log-io 1.0.0

Structured logging pipeline for Rust. Zero-allocation fast path, JSON / logfmt / human-readable outputs, context propagation (request-id, trace-id), per-module filtering, async-safe sinks. An IO pipeline for log records, not a wrapper around log+tracing.
Documentation 
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//! Writing records to a file. Demonstrates building a fallible
//! [`FileSink`] up front and handing it to [`Logger::builder`].

use log_io::format::JsonFormat;
use log_io::sink::FileSink;
use log_io::{Level, Logger};

fn main() -> Result<(), Box<dyn std::error::Error>> {
    let path = std::env::temp_dir().join("log-io-example.jsonl");
    let sink = FileSink::append(&path, JsonFormat::new())?;

    let logger = Logger::builder().level(Level::Info).with_sink(sink).build();

    for i in 0..5 {
        log_io::info!(logger, "tick", i = i as u32);
    }
    logger.flush()?;

    println!("wrote logs to {}", path.display());
    Ok(())
}