docs: update changelog for PR #53

Author: github-actions[bot]

CHANGELOG.md

@@ -134,6 +134,34 @@ This Changelog uses the [Keep a Changelog](http://keepachangelog.com/) structure
 
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+- Added ability to auto-update the language definitions on settings change ([#53](https://github.com/yCodeTech/auto-comment-blocks/pull/53)) by @yCodeTech
+
+    This pull request introduces several improvements to how language comment block definitions are managed and updated in the extension. The most significant changes are the ability to auto update language definitions on settings change without requiring an extension host reload, the caching of configuration files for efficiency, and performance improvements. Below are the most important changes:
+
+    **Auto-Update Language Definitions:**
+
+    - Added a new `updateLanguageDefinitions` method to `Configuration`, allowing language comment block definitions to be updated at runtime without requiring an extension host reload.
+
+    - The extension now listens for changes to relevant configuration settings in the `activate` function and automatically updates language definitions and reconfigures the comment blocks as needed, removing the pop-up message and the requirement for an extension reload.
+
+    **Performance Improvements:**
+
+    - **Accidental cached data mutation prevention and unnecessary disk read improvements:**
+
+        - The `setLanguageConfiguration` method now deep-clones language configurations before modification to prevent accidental mutation of cached data.
+
+        - The default multi-line language configuration (`default-multi-line-config.json`) and the languages to skip (`skip-languages.jsonc`) files are now read once during initialisation and cached for later use, improving efficiency and reducing redundant disk reads on every loop iteration.
+
+    - **Writing of Language Definition Files and Logging Enhancements:**
+
+        - The extension no longer writes the current language definitions to JSON files in `production`, they are only written in `development` and `testing` modes for easier debugging and quick reference during development, and preventing unnecessary file writes in production.
+
+        - Refactored the debug logging in the `logDebugInfo` method to use the existing cached language definitions instead of reading from files, improving efficiency.
+
+    These changes collectively improve the maintainability, performance, and experience of the extension.
+
+<!-- end -->
+
 ### Changed
 
 - Refactored logging environment variables ([#43](https://github.com/yCodeTech/auto-comment-blocks/pull/43)) by @yCodeTech
@@ -255,7 +283,7 @@ This Changelog uses the [Keep a Changelog](http://keepachangelog.com/) structure
     VScode updated their types to include the LineComment typings and released 1.110 of @types/vscode package. So our temporary custom `LineComment` type and `LineCommentConfig` interface is now redundant.
     - Updated @types/vscode package to 1.110.
     - Removed the temporary `LineComment` type and `LineCommentConfig` interface, and removed the references in configuration file.
-          <!-- end -->
+      <!-- end -->
 
 ### Changed
 
@@ -267,15 +295,15 @@ This Changelog uses the [Keep a Changelog](http://keepachangelog.com/) structure
     - Consolidated multiple configuration change handlers into a single handler that checks for a list of settings requiring extension reload. If any are changed, a single reload prompt is shown using the new `showReloadMessage` helper function, reducing code duplication.
 
     - Improved performance and event handling to prevent memory leaks by properly disposing of old comment configurations.
-        <!-- end -->
+          <!-- end -->
 
 - Refactored configuration class ([#30](https://github.com/yCodeTech/auto-comment-blocks/pull/30)) by @yCodeTech
     - Extracted the logic for determining the appropriate Blade or HTML comment style into a new private method `getBladeOrHtmlComments`, simplifying the public API and improving clarity. The `setBladeComments` method now only sets the configuration and no longer returns values based on an `onStart` flag (the flag was removed in favour using the new private method directly).
 
     - Replaced repetitive code for adding custom single-line comment languages with a new private method `addCustomSingleLineLanguages`, reducing duplication and improving maintainability.
 
     - Replaced `var` with `let` for variable declarations in several places to align with modern best practices.
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+        <!-- end -->
 
 ## [1.1.14](https://github.com/yCodeTech/auto-comment-blocks/releases/tag/v1.1.14) - 2026-02-23