Extracts state machine structure from gen_statem/GenStateMachine source code.

Parses Elixir source with Code.string_to_quoted/1 and walks the AST to extract states, transitions, initial state, and callback mode. Supports both handle_event_function and state_functions callback modes.

Usage

{:ok, result} = TLX.Extractor.GenStatem.extract_from_file("lib/my_machine.ex")

result.states       #=> [:idle, :running, :done]
result.initial      #=> :idle
result.transitions  #=> [%{event: :start, from: :idle, to: :running, ...}, ...]

The result can feed into TLX.Patterns.OTP.StateMachine or TLX.Importer.Codegen.from_state_machine/3.