Add DesignOS design intelligence rule

[ardamoustafa1]

Adds a reusable Cursor Project Rule inspired by DesignOS.

This is not a standalone tool listing: the PR adds an actual .mdc rule file under rules/ plus a README entry. The rule focuses on practical Cursor guidance for UI craft, project memory, industry context, self-review, accessibility, and honest proof.

Disclosure: I maintain DesignOS, which is credited as the source.

Summary by CodeRabbit

• Documentation
  • Added a DesignOS Design Intelligence guide to the CSS and Styling rules documentation.
  • Documented guidance for UI quality, accessibility, design review, project context, and transparent presentation of evidence.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 17b030c4-7aa9-4b6b-9d22-91ecaa366f37

📥 Commits

Reviewing files that changed from the base of the PR and between b044f95 and acca6a1.

📒 Files selected for processing (2)

• README.md
• rules/designos-design-intelligence.mdc

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📝 Walkthrough

Walkthrough

Adds a new DesignOS design intelligence Cursor ruleset covering UI craft, accessibility, honesty, proof, and review gates, and links it from the README’s CSS and Styling section.

Changes

DesignOS design intelligence

Layer / File(s)	Summary
Ruleset and README catalog entry rules/designos-design-intelligence.mdc, README.md	Adds the non-default front-end ruleset and documents it in the CSS and Styling rule list.

Estimated code review effort: 1 (Trivial) | ~5 minutes

Suggested reviewers: patrickjs

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Description check	⚠️ Warning	The description lacks the required template sections and checklist, so it does not meet the repository format.	Add the required headings for Summary, Contribution Type, Value To Cursor Users, Added Or Changed Files, Quality Checklist, and Notes For Maintainers.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly matches the main change: adding a DesignOS-inspired Cursor rule.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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