chore: Configure Ruby 4.0.2 and update dependencies

- Add mise.toml for Ruby 4.0.2
- Update gemspec to support Ruby 4.x (>= 4.0.0, < 5.0)
- Update Gemfile.lock for Ruby 4.0.2

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: TonsOfFun

Gemfile.lock

@@ -19,6 +19,7 @@ GEM
     debug (1.11.1)
       irb (~> 1.10)
       reline (>= 0.3.8)
+    drb (2.2.3)
     erb (5.0.2)
     event_stream_parser (1.0.0)
     faraday (2.14.0)
@@ -42,7 +43,9 @@ GEM
     lint_roller (1.1.0)
     logger (1.7.0)
     marcel (1.1.0)
-    minitest (5.25.5)
+    minitest (6.0.5)
+      drb (~> 2.0)
+      prism (~> 1.5)
     multipart-post (2.4.1)
     net-http (0.9.1)
       uri (>= 0.11.1)
@@ -53,7 +56,7 @@ GEM
     pp (0.6.2)
       prettyprint
     prettyprint (0.2.0)
-    prism (1.4.0)
+    prism (1.9.0)
     psych (5.2.6)
       date
       stringio
@@ -101,7 +104,7 @@ GEM
     stringio (3.1.7)
     unicode-display_width (3.1.5)
       unicode-emoji (~> 4.0, >= 4.0.4)
-    unicode-emoji (4.0.4)
+    unicode-emoji (4.2.0)
     uri (1.1.1)
     vcr (6.4.0)
     webmock (3.26.1)

README.md

@@ -301,7 +301,7 @@ Ragents is designed to complement Active Agent - use Ragents for complex multi-a
 
 ## Requirements
 
-- Ruby >= 4.0.0 (required for Ractor improvements including local GC)
+- Ruby 4.0+ (4.1 recommended for latest Ractor improvements)
 - ruby_llm gem (automatically installed)
 
 ## Contributing

mise.toml

@@ -0,0 +1,2 @@
+[tools]
+ruby = "4.0.2"

ragents.gemspec

@@ -16,7 +16,7 @@ Gem::Specification.new do |spec|
   spec.homepage    = "https://activeagents.ai"
   spec.license     = "MIT"
 
-  spec.required_ruby_version = ">= 4.0.0" # Requires Ruby 4.0+ for Ractor improvements
+  spec.required_ruby_version = ">= 4.0.0", "< 5.0" # Ruby 4.x for Ractor improvements
 
   spec.metadata = {
     "bug_tracker_uri" => "https://github.com/activeagents/ragents/issues",