# Prototype

> Concept prototype — validate the core idea is worth designing before writing GDDs. Run right after $ai-game-studio:brainstorm and $ai-game-studio:setup-engine. Routes to HTML, Engine, or Paper path based on game type. Produces a throwaway build and a PROCEED/PIVOT/KILL verdict.

- Skill: `frabcd/prototype` (Agent Skill, multi-file: 3 files)
- Install (CLI): `npx skillmds@latest add frabcd/prototype`
- Raw SKILL.md: https://api.skillmd.com/api/skills/frabcd/prototype/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Web & Frontend
- Author: frabcd (https://skillmd.com/u/frabcd)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/frabcd/prototype

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> Port provenance: adapted from the pinned upstream source at `984023ddac0d5e27624f2baacde6105e45de375f` under MIT; see the repository parity ledger for the exact path and blob.

# Prototype

This is a full-fidelity Codex port of a large upstream studio workflow. Its
detailed phases, templates, checks, and handoff prompts live in
[`references/full-workflow.md`](references/full-workflow.md) to keep skill
discovery lightweight.

## Required procedure

1. Read `references/full-workflow.md` completely before executing this skill.
2. Follow its phases in order and preserve all approval, review, testing, and
   evidence gates.
3. Adapt shell syntax to the detected platform; use PowerShell on Windows and
   POSIX syntax on macOS/Linux.
4. Inherit the active Codex model and permission mode. Never weaken sandbox,
   approval, provenance, or human creative-control boundaries.
5. If a referenced project artifact is absent, report the gap and use the
   documented fallback instead of inventing completion evidence.