by merlinhu1
Codex-native CLI for AI-assisted game development, scaffolding local projects with studio roles, bounded prompts, and hard-failing validation.
# Add to your Claude Code skills
git clone https://github.com/merlinhu1/codex-game-studioGuides for using ai agents skills like codex-game-studio.
codex-game-studio is an open-source ai agents skill for AI coding assistants such as Claude Code, Codex CLI, and ChatGPT, built by merlinhu1. Codex-native CLI for AI-assisted game development, scaffolding local projects with studio roles, bounded prompts, and hard-failing validation. It has 51 GitHub stars.
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Clone the repository with "git clone https://github.com/merlinhu1/codex-game-studio" and add it to your Claude Code skills directory (see the Installation section above).
codex-game-studio is primarily written in TypeScript. It is open-source under merlinhu1 on GitHub, so you can review or fork the full source.
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A blank AI coding chat is flexible, but game development needs repeatable studio structure. Someone has to protect the vision, keep milestones visible, review technical choices, validate gameplay changes, check accessibility, prepare release notes, and make sure decisions are not trapped in chat history.
Codex Game Studio gives a Codex session the shape of a game studio without turning it into a hosted project manager or game engine. You get tracked agents, skills, workflows, project state, and validation in ordinary files that humans can inspect in Git.
The template is deliberately clone-first: the visible AGENTS.md, .codex/agents/*.toml, .codex/workflows/*.md, and .agents/skills/*/SKILL.md files are the studio surface. init records project state; it does not regenerate or overwrite the studio template.
| Category | Count | Description |
|---|---|---|
| Agents | 50 | Codex custom agents across production, design, programming, art, audio, narrative, QA, localization, live ops, release, and engine support |
| Skills | 90 | Reusable studio actions under .agents/skills/*/SKILL.md, from onboarding and design through QA, release, team orchestration, and standards |
| Workflows | 61 | Tracked prompt workflows for market review, specs, stories, sprints, QA, security, release, hotfixes, vertical slices, and handoffs |
| Engine Tracks | 3 | Godot, Unity, and Unreal specialist context with engine references and validation checks |
| Templates | 57 | Packaged document templates for GDDs, ADRs, technical designs, playtests, releases, postmortems, risk registers, pitch docs, and more |
| Validation | built in | Hard-failing checks for package assets, template surfaces, project state, metadata, engine references, and future-only CLI drift |
Agents are organized like a small game studio: directors own vision and technical coherence, leads own domain direction, and specialists handle focused execution.
Tier 1 — Direction
creative-director technical-director producer
studio-orchestrator
Tier 2 — Department Leads
game-designer senior-game-designer senior-game-artist
audio-director localization-lead release-manager
market-analyst narrative-designer
Tier 3 — Specialists
gameplay-programmer engine-programmer ai-programmer
network-programmer tools-programmer ui-programmer
systems-designer level-designer economy-designer
game-feel-designer technical-artist sound-designer
writer world-builder ui-ux-designer
qa-playtester accessibility-specialist performance-analyst
devops-engineer security-engineer data-scientist
community-manager live-ops-designer
| Engine | Lead Agent | Focus |
|---|---|---|
| Godot 4 | godot-specialist |
GDScript, scenes, nodes, resources, signals, plugins, and Godot-specific validation |
| Unity | unity-specialist |
C#, packages, scenes, prefabs, UI Toolkit, Addressables, Cinemachine, and DOTS/ECS context |
| Unreal Engine 5 | unreal-specialist |
C++, Blueprints, GAS, replication, UMG/CommonUI, plugins, and Unreal project conventions |
Skills are tracked under .agents/skills/*/SKILL.md. They are the reusable studio actions Codex can apply while working inside the template.
Onboarding & Navigation
cgs-start cgs-help cgs-project-stage-detect cgs-setup-engine cgs-adopt cgs-onboard
Game Design
cgs-brainstorm cgs-map-systems cgs-design-system cgs-quick-design cgs-review-all-gdds cgs-propagate-design-change cgs-balance-check
Art & Assets
cgs-art-bible cgs-asset-spec cgs-asset-audit
UX & Interface
cgs-ux-design cgs-ux-review cgs-ui-ux-review
Architecture & Technical Planning
cgs-create-architecture cgs-architecture-decision cgs-architecture-review cgs-create-control-manifest
Stories & Sprints
cgs-create-epics cgs-create-stories cgs-dev-story cgs-sprint-plan cgs-sprint-status cgs-story-readiness cgs-story-done cgs-estimate cgs-vertical-slice
Reviews & Analysis
cgs-design-review cgs-code-review cgs-scope-check cgs-perf-profile cgs-tech-debt cgs-gate-check cgs-consistency-check cgs-security-audit cgs-content-audit
QA & Testing
cgs-qa-plan cgs-smoke-check cgs-soak-test cgs-regression-suite cgs-test-setup cgs-test-helpers cgs-test-evidence-review cgs-test-flakiness cgs-skill-test cgs-skill-improve
Production
cgs-milestone-review cgs-retrospective cgs-bug-report cgs-bug-triage cgs-bugfix cgs-reverse-document cgs-playtest-report
Release
cgs-release-checklist cgs-launch-checklist cgs-changelog cgs-patch-notes cgs-hotfix cgs-day-one-patch
Creative & Content
cgs-prototype cgs-localize
Team Orchestration
cgs-team-combat cgs-team-narrative cgs-team-ui cgs-team-release cgs-team-polish cgs-team-audio cgs-team-level cgs-team-live-ops cgs-team-qa
Path Standards
cgs-standards-ai-code cgs-standards-data-files cgs-standards-design-docs cgs-standards-engine-code cgs-standards-gameplay cgs-standards-gameplay-code cgs-standards-narrative cgs-standards-network-code cgs-standards-prototype cgs-standards-prototype-code cgs-standards-shader-code cgs-standards-test-standards cgs-standards-tests cgs-standards-ui cgs-standards-ui-code
Workflow prompts live under .codex/workflows/*.md. They are inspection-friendly prompt surfaces; shortcut commands render prompts and do not launch Codex unless you explicitly run a role or task.
| Phase | Workflows |
|---|---|
| Tracked Prompts (61) | accessibility-doc, analytics-setup, architecture-decision, architecture-review, art-bible, art-direction, asset-audit, asset-spec, balance-check, brainstorm, bug-report, bugfix, changelog, code-review, consistency-check, control-manifest, create-architecture, create-epics, create-stories, design-review, design-review-concept, design-spec, design-system, engine-setup, entity-inventory, game-concept, game-feel-tuning, handoff, hotfix, implement, launch-checklist, localization-plan, map-systems, market-analysis, onboard, patch-notes, perf-profile, playtest, playtest-polish, production-milestone, prototype, qa-plan, regression-suite, release-checklist, retrospective, review, review-all-gdds, scope-check, security-audit, ship-check, sprint-plan, sprint-status, story-done, story-readiness, team-feature, team-polish, test-setup, ui-ux-review, ux-design, ux-review, vertical-slice |
PATH for run <role> and full validationClone the template repository:
git clone git@github.com:merlinhu1/codex-game-studio.git signal-cartographer
cd signal-cartographer
Install and build the CLI:
npm install
npm run build
Initialize project state:
./codex-game-studio init --name "Signal Cartographer" --engine godot --mode prototype --non-interactive \
--concept "A compact puzzle game about routing trains through haunted switchyards"
init turns the checkout into a game workspace: it keeps the game-facing agents, workflows, skills, templates, engine references, an