From ea9b2c5e20b507e91846d07343c553d955984ecb Mon Sep 17 00:00:00 2001
From: Koji Takao <koji.takao@speee.jp>
Date: Wed, 21 Jan 2026 22:39:50 +0900
Subject: [PATCH 1/2] Add security scanning and Dependabot configuration

- Add security.yml workflow with Brakeman (SAST) and Bundle Audit
- Add dependabot.yml for automated dependency updates
- Schedule weekly security scans on Mondays
- Group dependency updates by type (development/production)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
---
 .github/dependabot.yml         | 27 ++++++++++++++++++++++
 .github/workflows/security.yml | 42 ++++++++++++++++++++++++++++++++++
 2 files changed, 69 insertions(+)
 create mode 100644 .github/dependabot.yml
 create mode 100644 .github/workflows/security.yml

diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 00000000..ec87ae9d
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,27 @@
+version: 2
+updates:
+  - package-ecosystem: "bundler"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+      day: "monday"
+    open-pull-requests-limit: 10
+    groups:
+      development-dependencies:
+        dependency-type: "development"
+      production-dependencies:
+        dependency-type: "production"
+    commit-message:
+      prefix: "deps"
+    labels:
+      - "dependencies"
+
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+      day: "monday"
+    commit-message:
+      prefix: "ci"
+    labels:
+      - "ci"
diff --git a/.github/workflows/security.yml b/.github/workflows/security.yml
new file mode 100644
index 00000000..2f85d347
--- /dev/null
+++ b/.github/workflows/security.yml
@@ -0,0 +1,42 @@
+name: Security
+
+on:
+  push:
+    branches: [master]
+  pull_request:
+    branches: ['**']
+  schedule:
+    - cron: '0 0 * * 1'  # Every Monday at 00:00 UTC
+
+jobs:
+  brakeman:
+    name: Brakeman (Static Analysis)
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: '3.3'
+      - name: Install Brakeman
+        run: gem install brakeman
+      - name: Run Brakeman
+        run: brakeman --no-pager -w2 --skip-files test/
+
+  bundle-audit:
+    name: Bundle Audit (Dependency Check)
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: '3.3'
+      - name: Install dependencies
+        run: bundle install --jobs 4 --retry 3
+      - name: Install bundle-audit
+        run: gem install bundler-audit
+      - name: Update vulnerability database
+        run: bundle-audit update
+      - name: Run bundle-audit
+        run: bundle-audit check

From 8677ba2dffa016f2a41286d03849982dcc92fd4c Mon Sep 17 00:00:00 2001
From: Koji Takao <koji.takao@speee.jp>
Date: Wed, 21 Jan 2026 22:41:24 +0900
Subject: [PATCH 2/2] Remove Brakeman (not suitable for gem libraries)

Brakeman requires a Rails application structure. This project is a
Ruby gem library, so only Bundle Audit is needed for security scanning.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
---
 .github/workflows/security.yml | 14 --------------
 1 file changed, 14 deletions(-)

diff --git a/.github/workflows/security.yml b/.github/workflows/security.yml
index 2f85d347..4cb8ceeb 100644
--- a/.github/workflows/security.yml
+++ b/.github/workflows/security.yml
@@ -9,20 +9,6 @@ on:
     - cron: '0 0 * * 1'  # Every Monday at 00:00 UTC
 
 jobs:
-  brakeman:
-    name: Brakeman (Static Analysis)
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-      - name: Set up Ruby
-        uses: ruby/setup-ruby@v1
-        with:
-          ruby-version: '3.3'
-      - name: Install Brakeman
-        run: gem install brakeman
-      - name: Run Brakeman
-        run: brakeman --no-pager -w2 --skip-files test/
-
   bundle-audit:
     name: Bundle Audit (Dependency Check)
     runs-on: ubuntu-latest