Add pre-commit hook to run standard

Gemfile

@@ -12,5 +12,5 @@ gem "bake", "~> 0.20"
 group :development, :test do
   gem "guard", "~> 2.18"
   gem "minitest", "~> 6.0"
-  gem "standard", "~> 1.43"
+  gem "standard", "~> 1.52"
 end

Gemfile.lock

@@ -174,7 +174,7 @@ DEPENDENCIES
   minitest (~> 6.0)
   phlex (~> 2.3)
   rouge (~> 4.6)
-  standard (~> 1.43)
+  standard (~> 1.52)
 
 RUBY VERSION
   ruby 4.0.2

bin/bootstrap

@@ -34,4 +34,8 @@ else
   bundle install
 fi
 
+echo "*** installing git hooks"
+mkdir -p .git/hooks
+ln -sf "../../bin/hooks/pre-commit" .git/hooks/pre-commit
+
 echo "*** done"

bin/hooks/pre-commit

@@ -0,0 +1,49 @@
+#!/bin/zsh
+
+set -euo pipefail
+
+STAGED_FILES=(${(f)"$(git diff --cached --name-only --diff-filter=ACM)"})
+
+if [[ ${#STAGED_FILES[@]} -eq 0 ]]; then
+    exit 0
+fi
+
+RUBY_FILES=()
+for file in "${STAGED_FILES[@]}"; do
+    if [[ -f "$file" ]]; then
+        if [[ "$file" =~ \.rb$ ]] || head -1 "$file" 2>/dev/null | grep -q ruby; then
+            RUBY_FILES+=("$file")
+        fi
+    fi
+done
+
+if [[ ${#RUBY_FILES[@]} -eq 0 ]]; then
+    exit 0
+fi
+
+echo "Running StandardRB on staged Ruby files..."
+if command -v rbenv &>/dev/null; then
+    rbenv exec bundle exec standardrb --fix "${RUBY_FILES[@]}"
+else
+    bundle exec standardrb --fix "${RUBY_FILES[@]}"
+fi
+
+MODIFIED=false
+for file in "${RUBY_FILES[@]}"; do
+    if ! git diff --quiet "$file"; then
+        MODIFIED=true
+        echo "✗ $file was modified by StandardRB"
+    fi
+done
+
+if [[ "$MODIFIED" == "true" ]]; then
+    echo ""
+    echo "❌ Formatting changes were made. Please review and stage the changes, then commit again."
+    echo ""
+    echo "To see the changes: git diff"
+    echo "To add the changes: git add -u"
+    exit 1
+fi
+
+echo "✅ All files are properly formatted"
+exit 0