update readme with nix setup and disclaimer, increase scale max to 10

.nvmrc

@@ -0,0 +1 @@
+10.24.1

AGENTS.md

@@ -0,0 +1,56 @@
+# 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

Makefile

@@ -0,0 +1,12 @@
+.PHONY: start build help
+
+start:
+	NIXPKGS_ALLOW_INSECURE=1 nix-shell --run "npm start"
+
+build:
+	NIXPKGS_ALLOW_INSECURE=1 nix-shell --run "npm run build"
+
+help:
+	@echo "Available commands:"
+	@echo "  start  - Start the development server"
+	@echo "  build  - Build the project for production"

README.md

@@ -15,10 +15,21 @@
 
 ---
 
-## Rquirements
+## Requirements
 
-- Node.js
+- Node.js 10.24.1 (insecure EOL version, provided without warranty)
 - Angular CLI
+- Nix (for reproducible development environment)
+
+## Development Setup
+
+This project uses Nix for a reproducible development environment.
+
+1. Enter the Nix shell: `nix-shell`
+2. Install dependencies: `npm install`
+3. Start development: `make start` or `npm run start`
+
+**Disclaimer:** This software is provided without any warranty. Use at your own risk.
 
 ## NPM Scripts
 
@@ -30,9 +41,9 @@
 
 ## Development server
 
-Download dependencies with `npm i` or `yarn`.
+After entering the Nix shell, download dependencies with `npm install`.
 
-Run `npm run start` for a dev server. Browser opens and navigates automatically to `http://localhost:4200/`. The app will automatically reload if you change any of the source files.
+Run `make start` or `npm run start` for a dev server. Browser opens and navigates automatically to `http://localhost:4200/`. The app will automatically reload if you change any of the source files.
 
 ## Build
 

projects/nls-guilloche/src/nls/models/matrix.model.ts

@@ -0,0 +1,26 @@
+/**
+ * Copyright (C) 2018 Michael Czechowski <mail@dailysh.it>
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; version 2.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 51
+ * Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+import { Point } from './point.model';
+
+export interface Matrix {
+  start: Point;
+  end: Point;
+  center: Point;
+  width: number;
+  height: number;
+  unit?: number;
+}

shell.nix

@@ -0,0 +1,25 @@
+{ pkgs ? import <nixpkgs> {} }:
+
+let
+  lib = import <nixpkgs/lib>;
+  buildNodeJs = pkgs.callPackage "${<nixpkgs>}/pkgs/development/web/nodejs/nodejs.nix" {
+    python = pkgs.python3;
+  };
+
+  nodejsVersion = lib.fileContents ./.nvmrc;
+
+  nodejs = buildNodeJs {
+    enableNpm = true;
+    version = nodejsVersion;
+    sha256 = "032801kg24j04xmf09m0vxzlcz86sv21s24lv9l4cfv08k1c4byp";
+  };
+
+  # Overlay to use custom nodejs for nodePackages
+  customPkgs = pkgs // { inherit nodejs; };
+
+in customPkgs.mkShell {
+  buildInputs = with customPkgs; [
+    nodejs
+    nodePackages."@angular/cli"
+  ];
+}

src/app/forms/config.form.ts

@@ -47,7 +47,7 @@ export let ConfigForm: FormGroup = fb.group({
   ])),
   scale: fb.control('', Validators.compose([
     Validators.min(0),
-    Validators.max(1)
+    Validators.max(10)
   ])),
   stroke: fb.control('', Validators.compose([
     Validators.min(0.1),

src/app/forms/preset.form.ts

@@ -0,0 +1,23 @@
+/**
+ * Copyright (C) 2018 Michael Czechowski <mail@dailysh.it>
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; version 2.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 51
+ * Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+import { FormBuilder, FormGroup, Validators } from '@angular/forms';
+
+const fb = new FormBuilder();
+
+export let PresetForm: FormGroup = fb.group({
+  canvas: fb.control('')
+});

src/app/presets/canvas.preset.ts

@@ -0,0 +1,15 @@
+export const CanvasPresets = [
+  {
+    title: 'Visitenkarte (hochkant)',
+    defaults: {
+      canvas: {
+        width: 284,
+        height: 482
+      },
+      margin: {
+        x: 28,
+        y: 272
+      }
+    }
+  }
+];