Maintenance release v0.2.0 — modernize project tooling

- Replace .ruby/var metadata with standard gemspec
- Replace Travis CI with GitHub Actions (Ruby 3.1–3.4)
- Switch tests from citron/ae to minitest
- Add Rakefile, LICENSE.txt
- Rewrite README to elaborate the design argument
- Require Ruby >= 3.1

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: trans

.gemspec

@@ -0,0 +1,21 @@
+name: Test
+
+on:
+  push:
+    branches: [master]
+  pull_request:
+    branches: [master]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        ruby: ['3.1', '3.2', '3.3', '3.4']
+    steps:
+      - uses: actions/checkout@v4
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ matrix.ruby }}
+          bundler-cache: true
+      - run: bundle exec rake test

.github/workflows/test.yml

@@ -1,8 +1,7 @@
-.reap/digest
 .yardoc
 doc
 log
 pkg
 tmp
-web
-work/sandbox
+Gemfile.lock
+*.gem

.gitignore

@@ -1,2 +1,3 @@
-source :rubygems
+source 'https://rubygems.org'
+
 gemspec

.ruby

@@ -1,10 +1,23 @@
 # RELEASE HISTORY
 
+## 0.2.0 / 2026-04-07
+
+Maintenance release modernizing the project.
+
+Changes:
+
+* Replace .ruby/var metadata system with standard gemspec.
+* Replace Travis CI with GitHub Actions (Ruby 3.1–3.4).
+* Switch tests from citron/ae to minitest.
+* Add Rakefile.
+* Rewrite README to elaborate on the design argument.
+* Require Ruby >= 3.1.
+
+
 ## 0.1.0 / 2011-12-23
 
 Initial and quite hopefully the only release ever needed.
 
 Changes:
 
 * Spun project off from Ruby Facets.
-

.test

@@ -0,0 +1,23 @@
+Copyright (c) 2006 Rubyworks
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice,
+   this list of conditions and the following disclaimer.
+
+2. Redistributions in binary form must reproduce the above copyright notice,
+   this list of conditions and the following disclaimer in the documentation
+   and/or other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGE.