@spec generate(PtcRunner.SubAgent.Signature.signature() | nil, map() | nil) ::
  String.t()

Generate the expected output section from signature.

Shows the required return format based on the agent's signature, including field descriptions if available.

Parameters

• context_signature - Parsed signature for return type information
• field_descriptions - Optional map of field name atoms to description strings

Returns

A string containing the expected output section, or empty string if no signature.

Examples

iex> sig = {:signature, [{"x", :int}], :int}
iex> output = PtcRunner.SubAgent.SystemPrompt.Output.generate(sig, nil)
iex> output =~ "Expected Output"
true
iex> output =~ ":int"
true