Struct KeyboardFeatures 

pub struct KeyboardFeatures {

    pub typing_rate: f64,
    pub pause_count: u32,
    pub mean_pause_ms: f64,
    pub latency_variability: f64,
    pub hold_time_mean: f64,
    pub burst_index: f64,
    pub session_continuity: f64,
    pub typing_tap_count: u32,
    pub typing_cadence_stability: f64,
    pub typing_gap_ratio: f64,
    pub typing_interaction_intensity: f64,
    pub keyboard_scroll_rate: f64,
    pub navigation_key_count: u32,
}

Keyboard-derived behavioral features.

Note: Typing metrics (typing_rate, typing_tap_count, etc.) are computed from typing keys ONLY. Navigation keys (arrows, page up/down, home/end) are tracked separately via keyboard_scroll_rate to avoid inflating typing metrics during navigation-heavy text editing sessions.

Fields

typing_rate: f64

Typing keys per second (excludes navigation keys)

pause_count: u32

Number of idle gaps (pauses) per window

mean_pause_ms: f64

Average pause duration in milliseconds

latency_variability: f64

Standard deviation of inter-key intervals

hold_time_mean: f64

Average key hold duration in milliseconds

burst_index: f64

Burstiness index (0-1, higher = more bursty)

session_continuity: f64

Ratio of active typing time to total window time

typing_tap_count: u32

Total number of discrete typing tap events (excludes navigation keys)

typing_cadence_stability: f64

Normalized rhythmic consistency score (0-1, higher = more regular timing)

typing_gap_ratio: f64

Proportion of inter-tap intervals classified as gaps

typing_interaction_intensity: f64

Composite metric combining speed, cadence stability, and gap behavior (0-1)

keyboard_scroll_rate: f64

Navigation key events per second (arrow keys, page up/down, home/end) Tracked separately from typing to distinguish keyboard scrolling from mouse scrolling

navigation_key_count: u32

Total navigation key events in the window

Trait Implementations

impl Clone for KeyboardFeatures

fn clone(&self) -> KeyboardFeatures

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for KeyboardFeatures

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for KeyboardFeatures

fn default() -> KeyboardFeatures

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for KeyboardFeatures

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for KeyboardFeatures

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.