Raise minimum Ruby to 3.1; CI now covers 3.1-3.5 + head

.github/workflows/ci.yml

@@ -20,10 +20,13 @@ jobs:
   test:
     name: rake (Ruby ${{ matrix.ruby }})
     runs-on: ubuntu-latest
+    # `head` tracks Ruby's main branch (currently 4.0 development) and is
+    # allowed to fail without blocking — it's an early-warning smoke test.
+    continue-on-error: ${{ matrix.ruby == 'head' }}
     strategy:
       fail-fast: false
       matrix:
-        ruby: ["3.0", "3.1", "3.2", "3.3"]
+        ruby: ["3.1", "3.2", "3.3", "3.4", "3.5", "head"]
     steps:
       - uses: actions/checkout@v4
 

.rubocop.yml

@@ -1,7 +1,7 @@
 inherit_from: .rubocop_todo.yml
 
 AllCops:
-  TargetRubyVersion: 3.0
+  TargetRubyVersion: 3.1
   NewCops: enable
   SuggestExtensions: false
   Exclude:

CHANGELOG.md

@@ -4,6 +4,14 @@ All notable changes to the E2B Ruby SDK will be documented in this file.
 
 ## [Unreleased]
 
+### Changed
+
+- **Minimum Ruby version raised to 3.1** (was 3.0). Ruby 3.0 reached end-of-life in March 2024 and is no longer covered by upstream security patches. The CI matrix now spans 3.1, 3.2, 3.3, 3.4, 3.5, plus Ruby `head` (4.0 development branch, allowed to fail) as an early-warning smoke test.
+
+### Internal
+
+- Adopted Ruby 3.1 anonymous block forwarding (`&` instead of `&block`) in `Services::CommandHandle` after the `TargetRubyVersion` bump unlocked the relevant cops.
+
 ## [0.3.5] - 2026-05-10
 
 ### Fixed

e2b.gemspec

@@ -16,7 +16,7 @@ Gem::Specification.new do |spec|
   DESC
   spec.homepage = "https://github.com/ya-luotao/e2b-ruby"
   spec.license = "MIT"
-  spec.required_ruby_version = ">= 3.0.0"
+  spec.required_ruby_version = ">= 3.1.0"
 
   spec.metadata["homepage_uri"] = spec.homepage
   spec.metadata["source_code_uri"] = "https://github.com/ya-luotao/e2b-ruby"

lib/e2b/services/command_handle.rb

@@ -243,15 +243,15 @@ def disconnect
       # @yieldparam stderr [String, nil] Stderr data, or nil
       # @yieldparam pty [String, nil] PTY data, or nil
       # @return [void]
-      def each(&block)
+      def each(&)
         return enum_for(:each) unless block_given?
 
         if @result
           # Iterate over pre-materialized events
-          iterate_materialized_events(&block)
+          iterate_materialized_events(&)
         elsif @events_proc
           # Iterate over streaming events
-          iterate_streaming_events(&block)
+          iterate_streaming_events(&)
         end
       end
 
@@ -298,15 +298,15 @@ def build_result
       #
       # @yield [stdout, stderr, pty]
       # @return [void]
-      def iterate_materialized_events(&block)
+      def iterate_materialized_events(&)
         events = result_value(:events) || []
         while @materialized_event_index < events.length
           break if @disconnected
 
           event_hash = events[@materialized_event_index]
           @materialized_event_index += 1
 
-          process_message(event_hash, &block)
+          process_message(event_hash, &)
         end
       end
 
@@ -341,11 +341,11 @@ def iterate_streaming_events(&block)
       # @param message [Hash] A raw stream message
       # @yield [stdout, stderr, pty]
       # @return [void]
-      def process_message(message, &block)
+      def process_message(message, &)
         return unless message.is_a?(Hash)
 
         event = message["event"]
-        process_event(event, &block) if event.is_a?(Hash)
+        process_event(event, &) if event.is_a?(Hash)
 
         if event.nil?
           stdout_chunk = EnvdBase64.decode_process_output(message["stdout"])