canvas-accessibility-sweep

canvas-accessibility-sweep is a skill for Claude Code from bruchris/canvas-lms-mcp. It costs 131 tokens per session (1,902 once invoked), scanned A, original, MIT.

A read-only check of a Canvas course's pages, assignments, syllabus, announcements, and optionally quizzes for structural accessibility issues and broken or outdated links. Canvas is an online system used to deliver courses and manage learning materials.

In plain words
What is it for?
Use it before a term or after copying a course to create a prioritised list of issues to fix in Canvas. It reports problems but does not edit the course.
Why use it?
It helps find problems that could make course content difficult to access or cause students to follow unusable links before the course launches.

Skill for Claude Code

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

Part of the canvas-lms-mcp plugin — 16 skills, 5 agents, 2 MCP servers shipped together

Good fit Use it before a term or after copying a course to create a prioritised list of issues to fix in Canvas. It reports problems but does not edit the course.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/bruchris/canvas-lms-mcp/canvas-accessibility-sweep
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.

Any agent
npx skills add bruchris/canvas-lms-mcp --skill canvas-accessibility-sweep
Clone the repo
git clone --depth 1 https://github.com/bruchris/canvas-lms-mcp

Made for: Claude Code.

Or install canvas-lms-mcp, the plugin that ships this one along with the rest of its 16 skills, 5 agents, 2 MCP servers.

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 canvas-accessibility-sweep

README.md
[![agentmods](https://agentmods.dev/badge/skills/bruchris/canvas-lms-mcp/canvas-accessibility-sweep/github.svg)](https://agentmods.dev/skills/bruchris/canvas-lms-mcp/canvas-accessibility-sweep)
Your own site
<a href="https://agentmods.dev/skills/bruchris/canvas-lms-mcp/canvas-accessibility-sweep"><img src="https://agentmods.dev/badge/skills/bruchris/canvas-lms-mcp/canvas-accessibility-sweep/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 canvas-accessibility-sweep

Your own site · 80×15
<a href="https://agentmods.dev/skills/bruchris/canvas-lms-mcp/canvas-accessibility-sweep"><img src="https://agentmods.dev/badge/skills/bruchris/canvas-lms-mcp/canvas-accessibility-sweep.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 131 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,902 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.
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 $0.00131 $0.01902
Opus 5 $0.00066 $0.00951
Sonnet 5 $0.00026 $0.00380
Haiku 4.5 $0.00013 $0.00190

Measured 11d ago against content hash f6b88ffa89fd, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

canvas-accessibility-sweep 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 11d 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/canvas-accessibility-sweep/SKILL.md · 108 lines

How it starts

The opening of the file, as written. The whole thing — 108 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Canvas Accessibility Sweep

A read-only pre-launch pass over a course's content that flags structurally-detectable accessibility problems (WCAG 2.1) and broken or stale links, then hands you a prioritised remediation list. Built for the moment before a term starts — or right after a course copy — when you want to catch the issues that silently break for students before they do.

What this skill does NOT do

canvas-lms-mcp exposes two read-only audit tools for this workflow — audit_course_accessibility and audit_course_links. There is no fix tool: neither the accessibility domain nor the link domain can edit content. This skill therefore surfaces and prioritises problems; the actual edits happen in the Canvas Rich Content Editor. Do not claim to have "fixed" anything.

Two limits are worth stating up front so you don't over-promise:

  1. No color-contrast checking. audit_course_accessibility does structural checks only — it cannot see rendered theme CSS, so it does not evaluate text/background contrast. For contrast, point the user at Canvas's own in-app Accessibility Checker (course navigation → AccessibilityScan Course), which this skill complements rather than replaces.
  2. No outbound link-reachability checking. audit_course_links does structural checks only — it does not make HTTP requests, so it cannot tell you whether an external URL returns 404. It finds cross-course references (links still pointing at a previous copy of the course — the canonical stale-copy failure after an import) and empty or malformed URLs. A link to a genuinely dead external site will not be flagged.

Prerequisites

  • Canvas MCP server must be running and connected.
  • Instructor (or TA/designer) permissions on the course are required. Both audit tools return 403 without them.
  • Content in the target course must be created before the sweep is meaningful — running it on an empty shell finds nothing.

Steps

1. Identify the Target Course

Read the full file on GitHub · 108 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. 11d ago First seen · 108 lines · 131 tokens per session scan A f6b88ffa89fd

Subscribe to this mod's changes

canvas-accessibility-sweep is a skill published in the GitHub repository bruchris/canvas-lms-mcp (5 stars, last pushed today), licensed MIT. It adds 131 tokens to every session and 1,902 once invoked, about $0.0007 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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