Struct ModelChangeRecord 

pub struct ModelChangeRecord {
    pub turn: usize,
    pub from_model: String,
    pub to_model: String,
    pub reasoning_filtered: bool,
    pub reasoning_artifacts_filtered: usize,
    pub timestamp_ms: i64,
}

One mid-session model switch, as Agent::switch_model records it when Config::model_switch_allow_switch is on (see that field’s doc comment for the exact gate — with the knob off, switch_model never creates one of these at all, matching Agent::set_model’s pre-existing, record-free mechanics byte-for-byte).

Fields

turn: usize

0-based index of the model round-trip THIS switch takes effect before (i.e. Agent::turn_index at the moment of the switch) — the same per-turn addressing crate::usage_log::UsageRecord::turn uses, so the two logs can be correlated.

from_model: String

The model id in effect immediately before this switch.

to_model: String

The model id in effect immediately after this switch.

reasoning_filtered: bool

Whether reduce::rehydrate::filter_reasoning_artifacts ran over the live history as part of this switch (dep 8) — always true when this record exists at all (a record is only ever created under allow_switch = true, which is the same gate that runs the filter), but recorded explicitly rather than implied, so a reader of the persisted log alone (without also knowing the config that produced it) can see the safety guarantee held for this specific switch.

reasoning_artifacts_filtered: usize

Count of ChatMessages the reasoning-artifact filter actually touched (stripped a metadata key from, or removed a content_parts reasoning block from) during this switch. 0 is a legitimate, common value (nothing to filter yet), not an error signal.

timestamp_ms: i64

Unix-ms wall-clock time the switch happened.

Implementations

impl ModelChangeRecord

pub fn new( turn: usize, from_model: impl Into<String>, to_model: impl Into<String>, reasoning_filtered: bool, reasoning_artifacts_filtered: usize, timestamp_ms: i64, ) -> ModelChangeRecord

Build a record — the constructor Agent::switch_model calls.

Trait Implementations

impl Clone for ModelChangeRecord

fn clone(&self) -> ModelChangeRecord

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ModelChangeRecord

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

Formats the value using the given formatter.

impl Default for ModelChangeRecord

fn default() -> ModelChangeRecord

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for ModelChangeRecord

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for ModelChangeRecord

fn eq(&self, other: &ModelChangeRecord) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl Serialize for ModelChangeRecord

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for ModelChangeRecord