Two design skills · both proven

accessibility-compliance vs mcp-builder

Both skills were run through Claude twice: once on a fixed brief without the skill, once with it. The briefs differ because each is written for the job the skill claims to do, so compare each skill against its own baseline, then decide which difference matters for your work.

accessibility-compliance

Implement WCAG 2.2 compliant interfaces with mobile accessibility, inclusive design patterns, and assistive technology support. Use when auditing accessibility, implementing ARIA patterns, building for screen readers, or ensuring inclusive user experiences.

Category: Design
Source: wshobson/agents
License: MIT
Proof model: claude-opus-5-5
Brief: “Build the settings page for a team workspace app with tabs for Profile, Notifications and Privacy, including toggles, a select menu, a danger zone, and save and cancel buttons with success and error states. Make it fully keyboard-navigable and screen-reader friendly, and make it look like a finished product.”
Skill commit: 0874a27

Without the skillWith accessibility-compliance

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Without, runWith accessibility-compliance, run3 independent runs per side, none selected by hand.

Download the with-skill page

mcp-builder

Guide for creating high-quality MCP (Model Context Protocol) servers that enable LLMs to interact with external services through well-designed tools. Use when building MCP servers to integrate external APIs or services, whether in Python (FastMCP) or Node/TypeScript (MCP SDK).

Category: Design
Source: anthropics/skills
License: Not stated
Proof model: claude-opus-5-5
Brief: “Build an MCP server in TypeScript that gives an agent read access to a team's Linear-style issue tracker through a REST API: tools to search issues, get one issue with comments, and list a project's open issues by priority. Present it as a single HTML page with the full source of each file, the tool schemas, how errors and pagination are handled, and how to run and connect it.”
Skill commit: dbd4588

Without the skillWith mcp-builder

⇆

Without, runWith mcp-builder, run3 independent runs per side, none selected by hand.

Download the with-skill page

We don’t pick a winner for you: the pages are the evidence. Both proofs can be repeated with the brief, model and commit shown above. See alternatives to accessibility-compliance or alternatives to mcp-builder.