Component

Invoker-based component templates used across Gen AI applications.

LMComponent(lm_invoker)

Bases: Component

A template component for LM-based components used across Gen AI applications.

Examples:

Define an LM component class

class MyLMComponent(LMComponent):
    prompt_vars = {"context", "query"}
    default_system_template = "Answer the query based on the following context: {context}"
    default_user_template = "{query}"

Init with LM invoker

component = MyLMComponent(lm_invoker=lm_invoker)

Init with LM configuration

component = MyLMComponent.from_config(
    model_id="openai/gpt-5.4-nano",
    config={"response_schema": ResponseSchema},
)

Attributes:

Name	Type	Description
prompt_vars	set[str]	Required prompt variables.
default_system_template	str	Default system template.
default_user_template	str	Default user template.

Initializes LMComponent with an LM invoker.

Parameters:

Name	Type	Description	Default
lm_invoker	BaseLMInvoker	The language model invoker.	required

Raises:

Type	Description
ValueError

from_config(model_id, credentials=None, config=None, system_template=None, user_template=None, prompt_builder_kwargs=None, **kwargs) classmethod

Builds an LM invoker from config and initializes the component.

Parameters:

Name	Type	Description	Default
model_id	str | ModelId	The model ID.	required
credentials	str | dict[str, Any] | None	Model credentials. Defaults to None.	None
config	dict[str, Any] | None	Model configuration. Defaults to None.	None
system_template	str | None	System template. Defaults to None.	None
user_template	str | None	User template. Defaults to None.	None
prompt_builder_kwargs	dict[str, Any] | None	Prompt builder kwargs. Defaults to None.	None
**kwargs	Any	Additional constructor kwargs for subclasses.	{}

Returns:

Name	Type	Description
Self	Self	A new LMComponent instance.