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BMAD-METHOD/docs/v4-to-v6-upgrade.md

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BMad v4 to v6 Upgrade Guide

Overview

BMad v6 represents a complete ground-up rewrite with significant architectural changes. This guide will help you migrate your v4 project to v6.

Automatic V4 Detection

When you run npm run install:bmad on a project with v4 installed, the installer automatically detects:

  • Legacy folders: Any folders starting with .bmad, bmad (lowercase), or Bmad
  • IDE command artifacts: Legacy bmad folders in IDE configuration directories (.claude/commands/, .cursor/commands/, etc.)

What Happens During Detection

  1. Automatic Backup of v4 Modules: All .bmad-* folders are moved to v4-backup/ in your project root

    • If a backup already exists, a timestamp is added to avoid conflicts
    • Example: .bmad-core → v4-backup/.bmad-core
    • Your project files and data are NOT affected

  2. IDE Command Cleanup Recommended: Legacy v4 IDE commands should be manually removed

    • Located in IDE config folders: .claude/commands/, .cursor/commands/, etc.
    • These old commands would still reference v4 folder structure if left in place
    • The installer provides copy/paste terminal commands for your platform
    • You can proceed without cleanup, but removing them prevents confusion with old v4 commands

Module Migration

Deprecated Modules

v4 Module v6 Status
.bmad-2d-phaser-game-dev Integrated into BMM
.bmad-2d-unity-game-dev Integrated into BMM
.bmad-godot-game-dev Integrated into BMM
.bmad-*-game-dev (any) Integrated into BMM
.bmad-infrastructure-devops Deprecated - New core devops agent coming in BMM
.bmad-creative-writing Not adapted - New module releasing soon

Game Development: All game development functionality has been consolidated and expanded within the BMM (BMad Method) module. Game-specific workflows now adapt to your game type and engine.

Architecture Changes

Folder Structure

v4 "Expansion Packs" Structure:

your-project/
├── .bmad-core/           # Was actually the BMad Method
├── .bmad-game-dev/       # Separate expansion packs
├── .bmad-creative-writing/
└── .bmad-infrastructure-devops/

v6 Unified Structure:

your-project/
└── bmad/                 # Single installation folder
    ├── core/            # Real core framework (applies to all modules)
    ├── bmm/             # BMad Method (software/game dev)
    ├── bmb/             # BMad Builder (create agents/workflows)
    ├── cis/             # Creative Intelligence Suite
    └── _cfg/            # Your customizations
        └── agents/      # Agent customization files

Key Concept Changes

  • v4 .bmad-core: Was actually the BMad Method
  • v6 bmad/core/: Is the real universal core framework
  • v6 bmad/bmm/: Is the BMad Method module
  • Module identification: All modules now have a config.yaml file

Project Progress Migration

If You've Completed Planning Phase (PRD/Architecture) with the BMad Method:

After running the v6 installer:

  1. Run workflow-init workflow to set up the guided workflow system
  2. Specify your project level when prompted:
    • If you followed v4's full workflow (PRD → Architecture → Stories), select Level 3 or 4
    • This tells v6 you've already completed planning and solutioning phases
  3. Document paths: Keep your existing paths during installation
    • Default PRD/Architecture location: docs/
    • Default stories location: docs/stories/
    • Accept these defaults if you're already using them in v4

Important: v6 workflows can handle both sharded and unsharded documents. You don't need to restructure your existing PRD or architecture files.

If You're Mid-Development (Stories Created/Implemented)

  1. Complete the v6 installation as above
  2. Run workflow-init and specify Level 3 or 4
  3. When ready to continue development, run the sprint-planning workflow (Phase 4)

Agent Customization Migration

v4 Agent Customization

In v4, you may have modified agent files directly in .bmad-* folders.

v6 Agent Customization

All customizations now go in bmad/_cfg/agents/ using customize files:

Example: Renaming an agent and changing communication style

File: bmad/_cfg/agents/bmm-pm.customize.yaml

# Customize the PM agent
persona:
  name: 'Captain Jack' # Override agent name
  role: 'Swashbuckling Product Owner'
  communication_style: |
    - Talk like a pirate
    - Use nautical metaphors for software concepts
    - Always upbeat and adventurous

How it works:

  • Base agent: bmad/bmm/agents/pm.md
  • Customization: bmad/_cfg/agents/bmm-pm.customize.yaml
  • Result: Agent uses your custom name and style, but updates don't overwrite your changes

Document Compatibility

Sharded vs Unsharded Documents

Good news: Unlike v4, v6 workflows are fully flexible with document structure:

  • ✅ Sharded documents (split into multiple files)
  • ✅ Unsharded documents (single file per section)
  • ✅ Custom sections for your project type
  • ✅ Mixed approaches

All workflow files are scanned automatically. No manual configuration needed.

Installation Steps

1. Clone Repository

git clone https://github.com/bmad-code-org/BMAD-METHOD
cd BMAD-METHOD
npm install

2. Run Installer on Your v4 Project

npx bmad-method install

Enter the full path to your v4 project when prompted.

3. Follow Interactive Prompts

The installer will:

  1. Detect v4 installation and offer to backup .bmad-* folders
  2. Prompt for recommended cleanup (you can skip)
  3. Let you select modules (recommend: BMM for software and or game development)
  4. Configure core settings (name, language, etc.)
  5. Configure module-specific options
  6. Configure IDE integrations

4. Accept Default Paths

If you're using:

  • docs/ for PRD and architecture
  • docs/stories/ for story files

Accept these defaults during installation.

5. Initialize Workflow

After installation:

# In your project have the agent mode run workflow-init, in Claude Code:
/workflow-init
# or run the analyst and tell the analyst after it loads
*workflow-init

Select Level 3 or 4 if you've already completed PRD/architecture in v4.

Post-Migration Checklist

  • v4 folders backed up to v4-backup/
  • v6 installed to bmad/ folder
  • workflow-init run with correct project level selected
  • Agent customizations migrated to bmad/_cfg/agents/ if needed
  • IDE integration working (test by listing agents)
  • For active development: sprint-planning workflow executed

Getting Help