pig

-module(pig@agent@msg).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch, inline]).
-define(FILEPATH, "src/pig/agent/msg.gleam").
-export_type([agent_msg/0]).

-if(?OTP_RELEASE >= 27).
-define(MODULEDOC(Str), -moduledoc(Str)).
-define(DOC(Str), -doc(Str)).
-else.
-define(MODULEDOC(Str), -compile([])).
-define(DOC(Str), -compile([])).
-endif.

?MODULEDOC(
    " Agent message type for the sans-IO core.\n"
    "\n"
    " Messages drive the state machine. They represent both user inputs\n"
    " and runtime responses fed back into the core:\n"
    "\n"
    "   - `UserPrompt`       — a new prompt to process\n"
    "   - `ProviderResponded` — the LLM's response (or error)\n"
    "   - `ToolResults`       — tool execution outcomes\n"
).

-type agent_msg() :: {user_prompt, binary()} |
    {provider_responded,
        {ok, pig_protocol@message:message()} |
            {error, pig_protocol@error:ai_error()}} |
    {tool_results,
        list({pig_protocol@message:tool_call(),
            {ok, gleam@json:json()} | {error, pig@tool:tool_error()}})}.