AI Chronicles #6: Output Tracker

In this weekly livestream series, Ted M. Young and I build an AI-powered role-playing game using React, Spring Boot, and Nullables. And, of course, plenty of discussion about design, architecture, and effective programming practices.

Watch us live every Monday! For details, see the event page. For more episode recordings, see the episode archive.

In this episode...

We continue working on our front end. After some conversation about working in small steps, we turn our attention to BackEndClient, our front-end wrapper for communication to the back-end server. We start out by writing a test to define the back-end API, then modify our HttpClient wrapper to track requests. By the end of the episode, we have the back-end requests tested and working.


  • Program Note (0:12)
  • Multi-Step Refactorings (2:26)
  • Work in Small Steps (6:31)
  • Evaluating Complexity (11:11)
  • Collaborative Development (19:04)
  • Continuous Improvement (25:24)
  • Fixing the Typechecker (28:02)
  • Today’s Plan (31:11)
  • James Shore’s Housecleaning Tips (33:03)
  • Build the BackEndClient (35:59)
    • Sidebar: Delaying Good Code (38:48)
    • End sidebar (41:41)
  • Make HttpClient Nullable (51:02)
    • Sidebar: Tuple (58:48)
    • End sidebar (1:00:29)
  • Stubbing the fetch() Response (1:09:24)
    • Sidebar: In-Browser Testing (1:26:37)
  • Build OutputListener (1:28:00)
  • Request Tracking (1:55:04)
    • Sidebar: Sidebar: Lint Error (2:12:54)
    • End sidebar (2:16:50)
  • Back to the BackEndClient (2:33:51)
  • Debrief (2:44:23)

Source code

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