---
name: brainstorm
description: "Use when you need the /brainstorm game-production workflow. Guided game concept ideation — from zero idea to a structured game concept document. Uses professional studio ideation techniques, player psychology frameworks, and structured creative exploration."
---

# Brainstorm

Run the Codex Game Studios brainstorm workflow.

Before acting, read `DETAILS.md` for the full workflow. Apply project guidance from `AGENTS.md` and use `../../standards/` for path-specific standards.

Director gates use the bundled custom agents from `../../runtime/agents/`. If the current project does not already have those agents installed in `.codex/agents/`, run `$setup-runtime` first.

Review mode controls review-gate intensity, not all custom-agent usage:
`full` runs key director/lead gates, `lean` runs only PHASE-GATE checks such as
`/gate-check`, and `solo` skips director review gates.

`/brainstorm` writes two brainstorm-stage artifacts:
`design/gdd/game-concept.md` and `design/gdd/game-pillars.md`. In
`--review full` mode, `/brainstorm` calls the `creative-director` custom agent
during the CD-PILLARS gate and gives that subagent responsibility for creating
or updating `design/gdd/game-pillars.md`. In `lean` or `solo` mode, the main
brainstorm workflow writes the initial pillar document directly.