Rob's Workshop

Spider: A Fast, Scalable Spider Graph Generator for Humans and AI

Rob Montero ·

Modern engineering has entered a new era. With tools like Claude Code, GitHub Copilot, and Antigravity, the speed at which experienced engineers can design and ship useful tools has increased dramatically. What once took days or weeks can now be built in hours.

Spider is a perfect example of that shift.

The project, documented in detail at Rob Montero’s Spider article, is a lightweight but powerful tool designed to generate spider graphs at scale. Spider graphs, also known as radar charts, are commonly used to visualize multidimensional data such as skills, performance metrics, or capability models. Instead of static charts created manually in spreadsheets, Spider exposes a programmable interface so these visualizations can be generated dynamically and automatically.

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Built for Speed and Scale

Spider was designed with a simple goal: to generate spider graphs quickly and reliably for large volumes of data.

Rather than focusing only on visualization, the tool exposes an API and MCP interface that allows both humans and AI agents to programmatically create graphs. This makes it particularly useful in automated workflows where data must be visualized continuously or generated on demand.

Typical use cases include:

  • Skills assessments and capability mapping
  • Talent evaluation dashboards
  • Product comparison matrices
  • Performance analytics visualizations
  • AI agent-generated reporting

Because the graph structure is deterministic, Spider can render complex multidimensional datasets consistently and efficiently.

Designed for AI-Driven Workflows

One of the most interesting aspects of Spider is that it is built with AI-native development in mind.

The tool can be used directly by:

  • AI agents generating reports
  • developer tooling pipelines
  • automated analytics systems
  • dashboards and applications that require structured visual outputs

Instead of forcing developers to construct charts manually, Spider lets systems describe the dimensions, scale, and values, and the tool automatically generates the visualization.

In other words, it turns spider graphs into a programmable primitive.

A Small Tool with Big Impact

Spider reflects a broader trend in modern engineering. The combination of strong engineering fundamentals and AI-assisted development means experienced developers can now build focused tools that solve real problems quickly.

Small tools like this often end up being the most powerful, because they do one thing extremely well and integrate easily into larger systems.

Spider is exactly that kind of tool: simple, fast, and built to scale with modern workflows.

If you want to explore the design and implementation details, you can read the full write-up here:

https://rob.cr/articles/spider