How to fix remote: error: hook declined to update refs/heads/main in Git

git push origin main
# Read all output between "remote:" lines

# View protection rules in repository Settings > Branches
# Or use GitHub CLI
gh api repos/{owner}/{repo}/branches/{branch}/protection

# Settings > Repository > Protected Branches
# Check who can push and merge

# Repository Settings > Branch Permissions

# View recent commit messages
git log -3 --oneline

# Amend the most recent commit message
git commit --amend -m "feat: add user authentication (PROJ-123)"

# Interactive rebase to fix multiple commits
git rebase -i HEAD~3
# Change "pick" to "reword" for commits to fix

# Find large files in your recent commits
git rev-list --objects --all | \
  git cat-file --batch-check='%(objecttype) %(objectname) %(objectsize) %(rest)' | \
  awk '/^blob/ {print substr($0,6)}' | \
  sort -k2 -n | \
  tail -20

# Check specific commit
git show --stat HEAD

# Remove large file from history
git filter-branch --tree-filter 'rm -f path/to/large/file' HEAD
# Or use git-filter-repo (recommended)
git filter-repo --path path/to/large/file --invert-paths

git lfs install
git lfs track "*.psd"
git add .gitattributes

# Check your current git identity
git config user.name
git config user.email

# Update to match requirements (e.g., company email)
git config user.email "[email protected]"
git config user.name "Your Name"

# Amend author of last commit
git commit --amend --author="Your Name <[email protected]>" --no-edit

# Fix author for multiple commits
git rebase -i HEAD~3
# Mark commits with "edit", then for each:
git commit --amend --author="Your Name <[email protected]>" --no-edit
git rebase --continue

# Create and push to a feature branch
git checkout -b feature/my-changes
git push -u origin feature/my-changes

# Create PR via GitHub CLI
gh pr create --title "Add feature" --body "Description"

# Or via GitLab CLI
glab mr create --title "Add feature"

# Or push to a different branch
git push origin HEAD:feature/my-changes

# Get repository administrators
# GitHub:
gh api repos/{owner}/{repo}/collaborators --jq '.[] | select(.permissions.admin==true) | .login'

# Check repository settings/documentation
cat CONTRIBUTING.md
cat .github/PULL_REQUEST_TEMPLATE.md