Tactics

Tactic is LLLM's center model. A tactic is a small, typed, service-ready unit that does one thing well.

Tactics provide:

• input and output type metadata,
• local run and async arun calls,
• optional streaming,
• CallContext request metadata,
• TacticInfo for services, package cards, and agent instructions.

from lllm import Tactic


class EchoTactic(Tactic[EchoInput, EchoOutput]):
    name = "echo"
    input_type = EchoInput
    output_type = EchoOutput

    def _run(self, input_value, *, context=None):
        return EchoOutput(text=input_value.text.upper())

The protocol stays runtime-agnostic. A tactic can hide a Pydantic AI agent, plain Python function, native prompt/dialog workflow, or remote service.