[Adapter] Cursor

[shreyas-lyzr]

Summary

Add a full adapter for Cursor, enabling export, run, and enhanced import support.

Details

Cursor is a widely-used AI-powered code editor. It uses:

• .cursor/rules/ directory with .mdc files (markdown with YAML frontmatter) for project rules
• .cursorrules (legacy, single file) for global project instructions
• Rule files support globs, alwaysApply, description, and content fields
• Rules can be scoped to specific file patterns (e.g., *.ts, src/api/**)

gitagent already has a basic cursor import (reads .cursorrules), but a full adapter would add:

• Export: Convert a gitagent agent to Cursor's .cursor/rules/*.mdc format, mapping skills to scoped rules
• Run: Not applicable (Cursor is an IDE, not a CLI runner) — skip or document as N/A
• Enhanced import: Read .cursor/rules/*.mdc files (not just legacy .cursorrules), map scoped rules to skills

Acceptance Criteria

• gitagent export --format cursor generates valid .cursor/rules/*.mdc files with frontmatter
• Skills with file globs map to scoped Cursor rules
• SOUL.md + RULES.md map to alwaysApply: true rules
• Enhanced import reads .cursor/rules/*.mdc directory (not just .cursorrules)
• Documentation added to README adapter table
• Mapping document: what gitagent fields map, what gets dropped

Resources

• Cursor rules docs
• Existing import in src/commands/import.ts (importFromCursor) for reference
• Existing adapters in src/adapters/ for the export pattern