Fable 5 in Claude Code builds Riemann Hypothesis site and self-composed video in two prompts
Fable 5 inside Claude Code was used to generate a full interactive educational website on the Riemann Hypothesis — plus a promotional video with a soundtrack composed from the non-trivial zeros of the zeta function — using just two prompts.
Score breakdown
The post demonstrates an agent autonomously performing self-QA, mathematical verification to 9 decimal places, and unsolicited creative decisions — all within two prompts — extending what agentic coding tools handle beyond code generation into end-to-end product and media production.
- 01Fable 5 was run inside Claude Code and given two prompts to complete the entire project.
- 02Prompt 1 produced a 5-level interactive website with playable animations, a difficulty ladder, dark mode, and mobile support.
- 03The agent autonomously computed mathematical data, cross-checked it against published research tables to 9 decimal places, and browser-tested every page and interaction without being asked.
The post describes stress-testing Fable 5 running inside Claude Code by giving it what the author calls the hardest possible challenge: explaining the Riemann Hypothesis — a 165-year-old unsolved problem carrying a $1M prize and notoriously difficult to communicate to non-mathematicians. The first prompt asked for an interactive website capable of taking anyone with no math background from "what is a prime number?" all the way to a genuine understanding of the hypothesis. The result was a 5-level interactive journey featuring playable animations, a difficulty ladder, dark mode, and mobile-ready design.
The agent compared two video frameworks, selected one, and reused the site's existing design system for visual consistency.
What stood out most to the author, however, was behavior that was never requested: the agent computed the underlying mathematical data itself, cross-checked it against published research tables to 9 decimal places, then opened a browser and tested every page and interaction before reporting completion — a full self-QA loop performed autonomously.
The second prompt asked simply for a promotional video. The agent compared two video frameworks, selected one, and reused the site's existing design system for visual consistency. It then proposed — again without being asked — that instead of stock music, the soundtrack be composed from the mathematics itself: every note in the score is one of the non-trivial zeros of the zeta function. The agent wrote the narration, generated the voiceover, and mixed the audio, producing a video the post describes as "the music of the primes, literally scored by the primes." The post references the URL riemann.adilmoujahid.com for the finished site.
Key facts
- 01Fable 5 was run inside Claude Code and given two prompts to complete the entire project.
- 02Prompt 1 produced a 5-level interactive website with playable animations, a difficulty ladder, dark mode, and mobile support.
- 03The agent autonomously computed mathematical data, cross-checked it against published research tables to 9 decimal places, and browser-tested every page and interaction without being asked.
- 04Prompt 2 asked only for a promotional video; the agent compared two video frameworks and selected one.
- 05The agent proposed and composed an original soundtrack where every note is a non-trivial zero of the zeta function — an idea the author never requested.
- 06The agent also wrote narration, generated a voiceover, and mixed the audio for the video.
- 07The post references the URL riemann.adilmoujahid.com for the finished site.
Topics
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