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Commit b3aef30

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feat(@angular-devkit/schematics): add schematics to generate ai context files.
* `ng generate config ai` to prompt support tools. * `ng generate config ai --tool=gemini` to specify the tool. Supported ai tools: gemini, claude, copilot, windsurf, cursor.
1 parent 5d085ee commit b3aef30

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‎packages/angular_devkit/schematics/src/index.ts

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@@ -23,6 +23,7 @@ export * from './rules/base';
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export * from './rules/call';
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export * from './rules/move';
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export * from './rules/random';
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export * from './rules/rename';
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export * from './rules/schematic';
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export * from './rules/template';
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export * from './rules/url';

‎packages/angular_devkit/schematics/src/rules/move.ts

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@@ -10,6 +10,8 @@ import { join, normalize } from '@angular-devkit/core';
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import { Rule } from '../engine/interface';
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import { noop } from './base';
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export function move(from: string, to: string): Rule;
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export function move(to: string): Rule;
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export function move(from: string, to?: string): Rule {
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if (to === undefined) {
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to = from;
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/**
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* @license
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* Copyright Google LLC All Rights Reserved.
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*
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* Use of this source code is governed by an MIT-style license that can be
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* found in the LICENSE file at https://angular.dev/license
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*/
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import { Rule } from '../engine';
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import { posix as path } from 'node:path';
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export function rename(filePath: string, fromFileName: string, fileName: string): Rule {
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return (tree) => {
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tree.rename(path.join(filePath, fromFileName), path.join(filePath, fileName));
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return tree;
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};
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}
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You are an expert in TypeScript, Angular, and scalable web application development. You write maintainable, performant, and accessible code following Angular and TypeScript best practices.
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## TypeScript Best Practices
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- Use strict type checking
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- Prefer type inference when the type is obvious
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- Avoid the `any` type; use `unknown` when type is uncertain
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## Angular Best Practices
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- Always use standalone components over NgModules
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- Do NOT set `standalone: true` inside the `@Component`, `@Directive` and `@Pipe` decorators
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- Use signals for state management
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- Implement lazy loading for feature routes
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- Use `NgOptimizedImage` for all static images.
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- Do NOT use the `@HostBinding` and `@HostListener` decorators. Put host bindings inside the `host` object of the `@Component` or `@Directive` decorator instead
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## Components
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- Keep components small and focused on a single responsibility
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- Use `input()` and `output()` functions instead of decorators
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- Use `computed()` for derived state
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- Set `changeDetection: ChangeDetectionStrategy.OnPush` in `@Component` decorator
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- Prefer inline templates for small components
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- Prefer Reactive forms instead of Template-driven ones
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- Do NOT use `ngClass`, use `class` bindings instead
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- DO NOT use `ngStyle`, use `style` bindings instead
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## State Management
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- Use signals for local component state
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- Use `computed()` for derived state
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- Keep state transformations pure and predictable
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- Do NOT use `mutate` on signals, use `update` or `set` instead
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## Templates
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- Keep templates simple and avoid complex logic
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- Use native control flow (`@if`, `@for`, `@switch`) instead of `*ngIf`, `*ngFor`, `*ngSwitch`
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- Use the async pipe to handle observables
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## Services
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- Design services around a single responsibility
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- Use the `providedIn: 'root'` option for singleton services
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- Use the `inject()` function instead of constructor injection

‎packages/schematics/angular/config/index.ts

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@@ -14,6 +14,7 @@ import {
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filter,
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mergeWith,
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move,
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rename,
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strings,
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url,
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} from '@angular-devkit/schematics';
@@ -30,6 +31,8 @@ export default function (options: ConfigOptions): Rule {
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return addKarmaConfig(options);
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case ConfigType.Browserslist:
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return addBrowserslistConfig(options);
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case ConfigType.Ai:
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return addAiContextFile(options);
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default:
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throw new SchematicsException(`"${options.type}" is an unknown configuration file type.`);
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}
@@ -103,3 +106,50 @@ function addKarmaConfig(options: ConfigOptions): Rule {
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);
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});
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}
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function addAiContextFile(options: ConfigOptions): Rule {
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let fileName: string;
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let filePath: string;
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switch (options.tool) {
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case 'gemini':
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fileName = 'GEMINI.md';
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filePath = '.gemini';
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break;
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case 'copilot':
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fileName = 'copilot-instructions.md';
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filePath = '.github';
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break;
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case 'claude':
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fileName = 'CLAUDE.md';
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filePath = '.claude';
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break;
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case 'cursor':
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fileName = 'cursor.md';
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filePath = path.join('.cursor', 'rules');
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break;
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case 'windsurf':
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fileName = 'guidelines.md';
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filePath = path.join('.windsurf', 'rules');
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break;
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default:
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throw new SchematicsException(`Unsupported AI tool: ${options.tool}`);
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}
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return async (host) => {
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const workspace = await readWorkspace(host);
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const project = workspace.projects.get(options.project);
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if (!project) {
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throw new SchematicsException(`Project name "${options.project}" doesn't not exist.`);
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}
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const templateName = 'best-practices.md';
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return mergeWith(
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apply(url('./files'), [
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filter((p) => p.endsWith(`${templateName}.template`)),
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applyTemplates({}),
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move(filePath),
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rename(filePath, templateName, fileName),
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]),
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);
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};
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}

‎packages/schematics/angular/config/index_spec.ts

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@@ -9,7 +9,7 @@
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import { SchematicTestRunner, UnitTestTree } from '@angular-devkit/schematics/testing';
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import { Schema as ApplicationOptions } from '../application/schema';
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import { Schema as WorkspaceOptions } from '../workspace/schema';
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import { Schema as ConfigOptions, Type as ConfigType } from './schema';
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import { Schema as ConfigOptions, Type as ConfigType,ToolasConfigTool } from './schema';
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describe('Config Schematic', () => {
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const schematicRunner = new SchematicTestRunner(
@@ -32,12 +32,15 @@ describe('Config Schematic', () => {
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};
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let applicationTree: UnitTestTree;
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function runConfigSchematic(type: ConfigType): Promise<UnitTestTree> {
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function runConfigSchematic(type: ConfigType, tool?: ConfigTool): Promise<UnitTestTree>;
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function runConfigSchematic(type: ConfigType.Ai, tool: ConfigTool): Promise<UnitTestTree>;
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function runConfigSchematic(type: ConfigType, tool?: ConfigTool): Promise<UnitTestTree> {
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return schematicRunner.runSchematic<ConfigOptions>(
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'config',
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{
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project: 'foo',
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type,
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tool,
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},
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applicationTree,
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);
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expect(tree.readContent('projects/foo/.browserslistrc')).toContain('Chrome >=');
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});
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});
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describe(`when 'type' is 'ai'`, () => {
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it('should create a GEMINI.MD file', async () => {
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const tree = await runConfigSchematic(ConfigType.Ai, ConfigTool.Gemini);
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expect(tree.readContent('.gemini/GEMINI.md')).toContain('You are an expert in TypeScript');
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});
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it('should create a copilot-instructions.md file', async () => {
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const tree = await runConfigSchematic(ConfigType.Ai, ConfigTool.Copilot);
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expect(tree.readContent('.github/copilot-instructions.md')).toContain(
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'You are an expert in TypeScript',
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);
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});
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it('should create a cursor file', async () => {
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const tree = await runConfigSchematic(ConfigType.Ai, ConfigTool.Cursor);
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expect(tree.readContent('.cursor/rules/cursor.md')).toContain(
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'You are an expert in TypeScript',
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);
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});
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it('should create a windsurf file', async () => {
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const tree = await runConfigSchematic(ConfigType.Ai, ConfigTool.Windsurf);
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expect(tree.readContent('.windsurf/rules/guidelines.md')).toContain(
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'You are an expert in TypeScript',
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);
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});
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it('should create a claude file', async () => {
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const tree = await runConfigSchematic(ConfigType.Ai, ConfigTool.Claude);
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expect(tree.readContent('.claude/CLAUDE.md')).toContain('You are an expert in TypeScript');
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});
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});
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});

‎packages/schematics/angular/config/schema.json

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@@ -16,12 +16,21 @@
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"type": {
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"type": "string",
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"description": "Specifies the type of configuration file to generate.",
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"enum": ["karma", "browserslist"],
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"enum": ["karma", "browserslist", "ai"],
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"x-prompt": "Which type of configuration file would you like to create?",
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"$default": {
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"$source": "argv",
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"index": 0
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}
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},
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"tool": {
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"type": "string",
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"description": "Specifies the AI tool to configure when type is 'ai'.",
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"enum": ["gemini", "copilot", "claude", "cursor", "windsurf"],
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"x-prompt": {
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"message": "Which AI tool would you like to configure?",
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"when": "type === 'ai'"
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}
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}
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},
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"required": ["project", "type"]

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