feat: Conventional-Commits-Validierung im PreToolUse-Hook

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

hooks/pre-bash-checks.sh

@@ -3,13 +3,47 @@ set -euo pipefail
 
 cmd=$(jq -r '.tool_input.command // ""')
 
-# Git-Branch-Schutz: kein direkter Commit auf main
+VALID_TYPES="feat|fix|docs|refactor|test|chore|perf|ci|build|style"
+
+extract_subject() {
+  local cmd="$1"
+  if echo "$cmd" | grep -qE "cat\s+<<"; then
+    echo "$cmd" | sed -n "/cat <</{n; :loop; /^[[:space:]]*EOF/q; /^[[:space:]]*$/!{s/^[[:space:]]*//; p; q;}; n; b loop;}"
+  elif echo "$cmd" | grep -qP -- '-[a-z]*m\s+"'; then
+    echo "$cmd" | grep -oP -- '-[a-z]*m\s+"\K[^"]*' | head -1
+  elif echo "$cmd" | grep -qP -- "-[a-z]*m\s+'"; then
+    echo "$cmd" | grep -oP -- "-[a-z]*m\s+'\\K[^']*" | head -1
+  fi
+}
+
+# Git-Commit-Pruefungen
 if echo "$cmd" | grep -qE '^\s*git\s+commit\b'; then
+  # Branch-Schutz: kein direkter Commit auf main
   branch=$(git rev-parse --abbrev-ref HEAD 2>/dev/null || echo "")
   if [ "$branch" = "main" ]; then
     printf '{"continue":false,"stopReason":"BLOCKIERT: Direkter Commit auf main verboten (globale Regel). Bitte zuerst Feature-Branch erstellen: git checkout -b session/YYYY-MM-DD-titel"}\n'
     exit 0
   fi
+
+  # Commit-Message: Conventional Commits Format pruefen
+  subject=$(extract_subject "$cmd")
+
+  if [ -n "$subject" ]; then
+    if ! echo "$subject" | grep -qP "^(${VALID_TYPES})(\\(.+\\))?\\!?:\\s.+"; then
+      printf '{"continue":false,"stopReason":"BLOCKIERT: Commit-Message folgt nicht dem Conventional-Commits-Format. Erwartet: <type>: <Beschreibung>. Erlaubte Typen: feat, fix, docs, refactor, test, chore, perf, ci, build, style"}\n'
+      exit 0
+    fi
+
+    if [ ${#subject} -gt 72 ]; then
+      printf '{"continue":false,"stopReason":"BLOCKIERT: Commit-Message Subject zu lang (%d Zeichen, max 72)."}\n' "${#subject}"
+      exit 0
+    fi
+
+    if echo "$subject" | grep -qP '\.\s*$'; then
+      printf '{"continue":false,"stopReason":"BLOCKIERT: Commit-Message Subject darf nicht mit einem Punkt enden."}\n'
+      exit 0
+    fi
+  fi
 fi
 
 # apt -y verboten