diff --git a/Gemfile b/Gemfile
index b9f579491..105a4ff55 100644
--- a/Gemfile
+++ b/Gemfile
@@ -23,11 +23,11 @@ end
 group :test, :development do
   gem 'classifier-reborn', github: 'jekyll/classifier-reborn'
   gem 'github-pages-health-check'
-  #gem 'gsl', github: 'SciRuby/rb-gsl' Not compatible with Ruby 3.0
-  gem 'numo-narray'
-  gem 'numo-linalg'
+  # gem 'gsl', github: 'SciRuby/rb-gsl' Not compatible with Ruby 3.0
   gem 'html-proofer'
   gem 'nokogiri'
+  gem 'numo-linalg'
+  gem 'numo-narray'
   gem 'pry'
   gem 'rake'
   gem 'rspec'
diff --git a/Rakefile b/Rakefile
index 2e2a1cf1f..7aedd19a9 100644
--- a/Rakefile
+++ b/Rakefile
@@ -56,7 +56,7 @@ task :format_yaml do
     next unless content.match?(Jekyll::Document::YAML_FRONT_MATTER_REGEXP)
 
     parts = content.split Jekyll::Document::YAML_FRONT_MATTER_REGEXP
-    yaml = YAML.load_file(parts[1], permitted_classes: [Psych, Symbol])
+    yaml = YAML.load(parts[1], permitted_classes: [Psych, Symbol])
     %w[title description].each { |key| yaml[key] = strip_whitespace(yaml[key]) if yaml[key] }
     %w[tags category categories post_format].each { |key| yaml.delete(key) }
     File.write(path, "#{yaml.to_yaml(line_width: -1)}---\n\n#{parts[4]}")
diff --git a/script/build-related-posts b/script/build-related-posts
index 62c826229..f3251d4bb 100755
--- a/script/build-related-posts
+++ b/script/build-related-posts
@@ -9,7 +9,7 @@ require 'psych'
 options = {
   'source' => File.expand_path('../', __dir__),
   'lsi' => true,
-  'verbose' => true,
+  'verbose' => true
 }
 
 ignore_list = [
@@ -17,7 +17,7 @@ ignore_list = [
   '_posts/2012-12-26-securing-the-status-quo.md'
 ]
 
-Jekyll.logger.info "Building site"
+Jekyll.logger.info 'Building site'
 config = Jekyll.configuration(options)
 site = Jekyll::Site.new(config)
 
@@ -25,7 +25,7 @@ site.reset
 site.read
 site.posts.docs.delete_if { |post| ignore_list.include?(post.relative_path) || post.data['archived'] }
 
-Jekyll.logger.info "Building related posts"
+Jekyll.logger.info 'Building related posts'
 relations = {}
 site.posts.docs.each do |post|
   relations[post.relative_path] = post.related_posts.map(&:relative_path)
diff --git a/script/lint-front-matter b/script/lint-front-matter
index 6e91d4afb..cd142b1fe 100755
--- a/script/lint-front-matter
+++ b/script/lint-front-matter
@@ -6,12 +6,19 @@ require 'open3'
 
 exitstatus = 0
 
+# Pre-collect all files to avoid re-reading during iteration
+files_with_yaml = []
 Dir['*/**.md'].each do |path|
   content = File.read(path)
   next unless content.match?(Jekyll::Document::YAML_FRONT_MATTER_REGEXP)
 
   parts = content.split Jekyll::Document::YAML_FRONT_MATTER_REGEXP
-  output, status = Open3.capture2e('yamllint', '-', '-c', '.yamllint.yml', '-f', 'colored', stdin_data: parts[1])
+  files_with_yaml << [path, parts[1]]
+end
+
+# Process all collected files
+files_with_yaml.each do |path, yaml_content|
+  output, status = Open3.capture2e('yamllint', '-', '-c', '.yamllint.yml', '-f', 'colored', stdin_data: yaml_content)
   next if status.exitstatus.zero?
 
   puts path
diff --git a/spec/amazon_link_check.rb b/spec/amazon_link_check.rb
index 36cfcc280..a72ca7133 100644
--- a/spec/amazon_link_check.rb
+++ b/spec/amazon_link_check.rb
@@ -6,18 +6,18 @@ def affiliate_id
   end
 
   def uri
-    URI.parse(@link.href)
+    @uri ||= URI.parse(@link.href)
   end
 
   def params
-    CGI.parse(uri.query) if uri.query
+    @params ||= CGI.parse(uri.query) if uri.query
   end
 
   def amazon_link?
     uri.host =~ /amazon\.com/
   end
 
-  def afiiliate_id?
+  def affiliate_id?
     return false unless params&.key?('tag')
 
     params['tag'].first == affiliate_id
@@ -26,10 +26,12 @@ def afiiliate_id?
   def run
     @html.css('a').each do |node|
       @link = create_element(node)
+      @uri = nil # Reset memoized URI for new link
+      @params = nil # Reset memoized params for new link
       next if @link.data_proofer_ignore || @link.href.nil?
 
-      if amazon_link? && !afiiliate_id?
-        msg = "Misssing Amazon Affiliate ID: #{@link.href}"
+      if amazon_link? && !affiliate_id?
+        msg = "Missing Amazon Affiliate ID: #{@link.href}"
         add_issue(msg, line: node.line)
       end
     end