docs: highlight project-centric design philosophy

Author: johnsoncodehk

README.md

@@ -23,14 +23,15 @@ TSSLint eliminates this overhead by running directly as a `tsserver` plugin. By
 
 ## Key Features
 
+*   **Project-Centric**: Treats the **Project (tsconfig)** as a first-class citizen rather than individual files. This aligns with TypeScript's internal architecture, enabling efficient cross-file type analysis and seamless support for complex monorepos.
 *   **Zero Assumptions**: Comes with no built-in rules. It does not enforce any specific coding style or patterns, leaving full control to the developer.
 *   **High Performance**: Runs as a `tsserver` plugin, sharing the existing `TypeChecker` instance to avoid redundant parsing and type-checking.
 *   **Low Noise**: Violations are reported as "Message" diagnostics, ensuring they don't interfere with actual compiler errors or warnings.
 *   **Direct AST Access**: Rule authoring uses native TypeScript APIs directly, without unnecessary abstraction layers.
 
 ## How It Works
 
-TSSLint integrates into `tsserver` via the TypeScript plugin system, leveraging the semantic information already computed by your editor.
+TSSLint integrates into `tsserver` via the TypeScript plugin system, leveraging the semantic information already computed by your editor. Because TSSLint operates at the project level, it naturally understands the relationships between files defined in your `tsconfig.json`, allowing for more accurate and performant diagnostics compared to file-based linters.
 
 <p align="center">
   <img src="architecture.png" alt="TSSLint Architecture Diagram" width="700">