DEDUPEDWho it is forDeveloper joining a project or reviewing a pull request who needs a quick mental map of an unfamiliar repo
The problemReading folders and files one by one makes it hard to see how the pieces connect.
The outcomeA component and data-flow diagram of the repo that you can review with teammates before approving or writing code.
What you need first
- An Agent Skills compatible host such as Claude Code, Codex, Cursor, Qoder, GitHub Copilot, Gemini CLI, Cline, Windsurf or Amp
- Node.js for the npx install command
- A browser to open the generated HTML file
- Optional: a public website URL for brand onboarding
Steps
- Install the skill with: npx skills add cathrynlavery/diagram-design
- Point your agent at the repo and ask it to map the main components and how they talk to each other.
- Open the HTML file and compare each box and arrow with the actual code paths.
- Ask for corrections where the diagram is wrong, then keep the final version in the project docs.
Prompt for your agent
Use the diagram-design skill to map the components and connections in <repo path or URL> as one HTML and SVG diagram. List any connection you were unsure about so I can verify it against the code.
Caveat. The diagram reflects what the agent inferred from the code it read, so it can miss runtime wiring or hidden dependencies. Treat it as a first draft to verify.
About diagram-design
An agent skill that draws clean diagrams as a single HTML and SVG file in your brand. Part of this week's top 10 repos: ranked #8 on Repo Radar. View cathrynlavery/diagram-design on GitHub.
More with diagram-design
- Draw an architecture diagram for your README without a design tool Describe your app in plain words and get a clean HTML and SVG diagram to drop into your README.
- Draw the plan before your agent writes the code Ask for a flow or sequence diagram of a proposed change and approve the design first.
- Draw your agent setup: tools, data flows and approval points Diagram which tools your AI agent can call, where data moves and where a human must approve.
- Pair diagrams with a video skill to explain a GitHub repo Use the diagram skill alongside HyperFrames to turn a repo README into a short explainer video.
- Make every diagram match your website's colors and fonts Give the skill your site URL once and every later diagram uses your palette and fonts.
- Redraw an old Mermaid or draw.io diagram in a cleaner style Import an existing Mermaid, draw.io or Excalidraw file and get it back as a polished editorial diagram.
- Add light motion to a diagram that explains steps in order Turn on optional motion so a process diagram reveals its steps one after another.
Disclaimer
Deduped lists open-source repositories that belong to other people. We do not own, maintain, audit, or vouch for any of them, and a repo appearing here is not an endorsement or a safety check. The use cases, steps, and prompts are written by AI and may be incomplete, outdated, or just wrong. Where a use case is marked "Seen in the wild", we link to public posts where someone described something similar, but we have not verified those posts and the use case itself is still our AI's own write-up. Use all of this at your own risk. Only run code, commands, or agents on systems and accounts you are authorized to use, and read the code and every command before you run it, especially anything that touches credentials, files, or the network. Nothing here is professional, security, legal, or financial advice. All trademarks and project names belong to their respective owners, and their use here does not imply affiliation. Content is provided as is, without warranties of any kind. Found a mistake, a safety problem, or something you want removed? Email [email protected] and we will look at it promptly. Full disclaimer page