system-prompt-builder

# System Prompt Builder Build production-grade system prompts and agent architectures by interviewing the user, then generating a complete, ready-to-paste instruction set. This skill does not hand back generic templates — it asks the right questions, enforces a set of hard-won design principles, and produces a system prompt the user can deploy as-is. The output is always a **complete, self-contained system prompt as a `.md` file**, optionally followed by a **review pass** that scores the result and names the single highest-impact improvement. --- ## The four archetypes Every system you'll build falls into one of four shapes. Each has a different skeleton, a different interview, and different failure modes. Your first job is to classify, because everything downstream depends on it. | Archetype | Build when the user wants… | Reference file | |-----------|----------------------------|----------------| | **A — Mode-based assistant** | A reusable assistant/tool that handles several distinct request types (commands/modes), each with its own output shape. *(e.g. a prompt-engineering helper with BUILD / REVIEW / GENERATE modes)* | `references/archetype-mode-based-assistant.md` | | **B — Phased human-in-the-loop agent** | An agent that researches/analyzes/plans across sequential phases, pausing for human confirmation, while the human keeps decision authority | `references/archetype-phased-agent.md` | | **C — Single-purpose task prompt** | One focused, repeatable instruction for ...