Rapid App Prototyping with Claude Code | AthlyticZ

The methodology changing how data teams ship

Rapid App
Prototyping
with Claude Code.

Source documents to production-grade interactive applications. Not prototypes. Not demos. Deployed tools running real computation, real data, real inference. Built in days, not quarters.

Workshop dates announced once Posit infrastructure is live. Members get first access.

claude-code ~/rapid-app
MLB R&D / 7 years PhD Statistics / Iowa State Posit / Official Partner NSF IGERT Fellow 15+ countries

The RAP Framework

Four Phases. One Weekend. Production Output.

A repeatable architecture for turning domain expertise and source documents into deployed interactive applications using Claude Code.

01

Extract

Feed source documents, research papers, rulebooks, and datasets to Claude Code. It parses structure, identifies computational primitives, and surfaces the data model.

02

Compute

Build the engine. Stan models, ODE solvers, Monte Carlo simulations, plumber APIs. Claude Code writes the computation layer while you validate against published data.

03

Render

Transform computation into interactive D3.js visualizations. Force layouts, animated transitions, responsive SVG. Design systems that look like they were built by a team.

04

Ship

Deploy to Posit Connect. Custom domains, authentication, monitoring. Hand a live URL to your employer, your client, or a front office. It runs. It scales.

This is not a tutorial. This is how production apps get built now.

Members save 20% on all workshops and get first access to cohort dates.

Explore Membership

Built with this methodology

The Portfolio

Every one of these started as PDFs and a Claude Code session. No React. No build step. Real domain logic running in the browser.

MLB Scout LLM

Interactive scouting language model. Natural language player evaluations grounded in Statcast data.

LLMMLBTool Use

Ice Vision: Hockey Fatigue

Big Data Cup tracking data. Interactive D3 game timeline with real-time fatigue monitoring.

D3.jsHockeyBig Data Cup

Diamond Shift

OAA leaderboard data driving defensive shift cards. Agentic LLM generates scouting narratives.

Agentic LLMMLBStatcast

The Production Stack

What You Actually Ship With

Not toy tools. The same infrastructure used by MLB front offices, pharma R&D teams, and Fortune 500 data orgs.

AI

Claude Code

Agentic coding from the terminal. File creation, editing, git, deployment. Claude writes production code while you steer with domain knowledge.

Visualization

D3.js + SVG

Force-directed layouts, animated transitions, interactive drill-downs. Pixel-perfect responsive graphics that run anywhere with zero dependencies.

Inference

Bayesian / Stan

Physics-constrained priors, hierarchical models, MCMC diagnostics. The statistical backbone behind every serious analytical tool.

Compute

Plumber APIs

Expose R and Python computation as REST endpoints. Frontend calls backend. Backend runs the model. Clean separation of concerns.

Platform

Posit Connect

One-click deployment. Custom domains, authentication, usage monitoring, scheduled reports. Enterprise-grade hosting for data products.

Engineering

ODE Solvers

Runge-Kutta integration, elastic collisions, Monte Carlo uncertainty. When the domain has physics, the app has physics.

Your Instructor

Michael S. Czahor, PhD

Seven years in MLB front offices across three organizations. Lead QA, Principal QA, and Special Assistant roles building the analytical infrastructure that directly informed roster construction and player evaluation decisions at the Philadelphia Phillies, Detroit Tigers, and Miami Marlins.

PhD in Statistics with a specialization in Wind Engineering from Iowa State University. NSF IGERT Fellow. Research at the intersection of probabilistic modeling, physical systems, and real-time decision-making.

Founder and President of AthlyticZ. Official Posit Partner. Advisory board member at Boston College and Lasell University. Teaching data science, Bayesian modeling, and application development across 15+ countries.

7
Years MLB R&D
3
MLB Organizations
15+
Countries Trained
PhD
Statistics / ISU

The Future of How
Production Apps Get Built.

Workshop dates announced once Posit infrastructure is live. Book a discovery call to discuss cohorts, team training, or custom engagements. Members get first access and 20% off.

Expanding under our Posit partnership. Members get first access + 20% off all workshops.