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.
streamlitCursor rulestreamlit/streamlit/.cursor/rules/specs.mdc
template 3. Create PR titled `[spec] Feature name` (keep in Draft until ready for review) ## Spec Guidelines ### Problem First, Solution Second Never start with what you want to build. Start
Steady4 mentions in 2 weeks
No other project uses it yet
streamlitCursor rulestreamlit/streamlit/.cursor/rules/typescript.mdc
Data fetching without race protection (stale response can overwrite newer data). ### Rewrite patterns (preferred code) - Derived value during render: ```tsx // ❌ Avoid // const [fullName, setFullName] = useState("") // useEffect(() => setFullName(`${firstName} ${lastName}`), [firstName
Steady4 mentions in 2 weeks
No other project uses it yet
streamlitReads credentialsCursor rulestreamlit/streamlit/.cursor/rules/workflows.mdc
Description | |----------|---------|-------------| | `ai-pr-review.yml` | `ai-review`/`ai-final-review` label or manual | AI-powered code and product-alignment review using Cursor CLI | | `ai-qa-testing.yml` | `ai-qa-test` label or manual | AI-powered
Steady4 mentions in 2 weeks
No other project uses it yet
appsmithorgCursor ruleappsmithorg/appsmith/.cursor/rules/agent-behavior.mdc
Agent workflow orchestration, task management, and core principles for all interactions
No other project uses it yet
PostHogCursor rulePostHog/posthog/.cursor/rules/django-python.mdc
Rules for writing Python services at PostHog (Python servers powered by the Django framework)
1 project uses a version of this
CopilotKitCursor ruleCopilotKit/CopilotKit/.cursor/rules/quick-reference.mdc
documentation - Use [react-ui/](mdc:packages/react-ui) for pre-built components ### Set Up Development Environment - Review [package.json](mdc:package.json) for workspace setup - Use scripts in [scripts/](mdc:scripts) - Check [utilities
Steady3 mentions in 2 weeks
No other project uses it yet
simstudioaiCursor rulesimstudioai/sim/.cursor/rules/sim-api-contracts.mdc
API contracts, route builders, boundary annotations, and the requestJson client boundary
Steady23 mentions in 2 weeks
No other project uses it yet
simstudioaiReads credentialsCursor rulesimstudioai/sim/.cursor/rules/sim-sandbox.mdc
Isolated-vm sandbox worker security policy. Hard rules for anything that lives in the worker child process that runs user code.
Steady23 mentions in 2 weeks
No other project uses it yet
simstudioaiCursor rulesimstudioai/sim/.cursor/rules/sim-testing.mdc
Test layers, naming, and Vitest mechanics for Sim
Steady23 mentions in 2 weeks
No other project uses it yet
HumanSignalCursor ruleHumanSignal/label-studio/.cursor/rules/storage-provider.mdc
How to add a new storage or data connector for Label Studio
eyaltoledanoReads credentialsCursor ruleeyaltoledano/claude-task-master/.cursor/rules/dev_workflow.mdc
Guide for using Taskmaster to manage task-driven development workflows
Coolinginterest down 70% this month
eyaltoledanoCursor ruleeyaltoledano/claude-task-master/.cursor/rules/git_workflow.mdc
Git workflow integrated with Task Master for feature development and collaboration
Coolinginterest down 70% this month
eyaltoledanoCursor ruleeyaltoledano/claude-task-master/.cursor/rules/new_features.mdc
Guidelines for integrating new features into the Task Master CLI
Coolinginterest down 70% this month
eyaltoledanoReads credentialsCursor ruleeyaltoledano/claude-task-master/.cursor/rules/taskmaster/dev_workflow.mdc
Guide for using Taskmaster to manage task-driven development workflows
Coolinginterest down 70% this month
eyaltoledanoReads credentialsCursor ruleeyaltoledano/claude-task-master/.cursor/rules/taskmaster.mdc
Comprehensive reference for Taskmaster MCP tools and CLI commands.
Coolinginterest down 70% this month
eyaltoledanoReads credentialsCursor ruleeyaltoledano/claude-task-master/.cursor/rules/taskmaster/taskmaster.mdc
Comprehensive reference for Taskmaster MCP tools and CLI commands.
Coolinginterest down 70% this month
albumentations-teamCursor rulealbumentations-team/albumentations/.cursor/rules/coding-guidelines.mdc
under `tests/` - Follow existing test patterns and naming conventions - Use pytest fixtures when appropriate ## Code Review Guidelines Before submitting your PR: 1. Run all tests 2. Run pre-commit hooks
alibabaCursor rulealibaba/hooks/.cursor/rules/git.mdc
从保护分支（通常是 `master`）创建新的功能分支 2. 在新分支上进行开发 3. 提交 Pull Request 到目标分支 4. 等待 Code Review 和 CI 通过 5. 合并到目标分支 ## 分支命名规范 - 功能开发：`feat/description-of-feature` - 例如：`feat/add-dark-mode` - 例如：`feat/improve-table-performance` - 问题修复：`fix/issue-number-or-description` - 例如
Steady8 mentions in 2 weeks
No other project uses it yet
567-labsCursor rule567-labs/instructor/.cursor/rules/documentation-sync.mdc
when making code changes or adding documentation
Steady3 mentions in 2 weeks
No other project uses it yet
keplerglDeletes or force-pushesCursor rulekeplergl/kepler.gl/.cursor/rules/no-auto-commit-push.mdc
Never commit or push without explicit user approval
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.
