ClaudeSoftwareShipping codeAI score · 64/100AI-assisted edit · no obvious prompt-injection riskX

Iterating a Zen Garden iOS App with Claude Opus 5.5

From idea validation to App Store: conversational iteration, model autonomously chose Metal shaders for math-based pixel generation

ExperiencedStepsDemo
Who
Designers/developers who want to build an app with AI
You get
Shipped Zen Garden App to App Store in 2 weeks using 25 billion tokens
You need
Claude

Constraints

Build the app iteratively with Claude (Opus 5.5): describe what you want in natural language and let the model write the code. The source does not say which Claude interface or plan was used, or how the 25 billion tokens were billed. Reader note (not from the source): shipping an iOS app generally needs Xcode and an Apple Developer account.

What they did

Inspired by @Nalden's share of @gwern's essay on samon (zen garden sand patterns), the author used Claude Opus 5.5 to develop Zen Garden App. A simple prompt produced a flat prototype in minutes; asking to 'make the scenery more realistic' led the model to autonomously use Metal shaders—calculating every pixel from scratch via math, every frame—rather than expected 3D models/textures. Each subsequent feature request (e.g., 'add a bird') was implemented beyond expectations (kingfisher landing on bridge, watching koi, diving to catch fish).

How it went

Author reports: 2 weeks, 25 billion tokens, from inspiration to App Store shipping. The model repeatedly took 'the unexpected harder route to get to a better result,' changing how the author builds. Calls Opus 5.5 'the best model out there by a long stretch' for designers, while maintaining that AI cannot 'care' and designers must bring taste. (author_report)

Steps

  1. Get inspired and validate the concept

    Give Claude (Opus 5.5) a simple prompt for a quick prototype to judge whether the idea is worth pursuing. The author, inspired by samon (the patterns raked into zen-garden sand), had a working but flat prototype within minutes.

  2. Ask for realism, discover the core technique

    Then ask it to "make the scenery more realistic." The model may propose an unexpected approach on its own—in this case no 3D models or textures, but Metal shaders calculating every pixel of moss, rocks, water and cherry blossoms from maths, every frame.

  3. Iterate features and observe model autonomy

    Keep asking for features in natural language (e.g., "add a bird") and watch how the model fills in details. Here it added birds that actually visit Japanese gardens, life-size, each with its own call, and calculated where they land and how they move.

  4. Polish details continuously until shipping

    Keep asking the model to go even harder on the tiniest details until it is ready to ship. After two weeks and 25 billion tokens, the author shipped Zen Garden to the App Store (link in the author's self-reply).

Prompt you can copy

Reference prompt · Editorial suggestion。Confirm the destination, input variables and output format before use.

This block is the prompt. Ads are never placed here.

No prompt needed — just follow the steps.

Source

用 Claude Opus 5.5 做「禅意花园」App：让它把场景做得更真实，结果全部用 Metal 着色器数学生成，帖串记录迭代直到上架 · jipvandervelde · X · 2026-10-25T12:39:54.000Z

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