Trait Source 

pub trait Source: Send + Sync {
    // Required methods
    fn id(&self) -> SourceId;
    fn priority(&self) -> Priority;
    fn contribute<'life0, 'life1, 'async_trait>(
        &'life0 self,
        ctx: &'life1 BriefContext,
    ) -> Pin<Box<dyn Future<Output = Result<Vec<Contribution>, SourceError>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait,
             'life1: 'async_trait;
}

A pluggable contributor to the per-turn crate::types::Brief.

id is the stable label that ends up on every emitted crate::types::BriefMessage / crate::types::ToolSchema and in the crate::receipt::BriefReceipt. priority drives the budget floor pre-pruning. contribute is the work — read from ctx, return zero or more Contributions.

Implementations should:

• Keep contribute deterministic given ctx where possible.
• Honour ctx.budget as a hint but not a hard cap — pruning is the builder’s job.
• Return cheap, pre-rendered text; don’t perform heavy formatting per turn.

Required Methods

fn id(&self) -> SourceId

Stable identifier for this source. Receipts and message attribution key off this value.

fn priority(&self) -> Priority

Priority bucket. Drives budget floors and prune ordering.

fn contribute<'life0, 'life1, 'async_trait>( &'life0 self, ctx: &'life1 BriefContext, ) -> Pin<Box<dyn Future<Output = Result<Vec<Contribution>, SourceError>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

Produce zero or more Contributions for this turn.

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors

impl Source for ReceiptSource

impl Source for SystemPromptSource

impl Source for ToolCatalogSource

impl Source for UserMessageSource

impl<H: HistoryStore> Source for HistorySource<H>