hjemmesidekongen/mermaid-diagrams
plugins/kronen/skills/mermaid-diagrams/SKILL.md
Create software diagrams using Mermaid syntax. Use when generating class diagrams, sequence diagrams, flowcharts, ERDs, state diagrams, git graphs, or gantt charts. For C4 architecture diagrams specifically, use c4-architecture instead.
testing
Updated Apr 5, 2026
$ install --global
skillsauthnpx skillsauth add hjemmesidekongen/ai mermaid-diagramsInstall this skill globally with one command. Works with Claude Code, Cursor, and Windsurf.
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Last scanned: Apr 5, 2026, 5:16 PM117.3s9 files scanned
SKILL.md
- name:
- mermaid-diagrams
- description:
- |
- user_invocable:
- true
- interactive:
- true
- depends_on:
- []
- reads:
- []
- type:
- data_validation
- - name:
- diagram_renders
- verify:
- Mermaid diagram uses valid syntax for the declared diagram type
- fail_action:
- Fix syntax errors using the appropriate reference file
- on_fail:
- Fix diagram syntax and re-verify
- on_pass:
- Diagram generated with valid Mermaid syntax
- model_tier:
- junior
- origin:
- original
- ported_date:
- 2026-03-09
- iteration:
- 1
- changes:
- ["initial creation"]
Mermaid Diagramming
Generate professional diagrams from text definitions. Mermaid renders in GitHub, GitLab, VS Code, Notion, and Obsidian natively.
Diagram Type Selection
| Need | Diagram Type | Reference | |------|-------------|-----------| | Domain modeling, OOP design | Class diagram | class-diagrams.md | | API flows, auth sequences, interactions | Sequence diagram | sequence-diagrams.md | | Processes, algorithms, user journeys | Flowchart | flowcharts.md | | Database schemas, table relationships | ERD | erd-diagrams.md | | System architecture (multi-level) | C4 diagram | c4-diagrams.md | | Cloud infra, CI/CD, deployments | Architecture diagram | architecture-diagrams.md | | Themes, styling, layout, export | Advanced features | advanced-features.md |
Core Syntax
All diagrams follow: diagram type declaration, then definition content.
diagramType
definition content
Use %% for comments. First line declares type (classDiagram, sequenceDiagram, flowchart, erDiagram, C4Context, C4Container, C4Component, architecture-beta).
Quick examples and configuration: references/process.md
Principles
- Start simple — add details incrementally
- One concept per diagram — split large systems into focused views
- Use meaningful labels — make diagrams self-documenting
- Store
.mmdfiles alongside code for version control - Load the relevant reference file for full syntax before generating complex diagrams
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