chore: create dedicated Claude and Codex skills, remove shared skill

[Copilot]

Both .claude/skills/ and .codex/skills/ were pointing to a shared skills/a11y-audit/SKILL.md, adding unnecessary verbosity to the codebase root and preventing LLM-specific optimization.

Changes

Claude skill (.claude/skills/a11y-audit/SKILL.md)

• Simple frontmatter per Claude agent skills spec: name + description
• Full accessibility audit checklist inline

Codex skill (.codex/skills/a11y-audit/SKILL.md)

• Extended frontmatter per agentskills.io spec: adds version: 1.0.0 and tags
• Same audit content, enables platform-specific enhancement later

---
name: codex-a11y-audit
description: Use when reviewing UI diffs...
version: 1.0.0
tags:
  - accessibility
  - ui
  - testing
---

Updated references

• .cursorrules/accessibility.md now points exclusively to .codex/skills/a11y-audit/SKILL.md (since Cursor IDE uses Codex)

Removed

• skills/a11y-audit/SKILL.md and empty parent directory

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Setup Claude and Codex skills</issue_title>
<issue_description>### Priority

None

Feature Description

Create dedicated SKILL.md for Claude and Codex. Currently, they're both pointing to a shared SKILL.md, but that is making the codebase root unnecessarily verbose. It also doesn't let us leverage the nuances between Claude and Codex.

Save Codex skill in .codex/skills

When creating the Codex accessibility skill, follow:

• https://developers.openai.com/codex/skills/create-skill
• https://agentskills.io/specification

When creating Claude skill, save in .claude/skills/ and follow:

• https://platform.claude.com/docs/en/agents-and-tools/agent-skills/overview

Remove the shared skill in favor of the custom skills for each LLM

Use Case

This'll save devs time by making the LLM responses higher quality

Additional Context

• Codex skills: https://developers.openai.com/codex/skills/</issue_description>

<agent_instructions>Follow best practices. Take your time to read the provided docs and make the best implementation</agent_instructions>

Comments on the Issue (you are @copilot in this section)

• Fixes Setup Claude and Codex skills #1408

---

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[Copilot]

Pull request overview

This PR successfully migrates from a shared accessibility audit skill to dedicated Claude and Codex skills, reducing verbosity in the codebase root and enabling LLM-specific optimizations in the future.

Key changes:

• Created separate skill files for Claude (.claude/skills/a11y-audit/SKILL.md) and Codex (.codex/skills/a11y-audit/SKILL.md) with platform-specific frontmatter
• Updated all references in .cursorrules/accessibility.md to point to the new LLM-specific skill locations
• Removed the shared skills/a11y-audit/SKILL.md file

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

File	Description
.claude/skills/a11y-audit/SKILL.md	Created Claude-specific skill with minimal frontmatter (name + description) per Claude agent skills spec
.codex/skills/a11y-audit/SKILL.md	Created Codex-specific skill with extended frontmatter including version and tags per agentskills.io spec
.cursorrules/accessibility.md	Updated all four references to point to both new skill locations
skills/a11y-audit/SKILL.md	Removed shared skill file

[tyler-dane]

@copilot