessible-content is a skill published in the GitHub repository Owl-Listener/designpowers (240 stars, last pushed 2mo ago), licensed MIT. It adds 49 tokens to every session and 1,027 once invoked, about $0.0002 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 2026-08-30.

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