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Create architecture docs, stack choices, Mermaid diagrams, cost/ops estimates, module maps, or system design files. Use when mapping full architecture or changing structure.
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| name | create-architecture |
| description | Create architecture docs, stack choices, Mermaid diagrams, cost/ops estimates, module maps, or system design files. Use when mapping full architecture or changing structure. |
# Architecture — <system/feature>
## Scope
- Covered system/feature.
- Non-goals.
## Current structure
- `<path>` — responsibility.
- Important dependencies and ownership.
## Stack
| Layer | Current / proposed choice | Reason | Alternatives rejected |
|---|---|---|---|
| Frontend | <framework/library> | <why> | <alternatives> |
| Backend/API | <framework/runtime> | <why> | <alternatives> |
| Data/storage | <database/cache/blob/etc.> | <why> | <alternatives> |
| Infra/deploy | <platform/hosting/queue/etc.> | <why> | <alternatives> |
## Target structure
- Modules and boundaries.
- Data/control flow.
- Required Mermaid diagram when architecture spans more than one module/service.
```mermaid
flowchart TD
User[User] --> UI[Frontend]
UI --> API[API / Backend]
API --> Data[(Data store)]
| Area | Approx cost / complexity | Notes |
|---|---|---|
| Runtime/hosting | <low/medium/high or €/month estimate> | |
| Database/storage | <low/medium/high or €/month estimate> | |
| Third-party APIs | <low/medium/high or €/month estimate> | |
| Maintenance | <low/medium/high> |
State assumptions clearly. Use rough ranges when exact prices are unknown.