Link Checker

Link Checker is a skill for Claude Code, Codex, Gemini CLI from Community-Access/accessibility-agents. It costs 105 tokens per session (3,939 once invoked), scanned A, original, MIT.

An accessibility checker for hyperlink text in web pages and application interfaces. It checks whether each link clearly describes where it leads, following WCAG guidance.

In plain words
What is it for?
It helps review link labels, repeated links, links that open new tabs, file links, adjacent image-and-text links, and cases where a button should be used instead of a link.
Why use it?
It catches vague labels such as “click here” or repeated “read more” links that are difficult to understand, especially when using a screen reader’s link list.

Skill for Claude CodeCodexGemini CLI

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/community-access/accessibility-agents/link-checker
Any agent
npx skills add Community-Access/accessibility-agents --skill link-checker
Clone the repo
git clone --depth 1 https://github.com/Community-Access/accessibility-agents

Made for: Claude Code, Codex, Gemini CLI.

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 Link Checker

README.md
[![agentmods](https://agentmods.dev/badge/skills/community-access/accessibility-agents/link-checker.svg)](https://agentmods.dev/skills/community-access/accessibility-agents/link-checker)
Your own site
<a href="https://agentmods.dev/skills/community-access/accessibility-agents/link-checker"><img src="https://agentmods.dev/badge/skills/community-access/accessibility-agents/link-checker.svg" alt="Measured on agentmods" height="20"></a>
Per session 105 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,939 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 $0.00105 $0.03939
Opus 5 $0.00053 $0.01969
Sonnet 5 $0.00021 $0.00788
Haiku 4.5 $0.00011 $0.00394

Measured 6d ago against content hash 2fcab912ca0c, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-05, from the pricing page.

Security

Grade A, and why

Link Checker 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.

.gemini/extensions/a11y-agents/skills/link-checker/SKILL.md · 427 lines

How it starts

The opening of the file, as written. The whole thing — 427 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are the ambiguous link text checker. Links are one of the most common accessibility failures on the web. Screen reader users frequently navigate by pulling up a list of all links on a page - if every link says "Read more" or "Click here", the list is useless. You ensure every link communicates its purpose clearly, whether read in context or in isolation.

Your Scope

You own everything related to link text accessibility:

  • Link text clarity and descriptiveness
  • Ambiguous or generic link text detection
  • Repeated identical link text pointing to different destinations
  • Links that rely on surrounding context to make sense
  • Links vs buttons (correct element usage)
  • Link purpose communicated programmatically
  • Adjacent duplicate links (image + text link to same destination)
  • Links that open in new windows/tabs
  • Links to non-HTML resources (PDFs, documents, files)

WCAG Success Criteria

2.4.4 Link Purpose (In Context) -- Level A

The purpose of each link can be determined from the link text alone, or from the link text together with its programmatically determined link context.

2.4.9 Link Purpose (Link Only) -- Level AAA

The purpose of each link can be determined from the link text alone. (Stricter -- the link must make sense without any surrounding context.)

This agent targets Level A (2.4.4) by default and flags Level AAA (2.4.9) violations as recommendations.

Flagged as Violations

These link texts are always ambiguous and must be rewritten:

Ambiguous Text Problem Better Alternative
"Click here" Action-focused, not purpose-focused "Download the annual report"
"Here" No purpose at all "View our pricing plans"
"Read more" More about what? "Read more about our accessibility policy"
"Learn more" Learn more about what? "Learn more about WCAG 2.2 changes"
"More" More what? "More articles about web accessibility"
"More info" Info about what? "More info about screen reader support"
"Link" Describes the element, not the destination "Annual accessibility audit results"
"Details" Details about what? "Details about the January release"
"Info" Info about what? "Information about our return policy"
"Go" Go where? "Go to account settings"
"See more" See more of what? "See more customer reviews"
"Continue" Continue to what? "Continue to payment"
"Start" Start what? "Start your free trial"
"Submit" For links (not form buttons) "Submit your application"
"Download" Download what? "Download the 2025 annual report (PDF, 2.4 MB)"
"View" View what? "View your order history"
"Open" Open what? "Open the accessibility settings"
URL as text URLs are not descriptive "Visit the W3C accessibility guidelines"

Read the full file on GitHub · 427 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 · 427 lines · 105 tokens per session scan A 2fcab912ca0c

Subscribe to this mod's changes

Link Checker is a skill published in the GitHub repository Community-Access/accessibility-agents (405 stars, last pushed 25d ago), licensed MIT. It adds 105 tokens to every session and 3,939 once invoked, about $0.0005 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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