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BMAD-METHOD/expansion-packs/bmad-c4-architecture/tasks/update-c4-diagram.md

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Update C4 Diagram

Purpose

Update existing C4 diagram with new elements, relationships, or modifications.

Prerequisites

  • Existing C4 model
  • Change requirements
  • Updated system information

Process

1. Analyze Current Model

  • Review existing elements
  • Identify areas for change
  • Assess impact of modifications
  • Plan update strategy

2. Implement Changes

  • Add new elements
  • Modify existing elements
  • Update relationships
  • Adjust views and styling

3. Validate Changes

  • Check syntax correctness
  • Verify consistency
  • Test view layouts
  • Ensure completeness

4. Update Documentation

  • Document changes made
  • Update element descriptions
  • Revise relationship labels
  • Update view configurations

5. Generate Updated DSL

  • Create updated DSL file
  • Preserve existing structure
  • Apply new changes
  • Maintain consistency

Change Types

  • Add Elements: New persons, systems, containers, components
  • Modify Elements: Update descriptions, technologies, properties
  • Update Relationships: Change connections, labels, technologies
  • Adjust Views: Modify layouts, add/remove elements
  • Apply Styling: Update colors, shapes, themes

Output

  • Updated Structurizr DSL file
  • Change log documentation
  • Validation report

Elicitation Questions

  1. What specific changes need to be made?
  2. Are there any elements to remove or modify?
  3. What new relationships need to be added?
  4. Should any views be updated or added?
  5. Are there any styling changes required?