Addressing code review feedback.

Author: desrosj

tools/gutenberg/checkout.js

@@ -156,14 +156,13 @@ async function main( force ) {
 	// Fetch and checkout target ref
 	console.log( `\n📡 Fetching and checking out: ${ ref }` );
 	try {
-		// Fetch the specific ref (works for branches, tags, and commit hashes)
+		// Fetch the specific ref (works for branches, tags, and commit hashes).
 		await exec( 'git', [ 'fetch', '--depth', '1', 'origin', ref ], {
 			cwd: gutenbergDir,
 		} );
 
 		if ( force ) {
-			// Hard-reset the index and working tree to FETCH_HEAD, discarding
-			// any local modifications. This is the reliable path for --force.
+			// Hard-reset the index and working tree to FETCH_HEAD, discarding any local modifications.
 			await exec( 'git', [ 'reset', '--hard', 'FETCH_HEAD' ], {
 				cwd: gutenbergDir,
 			} );

tools/gutenberg/utils.js

@@ -16,8 +16,6 @@ const path = require( 'path' );
 const { spawnSync } = require( 'child_process' );
 const dotenv = require( 'dotenv' );
 const dotenvExpand = require( 'dotenv-expand' );
-
-// Paths
 const rootDir = path.resolve( __dirname, '../..' );
 const gutenbergDir = path.join( rootDir, 'gutenberg' );
 
@@ -42,7 +40,7 @@ const gutenbergRepoHashFile = path.join( rootDir, '.gutenberg-repo-hash' );
  * Directories inside gutenberg/ to exclude when hashing.
  * These are build artefacts or dependency caches, not source files.
  */
-const DIR_HASH_EXCLUDE = new Set( [ 'build', 'node_modules', '.git' ] );
+const DIR_HASH_EXCLUDE = new Set( [ '.git', 'node_modules', 'phpunit', 'platform-docs', 'tests', 'vendor' ] );
 
 // Load .env so GUTENBERG_LOCAL_REPO and other vars are available regardless
 // of how this module is invoked (grunt task, direct node call, postinstall).