Cursor rules examples

affaan-mReads credentialsCursor rule

ECC / rules

affaan-m/ECC/.cursor/rules/golang-security.md

Go security extending common rules

affaan-mReads credentialsCursor rule

ECC / rules

affaan-m/ECC/.cursor/rules/kotlin-security.md

Kotlin security extending common rules

affaan-mCursor rule

ECC / rules

affaan-m/ECC/.cursor/rules/php-security.md

PHP security extending common rules

affaan-mReads credentialsCursor rule

ECC / rules

affaan-m/ECC/.cursor/rules/python-security.md

Python security extending common rules

affaan-mReads credentialsCursor rule

ECC / rules

affaan-m/ECC/.cursor/rules/swift-security.md

Swift security extending common rules

affaan-mReads credentialsCursor rule

ECC / rules

affaan-m/ECC/.cursor/rules/typescript-security.md

TypeScript security extending common rules

affaan-mCursor rule

ECC / rules

affaan-m/ECC/.cursor/rules/common-security.md

Security: mandatory checks, secret management, response protocol

simstudioaiReads credentialsCursor rule

sim / rules

simstudioai/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.

No other project uses it yet

affaan-mCursor rule

ECC / rules

affaan-m/ECC/.cursor/rules/common-agents.md

Agent orchestration: available agents, parallel execution, multi-perspective analysis

affaan-mCursor rule

ECC / rules

affaan-m/ECC/.cursor/rules/common-patterns.md

Common patterns: repository, API response, skeleton projects

DietrichGebertCursor rule

ponytail / rules

DietrichGebert/ponytail/.cursor/rules/ponytail.mdc

Ponytail, lazy senior dev mode. Always pick the simplest solution that works.

No other project uses it yet

apacheCursor rule

superset / rules

apache/superset/.cursor/rules/dev-standard.mdc

Apache Superset development standards and guidelines for Cursor IDE

No other project uses it yet

maybe-financeCursor rule

maybe / rules

maybe-finance/maybe/.cursor/rules/project-design.mdc

This rule explains the system architecture and data flow of the Rails app

streamlitCursor rule

streamlit / rules

streamlit/streamlit/.cursor/rules/agents.mdc

testing-feature` | QA test features using Playwright | | `reviewing-local-changes` | Code review for quality, security, best practices, and product/API alignment | | `simplifying-local-changes` | Simplify and refine code changes

No other project uses it yet

streamlitCursor rule

streamlit / rules

streamlit/streamlit/.cursor/rules/python_lib.mdc

Production code must remain compatible with Python/OpenSSL environments running in FIPS mode. - For non-security hashing, use `streamlit.util.create_fast_hasher` (incremental hashing) or `calc_hash` (one-shot string/bytes hashing) instead

streamlitReads credentialsCursor rule

streamlit / rules

streamlit/streamlit/.cursor/rules/workflows.mdc

snapshots | | `spec-validation.yml` | PR with `change:spec` label | Validates product spec PRs in `specs/` directory | ### Security & Analysis | Workflow | Trigger | Description | |----------|---------|-------------| | `codeql-analysis.yml` | Push/PR to `develop`, weekly | GitHub CodeQL security scanning

appsmithorgReads credentialsCursor rule

appsmith / build

appsmithorg/appsmith/.cursor/rules/build/docker.mdc

Docker image optimization — minimal base images, layer caching, multi-stage builds, and size reduction

No other project uses it yet

PostHogCursor rule

posthog / rules

PostHog/posthog/.cursor/rules/django-python.mdc

Rules for writing Python services at PostHog (Python servers powered by the Django framework)

novuhqCursor rule

novu / rules

novuhq/novu/.cursor/rules/pnpm-release-age.mdc

pnpm minimumReleaseAge — never bypass for fresh publishes

eyaltoledanoCursor rule

claude-task-master / rules

eyaltoledano/claude-task-master/.cursor/rules/self_improve.mdc

Guidelines for continuously improving Cursor rules based on emerging code patterns and best practices.