When to use it
Use it when starting a new project or repo, adopting or auditing an existing one, setting up agent guardrails, writing or fixing AGENTS.md or CLAUDE.md, defining a PR contract or branch protection, or when the user says "harness", "initial setup", "the standard", "my conventions", "best practices", "set up the repo", "agent rules", "arnés", "setup inicial", "mi estándar", "mis convenciones", "buenas prácticas", "reglas para los agentes" — or when a repo has no AGENTS.md, no PR template, or rules nobody can run.