Release v0.4.0-alpha.0

README.md

@@ -1,6 +1,6 @@
 # KompKit
 
-[![Version](https://img.shields.io/badge/version-0.3.0--alpha.0-orange.svg)](https://github.com/Kompkit/KompKit/releases)
+[![Version](https://img.shields.io/badge/version-0.4.0--alpha.0-orange.svg)](https://github.com/Kompkit/KompKit/releases)
 [![Web CI](https://github.com/Kompkit/KompKit/actions/workflows/web.yml/badge.svg?branch=develop)](https://github.com/Kompkit/KompKit/actions/workflows/web.yml)
 [![Kotlin CI](https://github.com/Kompkit/KompKit/actions/workflows/android.yml/badge.svg?branch=develop)](https://github.com/Kompkit/KompKit/actions/workflows/android.yml)
 [![Flutter CI](https://github.com/Kompkit/KompKit/actions/workflows/flutter.yml/badge.svg?branch=develop)](https://github.com/Kompkit/KompKit/actions/workflows/flutter.yml)
@@ -60,6 +60,8 @@ KompKit provides essential utility functions that work seamlessly across Web (Ty
 - **🕐 debounce** - Delay function execution until after a wait period (prevents excessive API calls)
 - **📧 isEmail** - Validate email addresses with robust regex patterns
 - **💰 formatCurrency** - Format numbers as currency with full locale support
+- **📐 clamp** - Constrain a number within an inclusive [min, max] range
+- **⏱️ throttle** - Limit a function to execute at most once per wait period
 
 ### Key Features
 
@@ -95,7 +97,7 @@ Add to your `pubspec.yaml`:
 
 ```yaml
 dependencies:
-  kompkit_core: ^0.3.0-alpha.1
+  kompkit_core: ^0.4.0-alpha.0
 ```
 
 Then run:
@@ -129,40 +131,80 @@ Once installed, you can import and use KompKit utilities:
 **TypeScript/JavaScript:**
 
 ```typescript
-import { debounce, isEmail, formatCurrency } from "kompkit-core";
+import {
+  debounce,
+  isEmail,
+  formatCurrency,
+  clamp,
+  throttle,
+} from "kompkit-core";
+
+// Delay execution until typing stops
+const onSearch = debounce(
+  (query: string) => console.log("Search:", query),
+  300,
+);
+
+// Validate email
+console.log(isEmail("user@example.com")); // true
 
-const search = debounce((query: string) => {
-  console.log("Searching:", query);
-}, 300);
+// Format as currency
+console.log(formatCurrency(1234.56)); // "$1,234.56"
 
-console.log(isEmail("user@example.com")); // true
-console.log(formatCurrency(1234.56)); // "1.234,56 €"
+// Constrain a value to a range
+console.log(clamp(15, 0, 10)); // 10
+
+// Rate-limit a scroll handler
+const onScroll = throttle(() => console.log("scrollY:", window.scrollY), 200);
+window.addEventListener("scroll", onScroll);
 ```
 
 **Kotlin:**
 
 ```kotlin
 import com.kompkit.core.*
 
-val search = debounce<String>(300L, scope) { query ->
-    println("Searching: $query")
-}
+// Delay execution until typing stops
+val onSearch = debounce<String>(300L, scope) { query -> println("Search: $query") }
 
+// Validate email
 println(isEmail("user@example.com")) // true
-println(formatCurrency(1234.56)) // "1.234,56 €"
+
+// Format as currency
+println(formatCurrency(1234.56)) // "$1,234.56"
+
+// Constrain a value to a range
+println(clamp(15.0, 0.0, 10.0)) // 10.0
+
+// Rate-limit a scroll handler
+val onScroll = throttle<Int>(200L, scope) { pos -> println("scroll: $pos") }
 ```
 
 **Dart/Flutter:**
 
 ```dart
 import 'package:kompkit_core/kompkit_core.dart';
 
-final search = debounce<String>((String query) {
-  print('Searching: $query');
-}, const Duration(milliseconds: 300));
+// Delay execution until typing stops
+final onSearch = debounce<String>(
+  (query) => print('Search: $query'),
+  const Duration(milliseconds: 300),
+);
 
+// Validate email
 print(isEmail('user@example.com')); // true
-print(formatCurrency(1234.56)); // "1.234,56 €"
+
+// Format as currency
+print(formatCurrency(1234.56)); // "$1,234.56"
+
+// Constrain a value to a range
+print(clamp(15.0, 0.0, 10.0)); // 10.0
+
+// Rate-limit a scroll handler
+final onScroll = throttle<double>(
+  (offset) => print('scroll: $offset'),
+  const Duration(milliseconds: 200),
+);
 ```
 
 ## Documentation
@@ -211,7 +253,7 @@ KompKit/
 
 ## Version Information
 
-- **Current Version**: `0.3.0-alpha`
+- **Current Version**: `0.4.0-alpha.0`
 - **Minimum Requirements**:
   - Node.js 20+ (Web)
   - JDK 17+ (Android)
@@ -225,7 +267,7 @@ KompKit/
 KompKit is currently in **alpha**. This means:
 
 - **APIs may change** between alpha versions without a deprecation period.
-- **Pin to exact versions** in production: `"kompkit-core": "0.3.0-alpha.1"` / `kompkit_core: 0.3.0-alpha.1`.
+- **Pin to exact versions** in production: `"kompkit-core": "0.4.0-alpha.0"` / `kompkit_core: 0.4.0-alpha.0`.
 - **Breaking changes** will be documented in [CHANGELOG.md](./docs/CHANGELOG.md) with migration notes.
 - Once `1.0.0` is released, the project will follow strict [Semantic Versioning](https://semver.org/): breaking changes only in major versions.
 
@@ -237,6 +279,8 @@ KompKit aims for **conceptual parity**, not syntactic identity. The following di
 | ---------------- | -------- | -------------------------------------------------------------- | ----------------------------------------------------------- |
 | `debounce`       | Kotlin   | Requires `CoroutineScope` parameter                            | Structured concurrency — no global timer API on JVM         |
 | `debounce`       | Kotlin   | Action is first parameter, scope is last                       | Enables idiomatic trailing lambda syntax                    |
+| `throttle`       | Kotlin   | Requires `CoroutineScope` parameter                            | Same structured concurrency constraint as `debounce`        |
+| `throttle`       | Dart     | `wait` is a `Duration`, not a number                           | Idiomatic Dart — no bare millisecond integers               |
 | `formatCurrency` | Kotlin   | Accepts `String` locale, converts to `Locale` internally       | JVM `NumberFormat` requires `java.util.Locale`              |
 | `formatCurrency` | Dart     | Accepts BCP 47 locale, normalizes hyphen→underscore internally | `intl` package uses underscore-separated locale identifiers |
 

SECURITY.md

@@ -4,7 +4,8 @@
 
 | Version         | Supported              |
 | --------------- | ---------------------- |
-| `0.3.0-alpha.1` | ✅ Current             |
+| `0.4.0-alpha.0` | ✅ Current             |
+| `0.3.0-alpha.1` | ❌ No longer supported |
 | `0.2.0-alpha.0` | ❌ No longer supported |
 | `0.1.0-alpha`   | ❌ No longer supported |
 

docs/ARCHITECTURE.md

@@ -45,16 +45,18 @@ All modules implement identical functionality:
 - **debounce**: Function execution delay with cancellation
 - **isEmail**: Email validation using regex patterns
 - **formatCurrency**: Localized currency formatting
+- **clamp**: Constrain a number within an inclusive [min, max] range
+- **throttle**: Limit function execution to at most once per wait period
 
 ## API Parity Contract
 
 This section defines the formal contract for cross-platform API consistency in KompKit.
 
 ### What is Guaranteed
 
-- **Function names** are identical across all platforms (`debounce`, `isEmail`, `formatCurrency`).
+- **Function names** are identical across all platforms (`debounce`, `isEmail`, `formatCurrency`, `clamp`, `throttle`).
 - **Behavioral semantics** are identical: given the same inputs, all platforms produce the same observable output.
-- **Default values** are identical: `wait = 250ms`, `currency = "EUR"`, `locale = "en-US"`.
+- **Default values** are identical: `wait = 250ms`, `currency = "USD"`, `locale = "en-US"`.
 - **Error handling philosophy** is consistent: invalid inputs that cannot produce a meaningful result throw/throw-equivalent errors. Silent fallbacks are not permitted.
 - **Cancel capability**: `debounce` returns an object with a `cancel()` method on all platforms, allowing callers to discard pending executions (required for safe use in component lifecycles).
 
@@ -70,9 +72,11 @@ This section defines the formal contract for cross-platform API consistency in K
 Every utility follows the same mental model regardless of platform:
 
 ```
-debounce(action, options)  → Debounced<T>  (with .cancel())
-isEmail(value)             → Boolean
-formatCurrency(amount, options) → String
+debounce(action, options)         → Debounced<T>  (with .cancel())
+isEmail(value)                    → Boolean
+formatCurrency(amount, options)   → String
+clamp(value, min, max)            → Number
+throttle(fn, wait)                → Throttled<T>  (with .cancel())
 ```
 
 A developer familiar with the TypeScript API should be able to use the Kotlin or Dart API with only idiomatic adjustments — not conceptual re-learning.
@@ -120,9 +124,21 @@ export function isEmail(value: string): boolean;
 
 export function formatCurrency(
   amount: number,
-  currency?: string, // default: "EUR"
+  currency?: string, // default: "USD"
   locale?: string, // default: "en-US"
 ): string;
+
+export function clamp(value: number, min: number, max: number): number;
+
+export interface Throttled<T extends (...args: any[]) => void> {
+  (...args: Parameters<T>): void;
+  cancel(): void;
+}
+
+export function throttle<T extends (...args: any[]) => void>(
+  fn: T,
+  wait: number, // must be > 0
+): Throttled<T>;
 ```
 
 **Kotlin:**
@@ -143,9 +159,22 @@ fun isEmail(value: String): Boolean
 
 fun formatCurrency(
   amount: Double,
-  currency: String = "EUR",
+  currency: String = "USD",
   locale: String = "en-US",  // converted internally to java.util.Locale
 ): String
+
+fun clamp(value: Double, min: Double, max: Double): Double
+
+class Throttled<T>(private val invoke: (T) -> Unit) {
+  operator fun invoke(value: T): Unit
+  fun cancel(): Unit
+}
+
+fun <T> throttle(
+  waitMs: Long,           // must be > 0
+  scope: CoroutineScope,  // platform constraint: structured concurrency
+  action: (T) -> Unit,
+): Throttled<T>
 ```
 
 **Dart:**
@@ -165,9 +194,21 @@ bool isEmail(String value);
 
 String formatCurrency(
   num amount, {
-  String currency = "EUR",
+  String currency = "USD",
   String locale = "en-US",
 });
+
+double clamp(double value, double min, double max);
+
+class Throttled<T> {
+  void call(T arg);
+  void cancel();
+}
+
+Throttled<T> throttle<T>(
+  void Function(T) fn,
+  Duration wait, // must be > Duration.zero
+);
 ```
 
 ### Platform-Specific Adaptations
@@ -180,20 +221,26 @@ While maintaining API consistency, we leverage platform strengths:
 - **setTimeout/clearTimeout** for timing control
 - **Intl.NumberFormat** for currency formatting
 - **RegExp** for email validation
+- **Math.min/Math.max** for clamp
+- **setTimeout/clearTimeout** for throttle timer
 
 #### Kotlin Implementation
 
 - **Coroutines** for asynchronous debounce operations
 - **Job cancellation** for timing control
 - **NumberFormat/Currency** for localized formatting
 - **Regex** for email validation
+- **Double.coerceIn** for clamp
+- **Coroutine delay + Job** for throttle wait period
 
 #### Dart/Flutter Implementation
 
 - **Timer** for debounce scheduling and cancellation
 - **intl package** (`NumberFormat.currency`) for localized formatting
 - **RegExp** for email validation
 - **Null safety** with full type-safe APIs
+- **num.clamp** for clamp
+- **Timer** for throttle scheduling (same as debounce)
 
 ## Build System Architecture
 
@@ -272,16 +319,20 @@ android.yml:
 
 ```
 packages/core/web/tests/
-└── core.test.ts              # All utility tests
+├── core.test.ts              # debounce, isEmail, formatCurrency tests
+├── clamp.test.ts             # clamp unit tests
+└── throttle.test.ts          # throttle unit tests
 
 packages/core/android/src/test/kotlin/com/kompkit/core/
-└── CoreTests.kt              # All utility tests
+└── CoreTests.kt              # All utility tests (incl. ThrottleTests, ClampTests)
 
 packages/core/flutter/test/
 ├── kompkit_core_test.dart     # Integration tests
 ├── debounce_test.dart         # Debounce unit tests
 ├── validate_test.dart         # Validation unit tests
-└── format_test.dart           # Formatting unit tests
+├── format_test.dart           # Formatting unit tests
+├── clamp_test.dart            # Clamp unit tests
+└── throttle_test.dart         # Throttle unit tests
 ```
 
 ### Test Coverage

docs/CHANGELOG.md

@@ -7,6 +7,42 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.4.0-alpha.0] - 2026-02-28
+
+### Added
+
+- **`clamp` utility** across all platforms — constrain a number within an inclusive `[min, max]` range
+  - TypeScript: `clamp(value: number, min: number, max: number): number`
+  - Kotlin: `clamp(value: Double, min: Double, max: Double): Double`
+  - Dart: `clamp(double value, double min, double max): double`
+  - Throws `RangeError` / `IllegalArgumentException` / `ArgumentError` if `min > max` or any argument is non-finite
+  - Exported from all public entry points; full unit test coverage on all platforms
+
+- **`throttle` utility** across all platforms — limit a function to execute at most once per wait period
+  - TypeScript: `throttle<T>(fn: T, wait: number): T & { cancel(): void }`
+  - Kotlin: `throttle<T>(waitMs: Long, scope: CoroutineScope, action: (T) -> Unit): Throttled<T>`
+  - Dart: `throttle<T>(void Function(T) fn, Duration wait): Throttled<T>`
+  - First call executes immediately; subsequent calls within the wait period are ignored
+  - `cancel()` resets internal state with no pending execution firing
+  - Throws `Error` / `IllegalArgumentException` / `ArgumentError` if `wait <= 0`
+  - Exported from all public entry points; full unit test coverage on all platforms
+
+### Changed
+
+- **`formatCurrency` default currency**: Changed from `EUR` to `USD` across all platforms (TypeScript, Kotlin, Dart)
+- **`formatCurrency` finite validation**: Added validation that throws on `NaN` and `Infinity` amounts across all platforms
+  - TypeScript: throws `RangeError`
+  - Kotlin: throws `IllegalArgumentException`
+  - Dart: throws `ArgumentError`
+- **Documentation**: Updated all guides (getting-started, web, android, flutter, ARCHITECTURE, recipes, FAQ) to cover `clamp` and `throttle`
+- **Documentation**: Corrected `formatCurrency` examples to reflect `USD` default
+- **Documentation**: Added Platform Differences section to npm README documenting Dart single-argument debounce limitation and other divergences
+- **Packaging**: Clarified that `kompkit-core` ships both ESM and CommonJS builds (not ESM-only)
+
+### Fixed
+
+- Documentation inconsistency where examples showed `USD` but default was `EUR`
+
 ## [0.3.0-alpha] - 2026-02-09
 
 ### Changed