From ec51b2093065c76cf3465f26efd10e58edc07f91 Mon Sep 17 00:00:00 2001
From: Dustin Byrne <dustin@posthog.com>
Date: Wed, 7 Oct 2026 16:19:06 -0400
Subject: [PATCH] ci: test latest Rails on stable Ruby

---
 .github/workflows/unit-tests.yml | 23 +++++++++++++++++++++++
 CONTRIBUTING.md                  |  2 ++
 Gemfile                          |  6 ++++--
 3 files changed, 29 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/unit-tests.yml b/.github/workflows/unit-tests.yml
index f4f2a32..9867d99 100644
--- a/.github/workflows/unit-tests.yml
+++ b/.github/workflows/unit-tests.yml
@@ -39,6 +39,29 @@ jobs:
       - name: Run RSpec tests
         run: bundle exec rspec
 
+  latest-rails:
+    name: RSpec (latest Rails / stable Ruby)
+    runs-on: ubuntu-latest
+    env:
+      BUNDLE_GEMFILE: gemfiles/otel.gemfile
+      RAILS_VERSION: '>= 5.2'
+      RAILS_ENV: test
+      GH_ACTIONS_UNIT_TESTS: 1
+    steps:
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+      - name: Use stable Ruby
+        uses: ruby/setup-ruby@14594264cd68ce8a2345dd349bc3d138a4ef85c8 # v1.327.0
+        with:
+          ruby-version: ruby
+          bundler: 4.0.13
+      - name: Resolve latest Rails and dependencies
+        run: bundle update --all
+      - name: Report resolved versions and require logs dependencies
+        run: |
+          bundle exec ruby -rrails -rjson -ropentelemetry-sdk -ropentelemetry-logs-sdk -ropentelemetry/exporter/otlp_logs -e 'puts "Ruby #{RUBY_VERSION}, Rails #{Rails.version}, JSON #{JSON::VERSION}"'
+      - name: Run RSpec tests
+        run: bundle exec rspec
+
   logs-integration:
     name: Logs integration (Ruby ${{ matrix.ruby-version }})
     runs-on: ubuntu-latest
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 527eb61..1d7956c 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -49,6 +49,8 @@ BUNDLE_GEMFILE=gemfiles/otel.gemfile bundle exec rspec
 
 Without that bundle, those two integration tests are reported as pending. CI runs both bundles.
 
+CI also runs the full suite with real OpenTelemetry dependencies on stable Ruby and the latest stable Rails eligible under the repository's 7-day RubyGems cooldown. This job sets `RAILS_VERSION='>= 5.2'` and runs `bundle update --all` so the committed lockfile does not keep Rails on an older version. The existing Ruby matrix continues to use the committed lockfiles.
+
 The public API snapshot covers both `posthog-ruby` and `posthog-rails`. If you intentionally change either API, update the snapshot and review the diff:
 
 ```bash
diff --git a/Gemfile b/Gemfile
index 03d8ba4..30ec8d4 100644
--- a/Gemfile
+++ b/Gemfile
@@ -11,13 +11,15 @@ gemspec
 gem 'concurrent-ruby', require: 'concurrent'
 gem 'irb'
 
+rails_version = ENV.fetch('RAILS_VERSION', '~> 7.1')
+
 group :development, :test do
-  gem 'activesupport', '~> 7.1'
+  gem 'activesupport', rails_version
   gem 'commander', '~> 5.0'
   gem 'mcp', '>= 1.4'
   gem 'oj', '~> 3.17.7'
   gem 'prettier'
-  gem 'railties', '~> 7.1'
+  gem 'railties', rails_version
   gem 'rake', '~> 13.4.2'
   gem 'rspec', '~> 3.13'
   gem 'rubocop', '~> 1.91.0'