prototype-builder git:20260404.3fe3b17A

Immutable. This exact content is served forever at /api/v1/blob/f8172f9bd16c2360.

---
name: prototype-builder
description: >-
  Builds or refines exploratory prototypes, especially working frontend or
  full-stack learning artifacts, to make ambiguous product direction concrete.
  Trigger with "build an exploratory prototype", "create a working prototype to
  test the concept", "build or refine a full-stack learning artifact", or
  "prototype to clarify scope".
allowed-tools: Bash, Read, Write
---

# Prototype Builder

> ⚠️ **STUB** — `execute.py` not yet implemented.
> Use the [prototype-companion-agent](../../agents/prototype-companion-agent.md) for the real logic.
> [See acceptance criteria](./acceptance-criteria.md)

## Purpose

Builds exploratory prototypes to make ambiguous product direction concrete. Use when the
team needs a working artifact to validate direction before committing to formal specs.

## When to Use

- Product direction is fuzzy and needs a tangible artifact
- A working frontend or full-stack demo would clarify scope better than written docs
- Refining an existing prototype to test a different direction