Format Analysis & Migration Guide
Cursor Rules vs. Claude Code Skills
A comprehensive technical comparison between Cursor's .cursorrules and Anthropic Claude Code's SKILL.md standard. Understand execution models, token overhead, and how to build cross-compatible agent rules.
| Dimension | Cursor IDE | Claude Code | Technical Takeaway |
|---|---|---|---|
| Primary File Format | .cursorrules or .cursor/rules/*.mdc | SKILL.md (with YAML frontmatter) | SKILL.md is standardizing across more tools |
| Context Overhead | Loaded on every prompt (consumes context permanently) | Task-based on demand (zero token overhead when idle) | Claude Code SKILL.md saves significant tokens |
| Trigger Mechanism | Always-on global instructions or glob-matched patterns | Automated semantic routing via useWhen triggers | Claude Code provides cleaner task isolation |
| Tool/Action Integration | System prompt instructions + manual @mentions | Explicit tools, scripts, and inputs/outputs declarations | SKILL.md supports richer sub-action workflows |
| Cross-Agent Portability | Proprietary to Cursor IDE ecosystem | Universal: supported by Claude Code, Codex, Antigravity, Cursor | Universal SKILL.md runs everywhere |
# .cursorrules (Plain Markdown) You are an expert developer. Always enforce these rules on every interaction: 1. Always use Tailwind CSS v4 with dark mode. 2. Background color must be #09090b. 3. Micro-borders must be rgba(255,255,255,0.08). 4. No clunky gradients or generic white cards.
Characteristic: Simple to drop in, but injects tokens into every single prompt regardless of task.
--- name: linear-dark-ui description: Enforce Silicon Valley dark UI useWhen: - "Build or refine a dark-mode interface" --- # Linear Dark UI Standard ## System Constraints - Zinc-950/obsidian surface depth - 1px micro-border strokes
Characteristic: Zero context waste. Loaded dynamically only when the user works on frontend UI.
How to Migrate from .cursorrules to Universal SKILL.md
Follow this 3-step workflow to split monolithic cursor rules into modular, cross-compatible skills.
Split Concerns
Separate your styling rules, architecture standards, and SEO requirements into distinct logical files instead of one giant 500-line prompt.
Add YAML Frontmatter
Prepend standard metadata: define clear name, description, and explicit useWhen trigger phrases.
Place in .agents/skills
Store skills in .agents/skills/. Both Cursor and Claude Code can discover instructions in this shared folder.
Frequently Asked Questions: Cursor vs. Claude Code
Can I use the same SKILL.md file inside Cursor?
Yes! Cursor supports reading markdown rules from project directories like .cursor/rules/ or referencing .agents/skills/. AgentTaste designs every skill with universal YAML frontmatter so a single repository configuration works in both Cursor and Claude Code without duplicate files.
Why does Claude Code use SKILL.md instead of a monolithic prompt?
Monolithic prompts like traditional .cursorrules consume context tokens on every single interaction, even when you are just fixing a one-line typo. SKILL.md files stay inert until the agent detects that the task requires design, refactoring, or SEO, keeping the active context window clean and fast.
How do I convert my existing .cursorrules into a Claude Code skill?
Extract the domain-specific constraints from your .cursorrules, add a YAML frontmatter header (specifying name, description, and useWhen triggers), and save the file to .claude/skills/<skill-name>/SKILL.md.
Which tool produces higher quality frontend design?
Both Cursor (Sonnet 3.7) and Claude Code share the same underlying Anthropic model intelligence. The visual difference comes entirely from the quality of negative constraints injected into their prompt context. Without rules, both tools generate generic cards and gradients; with AgentTaste skills, both produce restrained, production-ready interfaces.
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