diagram-design vs Kami

diagram-design

• Developers who already use a supported coding agent and want architecture or flow diagrams without learning a diagram language
• Teams that want diagrams to follow their own brand colors and fonts
• People who want diagrams they can open by double-clicking, with no server needed
• Anyone who wants to import existing Mermaid, draw.io, or Excalidraw files and redraw them

Kami

• People who use Claude Code, Codex, or Cursor and want polished documents without manual layout work
• Writers or founders who need one-pagers, resumes, or formal letters in a consistent style
• Developers who want technical reports or changelogs rendered as clean PDFs
• Users who write in Chinese, Japanese, or Korean and need proper font handling

diagram-design

• Output is one self-contained HTML and SVG file that opens without extra tooling
• Works across many agent hosts, with installation steps documented for each
• Licensed under MIT

Kami

• Installs through a single documented command for several major agents
• Covers multiple languages with language-specific font fallbacks
• Optional brand profile file lets you reuse your color, name, and tone settings

diagram-design

• People without a supported AI coding agent, since the project is delivered as an agent skill and the README does not describe a standalone app
• Anyone who needs live, collaborative diagram editing, which the README does not mention
• Teams that need a fully manual drag-and-drop editor, because the agent chooses the diagram type and writes the file

Kami

• People who need precise pixel-level control in a visual editor, since Kami works through an agent and templates rather than a drag-and-drop interface
• Windows users who do not want to use WSL, because the README says helper scripts are Bash and native Windows needs separate GTK/Pango setup
• Anyone who cannot run an AI agent, since the skill is designed to be triggered by agent requests

diagram-design

• The README does not state a release version, so update behavior depends on each host's install path
• Quality and type choice depend on the agent that runs the skill, which the README does not evaluate
• Some install paths (such as the Cowork organization marketplace) require extra setup like mirroring the repository

Kami

• Setup depends on external tools such as WeasyPrint, and the README says native Windows needs extra GTK/Pango runtime installation
• Some features, like syntax highlighting, degrade gracefully when optional packages such as Pygments are missing
• Output quality and layout depend on the AI agent driving it, which the README does not fully detail