I’ll start this by saying I am not a programmer. As such, I’ve used Claude Code to do most of the coding, so I expect some issues on the vibe coding front.

As a hobby I do block printing - usually linoleum, sometimes I 3-d print plates to make prints. One of the techniques that I use to make multi-colored prints is called reduction printing (https://en.wikipedia.org/wiki/Printmaking). Instead of carving multiple blocks, one for each color, you use the same block, and with each layer you leave behind in the negative space some of the previous color(s). It is sometimes difficult for me to visualize what this should look like, so I created this simulator/planner to help.

The workflow is: 1. Upload an image 2. Crop image (free or to an aspect ratio for your block). I think you need to at least acknowledge the crop even if using the whole image. 3. Quantize/posterize the image to a set number of colors. 4. Optionally flip the image so when it is relief printed it turns back the right way 5. Generate the layers 6. Export the layers as individual images. 7. Generate a gif that simulates what the printed image would look like one layer at a time.

This was originally made with server-side image processing in python (what i feel sort of comfortable with), but I figured I may as well try to get this all client-side in the browser so it can be deployed as a static site to Cloudflare Pages or Github Pages. After getting it working, Claude planned and executed the migration. This now runs totally in the browser. I was surprised that the projects persist between sessions, but they do.

For me this was as much an exercise in exploring what can be done with a bit of planning and some vibe coding as it is to help me with my hobby.

Any feedback is appreciated.

Github: https://github.com/greghirson/reduction_planner

I will eventually write a post about it at https://greg.hirson.xyz, where you can also see some of the block prints I’ve made (reduction or otherwise).

The writing was always the cheap part

Is LipoVive Legit? 2026 Reddit and Health Forum Roundup

Agents of Chaos

Socialist Excellence in New York City

Data center developers asked Trump for an exemption from pollution rules

Fry's Food and Drug

Show HN: AgentPass – Identity layer for AI agents (passports, email, trust)

Agent context management: ephemeral vs. durable classification

AI_ATTRIBUTION.md: A Standard for Tracking Creative Control in Human-AI Coding

vLLM WideEP and Large-Scale Serving Toward Maturity on Blackwell (Part I)

Webgrid Eval: LLM vision + tool-use on Neuralink's cursor control task

You Can't Buy a Data Center

I rebuilt Game Boy on web using 1 prompt and 5 parallel agents in 48 hours

SQL Has Problems. We Can Fix Them: Pipe Syntax in SQL [pdf]

Built a Clone of Expedia but Better

Turing Completeness of GNU Find: From Mkdir-Assisted Loops to Standalone Comput

DataClaw: Publish your Claude Code chats to HuggingFace with a single command

Hegseth threatens to blacklist Anthropic over AI-controlled weapons [video]

The Eternal Promise: A History of Attempts to Eliminate Programmers

Cyclical Generative Mania – a satirical pharma site for an AI-induced condition

Show HN: Reduction Blockprint Planner/Simulator

Spotify Announces the "Music-Streaming Urn"

Anthropic accuses DeepSeek and other Chinese rivals of mass data theft

Tech Firms Aren't Just Encouraging Their Workers to Use AI. They're Enforcing It

Show HN: A free tool to turn your boring screenshots brutalist in seconds

Monty's Gauntlet

How to give your AI real personality

DeepSeek-v3.2 on GB300: Performance Breakthrough

Faaaah on Fail – VSCode Extension to Play "Faaaah" Sound on Test Failure

Quotes from Moral Mazes (2019)

Ask HN: Is Meshtastic worth it, what have you done with it?