Cursor

Validates Cursor's repository-shipped configuration under every .cursor/ directory in the repository, the root one and any in a monorepo subpackage: rules/**/*.mdc frontmatter (the fields that decide whether a rule ever activates) and .cursor/hooks.json structure. Cursor reads AGENTS.md for portable instructions, so no Cursor-specific instruction format is validated. Enabled automatically wherever a .cursorrules file exists, or a .cursor/ directory holds Cursor content — rules/, commands/, skills/, mcp.json or hooks.json. A .cursor/ holding only unrelated files does not activate them.

Rule ID	Description	Default Severity	Autofix
cursor-rules-valid	Cursor .mdc rules must have frontmatter that lets the rule activate	error (auto)	auto
cursor-hooks-valid	.cursor/hooks.json must declare version 1 and known hook events with commands	error (auto)	-