lean-ctx 3.5.4

Context Runtime for AI Agents with CCP. 57 MCP tools, 10 read modes, 95+ compression patterns, cross-session memory (CCP), persistent AI knowledge with temporal facts + contradiction detection, multi-agent context sharing + diaries, LITM-aware positioning, AAAK compact format, adaptive compression with Thompson Sampling bandits. Supports 24 AI tools. Reduces LLM token consumption by up to 99%.
Documentation 
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use std::sync::atomic::{AtomicU64, Ordering};
use std::sync::Mutex;

use serde::Serialize;

/// Process-local metrics for Context OS observability.
#[derive(Default)]
pub struct ContextOsMetrics {
    events_appended: AtomicU64,
    events_broadcast: AtomicU64,
    events_replayed: AtomicU64,
    sse_connections_opened: AtomicU64,
    sse_connections_closed: AtomicU64,
    shared_sessions_loaded: AtomicU64,
    shared_sessions_persisted: AtomicU64,
    active_workspaces: Mutex<std::collections::HashSet<String>>,
}

#[derive(Debug, Clone, Serialize)]
#[serde(rename_all = "camelCase")]
pub struct MetricsSnapshot {
    pub events_appended: u64,
    pub events_broadcast: u64,
    pub events_replayed: u64,
    pub sse_connections_active: u64,
    pub sse_connections_total: u64,
    pub shared_sessions_loaded: u64,
    pub shared_sessions_persisted: u64,
    pub active_workspace_count: usize,
}

impl ContextOsMetrics {
    pub fn record_event_appended(&self) {
        self.events_appended.fetch_add(1, Ordering::Relaxed);
    }

    pub fn record_event_broadcast(&self) {
        self.events_broadcast.fetch_add(1, Ordering::Relaxed);
    }

    pub fn record_events_replayed(&self, count: u64) {
        self.events_replayed.fetch_add(count, Ordering::Relaxed);
    }

    pub fn record_sse_connect(&self) {
        self.sse_connections_opened.fetch_add(1, Ordering::Relaxed);
    }

    pub fn record_sse_disconnect(&self) {
        self.sse_connections_closed.fetch_add(1, Ordering::Relaxed);
    }

    pub fn record_session_loaded(&self) {
        self.shared_sessions_loaded.fetch_add(1, Ordering::Relaxed);
    }

    pub fn record_session_persisted(&self) {
        self.shared_sessions_persisted
            .fetch_add(1, Ordering::Relaxed);
    }

    pub fn record_workspace_active(&self, workspace_id: &str) {
        if let Ok(mut set) = self.active_workspaces.lock() {
            set.insert(workspace_id.to_string());
        }
    }

    pub fn snapshot(&self) -> MetricsSnapshot {
        let opened = self.sse_connections_opened.load(Ordering::Relaxed);
        let closed = self.sse_connections_closed.load(Ordering::Relaxed);
        MetricsSnapshot {
            events_appended: self.events_appended.load(Ordering::Relaxed),
            events_broadcast: self.events_broadcast.load(Ordering::Relaxed),
            events_replayed: self.events_replayed.load(Ordering::Relaxed),
            sse_connections_active: opened.saturating_sub(closed),
            sse_connections_total: opened,
            shared_sessions_loaded: self.shared_sessions_loaded.load(Ordering::Relaxed),
            shared_sessions_persisted: self.shared_sessions_persisted.load(Ordering::Relaxed),
            active_workspace_count: self.active_workspaces.lock().map_or(0, |s| s.len()),
        }
    }
}