Class: SwarmCLI::InteractiveREPL

Inherits:
Object
  • Object
show all
Defined in:
lib/swarm_cli/interactive_repl.rb

Overview

InteractiveREPL provides a professional, interactive terminal interface for conversing with SwarmSDK agents.

Features:

  • Multiline input with intuitive submission (Enter on empty line or Ctrl+D)
  • Beautiful Markdown rendering for agent responses
  • Progress indicators during processing
  • Command system (/help, /exit, /clear, etc.)
  • Conversation history with context preservation
  • Professional styling with Pastel and TTY tools

Constant Summary collapse

COMMANDS = 
{
  "/help" => "Show available commands",
  "/clear" => "Clear the lead agent's conversation context",
  "/tools" => "List the lead agent's available tools",
  "/history" => "Show conversation history",
  "/defrag" => "Run memory defragmentation workflow (find and link related entries)",
  "/exit" => "Exit the REPL (or press Ctrl+D)",
}.freeze
HISTORY_SIZE =

History configuration

1000

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(swarm:, options:, initial_message: nil) ⇒ InteractiveREPL

Returns a new instance of InteractiveREPL.



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# File 'lib/swarm_cli/interactive_repl.rb', line 43

def initialize(swarm:, options:, initial_message: nil)
  @swarm = swarm
  @options = options
  @initial_message = initial_message
  @conversation_history = []
  @session_results = [] # Accumulate all results for session summary
  @validation_warnings_shown = false

  setup_ui_components
  setup_persistent_history

  # Create formatter for swarm execution output (interactive mode)
  @formatter = Formatters::HumanFormatter.new(
    output: $stdout,
    quiet: options.quiet?,
    truncate: options.truncate?,
    verbose: options.verbose?,
    mode: :interactive,
  )
end

Class Method Details

.history_file ⇒ Object

Get history file path (can be overridden with SWARM_HISTORY env var)



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# File 'lib/swarm_cli/interactive_repl.rb', line 38

def history_file
  ENV["SWARM_HISTORY"] || File.expand_path("~/.swarm/history")
end

Instance Method Details

#execute_with_cancellation(input, &log_callback) ⇒ SwarmSDK::Result?

Execute a message with Ctrl+C cancellation support Public for testing

Parameters:

  • input (String) —

    User input to execute

Returns:



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# File 'lib/swarm_cli/interactive_repl.rb', line 96

def execute_with_cancellation(input, &log_callback)
  cancelled = false
  result = nil

  # Execute in Async block to enable Ctrl+C cancellation
  Async do |task|
    # Use Async::Condition for trap-safe cancellation
    # (Condition#signal uses Thread::Queue which is safe from trap context)
    cancel_condition = Async::Condition.new

    # Install trap ONLY during execution
    # When Ctrl+C is pressed, signal the condition instead of calling task.stop
    old_trap = trap("INT") do
      cancel_condition.signal(:cancel)
    end

    begin
      # Execute swarm in async task
      llm_task = task.async do
        @swarm.execute(input, &log_callback)
      end

      # Monitor task - watches for cancellation signal
      # Must be created AFTER llm_task so it can reference it
      monitor_task = task.async do
        if cancel_condition.wait == :cancel
          cancelled = true
          llm_task.stop
        end
      end

      result = llm_task.wait
    rescue Async::Stop
      # Task was stopped by Ctrl+C
      cancelled = true
    ensure
      # Clean up monitor task
      monitor_task&.stop if monitor_task&.alive?

      # CRITICAL: Restore old trap when done
      # This ensures Ctrl+C at the prompt still exits the REPL
      trap("INT", old_trap)
    end
  end.wait

  cancelled ? nil : result
end

#handle_command(input) ⇒ Object

Handle slash commands Public for testing

Parameters:

  • input (String) —

    Command input (e.g., "/help", "/clear")



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# File 'lib/swarm_cli/interactive_repl.rb', line 148

def handle_command(input)
  command = input.split.first.downcase

  case command
  when "/help"
    display_help
  when "/clear"
    clear_context
  when "/tools"
    list_tools
  when "/history"
    display_history
  when "/defrag"
    defrag_memory
  when "/exit"
    # Break from main loop to trigger session summary
    throw(:exit_repl)
  else
    puts render_error("Unknown command: #{command}")
    puts @colors[:system].call("Type /help for available commands")
  end
end

#run ⇒ Object 



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# File 'lib/swarm_cli/interactive_repl.rb', line 64

def run
  display_welcome

  # Emit validation warnings before first prompt
  emit_validation_warnings_before_prompt

  # Send initial message if provided
  if @initial_message && !@initial_message.empty?
    handle_message(@initial_message)
  end

  main_loop
  display_goodbye
  display_session_summary
rescue Interrupt
  puts "\n"
  display_goodbye
  display_session_summary
  exit(130)
ensure
  # Defensive: ensure all spinners are stopped on exit
  @formatter&.&.stop_all

  # Save history on exit
  save_persistent_history
end

#save_persistent_history ⇒ void

This method returns an undefined value.

Save persistent history to file Public for testing



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# File 'lib/swarm_cli/interactive_repl.rb', line 175

def save_persistent_history
  history_file = self.class.history_file
  return unless history_file

  history = Reline::HISTORY.to_a

  # Limit to configured size
  if HISTORY_SIZE.positive? && history.size > HISTORY_SIZE
    history = history.last(HISTORY_SIZE)
  end

  # Write with secure permissions (owner read/write only)
  File.open(history_file, "w", 0o600, encoding: Encoding::UTF_8) do |f|
    # Handle multi-line entries by escaping newlines with backslash
    history.each do |entry|
      escaped = entry.scrub.split("\n").join("\\\n")
      f.puts(escaped)
    end
  end
rescue Errno::EACCES, Errno::ENOENT
  # Can't write history - continue anyway
  nil
end