fix(readme): Improve README documentation

changelog.md

@@ -1,5 +1,18 @@
 # Changelog
 
+## 2025-04-30 - 2.3.1 - fix(readme)
+Improve README documentation with detailed 'Why SmartExpect' benefits section
+
+- Added detailed 'Why SmartExpect' section outlining zero-config async support, modular footprint, enhanced messaging, rich built-in matchers, plugin extensibility, and TypeScript support
+- Clarified installation instructions regarding dependency setup
+- Updated changelog and commitinfo version to 2.3.1
+
+## 2025-04-30 - 2.3.1 - fix(readme)
+Improve README documentation with detailed 'Why SmartExpect' benefits section
+
+- Added a detailed section outlining zero-config async support, modular footprint, enhanced messaging, rich built-in matchers, plugin extensibility, and TypeScript support
+- Clarified installation instructions regarding dependency setup
+
 ## 2025-04-30 - 2.3.0 - feat(object-matchers)
 Add object key matchers: toHaveKeys and toHaveOwnKeys; remove obsolete roadmap plan file
 

readme.md

@@ -8,9 +8,19 @@ To install `@push.rocks/smartexpect`, use the following command in your terminal
 ```bash
 npm install @push.rocks/smartexpect --save
 ```
-
 This will add `@push.rocks/smartexpect` to your project's dependencies. Make sure you're inside your project directory before running this command.
 
+## Why SmartExpect?
+
+SmartExpect is designed to be a minimal, promise-first assertion library with clear, descriptive messaging and easy extensibility:
+
+- **Zero-config asynchronous support**: chain `.resolves` / `.rejects` directly off `expect()`, add timeouts with `.withTimeout(ms)`, and get clear errors if you mix sync matchers with non-Promises.
+- **Lean, modular footprint**: only depends on `fast-deep-equal`, `@push.rocks/smartpromise`, and `@push.rocks/smartdelay`; pure ESM, tree-shakable, works in Node & browser.
+- **Better out-of-the-box messaging**: automatic `.not` inversion (e.g. “Expected 5 not to be greater than 3”) and unified “Expected… / Received…” JSON diffs for object/array mismatches.
+- **Rich built-in matchers**: numbers (`toBeNaN`, `toBeWithinRange`), objects (`toHaveKeys`, `toHaveOwnKeys`, shorthand `toHaveOwnProperty`), strings/arrays (`toBeEmpty`, `toInclude`, `toHaveLength`), functions (`toThrowErrorMatching`, `toThrowErrorWithMessage`), dates, and more.
+- **Plugin-style extensibility**: add custom matchers with `expect.extend({ myMatcher })` without monkey-patching.
+- **First-class TypeScript support**: full `.d.ts` declarations, generic types for sync vs async chains, and autocomplete in editors.
+
 ## Usage
 
 `@push.rocks/smartexpect` is a TypeScript library designed to manage expectations in your code effectively, improving testing readability and maintainability. Below are various scenarios showcasing how to use this library effectively across both synchronous and asynchronous code paths.

ts/00_commitinfo_data.ts

@@ -3,6 +3,6 @@
  */
 export const commitinfo = {
   name: '@push.rocks/smartexpect',
-  version: '2.3.0',
+  version: '2.3.1',
   description: 'A testing library to manage expectations in code, offering both synchronous and asynchronous assertion methods.'
 }