sequence-diagram

Generate D2 sequence diagrams of function call flows across codebases.

1|Updated Mar 25, 2026
One-click install
npx skills add https://github.com/kenbanks-peng/skills --skill sequence-diagram-kenbanks-peng
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: sequence-diagram
Source: https://github.com/kenbanks-peng/skills/tree/main/sequence-diagram
Command: npx skills add https://github.com/kenbanks-peng/skills --skill sequence-diagram-kenbanks-peng

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Codebases often have complex function call interactions that are hard to understand from reading source alone. This skill generates a D2 sequence diagram to visualize the runtime sequence of calls across packages, files, and structs, aiding onboarding and debugging.

Core Features & Use Cases

  • Automatic flow extraction: derives call relationships from code structure and entry points to produce a clear sequence diagram.
  • D2 diagram generation: outputs a ready-to-render .d2 file named <flow-name>-sequence-diagram.d2 for documentation or analysis.
  • Visualization for debugging and onboarding: helps engineers reason about startup or interaction flows across modules.

Quick Start

Run the tool on your repository to generate the sequence diagram and save it to OUTPUT_DIR as <flow-name>-sequence-diagram.d2

Frequently Asked Questions about sequence-diagram

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I generate a sequence diagram from code to visualize function call flows?

To generate a sequence diagram, run this skill on your repository to automatically extract call relationships and output a ready-to-render D2 file. It traces interactions across packages and files from entry points to create a visual flow.

What is the best way to visualize runtime call sequences across packages for onboarding?

Visualizing runtime call sequences is best handled by generating a D2 sequence diagram that maps function interactions across modules. This approach derives relationships directly from code structure to aid onboarding and debugging.

Do I need D2 installed to generate and render sequence diagrams from my codebase?

Yes, you need D2 installed to render the sequence diagrams generated by this skill. The tool outputs a self-contained .d2 file named <flow-name>-sequence-diagram.d2 to your specified output directory for rendering.

How does static analysis trace entry points and interactions across files for diagram generation?

Static analysis traces entry points and interactions by examining the code structure to identify function call relationships across packages and files. It uses this derived flow data to build a clear sequence diagram output.

Can I use sequence diagrams for debugging complex code call interactions in my codebase?

Yes, you can use sequence diagrams for debugging complex code call interactions by visualizing the runtime sequence of calls across structs and modules. This helps engineers reason about startup and interaction flows.

What are the limitations of using D2 diagrams for code flow visualization?

Limitations of D2 diagrams for code flow visualization include requiring a local D2 installation to render outputs. The tool analyzes static code structure to derive call relationships, meaning dynamic runtime behaviors might not be fully captured.