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Session

mermaid_cli::domain::state

Struct Session 

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pub struct Session {
    pub conversation: ConversationHistory,
    pub model_id: String,
    pub reasoning: ReasoningLevel,
    pub cumulative_tokens: usize,
    pub last_token_usage: Option<TokenUsageTotals>,
    pub cumulative_token_usage: TokenUsageTotals,
    pub context_usage: Option<ContextUsageSnapshot>,
}
Expand description

Persistent conversational state that survives across turns.

“Session” here means the user-visible chat session, not the tokio runtime or the TCP connection to the provider. One chat = one Session = one on-disk ConversationHistory file.

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§conversation: ConversationHistory§model_id: String§reasoning: ReasoningLevel§cumulative_tokens: usize

Running total of tokens consumed across every API request in this session. Kept for CLI JSON compatibility; the richer prompt/completion breakdown lives in cumulative_token_usage.

§last_token_usage: Option<TokenUsageTotals>

Token usage for the most recent completed provider request. None means the provider did not report usage for that turn.

§cumulative_token_usage: TokenUsageTotals

Prompt/completion/total API usage accumulated for this session.

§context_usage: Option<ContextUsageSnapshot>

Latest model-visible context snapshot. This may be an estimate while a request is in flight and is replaced by provider-reported usage when available.

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impl Session

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pub fn messages(&self) -> &[ChatMessage]

The committed message log. All messages visible in the chat widget live here; partial in-flight content lives in TurnState::Generating.

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pub fn append(&mut self, msg: ChatMessage)

Append a committed assistant/user/tool message. Mutation happens through here so the reducer has one chokepoint to update the conversation’s updated_at and derived title. Pure — no I/O.

Trait Implementations§

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impl Clone for Session

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fn clone(&self) -> Session

Returns a duplicate of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for Session

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

Formats the value using the given formatter. Read more

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impl<S, D, Swp, Dwp, T> AdaptInto<D, Swp, Dwp, T> for S
where T: Real + Zero + Arithmetics + Clone, Swp: WhitePoint<T>, Dwp: WhitePoint<T>, D: AdaptFrom<S, Swp, Dwp, T>,

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fn adapt_into_using<M>(self, method: M) -> D
where M: TransformMatrix<T>,

Convert the source color to the destination color using the specified method.
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fn adapt_into(self) -> D

Convert the source color to the destination color using the bradford method by default.
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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T, C> ArraysFrom<C> for T
where C: IntoArrays<T>,

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fn arrays_from(colors: C) -> T

Cast a collection of colors into a collection of arrays.
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impl<T, C> ArraysInto<C> for T
where C: FromArrays<T>,

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fn arrays_into(self) -> C

Cast this collection of arrays into a collection of colors.
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where T: FromCam16Unclamped<WpParam, U>,

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type Scalar = <T as FromCam16Unclamped<WpParam, U>>::Scalar

The number type that’s used in parameters when converting.
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fn cam16_into_unclamped( self, parameters: BakedParameters<WpParam, <U as Cam16IntoUnclamped<WpParam, T>>::Scalar>, ) -> T

Converts self into C, using the provided parameters.
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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
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fn components_from(colors: C) -> T

Cast a collection of colors into a collection of color components.
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Returns the argument unchanged.

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Performs a conversion from angle.
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type Scalar = <T as Cam16FromUnclamped<WpParam, U>>::Scalar

The number type that’s used in parameters when converting.
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fn into_cam16_unclamped( self, parameters: BakedParameters<WpParam, <U as IntoCam16Unclamped<WpParam, T>>::Scalar>, ) -> T

Converts self into C, using the provided parameters.
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impl<T, U> IntoColor<U> for T
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fn into_color(self) -> U

Convert into T with values clamped to the color defined bounds Read more
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Convert into T. The resulting color might be invalid in its color space Read more
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Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn into_stimulus(self) -> T

Converts self into T, while performing the appropriate scaling, rounding and clamping.
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where T: Policy<B, E>, P: Policy<B, E>,

Create a new Policy that returns Action::Follow only if self and other return Action::Follow. Read more
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Create a new Policy that returns Action::Follow if either self or other returns Action::Follow. Read more
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impl<T, U> TryIntoColor<U> for T
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fn try_into_color(self) -> Result<U, OutOfBounds<U>>

Convert into T, returning ok if the color is inside of its defined range, otherwise an OutOfBounds error is returned which contains the unclamped color. Read more
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Cast a collection of colors into a collection of unsigned integers.
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