📖 New to harness? Read README.md (日本語: README.ja.md) for concepts, terminology (Tier-A / rubric / Principal Skinner / foundation-sprint / ...), and the three-skill overview before diving into implementation details.

harness-init — Install the Harness Control Loop

Sets up a user project so the /harness series (harness-plan, harness-loop, harness-rules-update) can drive autonomous sprint development. This skill runs once per project; re-running reconciles existing configuration.

Required Reading — Open BEFORE doing the step

Claude Code tends to skim SKILL.md. For each step below you MUST open and read the listed reference file(s) before acting.