Update GEMINI.md

Author: SaptaDey

GEMINI.md

@@ -13,6 +13,16 @@ Adaptive-Graph-of-Thoughts-MCP-server
 - Prefer functional programming paradigms where appropriate.
 - All code should be compatible with TypeScript 5.0 and Node.js 18+.
 
+## Building and running:
+
+- Before submitting any changes, it is crucial to validate them by running the full preflight check. This command will build the repository, run all tests, check for type errors, and lint the code.
+
+To run the full suite of checks, execute the following command:
+```
+npm run preflight
+```
+This single command ensures that your changes meet all the quality gates of the project. While you can run the individual steps (build, test, typecheck, lint) separately, it is highly recommended to use npm run preflight to ensure a comprehensive validation.
+
 ## Coding Style:
 
 - Use 2 spaces for indentation.