Function parse_trace 

pub fn parse_trace(
    input: &str,
    limits: &Limits,
) -> Result<Vec<TraceEvent>, TraceParseError>

Parses a JSON Lines trace document into events, enforcing Limits.

Errors

Returns the first TraceParseError encountered, addressed by 1-based line number. An empty document yields an empty event list (validating an empty trace is the engine’s question, not the parser’s).

use mcp_trace_validator::reader::{Limits, parse_trace};

let line = r#"{"seq":0,"direction":"client-to-server","transport":"stdio","kind":"lifecycle","event":"transport-open"}"#;
assert_eq!(parse_trace(line, &Limits::default())?.len(), 1);
assert!(parse_trace("not json", &Limits::default()).is_err());