Lfm2ChatFormat class

LFM's ChatFormat: Lfm2ChatTemplate rendering paired with Lfm2StreamDecoder output splitting.

Covers the text and vision variants for LFM2 and LFM2.5. They share the same ChatML wire format and tool-call markers, but differ in whether tool declarations/results are wrapped in Liquid's LFM2-only tool tags.

Implemented types

• ChatFormat

Constructors

Lfm2ChatFormat({LfmToolTagStyle toolTagStyle = LfmToolTagStyle.lfm2, LfmToolCallSyntax toolCallSyntax = LfmToolCallSyntax.pythonic})

const

Properties

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

supportsThinking → bool

Whether this family has a dedicated reasoning ("thinking") channel.

no setter, override

toolCallSyntax → LfmToolCallSyntax

How assistant tool-call examples are rendered back into chat history.

final

toolTagStyle → LfmToolTagStyle

Whether tool declarations/results use LFM2 tags or LFM2.5 plain JSON.

final

Methods

decode(Stream<String> tokens) → Stream<ChatResponseUpdate>

Splits a raw generated-token stream into M.E.AI updates, separating prose (TextContent), reasoning (TextReasoningContent), and tool calls (FunctionCallContent).

override

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

render(Iterable<ChatMessage> messages, {Iterable<AIFunctionDeclaration> tools = const <AIFunctionDeclaration>[], bool enableThinking = false}) → RenderedPrompt

Renders messages (with optional tools) into the family's wire format.

override

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited