Neural Prediction Settings Technical Specification

Source Location Reference

All facts in the Neural Settings wiki page are sourced from:

Fact	Source File	Line(s)	Value
Beam width default	Config.kt	130	NEURAL_BEAM_WIDTH = 6
Beam width range 1-32	backup/SettingsValidation.kt	-	"neural_beam_width" -> value in 1..32
Max sequence length default	Config.kt	115	NEURAL_MAX_LENGTH = 20
Confidence threshold default	Config.kt	116	NEURAL_CONFIDENCE_THRESHOLD = 0.01f
ONNX threads default	Config.kt	247	ONNX_XNNPACK_THREADS = 2
ONNX threads range 1-8	onnx/ModelLoader.kt	tryXnnpack()	threadCount.coerceIn(1, 8)
Swipe typing default on	Config.kt	90	SWIPE_TYPING_ENABLED = true
Swipe on password default off	Config.kt	91	SWIPE_ON_PASSWORD_FIELDS = false
ONNX model format	onnx/ModelLoader.kt	class	ONNX Runtime Android
Beam search decoder	neural/BeamSearchDecoder.kt	class	Vocabulary-constrained beam search

Key Components

Component	File	Purpose
Neural Defaults	Config.kt:Defaults (line 114-135)	All default values
Settings UI	SettingsActivity.kt (line 1370-1450)	Neural Prediction section
Model Loader	onnx/ModelLoader.kt	ONNX model initialization and XNNPACK config
Beam Decoder	neural/BeamSearchDecoder.kt	Word prediction from swipe trajectories
Prediction Engine	neural/NeuralPredictionEngine.kt	Coordinates model inference and ranking

Settings Preference Keys

Preference Key	Type	Default	Config.kt field
swipe_typing	Boolean	true	swipe_typing_enabled
swipe_on_password	Boolean	false	swipe_on_password_fields
neural_beam_width	Int	6	neural_beam_width
neural_confidence_threshold	Float	0.01	neural_confidence_threshold
neural_max_length	Int	20	neural_max_length
onnx_xnnpack_threads	Int	2	onnx_xnnpack_threads
neural_frequency_weight	Float	0.57	neural_frequency_weight
neural_batch_beams	Boolean	false	neural_batch_beams

Related Specifications

• Swipe Typing Spec
• Setup Spec