From d314a3d5a674eb4583f600a4ad5fbd58e7e6d503 Mon Sep 17 00:00:00 2001
From: pratyush07-hub <choudharypratyush809@gmail.com>
Date: Thu, 9 Apr 2026 18:19:35 +0530
Subject: [PATCH 1/5] Support launching with rackup on Rack 3

---
 lib/rack/handler/rage.rb   |  1 +
 lib/rackup/handler/rage.rb |  1 +
 lib/rage-rb.rb             |  7 +++++++
 lib/rage/handler.rb        | 11 +++++++++++
 4 files changed, 20 insertions(+)
 create mode 100644 lib/rack/handler/rage.rb
 create mode 100644 lib/rackup/handler/rage.rb
 create mode 100644 lib/rage/handler.rb

diff --git a/lib/rack/handler/rage.rb b/lib/rack/handler/rage.rb
new file mode 100644
index 00000000..dfcba731
--- /dev/null
+++ b/lib/rack/handler/rage.rb
@@ -0,0 +1 @@
+require "rage"
\ No newline at end of file
diff --git a/lib/rackup/handler/rage.rb b/lib/rackup/handler/rage.rb
new file mode 100644
index 00000000..dfcba731
--- /dev/null
+++ b/lib/rackup/handler/rage.rb
@@ -0,0 +1 @@
+require "rage"
\ No newline at end of file
diff --git a/lib/rage-rb.rb b/lib/rage-rb.rb
index 2f8d1537..8dcb674f 100644
--- a/lib/rage-rb.rb
+++ b/lib/rage-rb.rb
@@ -200,3 +200,10 @@ module RageController
 
 require_relative "rage/env"
 require_relative "rage/internal"
+require_relative "rage/handler"
+
+begin
+  ::Rack::Handler.register("rage", "Rage::Handler") if defined?(::Rack::Handler)
+  ::Rackup::Handler.register("rage", "Rage::Handler") if defined?(::Rackup::Handler)
+rescue StandardError
+end
diff --git a/lib/rage/handler.rb b/lib/rage/handler.rb
new file mode 100644
index 00000000..fd84d7b5
--- /dev/null
+++ b/lib/rage/handler.rb
@@ -0,0 +1,11 @@
+module Rage
+  module Handler
+    def self.run(app, options = {})
+      Rage::CLI.new([], {
+        port: options[:Port],
+        binding: options[:Host],
+        environment: options[:environment]
+      }).server
+    end
+  end
+end

From 4f3433247d3ab7279c659c38dbf66d57171542bb Mon Sep 17 00:00:00 2001
From: pratyush07-hub <choudharypratyush809@gmail.com>
Date: Thu, 9 Apr 2026 18:37:44 +0530
Subject: [PATCH 2/5] Add changelog entry and fix code style issues

---
 CHANGELOG.md               | 2 ++
 lib/rack/handler/rage.rb   | 2 +-
 lib/rackup/handler/rage.rb | 2 +-
 lib/rage-rb.rb             | 2 +-
 4 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 90c2b863..84ca1188 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,6 @@
 ## [Unreleased]
+### Added
+- Support launching with `rackup` on Rack 3 by [@pratyush07-hub](https://github.com/pratyush07-hub) (#259).
 
 ## [1.22.1] - 2026-04-01
 
diff --git a/lib/rack/handler/rage.rb b/lib/rack/handler/rage.rb
index dfcba731..c34973a2 100644
--- a/lib/rack/handler/rage.rb
+++ b/lib/rack/handler/rage.rb
@@ -1 +1 @@
-require "rage"
\ No newline at end of file
+require "rage"
diff --git a/lib/rackup/handler/rage.rb b/lib/rackup/handler/rage.rb
index dfcba731..c34973a2 100644
--- a/lib/rackup/handler/rage.rb
+++ b/lib/rackup/handler/rage.rb
@@ -1 +1 @@
-require "rage"
\ No newline at end of file
+require "rage"
diff --git a/lib/rage-rb.rb b/lib/rage-rb.rb
index 8dcb674f..dddf731c 100644
--- a/lib/rage-rb.rb
+++ b/lib/rage-rb.rb
@@ -205,5 +205,5 @@ module RageController
 begin
   ::Rack::Handler.register("rage", "Rage::Handler") if defined?(::Rack::Handler)
   ::Rackup::Handler.register("rage", "Rage::Handler") if defined?(::Rackup::Handler)
-rescue StandardError
+rescue
 end

From 7fdc24ce3e53b98b2dbf18cddbb8debe6625f371 Mon Sep 17 00:00:00 2001
From: pratyush07-hub <choudharypratyush809@gmail.com>
Date: Thu, 9 Apr 2026 20:35:48 +0530
Subject: [PATCH 3/5] Implement production-grade Rack 3 support with
 environment mapping and middleware integration

---
 lib/rage-rb.rb      |  6 +++++-
 lib/rage/cli.rb     |  6 +++---
 lib/rage/handler.rb | 14 +++++++++-----
 3 files changed, 17 insertions(+), 9 deletions(-)

diff --git a/lib/rage-rb.rb b/lib/rage-rb.rb
index dddf731c..a1edac2a 100644
--- a/lib/rage-rb.rb
+++ b/lib/rage-rb.rb
@@ -7,8 +7,12 @@
 
 module Rage
   # Builds the Rage application with the configured middlewares.
+  def self.application=(app)
+    @application = app
+  end
+
   def self.application
-    with_middlewares(Application.new(__router), config.middleware.middlewares)
+    @application ||= with_middlewares(Application.new(__router), config.middleware.middlewares)
   end
 
   # Builds the Rage application which delegates Rails requests to `Rails.application`.
diff --git a/lib/rage/cli.rb b/lib/rage/cli.rb
index 40b73ebe..b1d3bda8 100644
--- a/lib/rage/cli.rb
+++ b/lib/rage/cli.rb
@@ -83,12 +83,12 @@ def new(path = nil)
     option :binding, aliases: "-b", desc: "Binds Rails to the specified IP - defaults to 'localhost' in development and '0.0.0.0' in other environments"
     option :config, aliases: "-c", desc: "Uses a custom rack configuration"
     option :help, aliases: "-h", desc: "Show this message"
-    def server
+    def server(app: nil)
       return help("server") if options.help?
 
       set_env(options)
-
-      app = ::Rack::Builder.parse_file(options[:config] || "config.ru")
+      Rage.configure { config.log_level = :error } if options[:quiet]
+      app ||= ::Rack::Builder.parse_file(options[:config] || "config.ru")
       app = app[0] if app.is_a?(Array)
 
       server_options = { service: :http, handler: app }
diff --git a/lib/rage/handler.rb b/lib/rage/handler.rb
index fd84d7b5..c336c40a 100644
--- a/lib/rage/handler.rb
+++ b/lib/rage/handler.rb
@@ -1,11 +1,15 @@
 module Rage
   module Handler
     def self.run(app, options = {})
-      Rage::CLI.new([], {
-        port: options[:Port],
-        binding: options[:Host],
-        environment: options[:environment]
-      }).server
+      Rage.application = app
+      
+      cli_options = {}
+      cli_options[:port] = options[:Port] if options[:Port]
+      cli_options[:binding] = options[:Host] if options[:Host]
+      cli_options[:environment] = options[:environment] if options[:environment]
+      cli_options[:quiet] = options[:quiet] if options[:quiet]
+
+      Rage::CLI.new([], cli_options).server(app: app)
     end
   end
 end

From 3ff9b4b75e1976e41513233f95727ac6ca07acac Mon Sep 17 00:00:00 2001
From: pratyush07-hub <choudharypratyush809@gmail.com>
Date: Thu, 9 Apr 2026 20:40:24 +0530
Subject: [PATCH 4/5] Fix code style in Rage::Handler

---
 lib/rage/handler.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/rage/handler.rb b/lib/rage/handler.rb
index c336c40a..1e98dd74 100644
--- a/lib/rage/handler.rb
+++ b/lib/rage/handler.rb
@@ -2,7 +2,7 @@ module Rage
   module Handler
     def self.run(app, options = {})
       Rage.application = app
-      
+
       cli_options = {}
       cli_options[:port] = options[:Port] if options[:Port]
       cli_options[:binding] = options[:Host] if options[:Host]

From 18a36fc6b24a5891b990a719505b37de176020e4 Mon Sep 17 00:00:00 2001
From: pratyush07-hub <choudharypratyush809@gmail.com>
Date: Tue, 14 Apr 2026 19:28:04 +0530
Subject: [PATCH 5/5] Fix NoMethodError: name for nil in Rage::Handler
 discovery

---
 lib/rack/handler/rage.rb   | 1 +
 lib/rackup/handler/rage.rb | 1 +
 lib/rage/handler.rb        | 4 ++++
 3 files changed, 6 insertions(+)

diff --git a/lib/rack/handler/rage.rb b/lib/rack/handler/rage.rb
index c34973a2..37c74ba7 100644
--- a/lib/rack/handler/rage.rb
+++ b/lib/rack/handler/rage.rb
@@ -1 +1,2 @@
 require "rage"
+Rack::Handler.register("rage", "Rage::Handler") if defined?(Rack::Handler)
diff --git a/lib/rackup/handler/rage.rb b/lib/rackup/handler/rage.rb
index c34973a2..9a73cf5d 100644
--- a/lib/rackup/handler/rage.rb
+++ b/lib/rackup/handler/rage.rb
@@ -1 +1,2 @@
 require "rage"
+Rackup::Handler.register("rage", "Rage::Handler") if defined?(Rackup::Handler)
diff --git a/lib/rage/handler.rb b/lib/rage/handler.rb
index 1e98dd74..60207fe4 100644
--- a/lib/rage/handler.rb
+++ b/lib/rage/handler.rb
@@ -1,5 +1,9 @@
 module Rage
   module Handler
+    def self.name
+      "Rage"
+    end
+
     def self.run(app, options = {})
       Rage.application = app