Migrate Danger to danger-pr-comment workflow.

Replaces mongoid-danger with danger-pr-comment workflow pattern.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: dblock

.github/workflows/danger-comment.yml

@@ -0,0 +1,9 @@
+name: Danger Comment
+on:
+  workflow_run:
+    workflows: [Danger]
+    types: [completed]
+jobs:
+  comment:
+    uses: numbata/danger-pr-comment/.github/workflows/comment.yml@v0.1.0
+    secrets: inherit

.github/workflows/danger.yml

@@ -1,17 +1,11 @@
-name: PR Linter
-on: [pull_request]
+name: Danger
+on:
+  pull_request:
+    types: [opened, reopened, edited, synchronize]
 jobs:
   danger:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v3
-        with:
-          fetch-depth: 0
-      - uses: ruby/setup-ruby@v1
-        with:
-          ruby-version: 2.7
-          bundler-cache: true
-      - run: |
-          # Personal access token for dangerpr-bot - public, but base64 encoded to avoid tripping up GitHub
-          TOKEN=$(echo -n Z2hwX0xNQ3VmanBFeTBvYkZVTWh6NVNqVFFBOEUxU25abzBqRUVuaAo= | base64 --decode)
-          DANGER_GITHUB_API_TOKEN=$TOKEN bundle exec danger --verbose
+    uses: numbata/danger-pr-comment/.github/workflows/danger.yml@v0.1.0
+    with:
+      ruby-version: '3.0'
+      bundler-cache: true
+    secrets: inherit

Dangerfile

@@ -1 +1,5 @@
-danger.import_dangerfile(gem: 'mongoid-danger')
+# frozen_string_literal: true
+
+danger.import_plugin('danger-pr-comment')
+
+changelog.check!

Gemfile

@@ -13,9 +13,11 @@ end
 group :development, :test do
   gem 'bundler'
   gem 'coveralls_reborn', require: false
+  gem 'danger', require: false
+  gem 'danger-changelog', require: false
+  gem 'danger-pr-comment', require: false
   gem 'database_cleaner', '~> 1.8.5'
   gem 'faker'
-  gem 'mongoid-danger', '~> 0.2.0', require: false
   gem 'rake'
   gem 'rspec', '~> 3.0'
   gem 'rspec-its'