The rules real projects give Cursor's agent, from .cursor/rules.
Files you open will collect here, so you can find them again.
Open two or more, and you can remix the rules you like from each into one list. Kept in this browser only.
lightdashCursor rulelightdash/lightdash/.cursor/rules/backend.mdc
Implement proper error categorization - Track error rates and patterns - Monitor error impact on performance ## Security Considerations 1. **Authorization** - Use CASL for permission management - Implement proper role-based access control - Validate
Steady46 mentions in 2 weeks
No other project uses it yet
VercelCursor rulevercel/streamdown/apps/website/.cursor/.cursor/rules/ultracite.mdc
Ultracite Rules - AI-Ready Formatter and Linter
Steady8 mentions in 2 weeks
10 projects use a version of this
reown-comCursor rulereown-com/appkit/.cursor/rules/appkit-monorepo.mdc
Monorepo-wide rules for Reown AppKit: structure, layering, packaging, and TS/SDK best practices
Steady5 mentions in 2 weeks
No other project uses it yet
reown-comCursor rulereown-com/appkit/.cursor/rules/appkit-packages.mdc
Focused rules for working in packages (controllers, scaffold-ui views, new packages)
Steady5 mentions in 2 weeks
No other project uses it yet
Adam-CADReads credentialsCursor ruleAdam-CAD/CADAM/.cursor/rules/project-overview.mdc
Three.js resources - Use React Three Fiber for React integration - Handle WebGL context loss gracefully ### Security - All sensitive operations go through authenticated Edge Functions - Implement proper CORS policies - Validate all user
MCSManagerCursor ruleMCSManager/MCSManager/.cursor/rules/backend-daemon-panel-standards.mdc
Backend development conventions
No other project uses it yet
dmno-devReads credentialsCursor ruledmno-dev/varlock/.cursor/rules/style-guide.mdc
explains why loadEnv(); // loads the env vars for the app, which is important for security ``` output: | ```js loadEnv(); ``` This code loads environment variables for the app. metadata: priority: high version
Steady21 mentions in 2 weeks
No other project uses it yet
prestCursor ruleprest/prest/.cursor/rules/agentic-loop.mdc
pREST agentic develop→validate loop — follow on every coding task
No other project uses it yet
prestCursor ruleprest/prest/.cursor/rules/config-resilience.mdc
Config warn-and-continue for non-sensitive keys; Auth/ACL/JWT/secrets/DB credentials fail closed
No other project uses it yet
prestCursor ruleprest/prest/.cursor/rules/planning-and-delegation.mdc
Plan every task first, parallelise independent work, and staff each task with the cheapest model that can do it well
No other project uses it yet
isaac-simCursor ruleisaac-sim/IsaacSim/.cursor/rules/changelog_md.mdc
Rules for writing and maintaining extension CHANGELOG.md files
Steady2 mentions in 2 weeks
No other project uses it yet
isaac-simCursor ruleisaac-sim/IsaacSim/.cursor/rules/modules_changelog.mdc
Changelog rules for independently shipped libraries under source/libraries
Steady2 mentions in 2 weeks
No other project uses it yet
isaac-simCursor ruleisaac-sim/IsaacSim/.cursor/rules/python_codestyle.mdc
This rule file should be used for Python code development
Steady2 mentions in 2 weeks
No other project uses it yet
lilishopCursor rulelilishop/lilishop/.cursor/rules/02-technical-architecture.mdc
Stack - Spring Boot - Core framework - Spring MVC - Web framework - Mybatis-Plus - ORM framework - Spring Security - Security framework - JWT - Authentication - RocketMQ - Message queue - Redis & MongoDB - Caching - Elasticsearch - Search engine - MySQL - Primary
No other project uses it yet
lilishopCursor rulelilishop/lilishop/.cursor/rules/03-development-guidelines.mdc
HTTP methods (GET, POST, PUT, DELETE) - Use consistent URL patterns - Implement proper error handling ## Security Guidelines 1. All sensitive operations must be authenticated 2. Use Spring Security for access control
No other project uses it yet
johnlindquistCursor rulejohnlindquist/kit/.cursor/rules/derived-cursor-rules.mdc
AI rules derived by SpecStory from the project AI interaction history
No other project uses it yet
OpnFormReads credentialsCursor ruleOpnForm/OpnForm/.cursor/rules/docs.mdc
using 8.8.8.8 as DNS server ```javascript const config = { performance: { cache: true, timeout: 30000 }, security: { encryption: 'AES-256' } }; ``` ### API documentation components #### Parameter fields Unique identifier for the user. Must
No other project uses it yet
OpnFormCursor ruleOpnForm/OpnForm/.cursor/rules/forms.mdc
Nuxt client: Form creation, validation, and state management patterns. Use when working with form components, input validation, error handling, form submission with TanStack Query mutations, or when creating/modifying forms with @/components/forms, useForm composable, or form-related functionality.
No other project uses it yet
leaperoneCursor ruleleaperone/MultiPost-Extension/.cursor/rules/chrome-extension.mdc
chrome.alarms for scheduled tasks - Use chrome.action API for browser actions - Handle offline functionality gracefully Security and Privacy - Implement Content Security Policy (CSP) - Handle user data securely - Prevent XSS and injection
No other project uses it yet
DataDogCursor ruleDataDog/datadog-agent/.cursor/rules/system_probe_modules.mdc
This rule serves for development of new system-probe modules that use eBPF, and need to send data to the backend
Steady3 mentions in 2 weeks
No other project uses it yet
Instruction files for Cursor's agent, kept in .cursor/rules/ as .mdc files.
A rule can apply only to files matching a pattern, or only when the agent asks for it. AGENTS.md always applies.
Copy the .mdc file into your project's .cursor/rules/ directory and adjust its globs.
Open a rule to see its discussion. Reports from people and their agents are coming.
