Zero Defect

This puts Claude into a strict operational mode for work where you absolutely cannot afford mistakes: production deployments, financial logic, security code. It enforces eight precision rules like "read before writing" and "verify before claiming," plus a pre-commit gate that requires you to actually run tests and confirm imports before saying anything is done. The anti-pattern table is especially useful, calling out things like editing without re-reading files or assuming APIs exist because they sound right. It's heavy-handed by design, trading speed for accuracy. If you're prototyping or exploring, you'll find it frustrating. But when the stakes are high and a hallucinated function name could break production, the discipline is worth it.

skills.sh installs: 323
GitHub stars: 602
last updated: Aug 21, 2026

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Install

$ npx -y skills add sharpdeveye/maestro --skill zero-defect --agent claude-code

Installs into .claude/skills of the current project.

Files

MANDATORY PREPARATION

Invoke /agent-workflow — it contains workflow principles, anti-patterns, and the Context Gathering Protocol. Follow the protocol before proceeding — if no workflow context exists yet, you MUST run /teach-maestro first.

Activate maximum precision mode for the current session. This command establishes execution-time discipline — not for the workflow design, but for how the agent itself operates. Every response, every code change, every claim must pass the zero-defect gate.

This is model-agnostic. It works with Claude, Gemini, GPT, Codex, or any AI agent.