feat(ipuaro): add working demo project examples

Added comprehensive demo project showcasing ipuaro capabilities:

New Files:
- examples/demo-project/: Complete TypeScript demo application
  - src/: User management, auth, validation, logging (336 LOC)
  - tests/: Vitest unit tests for UserService
  - Configuration: package.json, tsconfig.json, .ipuaro.json

Demo Features:
- UserService with CRUD operations
- AuthService with login/logout/verify
- Validation utilities (email, password)
- Logger utility with multiple log levels
- TypeScript types and interfaces
- Intentional TODOs (2) and FIXMEs (1) for tool demonstration

Documentation:
- README.md: Detailed usage guide with example queries
- EXAMPLE_CONVERSATIONS.md: Realistic conversation scenarios
- Tool demonstration scenarios (bug fix, refactoring, features)
- Workflow examples (security audit, optimization, code review)

Updated:
- packages/ipuaro/README.md: Added Quick Start section linking to examples

Project Statistics:
- 12 files total
- 336 lines of TypeScript code
- 7 source modules demonstrating various patterns
- Full test coverage examples
- Demonstrates all 18 tools capabilities

This completes the "Examples working" requirement for v1.0.0

packages/ipuaro/examples/demo-project/src/auth/service.ts

@@ -0,0 +1,85 @@
+/**
+ * Authentication service
+ */
+
+import type { User, AuthToken } from "../types/user"
+import { UserService } from "../services/user"
+import { createLogger } from "../utils/logger"
+
+const logger = createLogger("AuthService")
+
+export class AuthService {
+    private tokens: Map<string, AuthToken> = new Map()
+
+    constructor(private userService: UserService) {}
+
+    async login(email: string, password: string): Promise<AuthToken> {
+        logger.info("Login attempt", { email })
+
+        // Get user
+        const user = await this.userService.getUserByEmail(email)
+        if (!user) {
+            logger.warn("Login failed - user not found", { email })
+            throw new Error("Invalid credentials")
+        }
+
+        // TODO: Implement actual password verification
+        // For demo purposes, we just check if password is provided
+        if (!password) {
+            logger.warn("Login failed - no password", { email })
+            throw new Error("Invalid credentials")
+        }
+
+        // Generate token
+        const token = this.generateToken(user)
+        this.tokens.set(token.token, token)
+
+        logger.info("Login successful", { userId: user.id })
+        return token
+    }
+
+    async logout(tokenString: string): Promise<void> {
+        logger.info("Logout", { token: tokenString.substring(0, 10) + "..." })
+
+        const token = this.tokens.get(tokenString)
+        if (!token) {
+            throw new Error("Invalid token")
+        }
+
+        this.tokens.delete(tokenString)
+        logger.info("Logout successful", { userId: token.userId })
+    }
+
+    async verifyToken(tokenString: string): Promise<User> {
+        logger.debug("Verifying token")
+
+        const token = this.tokens.get(tokenString)
+        if (!token) {
+            throw new Error("Invalid token")
+        }
+
+        if (token.expiresAt < new Date()) {
+            this.tokens.delete(tokenString)
+            throw new Error("Token expired")
+        }
+
+        const user = await this.userService.getUserById(token.userId)
+        if (!user) {
+            throw new Error("User not found")
+        }
+
+        return user
+    }
+
+    private generateToken(user: User): AuthToken {
+        const token = `tok_${Date.now()}_${Math.random().toString(36).substring(7)}`
+        const expiresAt = new Date()
+        expiresAt.setHours(expiresAt.getHours() + 24) // 24 hours
+
+        return {
+            token,
+            expiresAt,
+            userId: user.id
+        }
+    }
+}

packages/ipuaro/examples/demo-project/src/index.ts

@@ -0,0 +1,48 @@
+/**
+ * Demo application entry point
+ */
+
+import { UserService } from "./services/user"
+import { AuthService } from "./auth/service"
+import { createLogger } from "./utils/logger"
+
+const logger = createLogger("App")
+
+async function main(): Promise<void> {
+    logger.info("Starting demo application")
+
+    // Initialize services
+    const userService = new UserService()
+    const authService = new AuthService(userService)
+
+    try {
+        // Create a demo user
+        const user = await userService.createUser({
+            email: "demo@example.com",
+            name: "Demo User",
+            password: "password123",
+            role: "admin"
+        })
+
+        logger.info("Demo user created", { userId: user.id })
+
+        // Login
+        const token = await authService.login("demo@example.com", "password123")
+        logger.info("Login successful", { token: token.token })
+
+        // Verify token
+        const verifiedUser = await authService.verifyToken(token.token)
+        logger.info("Token verified", { userId: verifiedUser.id })
+
+        // Logout
+        await authService.logout(token.token)
+        logger.info("Logout successful")
+    } catch (error) {
+        logger.error("Application error", error as Error)
+        process.exit(1)
+    }
+
+    logger.info("Demo application finished")
+}
+
+main()

packages/ipuaro/examples/demo-project/src/services/user.ts

@@ -0,0 +1,102 @@
+/**
+ * User service - handles user-related operations
+ */
+
+import type { User, CreateUserDto, UpdateUserDto } from "../types/user"
+import { isValidEmail, isStrongPassword, ValidationError } from "../utils/validation"
+import { createLogger } from "../utils/logger"
+
+const logger = createLogger("UserService")
+
+export class UserService {
+    private users: Map<string, User> = new Map()
+
+    async createUser(dto: CreateUserDto): Promise<User> {
+        logger.info("Creating user", { email: dto.email })
+
+        // Validate email
+        if (!isValidEmail(dto.email)) {
+            throw new ValidationError("Invalid email address", "email")
+        }
+
+        // Validate password
+        if (!isStrongPassword(dto.password)) {
+            throw new ValidationError("Password must be at least 8 characters", "password")
+        }
+
+        // Check if user already exists
+        const existingUser = Array.from(this.users.values()).find(
+            (u) => u.email === dto.email
+        )
+
+        if (existingUser) {
+            throw new Error("User with this email already exists")
+        }
+
+        // Create user
+        const user: User = {
+            id: this.generateId(),
+            email: dto.email,
+            name: dto.name,
+            role: dto.role || "user",
+            createdAt: new Date(),
+            updatedAt: new Date()
+        }
+
+        this.users.set(user.id, user)
+        logger.info("User created", { userId: user.id })
+
+        return user
+    }
+
+    async getUserById(id: string): Promise<User | null> {
+        logger.debug("Getting user by ID", { userId: id })
+        return this.users.get(id) || null
+    }
+
+    async getUserByEmail(email: string): Promise<User | null> {
+        logger.debug("Getting user by email", { email })
+        return Array.from(this.users.values()).find((u) => u.email === email) || null
+    }
+
+    async updateUser(id: string, dto: UpdateUserDto): Promise<User> {
+        logger.info("Updating user", { userId: id })
+
+        const user = this.users.get(id)
+        if (!user) {
+            throw new Error("User not found")
+        }
+
+        const updated: User = {
+            ...user,
+            ...(dto.name && { name: dto.name }),
+            ...(dto.role && { role: dto.role }),
+            updatedAt: new Date()
+        }
+
+        this.users.set(id, updated)
+        logger.info("User updated", { userId: id })
+
+        return updated
+    }
+
+    async deleteUser(id: string): Promise<void> {
+        logger.info("Deleting user", { userId: id })
+
+        if (!this.users.has(id)) {
+            throw new Error("User not found")
+        }
+
+        this.users.delete(id)
+        logger.info("User deleted", { userId: id })
+    }
+
+    async listUsers(): Promise<User[]> {
+        logger.debug("Listing all users")
+        return Array.from(this.users.values())
+    }
+
+    private generateId(): string {
+        return `user_${Date.now()}_${Math.random().toString(36).substring(7)}`
+    }
+}

packages/ipuaro/examples/demo-project/src/types/user.ts

@@ -0,0 +1,32 @@
+/**
+ * User-related type definitions
+ */
+
+export interface User {
+    id: string
+    email: string
+    name: string
+    role: UserRole
+    createdAt: Date
+    updatedAt: Date
+}
+
+export type UserRole = "admin" | "user" | "guest"
+
+export interface CreateUserDto {
+    email: string
+    name: string
+    password: string
+    role?: UserRole
+}
+
+export interface UpdateUserDto {
+    name?: string
+    role?: UserRole
+}
+
+export interface AuthToken {
+    token: string
+    expiresAt: Date
+    userId: string
+}

packages/ipuaro/examples/demo-project/src/utils/logger.ts

@@ -0,0 +1,41 @@
+/**
+ * Simple logging utility
+ */
+
+export type LogLevel = "debug" | "info" | "warn" | "error"
+
+export class Logger {
+    constructor(private context: string) {}
+
+    debug(message: string, meta?: Record<string, unknown>): void {
+        this.log("debug", message, meta)
+    }
+
+    info(message: string, meta?: Record<string, unknown>): void {
+        this.log("info", message, meta)
+    }
+
+    warn(message: string, meta?: Record<string, unknown>): void {
+        this.log("warn", message, meta)
+    }
+
+    error(message: string, error?: Error, meta?: Record<string, unknown>): void {
+        this.log("error", message, { ...meta, error: error?.message })
+    }
+
+    private log(level: LogLevel, message: string, meta?: Record<string, unknown>): void {
+        const timestamp = new Date().toISOString()
+        const logEntry = {
+            timestamp,
+            level,
+            context: this.context,
+            message,
+            ...(meta && { meta })
+        }
+        console.log(JSON.stringify(logEntry))
+    }
+}
+
+export function createLogger(context: string): Logger {
+    return new Logger(context)
+}

packages/ipuaro/examples/demo-project/src/utils/validation.ts

@@ -0,0 +1,28 @@
+/**
+ * Validation utilities
+ */
+
+export function isValidEmail(email: string): boolean {
+    const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/
+    return emailRegex.test(email)
+}
+
+export function isStrongPassword(password: string): boolean {
+    // TODO: Add more sophisticated password validation
+    return password.length >= 8
+}
+
+export function sanitizeInput(input: string): string {
+    // FIXME: This is a basic implementation, needs XSS protection
+    return input.trim().replace(/[<>]/g, "")
+}
+
+export class ValidationError extends Error {
+    constructor(
+        message: string,
+        public field: string
+    ) {
+        super(message)
+        this.name = "ValidationError"
+    }
+}