Constant MAX_JSONL_BYTES 

pub const MAX_JSONL_BYTES: u64 = _; // 209_715_200u64

Hard cap on JSONL file size accepted by usage::parse_jsonl_entries and chat::parse_chat_events.

Parsing is streaming (BufReader::lines()), so memory is O(1) per line — this cap only exists to keep a runaway / corrupted file from blocking the caller indefinitely. Real agent sessions (Task-tool sub-agents) frequently exceed 30MB, so the cap is set generously at 200MB.