feat: git hooks for commit signature validation for studio

.husky/commit-msg

@@ -0,0 +1,25 @@
+#!/bin/bash
+
+# . "$(dirname -- "$0")/_/husky.sh"
+
+# ANSI colors
+RED="\033[0;31m"
+YELLOW="\033[0;33m"
+CYAN="\033[0;36m"
+GREEN="\033[0;32m"
+RESET="\033[0m"
+
+commit_msg_file=$1
+
+# Guard: ensure commit message file exists
+if [ -z "$commit_msg_file" ] || [ ! -f "$commit_msg_file" ]; then
+  echo "⚠️  No commit message file provided or file does not exist."
+  echo "👉 Skipping DCO sign-off check."
+  exit 0
+fi
+
+if ! grep -q "Signed-off-by:" "$commit_msg_file"; then
+  echo "${RED} Commit message missing Signed-off-by line ${RESET}"
+  echo "${GREEN} Use: git commit -s ... ${RESET}"
+  exit 1
+fi

.husky/post-commit

@@ -0,0 +1,43 @@
+#!/bin/bash
+
+RESET="\033[0m"
+RED="\033[0;31m"
+GREEN="\033[0;32m"
+YELLOW="\033[0;33m"
+BLUE="\033[0;34m"
+CYAN="\033[0;36m"
+
+# . "$(dirname -- "$0")/_/husky.sh"
+
+echo "${BLUE}Checking last commit signature...${RESET}"
+
+last_commit=$(git rev-parse HEAD)
+
+# Count parents to detect merge commits
+parent_count=$(git rev-list --parents -n 1 $last_commit | awk '{print NF-1}')
+
+if [ "$parent_count" -gt 1 ]; then
+  echo "${BLUE}Skipping merge commit $last_commit${RESET}"
+  exit 0
+fi
+
+sig_status=$(git log --format='%G?' -n 1 $last_commit)
+
+if [ "$sig_status" != "G" ]; then
+  echo "${RED}❌ Commit $last_commit is not verified!${RESET}"
+  echo
+  echo "${YELLOW}👉 How to fix:${RESET}"
+  echo "   1. Re-sign your last commit with both sign-off (-s) and signature (-S):"
+  echo "      git commit --amend -sS --no-edit"
+  echo
+  echo "   2. If you haven't set up commit signing yet:"
+  echo "      - GPG/SSH signing setup: https://docs.github.com/en/authentication/managing-commit-signature-verification/signing-commits"
+  echo
+  echo "${CYAN}💡 Tip: You can enable automatic signing for all commits with:${RESET}"
+  echo "   git config --global commit.gpgsign true"
+  echo
+  exit 1
+  # In post-commit we usually *warn* not block, but you can `exit 1` if you want strict enforcement
+else
+  echo "${GREEN}Commit $last_commit is signed and verified.${RESET}"
+fi

.husky/pre-commit

@@ -1,4 +1,5 @@
-#!/bin/sh
-cd "$(dirname "$0")/.."  # Move to project root (outer folder)
-# cd nextjs                # Move into Next.js folder
-npx lint-staged
+#!/usr/bin/env sh
+
+. "$(dirname -- "$0")/_/husky.sh"
+
+npx lint-staged

.husky/pre-push

@@ -0,0 +1,144 @@
+#!/bin/bash
+
+# . "$(dirname -- "$0")/_/husky.sh"
+
+# ANSI colors
+RED="\033[0;31m"
+YELLOW="\033[0;33m"
+CYAN="\033[0;36m"
+GREEN="\033[0;32m"
+RESET="\033[0m"
+
+echo "🔒 Checking commit signatures..."
+
+# Read stdin into a temp file
+TMP_FILE=$(mktemp)
+cat > "$TMP_FILE"
+
+if [ ! -s "$TMP_FILE" ]; then
+  echo "No refs to push - skipping commit signature validation."
+fi
+
+while read local_ref local_sha remote_ref remote_sha; do
+  # Determine range of commits
+  if [ "$remote_sha" = "0000000000000000000000000000000000000000" ]; then
+      # Use the branch being pushed (may differ from HEAD)
+      if echo "$local_ref" | grep -q '^refs/heads/'; then
+        target_branch=${local_ref#refs/heads/}
+      else
+        target_branch=$(git rev-parse --abbrev-ref HEAD)
+      fi
+
+      # Find closest local base branch by commit distance (exclude the target itself)
+      base_branch=$(
+        git for-each-ref --format='%(refname:short)' refs/heads/ \
+          | grep -vxF "$target_branch" \
+          | while IFS= read -r other_branch; do
+              merge_base=$(git merge-base "$target_branch" "$other_branch") || continue
+              [ -n "$merge_base" ] || continue
+              echo "$(git rev-list --count "${merge_base}..${target_branch}") $other_branch"
+            done \
+          | sort -n \
+          | head -n1 \
+          | awk '{print $2}'
+      )
+
+      if [ -z "$base_branch" ]; then
+        # Resolve remote default (origin/HEAD) or use $default_branch/main
+        base_branch=${default_branch:-$(git symbolic-ref --quiet --short refs/remotes/origin/HEAD 2>/dev/null | sed 's@^origin/@@')}
+        [ -n "$base_branch" ] || base_branch=main
+        echo "⚠️  Base branch not found — defaulting to '${base_branch}'"
+      fi
+
+      # Prefer local base, else remote tracking
+      if git show-ref --verify --quiet "refs/heads/$base_branch"; then
+        base_ref="$base_branch"
+      else
+        base_ref="origin/$base_branch"
+      fi
+
+      base_commit=$(git merge-base "$base_ref" "$target_branch" 2>/dev/null || true)
+      if [ -n "$base_commit" ]; then
+        range="$base_commit..$local_sha"
+      else
+        # Safe minimal fallback: just the tip commit
+        range="$local_sha"
+      fi
+  else
+    range="$remote_sha..$local_sha"
+  fi
+
+  unsigned_commits=""
+
+	echo "commit range ${range}"
+  # Loop through each commit in range
+  for commit in $(git rev-list $range); do
+    # Skip merge commits
+    parent_count=$(git rev-list --parents -n 1 $commit | awk '{print NF-1}')
+    if [ "$parent_count" -gt 1 ]; then
+      echo "${CYAN}ℹ️  Skipping merge commit $commit${RESET}"
+      continue
+    fi
+    sig_status=$(git log --format='%G?' -n 1 $commit)	
+    # Currently only check for "N" - for no signature.
+    if [ "$sig_status" = "N" ]; then
+      unsigned_commits="$unsigned_commits $commit"
+    fi
+  done
+
+  # If there are unsigned commits, prompt the developer
+  if [ -n "$unsigned_commits" ]; then
+    echo "${RED}❌ Found unsigned commits:${RESET} $unsigned_commits"
+    echo
+    echo "${YELLOW}Do you want to automatically sign these commits? [y/N]${RESET}"
+    read -r answer </dev/tty
+
+    if [ "$answer" = "y" ] || [ "$answer" = "Y" ]; then
+      # The earliest local unsigned commit is the last in the list
+      earliest_commit=$(echo $unsigned_commits | awk '{print $NF}')
+      parent_commit=$(git rev-parse "${earliest_commit}^")
+
+      echo "${CYAN}🔧 Auto-signing earliest local unsigned commit $earliest_commit...${RESET}"
+      # Avoid flattening of merge commits
+      # Not sure, if we really want to make it this complex, ideally it should be fine even if we flatten merge commits.
+      # Unless, the merge commit appears on the local branch, when trying to sync with the upstreams
+      # If we face any issues doing this, we revert to either flattening or maybe check the '--rebase-merges' feasibility. Considering the requirement of git version
+      git rebase --onto "$parent_commit" "$parent_commit" \
+        --exec 'if [ $(git rev-list --parents -n 1 HEAD | awk "{print NF-1}") -eq 1 ]; then git commit --amend -sS --no-edit; else echo "Skipping merge commit $(git rev-parse --short HEAD)"; fi'
+
+      echo "${GREEN}✅ Earliest unsigned commit has been signed.${RESET}"
+      echo "Please push again: git push --force-with-lease"
+      exit 1
+    else
+      echo "${YELLOW}You can manually sign commits using:${RESET}"
+      echo
+      # Latest commit (HEAD)
+      echo "  - For the latest commit (HEAD):"
+      echo "      git commit --amend -sS --no-edit"
+      echo
+      # Earliest local unsigned commit
+      earliest_commit=$(echo $unsigned_commits | awk '{print $NF}')
+      short_hash=$(git rev-parse --short $earliest_commit)
+      parent_commit=$(git rev-parse "${earliest_commit}^")
+      echo "  - For the earliest unsigned commit $short_hash (skipping merge commits):"
+      echo "      git rebase --onto $parent_commit $parent_commit \\"
+      echo "        --exec 'if [ \$(git rev-list --parents -n 1 HEAD | awk \"{print NF-1}\") -eq 1 ]; then git commit --amend -sS --no-edit; else echo \"Skipping merge commit \$(git rev-parse --short HEAD)\"; fi'"
+      echo
+      echo "Then push normally with:"
+      echo "      git push"
+      echo
+      echo "Helpful resources:"
+      echo "   - GPG signing: https://docs.github.com/en/authentication/managing-commit-signature-verification/signing-commits"
+      echo
+      echo "${CYAN}💡 Tip: Enable automatic signing for all commits:${RESET}"
+      echo "   git config --global commit.gpgsign true"
+      echo "   git config --global user.signingkey <YOUR_KEY_ID>"
+      echo
+      exit 1
+    fi
+  fi
+done < "$TMP_FILE"
+
+rm -f "$TMP_FILE"
+
+echo "${GREEN}✅ No unsigned commits found${RESET}"

package.json

@@ -15,7 +15,7 @@
     "lint:strict": "eslint --max-warnings=0 src",
     "format": "prettier --write .",
     "format:check": "prettier -c -w .",
-    "prepare": "husky install"
+    "prepare": "husky"
   },
   "dependencies": {
     "@dnd-kit/core": "^6.3.1",