feat: add complete Ruby Server SDK

.github/workflows/ci.yml

@@ -0,0 +1,24 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        ruby: ["3.1", "3.4"]
+    steps:
+      - uses: actions/checkout@v5
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ matrix.ruby }}
+      - run: bundle install --jobs 4 --retry 3
+      - run: bundle exec rspec
+      - run: bundle exec rubocop
+      - run: bundle exec ruby scripts/resource_audit.rb
+      - run: gem build featbit-server-sdk.gemspec

.gitignore

@@ -0,0 +1,10 @@
+/.bundle/
+/coverage/
+/pkg/
+/vendor/bundle/
+/*.gem
+/Gemfile.lock
+/examples/*/.bundle/
+/examples/*/Gemfile.lock
+/examples/Rails/log/
+/examples/Rails/tmp/

.rubocop.yml

@@ -0,0 +1,50 @@
+AllCops:
+  TargetRubyVersion: 3.1
+  NewCops: enable
+  SuggestExtensions: false
+  Exclude:
+    - "vendor/**/*"
+
+Layout/EndOfLine:
+  Enabled: false
+
+Layout/LineLength:
+  Max: 140
+
+Style/StringLiterals:
+  EnforcedStyle: double_quotes
+
+Style/Documentation:
+  Enabled: false
+
+Metrics/AbcSize:
+  Max: 100
+
+Metrics/ClassLength:
+  Max: 250
+
+Metrics/BlockLength:
+  Exclude:
+    - "spec/**/*"
+
+Metrics/CyclomaticComplexity:
+  Max: 50
+
+Metrics/MethodLength:
+  Max: 35
+
+Metrics/PerceivedComplexity:
+  Max: 50
+
+Metrics/ParameterLists:
+  Max: 20
+
+Style/OptionalBooleanParameter:
+  Enabled: false
+
+Naming/PredicateMethod:
+  AllowedMethods:
+    - close
+    - enqueue
+    - flush
+    - post_batch

CHANGELOG.md

@@ -0,0 +1,11 @@
+# Changelog
+
+## 0.1.0
+
+- Initial FeatBit Ruby Server SDK.
+- Local typed evaluation with variation IDs and evaluation reasons.
+- WebSocket data synchronization, event batching, status listeners, offline bootstrap, and safe public APIs.
+- Console and Rails examples aligned with the .NET Server SDK documentation.
+- Hardened event shutdown, reconnect cleanup, cyclic segment evaluation, immutable users, and per-entity patch versions.
+- Fixed live WebSocket token encoding and callback context handling.
+- Matched FeatBit's event wire types and enforced configured batch limits during explicit flush.

Gemfile

@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+
+source "https://rubygems.org"
+
+gemspec
+
+gem "rake", "~> 13.2"
+gem "rspec", "~> 3.13"
+gem "rubocop", "~> 1.75", require: false

Gemfile.lock

@@ -0,0 +1,77 @@
+PATH
+  remote: .
+  specs:
+    featbit-server-sdk (0.1.0)
+      logger (~> 1.6)
+      websocket-client-simple (~> 0.9)
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    ast (2.4.3)
+    base64 (0.3.0)
+    diff-lcs (1.6.2)
+    event_emitter (0.2.6)
+    json (2.21.1)
+    language_server-protocol (3.17.0.6)
+    lint_roller (1.1.0)
+    logger (1.6.4)
+    mutex_m (0.3.0)
+    parallel (2.1.0)
+    parser (3.3.12.0)
+      ast (~> 2.4.1)
+      racc
+    prism (1.9.0)
+    racc (1.8.1)
+    rainbow (3.1.1)
+    rake (13.4.2)
+    regexp_parser (2.12.0)
+    rspec (3.13.2)
+      rspec-core (~> 3.13.0)
+      rspec-expectations (~> 3.13.0)
+      rspec-mocks (~> 3.13.0)
+    rspec-core (3.13.6)
+      rspec-support (~> 3.13.0)
+    rspec-expectations (3.13.5)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.13.0)
+    rspec-mocks (3.13.8)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.13.0)
+    rspec-support (3.13.7)
+    rubocop (1.88.2)
+      json (~> 2.3)
+      language_server-protocol (~> 3.17.0.2)
+      lint_roller (~> 1.1.0)
+      parallel (>= 1.10)
+      parser (>= 3.3.0.2)
+      rainbow (>= 2.2.2, < 4.0)
+      regexp_parser (>= 2.9.3, < 3.0)
+      rubocop-ast (>= 1.49.0, < 2.0)
+      ruby-progressbar (~> 1.7)
+      unicode-display_width (>= 2.4.0, < 4.0)
+    rubocop-ast (1.50.0)
+      parser (>= 3.3.7.2)
+      prism (~> 1.7)
+    ruby-progressbar (1.13.0)
+    unicode-display_width (3.2.0)
+      unicode-emoji (~> 4.1)
+    unicode-emoji (4.2.0)
+    websocket (1.2.11)
+    websocket-client-simple (0.9.0)
+      base64
+      event_emitter
+      mutex_m
+      websocket
+
+PLATFORMS
+  x64-mingw-ucrt
+
+DEPENDENCIES
+  featbit-server-sdk!
+  rake (~> 13.2)
+  rspec (~> 3.13)
+  rubocop (~> 1.75)
+
+BUNDLED WITH
+   2.6.9