feat: introduce Solid Objects

Author: cardmagic

.github/workflows/ci.yml

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+name: CI
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  sqlite:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: "3.3"
+          bundler-cache: true
+      - run: bundle exec rake
+
+  postgresql:
+    runs-on: ubuntu-latest
+    services:
+      postgres:
+        image: postgres:18
+        env:
+          POSTGRES_USER: solid_objects
+          POSTGRES_PASSWORD: solid_objects
+          POSTGRES_DB: solid_objects_test
+        ports:
+          - 5432:5432
+        options: >-
+          --health-cmd "pg_isready -U solid_objects"
+          --health-interval 5s
+          --health-timeout 5s
+          --health-retries 10
+    env:
+      SOLID_OBJECTS_DATABASE_URL: postgresql://solid_objects:solid_objects@127.0.0.1:5432/solid_objects_test
+    steps:
+      - uses: actions/checkout@v4
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: "3.3"
+          bundler-cache: true
+      - run: bundle exec rake test
+
+  mysql:
+    runs-on: ubuntu-latest
+    services:
+      mysql:
+        image: mysql:8.4
+        env:
+          MYSQL_USER: solid_objects
+          MYSQL_PASSWORD: solid_objects
+          MYSQL_DATABASE: solid_objects_test
+          MYSQL_ROOT_PASSWORD: root
+        ports:
+          - 3306:3306
+        options: >-
+          --health-cmd "mysqladmin ping -h 127.0.0.1 -uroot -proot"
+          --health-interval 5s
+          --health-timeout 5s
+          --health-retries 20
+    env:
+      SOLID_OBJECTS_DATABASE_URL: mysql2://solid_objects:solid_objects@127.0.0.1:3306/solid_objects_test
+    steps:
+      - uses: actions/checkout@v4
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: "3.3"
+          bundler-cache: true
+      - run: bundle exec rake test
+
+  static:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: "3.3"
+          bundler-cache: true
+      - run: bundle exec rake standard rubocop rbs steep security

.gitignore

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+/.bundle
+/.ruby-lsp
+/coverage
+/pkg
+/test/dummy/log
+/test/dummy/storage
+/test/dummy/tmp
+/tmp
+/.claude
+/.codex

.rubocop.yml

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+# Want to disable a check for a specific case? To disable checks inline:
+# http://docs.rubocop.org/en/latest/configuration/#disabling-cops-within-source-code
+
+inherit_gem: { rubocop-rails-omakase: rubocop.yml }
+
+AllCops:
+  TargetRubyVersion: 3.3
+  Exclude:
+    - "**/*_schema.rb"
+    - "lib/generators/solid_queue/update/templates/db/*"

.standard.yml

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+ruby_version: 3.3
+ignore:
+  - "**/*":
+      - Layout/SpaceInsideArrayLiteralBrackets
+      - Layout/SpaceInsideHashLiteralBraces

CHANGELOG.md

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+# Changelog
+
+## 0.1.0 - 2026-08-06
+
+- Introduce the Rails engine, actor API, and `solid_objects` executable.
+- Add ordered durable mailboxes with ready and claimed membership tables.
+- Add renewable activation leases with monotonically increasing fencing
+  generations.
+- Add JSON actor state, versioned migrations, retries, and dead letters.
+- Add transactional effects, actor-to-actor messages, and durable reminders.
+- Add observable Turbo replacements through a durable broadcast outbox.
+- Support SQLite, PostgreSQL, and MySQL.

Gemfile

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+source "https://rubygems.org"
+
+gemspec
+
+group :development, :test do
+  gem "mysql2", ">= 0.5", require: false
+  gem "pg", ">= 1.5", require: false
+  gem "sqlite3", ">= 2.1", require: false
+end
+
+group :development do
+  gem "brakeman", require: false
+  gem "rbs-inline", require: false
+  gem "standard", require: false
+  gem "steep", require: false
+end