ModelRuntimeDefaults class

Runtime defaults resolved from a Hugging Face repo's deployment metadata (e.g. a litertlm_manifest.json), in flutter_gemma's own runtime vocabulary.

Every field is nullable: null means "the manifest is silent — use the SDK default". These are the how-to-run knobs the app passes to FlutterGemma.getActiveModel / createSession, NOT install-time identity. They are overridable defaults, never authoritative config baked into the model — an explicit argument at the call site always wins over the field here, which in turn wins over the SDK default.

Kept as its own value object (separate from ResolvedHfModel's identity fields) so the identity record — InferenceModelSpec — never grows runtime fields, preserving flutter_gemma's install-vs-runtime separation. It also makes the merge a pure function: explicit ?? defaults?.x ?? sdkDefault.

Constructors

ModelRuntimeDefaults({int? maxTokens, PreferredBackend? preferredBackend, bool? supportImage, bool? supportAudio, bool? isThinking, int? minOutputTokens})
const

Properties

hashCode → int
The hash code for this object.
no setterinherited
isThinking → bool?
Whether the model emits a thinking channel (capabilities.thinking.declared). Apply as createSession's enableThinking.
final
maxTokens → int?
Context-window size (maxTokens), if the manifest declares one (model.context_length). Still clamped by the engine downstream — a manifest cannot set a value the engine rejects.
final
minOutputTokens → int?
The minimum output-token budget the model needs (session_defaults.max_output_tokens_min) — e.g. a reasoning model is cut off mid-<think> below this. This is a FLOOR, not a cap: when you set createSession(maxOutputTokens:), keep it at or above this value (or leave the cap unset). Do NOT assume it is itself the cap to apply blindly — passing a floor into a smaller cap would truncate output.
final
preferredBackend → PreferredBackend?
Recommended text/decoder backend for this device.
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
supportAudio → bool?
Declared audio capability (capabilities.audio).
final
supportImage → bool?
Declared vision capability (capabilities.vision).
final

Methods

noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toString() → String
A string representation of this object.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited