The harness layer for Claude Code — a reference implementation of harness engineering with hook-enforced dual review, state-machine gates that survive context compaction, and fail-closed safety where it counts. Quality gates that AI can't skip.
Latest release v5.1.1 · 6 Oct 2026
1 file for Claude Code: sd0x-harness CLAUDE.md — 2,694 tokens loaded in every session.
CLAUDE.md A 2,694 tok These files are sd0xdev/sd0x-harness's own configuration — they tell Claude Code how to work on this repository, so they are not mods to install elsewhere. Copy one as a starting point and replace the parts that are about this project.