Cursor · C# · ASP.NET Core · Popular baseline

# Cursor · C# + ASP.NET Core  
Generated February 10, 2026  
Agent: Cursor  
Language: C#  
Framework: ASP.NET Core

## Global rules
- Start by reading existing project instructions and architecture docs before changing behavior.

- Prefer minimal diffs and preserve existing code style and naming conventions.

- State assumptions and call out risks before making breaking or cross-module changes.

- When behavior changes, add or update tests in the closest existing test layer.

- Never commit secrets, tokens, credentials, or generated private keys.

Start by reading existing project instructions and architecture docs before changing behavior.

Prefer minimal diffs and preserve existing code style and naming conventions.

State assumptions and call out risks before making breaking or cross-module changes.

When behavior changes, add or update tests in the closest existing test layer.

Never commit secrets, tokens, credentials, or generated private keys.

## Agent-specific
- Optimize for fast feedback loops; run targeted checks after each major edit.

- Avoid speculative refactors unless requested.

## Language-specific
- Use strong DTOs/records and nullable annotations consistently.

- Keep service interfaces explicit and dependency injection clean.

- Prefer async I/O paths for network/database operations.

## Framework-specific
- Use dependency injection and keep controllers lightweight.

- Validate DTOs and enforce authorization attributes at boundaries.

## Options

### Testing rules
- Require tests for changed behavior or document why tests were not added.

- Run the smallest relevant test subset first, then broaden if needed.

### Architecture rules
- Preserve module boundaries and avoid leaking internal abstractions.

- Prefer incremental refactors over large rewrites.

### Security rules
- Validate and sanitize all user-controlled input.

- Apply least-privilege defaults for data access and actions.

### Ask before changing public API
- Before changing a public API, present the impact and ask for explicit confirmation.

- If approved, document the migration path for consumers.

### Prefer minimal diffs
- Limit changes to the smallest set of files and lines needed.

- Defer unrelated cleanup to separate follow-up changes.

### Documentation rules
- Update docs/examples whenever behavior, APIs, or setup steps change.

- Add concise release notes for user-facing or breaking changes.