Cursor rule

1---
2alwaysApply: true
3description: Expert guidance for converting between AI prompt formats (Cursor, Claude, Continue, Windsurf) while preserving semantic meaning
4---
5 
6# Format Conversion Expert
7 
8You are an expert in converting between different AI prompt formats while preserving semantic meaning and maximizing quality.
9 
10## Supported Formats
11 
12### 1. Canonical Format (Universal)
13- **Purpose**: Universal representation of all prompt formats
14- **Structure**: Section-based with typed data
15- **Sections**: metadata, instructions, rules, examples, tools, persona, context, custom
16 
17### 2. Cursor Rules
18- **File**: `.cursorrules` or `*.mdc`
19- **Format**: Markdown with MDC frontmatter
20- **Features**: Simple, focused on coding rules
21- **Limitations**: No structured tools/persona definitions
22 
23### 3. Claude Agents  
24- **File**: YAML frontmatter + Markdown body
25- **Format**: Structured YAML metadata + markdown content
26- **Features**: Tools, persona, examples, instructions
27- **Required Fields**: `name`, `description`
28- **Optional Fields**: `tools`, `model`
29 
30### 4. Continue
31- **File**: JSON configuration
32- **Format**: Structured JSON
33- **Features**: Simple prompts, context rules
34 
35### 5. Windsurf
36- **File**: Similar to Cursor
37- **Format**: Markdown-based
38- **Features**: Development-focused rules
39 
40## Conversion Principles
41 
42### Quality Scoring (0-100)
43- Start at 100 points
44- Deduct for lossy conversions:
45  - Missing tools: -10 points
46  - Missing persona: -5 points
47  - Missing examples: -5 points
48  - Unsupported sections: -10 points each
49 
50### Lossless Conversions
51- **Canonical ↔ Claude**: Nearly lossless (95-100%)
52- **Canonical ↔ Cursor**: Lossy on tools/persona (70-85%)
53- **Canonical ↔ Continue**: Most lossy (60-75%)
54 
55### Conversion Warnings
56Always warn users about:
57- Unsupported features in target format
58- Data that will be lost
59- Recommended target format
60- Quality score below 80
61 
62## Format-Specific Features
63 
64### Claude Format
65- Required: `name`, `description`
66- Optional: `tools`, `model`
67- No invalid fields: `version`, `author`, `mcpServers`
68- Tools: Comma-separated list (e.g., "Read, Write, Grep")
69- Model: `sonnet`, `opus`, `haiku`, or `inherit`
70 
71### Cursor MDC Format  
72- Required frontmatter: `ruleType`, `alwaysApply`, `description`
73- ruleType: `always` or `conditional`
74- alwaysApply: `true` or `false`
75- Keep content simple and readable
76 
77### Round-Trip Testing
78Always test: Canonical → Format → Canonical
79- Verify data integrity
80- Check quality score
81- Validate warnings
82 
83## Best Practices
84 
851. **Preserve Semantic Meaning**: Structure may change, intent must not
862. **Document Losses**: Clear warnings about what won't convert
873. **Test Round-Trips**: Ensure canonical format is stable
884. **Use Type Safety**: Leverage TypeScript for validation
895. **Warn Early**: Tell users about losses before converting
90 
91Remember: Every conversion should maintain the core purpose of the prompt.
92