Claude Code Stop hook to auto-commit with the prompt

post_chat.rb

#!/usr/bin/env ruby
require 'json'
require 'tempfile'

# Read input from stdin
input_data = $stdin.read

# Parse JSON, exit non-zero if it fails
parsed_input = JSON.parse(input_data)

# Extract transcript path and working directory
transcript_path = parsed_input.dig('transcript_path')
cwd = parsed_input.dig('cwd')

# Change to the specified working directory
Dir.chdir(cwd) if cwd

# Read all entries and find the last user message with string content
last_user_entry = File.foreach(transcript_path)
  .map { |line| JSON.parse(line.strip) }
  .reverse
  .find { |entry| entry.dig('message', 'role') == 'user' && entry.dig('message', 'content').is_a?(String) }

# Extract message content from the last user entry
message_content = last_user_entry&.dig('message', 'content')

# Create temporary file with the message content
temp_file = Tempfile.new('commit_message')
begin
  temp_file.write(message_content)
  temp_file.close

  short_message = message_content.split("\n").first[0..50]

  system("git", "add", "-A")
  system("git", "commit", "-F", temp_file.path)
  system("osascript", "-e", "display notification \"#{short_message}\" with title \"✅ Claude Commit\" sound name \"Glass\"")
ensure
  temp_file.unlink
end