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BMAD-METHOD/src/modules/bmm/workflows/3-solutioning/README.md

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# Solution Architecture Workflow
**Status:** Production-Ready | Scale-Adaptive Architecture Generation
---
## Overview
This workflow generates comprehensive, scale-adaptive solution architecture documentation tailored to your project type, technology stack, and scale level (0-4).
**Unique Features:**
-**Scale-adaptive**: Level 0 = skip, Levels 1-4 = progressive depth
-**Pattern-aware**: 171 technology combinations across 12 project types
-**Template-driven**: 11 complete architecture document templates
-**Engine-specific guidance**: Unity, Godot, Phaser, and more
-**GDD/PRD aware**: Uses Game Design Doc for games, PRD for everything else
-**ADR tracking**: Separate Architecture Decision Records document
-**Specialist integration**: Pattern-specific specialist recommendations
---
## When to Use
Run this workflow **AFTER** completing:
| Prerequisite | Required For | Location |
| -------------------------- | ----------------------------- | ---------------------------------- |
| **plan-project workflow** | All projects | `/docs/project-workflow-status.md` |
| **PRD with epics/stories** | Level 1+ projects | `/docs/PRD.md` |
| **GDD (for games)** | Game projects | `/docs/GDD.md` or `/docs/PRD.md` |
| **UX Specification** | UI projects (web/mobile/game) | `/docs/ux-specification.md` |
---
## Quick Start
```bash
workflow solution-architecture
```
**The workflow will:**
1. Load `project-workflow-status.md` (from plan-project)
2. Check prerequisites (PRD/GDD, UX spec if needed)
3. Read requirements (PRD for apps, GDD for games)
4. Ask architecture pattern questions
5. Load appropriate template and guide
6. Generate architecture + ADR documents
7. Run cohesion check validation
---
## Outputs
### Primary Documents
| File | Purpose | Notes |
| --------------------------- | ------------------------------------ | --------------------------------------------------- |
| `solution-architecture.md` | Complete architecture document | Pattern-specific sections |
| `architecture-decisions.md` | Architecture Decision Records (ADRs) | Tracks all decisions, options considered, rationale |
### Validation Outputs
| File | Purpose |
| -------------------------- | ----------------------------------- |
| `cohesion-check-report.md` | Validates 100% FR/NFR/Epic coverage |
| `epic-alignment-matrix.md` | Maps epics → components/tech/APIs |
---
## Project Types and Templates
### 12 Project Types Supported
| Type | Examples | Template | Guide Examples |
| ------------- | ---------------------------- | --------------------------------- | -------------------- |
| **web** | Next.js, Rails, Django | web-fullstack-architecture.md | (TBD) |
| **mobile** | React Native, Flutter, Swift | mobile-app-architecture.md | (TBD) |
| **game** | Unity, Godot, Phaser | game-engine-architecture.md | Unity, Godot, Phaser |
| **embedded** | ESP32, STM32, Raspberry Pi | embedded-firmware-architecture.md | (TBD) |
| **backend** | Express, FastAPI, gRPC | backend-service-architecture.md | (TBD) |
| **data** | Spark, Airflow, MLflow | data-pipeline-architecture.md | (TBD) |
| **cli** | Commander, Click, Cobra | cli-tool-architecture.md | (TBD) |
| **desktop** | Electron, Tauri, Qt | desktop-app-architecture.md | (TBD) |
| **library** | npm, PyPI, cargo | library-package-architecture.md | (TBD) |
| **infra** | Terraform, K8s Operator | infrastructure-architecture.md | (TBD) |
| **extension** | Chrome, VS Code plugins | desktop-app-architecture.md | (TBD) |
### 171 Technology Combinations
The workflow maintains a registry (`templates/registry.csv`) with 171 pre-defined technology stack combinations:
**Examples:**
- `web-nextjs-ssr-monorepo` → Next.js SSR, TypeScript, monorepo
- `game-unity-3d` → Unity 3D, C#, monorepo
- `mobile-react-native` → React Native, TypeScript, cross-platform
- `backend-fastapi-rest` → FastAPI, Python, REST API
- `data-ml-training` → PyTorch/TensorFlow, Python, ML pipeline
Each row maps to:
- **template_path**: Architecture document structure (11 templates)
- **guide_path**: Engine/framework-specific guidance (optional)
---
## Architecture Flow
### Step 0: Prerequisites and Scale Check
Load `project-workflow-status.md`:
- Extract: `project_level` (0-4), `project_type` (web/game/mobile/etc.), `field_type` (greenfield/brownfield)
- Validate: PRD exists, UX spec exists (if UI project)
- **Skip if Level 0** (single atomic change)
### Step 1: Requirements Analysis
**For Games:**
- Read **GDD** (Game Design Document)
- Extract: gameplay mechanics, engine (Unity/Godot/etc.), platform, multiplayer
**For Everything Else:**
- Read **PRD** (Product Requirements Document)
- Extract: FRs, NFRs, epics, stories, integrations
**For UI Projects:**
- Read **UX Specification**
- Extract: screens, flows, component patterns
### Step 2: User Skill Level
Ask user: Beginner / Intermediate / Expert
- Affects verbosity of generated architecture
### Step 3: Architecture Pattern
Determine:
- Architecture style (monolith, microservices, serverless, etc.)
- Repository strategy (monorepo, polyrepo, hybrid)
- Pattern-specific choices (SSR for web, native vs cross-platform for mobile)
### Step 4: Epic Analysis
Analyze PRD epics:
- Identify component boundaries
- Map domain capabilities
- Determine service boundaries (if microservices)
### Step 5: Project-Type Questions
Load: `project-types/{project_type}-questions.md`
- Ask project-type-specific questions (not yet engine-specific)
### Step 6: Load Template + Guide
**6.1: Search Registry**
```
Read: templates/registry.csv
Match WHERE:
- project_types = {determined_type}
- languages = {preferred_languages}
- architecture_style = {determined_style}
- tags overlap with {requirements}
Get: template_path, guide_path
```
**6.2: Load Template**
```
Read: templates/{template_path}
Example: templates/game-engine-architecture.md
This is a COMPLETE document structure with:
- Standard sections (exec summary, tech stack, data arch, etc.)
- Pattern-specific sections (Gameplay Systems for games, SSR Strategy for web)
- All {{placeholders}} to fill
```
**6.3: Load Guide (if available)**
```
IF guide_path not empty:
Read: templates/{guide_path}
Example: templates/game-engine-unity-guide.md
Guide contains:
- Engine/framework-specific questions
- Architecture patterns for this tech
- Common pitfalls
- Specialist recommendations
- ADR templates
```
**Example Flow for Unity Game:**
1. GDD says "Unity 2022 LTS"
2. Registry match: `game-unity-3d``game-engine-architecture.md` + `game-engine-unity-guide.md`
3. Load complete game architecture template
4. Load Unity-specific guide
5. Ask Unity-specific questions (MonoBehaviour vs ECS, ScriptableObjects, etc.)
6. Fill template placeholders
7. Generate `solution-architecture.md` + `architecture-decisions.md`
### Step 7: Cohesion Check
Validate architecture quality:
- 100% FR/NFR/Epic/Story coverage
- Technology table has specific versions
- No vagueness ("a library", "some framework")
- Design-level only (no implementation code)
- Generate Epic Alignment Matrix
---
## File Structure
```
/solution-architecture/
├── README.md # This file
├── workflow.yaml # Workflow configuration
├── instructions.md # Main workflow logic
├── checklist.md # Validation checklist
├── ADR-template.md # ADR document template
├── templates/ # Architecture templates and guides
│ ├── registry.csv # 171 tech combinations → templates
│ ├── game-engine-architecture.md # Complete game architecture doc
│ ├── game-engine-unity-guide.md # Unity-specific guidance
│ ├── game-engine-godot-guide.md # Godot-specific guidance
│ ├── game-engine-web-guide.md # Phaser/PixiJS/Three.js guidance
│ ├── web-fullstack-architecture.md
│ ├── web-api-architecture.md
│ ├── mobile-app-architecture.md
│ ├── embedded-firmware-architecture.md
│ ├── backend-service-architecture.md
│ ├── data-pipeline-architecture.md
│ ├── cli-tool-architecture.md
│ ├── desktop-app-architecture.md
│ ├── library-package-architecture.md
│ └── infrastructure-architecture.md
└── project-types/ # Project type detection and questions
├── project-types.csv # 12 project types + detection keywords
├── game-questions.md
├── web-questions.md
├── mobile-questions.md
└── ... (12 question files)
```
---
## Template System
### Complete, Standalone Templates
Each template in `templates/` is a **complete** architecture document structure:
**Standard Sections (all templates):**
1. Executive Summary
2. Technology Stack and Decisions (required table)
3. Architecture Overview
4. Repository and Service Strategy
5. Data Architecture
6. Component and Integration Overview
7-N. **Pattern-Specific Sections** (varies by template)
N+1. Proposed Source Tree
N+2. Getting Started (Human Setup)
N+3. Implementation Patterns and Conventions (Agent Guidance)
N+4. Testing Strategy
N+5. Deployment and Operations
N+6. Security
N+7. Specialist Sections
**Pattern-Specific Sections Examples:**
**Game Engine Template:**
- Gameplay Systems (player controller, game state)
- Scene Architecture
- Asset Pipeline
- Audio Architecture
- Save System
- Multiplayer Architecture (if applicable)
**Web Fullstack Template:**
- Frontend Architecture
- Backend Architecture
- API Design (REST/GraphQL/tRPC)
- State Management
- SSR/Caching Strategy
- Performance Optimization
**Embedded Firmware Template:**
- Hardware Architecture
- Communication Protocols
- Power Management
- Sensor/Actuator Integration
- OTA Update Strategy
---
## Guide System
### Engine/Framework-Specific Guides
Guides are **workflow instruction documents** that:
- Ask engine-specific questions
- Provide architecture pattern recommendations
- Suggest what sections to emphasize
- Define ADRs to create
**Guides are NOT:**
- ❌ Reference documentation (use official docs)
- ❌ Tutorials (how to code)
- ❌ API references
**Guides ARE:**
- ✅ Question flows for architecture decisions
- ✅ Pattern recommendations specific to the tech
- ✅ Common pitfalls to avoid
- ✅ Specialist recommendations
**Example: game-engine-unity-guide.md**
```markdown
## Unity Architecture Questions
- MonoBehaviour or ECS?
- ScriptableObjects for game data?
- Addressables or Resources?
## Unity Patterns
- Singleton GameManager (when to use)
- Event-driven communication
- Object pooling strategy
## Unity-Specific Sections to Include
- Unity Project Configuration
- Scene Architecture
- Component Organization
- Package Dependencies
## Common Pitfalls
- Caching GetComponent calls
- Avoiding empty Update methods
```
---
## ADR Tracking
Architecture Decision Records are maintained separately in `architecture-decisions.md`.
**ADR Format:**
```markdown
### ADR-001: [Decision Title]
**Date:** YYYY-MM-DD
**Status:** Accepted | Rejected | Superseded
**Decider:** User | Agent | Collaborative
**Context:**
What problem are we solving?
**Options Considered:**
1. Option A - pros/cons
2. Option B - pros/cons
3. Option C - pros/cons
**Decision:**
We chose Option X
**Rationale:**
Why we chose this over others
**Consequences:**
- Positive: ...
- Negative: ...
**Rejected Options:**
- Option A rejected because: ...
```
**ADRs are populated throughout the workflow** as decisions are made:
- Step 3: Architecture pattern ADR
- Step 5: Technology selection ADRs
- Step 6: Engine-specific ADRs (from guide)
---
## Scale-Adaptive Behavior
| Level | Project Size | Architecture Depth | Specialist Sections |
| ----- | -------------------------------- | --------------------------- | -------------------------- |
| **0** | Single task | Skip architecture | N/A |
| **1** | Small feature (1-10 stories) | Lightweight, essential only | Inline guidance |
| **2** | Small project (5-15 stories) | Standard depth | Inline guidance |
| **3** | Standard project (12-40 stories) | Comprehensive | Specialist placeholders |
| **4** | Ambitious product (40+ stories) | Comprehensive + specialists | Specialist recommendations |
---
## Specialist Integration
Pattern-specific specialists are recommended based on project characteristics:
**Game Projects:**
- Audio Designer (music, SFX, adaptive audio)
- Performance Optimizer (profiling, optimization)
- Multiplayer Architect (netcode, state sync)
- Monetization Specialist (IAP, ads, economy)
**Web Projects:**
- Frontend Architect (component design, state management)
- Backend Architect (API design, microservices)
- DevOps Specialist (CI/CD, deployment)
- Security Specialist (auth, authorization, secrets)
**Embedded Projects:**
- Hardware Integration (sensors, actuators, protocols)
- Power Management (battery, sleep modes)
- RF/Wireless (WiFi, BLE, LoRa)
- Safety Certification (if required)
Specialists are documented with:
- When they're needed
- What they're responsible for
- How they integrate with the workflow
---
## Key Differences from Legacy HLA Workflow
| Aspect | Legacy HLA | New Solution Architecture |
| ------------------- | --------------- | ----------------------------------------- |
| **Templates** | Fixed structure | 11 complete templates, pattern-specific |
| **Tech Selection** | Manual | 171 pre-defined combinations |
| **Engine Guidance** | Generic | Engine-specific guides (Unity/Godot/etc.) |
| **ADRs** | Inline | Separate document |
| **GDD Support** | No | Yes, for game projects |
| **Guides** | None | Pattern-specific workflow guidance |
| **Scale** | One size | Adaptive Levels 0-4 |
---
## Validation and Quality Gates
### Cohesion Check (Step 7)
**Validates:**
- ✅ 100% FR coverage (or gaps documented)
- ✅ 100% NFR coverage (or gaps documented)
- ✅ Every epic has technical foundation
- ✅ Every story can be implemented with current architecture
- ✅ Technology table complete with specific versions
- ✅ No vagueness detected
- ✅ Design-level only (no over-implementation)
**Outputs:**
- `cohesion-check-report.md` - Pass/fail with detailed gaps
- `epic-alignment-matrix.md` - Mapping validation
**If cohesion check fails:**
- Document gaps
- Update architecture
- Re-run check
---
## Getting Started for Implementers
### For Games:
1. Run `workflow plan-project` → Create GDD
2. Specify engine in GDD (Unity/Godot/Phaser/etc.)
3. Run `workflow solution-architecture`
4. System detects engine from GDD
5. Loads game-engine template + engine-specific guide
6. Generates Unity/Godot/Phaser-specific architecture
### For Web Apps:
1. Run `workflow plan-project` → Create PRD
2. Run `workflow ux-spec` → Create UX spec
3. Run `workflow solution-architecture`
4. Answer: SSR or SPA? Monolith or microservices?
5. System loads web-fullstack template
6. Generates framework-specific architecture
### For Other Projects:
1. Run `workflow plan-project` → Create PRD
2. Run `workflow solution-architecture`
3. Answer project-type questions
4. System loads appropriate template
5. Generates pattern-specific architecture
---
## Extending the System
### Adding a New Template
1. Create `templates/new-pattern-architecture.md`
2. Include all standard sections + pattern-specific sections
3. Add rows to `templates/registry.csv` pointing to new template
### Adding a New Guide
1. Create `templates/new-tech-guide.md`
2. Include: questions, patterns, pitfalls, specialist recommendations
3. Update `templates/registry.csv` with `guide_path` column
### Adding a New Project Type
1. Add row to `project-types/project-types.csv`
2. Create `project-types/new-type-questions.md`
3. Ensure templates exist for this type
4. Update instructions.md if special handling needed (like GDD for games)
---
## Questions?
- **Validation:** See `checklist.md`
- **Workflow Logic:** See `instructions.md`
- **Configuration:** See `workflow.yaml`
- **Registry Format:** See `templates/registry.csv`
- **Example Guide:** See `templates/game-engine-unity-guide.md`
---
_This workflow replaces the legacy HLA workflow with a modern, scale-adaptive, pattern-aware architecture generation system._