Rapid prototyping workflow. Skips normal standards to quickly validate a game concept or mechanic. Produces throwaway code and a structured prototype report.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
## Phase 1: Define the Question
Resolve the review mode (once, store for all gate spawns this run):
1. If `--review [full|lean|solo]` was passed → use that
2. Else read `production/review-mode.txt` → use that value
3. Else → default to `lean`
See `docs/framework/director-gates.md` for the full check pattern.
Read the concept description from the argument. Identify the core question this prototype must answer. If the concept is vague, state the question explicitly before proceeding — a prototype without a clear question wastes time.
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## Phase 2: Load Project Context
Read `AGENTS.md` for project context and the current tech stack. Understand what engine, language, and frameworks are in use so the prototype is built with compatible tooling.
---
## Phase 3: Plan the Prototype
Define in 3-5 bullet points what the minimum viable prototype looks like:
- What is the core question?
- What is the absolute minimum code needed to answer it?
- What can be skipped (error handling, polish, architecture)?
Present this plan to the user before building. Ask for confirmation if scope seems unclear.
---
## Phase 4: Implement
…
The line at the top of this page pins the label git:20260622.a7ad6fe, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
GET https://markdownregistry.com/api/v1/artifacts/art_cgpaifevtr4lr472
GET https://markdownregistry.com/api/v1/resolve?ref=striderza/opencodegamestudios/prototype
GET https://markdownregistry.com/api/v1/blob/606e8adbdb567afcb840e6d56f42eff5e7614b98f4c3eb107d54c6411e8cd9d5
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
striderza/opencodegamestudios · .agents/modules/architecture/skills/architecture-review/SKILL.md · Validates completeness and consistency of the project architecture against all GDDs. Builds a traceability matrix…
striderza/opencodegamestudios · .agents/modules/architecture/skills/create-control-manifest/SKILL.md · After architecture is complete, produces a flat actionable rules sheet for programmers — what you must do, what you…
striderza/opencodegamestudios · .agents/modules/architecture/skills/propagate-design-change/SKILL.md · When a GDD is revised, scans all ADRs and the traceability index to identify which architectural decisions are now…
striderza/opencodegamestudios · .agents/modules/art/skills/art-bible/SKILL.md · Guided, section-by-section Art Bible authoring. Creates the visual identity specification that gates all asset…
striderza/opencodegamestudios · .agents/modules/art/skills/art-generate/SKILL.md · Generates placeholder .aseprite files from asset specs using the Aseprite MCP. Reads asset specs and art bible, creates…
striderza/opencodegamestudios · .agents/modules/art/skills/asset-audit/SKILL.md · Audits game assets for compliance with naming conventions, file size budgets, format standards, and pipeline…
striderza/opencodegamestudios · .agents/modules/art/skills/asset-spec/SKILL.md · Generate per-asset visual specifications and AI generation prompts from GDDs, level docs, or character profiles…
striderza/opencodegamestudios · .agents/modules/core/skills/architecture-decision/SKILL.md · Creates an Architecture Decision Record (ADR) documenting a significant technical decision, its context, alternatives…
striderza/opencodegamestudios · .agents/modules/core/skills/concept-brainstorm/SKILL.md · Guided game concept ideation — from zero idea to a structured game concept document. Uses professional studio ideation…
striderza/opencodegamestudios · .agents/modules/core/skills/create-architecture/SKILL.md · Guided, section-by-section authoring of the master architecture document for the game. Reads all GDDs, the systems…
striderza/opencodegamestudios · .agents/modules/core/skills/gate-check/SKILL.md · Validate readiness to advance between development phases. Produces a PASS/CONCERNS/FAIL verdict with specific blockers…
emilkowalski/skills · skills/prototype/SKILL.md · Build multiple genuinely different versions of a UI piece you describe, rendered behind a visual picker so you can flip…
plugin87/ux-ui-agent-skills · .claude/skills/prototype/SKILL.md · Move an idea up the fidelity ladder (content-first → wireframe → low-fi → high-fi → code) with a validation plan at…
mxyhi/ok-skills · prototype/SKILL.md · Build a throwaway prototype to answer a design question. Use when the user wants to sanity-check whether a state model…
tobihagemann/turbo · claude/skills/prototype/SKILL.md · Build a self-contained local prototype at .turbo/prototypes/<slug>.html, drive it, and hand it to the user to settle…
tobihagemann/turbo · codex/skills/prototype/SKILL.md · Build a self-contained local prototype at .turbo/prototypes/<slug>.html, drive it, and hand it to the user to settle…
asymmetric-al/core · .agents/skills/prototype/SKILL.md · Build a throwaway prototype to answer a design question. Use when the user wants to sanity-check whether a state model…
swingerman/engineer · engineer/skills/prototype/SKILL.md · Use to rough out a working thing fast, zero ceremony, before committing to the pipeline — the prototype IS the spec…
