c4-modelinglisted

# C4 Modeling Skill Create hierarchical architecture diagrams at four abstraction levels using the C4 model and Mermaid syntax. ## Variables | Variable | Default | Description | |----------|---------|-------------| | DEFAULT_LEVEL | context | Start with `context`, `container`, `component`, or `code` | | OUTPUT_FORMAT | mermaid | `mermaid`, `structurizr`, `plantuml` | | INCLUDE_LEGEND | true | Add legend to diagrams | ## Instructions **MANDATORY** - Follow the Workflow steps below when creating C4 diagrams. - Always start at Level 1 (Context) and zoom in as needed - Never mix abstraction levels in a single diagram - Include descriptions for all elements ## Red Flags - STOP and Reconsider If you're about to: - Create a container diagram without first creating a context diagram - Mix containers and components in the same diagram - Show implementation details at the context level - Create a code-level diagram for non-critical code **STOP** -> Check the appropriate level guidelines in `reference/level-guidelines.md` -> Then proceed ## Workflow 1. [ ] Determine the audience and purpose 2. [ ] **CHECKPOINT**: Start at Level 1 (Context) unless you have higher-level diagrams 3. [ ] Identify all actors and systems at current level 4. [ ] Define relationships with labeled arrows 5. [ ] Add technology choices (for Level 2+) 6. [ ] **CHECKPOINT**: Verify you haven't mixed abstraction levels 7. [ ] Include descriptions for clarity ## C4 Levels | Level | Name | Purpose | Audien