# Agent Guidelines for NLS Guilloche Generator

**IMPORTANT**: This is an archived Angular 6 project. We maintain it for running purposes only - no development, upgrades, or new features. Never run npm commands directly; always use the Makefile/nix shell wrapper.

## Build/Lint/Test Commands

- **Build app**: `npm run build`
- **Build library**: `npm run build:library`
- **Start dev server**: `npm start`
- **Lint**: `npm run lint`
- **Run all tests**: `npm run test`
- **Run single test**: `ng test --include="**/specific-test.spec.ts"`
- **E2E tests**: `npm run e2e`

## Code Style Guidelines

### Formatting
- 2-space indentation
- Single quotes for strings
- Semicolons always
- Max line length: 140 characters
- No trailing whitespace
- Insert final newline in files

### TypeScript/Angular
- Target: ES5
- Use `const` instead of `let` when possible
- Arrow return shorthand
- Interface over type literal
- No unused expressions
- No console.log (except debug/info/time/timeEnd/trace)
- Component class suffix required
- Import spacing required

### Naming Conventions
- **Components**: PascalCase + `Component` suffix (e.g., `AppComponent`)
- **Services**: PascalCase + `Service` suffix (e.g., `NlsMathService`)
- **Models**: PascalCase + `.model` suffix (e.g., `point.model.ts`)
- **Files**: kebab-case for components, camelCase for services/models
- **Properties/Methods**: camelCase

### Member Ordering
1. Static fields
2. Instance fields
3. Static methods
4. Instance methods

### Imports
- Angular imports first
- Third-party imports second
- Local imports last
- Use relative imports (`./` or `../`)

### Error Handling
- Follow standard TypeScript practices
- Use appropriate Angular error handling patterns