[tools] feat(git-hook): add pre-commit script

.github/hooks/commit-msg

@@ -0,0 +1,23 @@
+#!/bin/bash
+
+# Check commit message
+COMMIT_MSG_FILE=".git/COMMIT_EDITMSG"
+COMMIT_MSG=$(sed -e 's/[[:space:]]*$//' "$COMMIT_MSG_FILE")
+
+# Bash-compatible regex
+REGEX="^\[([a-z]+(/[a-z]+)*)\] (feat|fix|chore|docs|style|refactor|perf|test|build|ci|revert)(\([a-zA-Z0-9_-]+\))?: [a-z].*( \(#([0-9]+)\))?$"
+
+if ! [[ $COMMIT_MSG =~ $REGEX ]]; then
+    echo "ERROR: Commit message must follow format:"
+    echo "[categories] type(scope?): description (#issueNumber optional)"
+    echo "Categories: backend, frontend, tools (can combine with /)"
+    echo "Conventional types: feat, fix, chore, docs, style, refactor, perf, test, build, ci, revert"
+    echo "Description must start with and space and after a lowercase letter"
+    echo "Examples:"
+    echo "[backend] feat(auth): add login endpoint"
+    echo "[frontend/tools] fix(ui): correct button color"
+    echo "[backend/frontend/tools] chore(build): update dependencies (#456)"
+    exit 1
+fi
+
+exit 0

.github/hooks/pre-commit

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+#!/bin/bash
+
+# Apply Spotless
+echo "Running Spotless..."
+# Uncomment and set your Maven path when ready
+# mvn spotless:apply || { echo "Spotless failed! Commit aborted."; exit 1; }