doncheli-diagramlisted

# Don Cheli: Diagram Generator ## Instructions 1. Determine the diagram type from the request or flag: class, sequence, architecture, erd, flowchart 2. Identify the scope: specific file, module, feature, or full project 3. Analyze the relevant source files: - **class**: parse class/interface definitions, inheritance, and composition - **sequence**: trace function calls, async flows, and inter-module communication - **architecture**: identify top-level modules, external services, and data flows (C4 Context/Container) - **erd**: parse ORM models, entity fields, and relationships - **flowchart**: follow conditional logic for a specific feature or endpoint 4. Build the Mermaid diagram — validate syntax mentally before outputting 5. Keep diagrams readable: maximum 20 nodes, split into subdiagrams if larger 6. Never invent relationships not present in the code 7. Add a generation timestamp as a Mermaid comment 8. Offer to embed the diagram in the target file (README, spec doc, ADR) ## Supported Outputs - Inline Mermaid code blocks (default) — renders in GitHub, GitLab, Notion - C4 PlantUML (with `--format c4`) for advanced architecture docs - Save to file with `--output <path>` ## Quality Gate - If the analyzed scope yields fewer than 3 nodes, warn the user the diagram may not be useful - If source files are not readable (permissions, binary), skip and report which files were skipped - Do not use this skill to generate diagrams from memory — always analyze actu