use async_trait::async_trait;
use tokio::sync::Mutex;
use crate::error::Result;
use crate::interfaces::brain::{BrainContext, BrainEvent, BrainPlugin};
#[derive(Debug, Clone)]
pub struct ZepEnrichment {
pub memories_count: u32,
pub summary: String,
}
pub struct ZepContextEnricherBrain {
last_enrichment: Mutex<Option<ZepEnrichment>>,
}
impl ZepContextEnricherBrain {
pub fn new() -> Self {
Self {
last_enrichment: Mutex::new(None),
}
}
pub async fn last_enrichment(&self) -> Option<ZepEnrichment> {
let guard = self.last_enrichment.lock().await;
guard.clone()
}
fn should_enrich(message: &str) -> bool {
let lower = message.to_lowercase();
["remember", "context", "earlier", "last time"]
.iter()
.any(|kw| lower.contains(kw))
}
}
#[async_trait]
impl BrainPlugin for ZepContextEnricherBrain {
fn name(&self) -> &str {
"zep_context_enricher"
}
fn description(&self) -> &str {
"Adds lightweight semantic memory enrichment"
}
async fn on_event(&self, event: BrainEvent, _ctx: &BrainContext) -> Result<()> {
if let BrainEvent::UserMessage { text, .. } = event {
if Self::should_enrich(&text) {
let enrichment = ZepEnrichment {
memories_count: 2,
summary: "Injected relevant past context".to_string(),
};
let mut guard = self.last_enrichment.lock().await;
*guard = Some(enrichment);
}
}
Ok(())
}
}