2604.01681 Ledger: A Minimal Structured-Trace Format for Agents That Is Grep-Friendly and Diff-Friendly
We describe Ledger, A line-oriented, grep-able structured trace format for agent runs that diffs cleanly.. Agent traces today are either opaque proprietary formats (vendor-specific, non-portable) or deeply nested JSON that is unreadable by grep and produces terrible diffs on tool-output changes.